diff options
Diffstat (limited to 'src/test/ui/consts/const-eval')
29 files changed, 279 insertions, 382 deletions
diff --git a/src/test/ui/consts/const-eval/const-pointer-values-in-various-types.64bit.stderr b/src/test/ui/consts/const-eval/const-pointer-values-in-various-types.64bit.stderr index b7b00f7d7..12d5b7bd6 100644 --- a/src/test/ui/consts/const-eval/const-pointer-values-in-various-types.64bit.stderr +++ b/src/test/ui/consts/const-eval/const-pointer-values-in-various-types.64bit.stderr @@ -54,19 +54,14 @@ LL | const I32_REF_U64_UNION: u64 = unsafe { Nonsense { int_32_ref: &3 }.uin = help: this code performed an operation that depends on the underlying bytes representing a pointer = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported -error[E0080]: it is undefined behavior to use this value - --> $DIR/const-pointer-values-in-various-types.rs:46:5 +error[E0080]: evaluation of constant value failed + --> $DIR/const-pointer-values-in-various-types.rs:46:47 | LL | const I32_REF_U128_UNION: u128 = unsafe { Nonsense { int_32_ref: &3 }.uint_128 }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized bytes, but expected initialized bytes - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 16, align: 8) { - __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:49:43 + --> $DIR/const-pointer-values-in-various-types.rs:50:43 | LL | const I32_REF_I8_UNION: i8 = unsafe { Nonsense { int_32_ref: &3 }.int_8 }; | -------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -77,7 +72,7 @@ LL | const I32_REF_I8_UNION: i8 = unsafe { Nonsense { int_32_ref: &3 }.int_8 = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:53:45 + --> $DIR/const-pointer-values-in-various-types.rs:54:45 | LL | const I32_REF_I16_UNION: i16 = unsafe { Nonsense { int_32_ref: &3 }.int_16 }; | ---------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -88,7 +83,7 @@ LL | const I32_REF_I16_UNION: i16 = unsafe { Nonsense { int_32_ref: &3 }.int = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:57:45 + --> $DIR/const-pointer-values-in-various-types.rs:58:45 | LL | const I32_REF_I32_UNION: i32 = unsafe { Nonsense { int_32_ref: &3 }.int_32 }; | ---------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -99,7 +94,7 @@ LL | const I32_REF_I32_UNION: i32 = unsafe { Nonsense { int_32_ref: &3 }.int = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:61:45 + --> $DIR/const-pointer-values-in-various-types.rs:62:45 | LL | const I32_REF_I64_UNION: i64 = unsafe { Nonsense { int_32_ref: &3 }.int_64 }; | ---------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -109,19 +104,14 @@ LL | const I32_REF_I64_UNION: i64 = unsafe { Nonsense { int_32_ref: &3 }.int = help: this code performed an operation that depends on the underlying bytes representing a pointer = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported -error[E0080]: it is undefined behavior to use this value - --> $DIR/const-pointer-values-in-various-types.rs:65:5 +error[E0080]: evaluation of constant value failed + --> $DIR/const-pointer-values-in-various-types.rs:66:47 | LL | const I32_REF_I128_UNION: i128 = unsafe { Nonsense { int_32_ref: &3 }.int_128 }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized bytes, but expected initialized bytes - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 16, align: 8) { - __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:68:45 + --> $DIR/const-pointer-values-in-various-types.rs:70:45 | LL | const I32_REF_F32_UNION: f32 = unsafe { Nonsense { int_32_ref: &3 }.float_32 }; | ---------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -132,7 +122,7 @@ LL | const I32_REF_F32_UNION: f32 = unsafe { Nonsense { int_32_ref: &3 }.flo = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:72:45 + --> $DIR/const-pointer-values-in-various-types.rs:74:45 | LL | const I32_REF_F64_UNION: f64 = unsafe { Nonsense { int_32_ref: &3 }.float_64 }; | ---------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -143,7 +133,7 @@ LL | const I32_REF_F64_UNION: f64 = unsafe { Nonsense { int_32_ref: &3 }.flo = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:76:47 + --> $DIR/const-pointer-values-in-various-types.rs:78:47 | LL | const I32_REF_BOOL_UNION: bool = unsafe { Nonsense { int_32_ref: &3 }.truthy_falsey }; | ------------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -154,7 +144,7 @@ LL | const I32_REF_BOOL_UNION: bool = unsafe { Nonsense { int_32_ref: &3 }.t = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:80:47 + --> $DIR/const-pointer-values-in-various-types.rs:82:47 | LL | const I32_REF_CHAR_UNION: char = unsafe { Nonsense { int_32_ref: &3 }.character }; | ------------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -165,7 +155,7 @@ LL | const I32_REF_CHAR_UNION: char = unsafe { Nonsense { int_32_ref: &3 }.c = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:84:39 + --> $DIR/const-pointer-values-in-various-types.rs:86:39 | LL | const STR_U8_UNION: u8 = unsafe { Nonsense { stringy: "3" }.uint_8 }; | ---------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -176,7 +166,7 @@ LL | const STR_U8_UNION: u8 = unsafe { Nonsense { stringy: "3" }.uint_8 }; = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:88:41 + --> $DIR/const-pointer-values-in-various-types.rs:90:41 | LL | const STR_U16_UNION: u16 = unsafe { Nonsense { stringy: "3" }.uint_16 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -187,7 +177,7 @@ LL | const STR_U16_UNION: u16 = unsafe { Nonsense { stringy: "3" }.uint_16 } = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:92:41 + --> $DIR/const-pointer-values-in-various-types.rs:94:41 | LL | const STR_U32_UNION: u32 = unsafe { Nonsense { stringy: "3" }.uint_32 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -198,7 +188,7 @@ LL | const STR_U32_UNION: u32 = unsafe { Nonsense { stringy: "3" }.uint_32 } = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:96:41 + --> $DIR/const-pointer-values-in-various-types.rs:98:41 | LL | const STR_U64_UNION: u64 = unsafe { Nonsense { stringy: "3" }.uint_64 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -209,7 +199,7 @@ LL | const STR_U64_UNION: u64 = unsafe { Nonsense { stringy: "3" }.uint_64 } = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:100:43 + --> $DIR/const-pointer-values-in-various-types.rs:102:43 | LL | const STR_U128_UNION: u128 = unsafe { Nonsense { stringy: "3" }.uint_128 }; | -------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -220,7 +210,7 @@ LL | const STR_U128_UNION: u128 = unsafe { Nonsense { stringy: "3" }.uint_12 = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:104:39 + --> $DIR/const-pointer-values-in-various-types.rs:106:39 | LL | const STR_I8_UNION: i8 = unsafe { Nonsense { stringy: "3" }.int_8 }; | ---------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -231,7 +221,7 @@ LL | const STR_I8_UNION: i8 = unsafe { Nonsense { stringy: "3" }.int_8 }; = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:108:41 + --> $DIR/const-pointer-values-in-various-types.rs:110:41 | LL | const STR_I16_UNION: i16 = unsafe { Nonsense { stringy: "3" }.int_16 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -242,7 +232,7 @@ LL | const STR_I16_UNION: i16 = unsafe { Nonsense { stringy: "3" }.int_16 }; = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:112:41 + --> $DIR/const-pointer-values-in-various-types.rs:114:41 | LL | const STR_I32_UNION: i32 = unsafe { Nonsense { stringy: "3" }.int_32 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -253,7 +243,7 @@ LL | const STR_I32_UNION: i32 = unsafe { Nonsense { stringy: "3" }.int_32 }; = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:116:41 + --> $DIR/const-pointer-values-in-various-types.rs:118:41 | LL | const STR_I64_UNION: i64 = unsafe { Nonsense { stringy: "3" }.int_64 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -264,7 +254,7 @@ LL | const STR_I64_UNION: i64 = unsafe { Nonsense { stringy: "3" }.int_64 }; = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:120:43 + --> $DIR/const-pointer-values-in-various-types.rs:122:43 | LL | const STR_I128_UNION: i128 = unsafe { Nonsense { stringy: "3" }.int_128 }; | -------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -275,7 +265,7 @@ LL | const STR_I128_UNION: i128 = unsafe { Nonsense { stringy: "3" }.int_128 = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:124:41 + --> $DIR/const-pointer-values-in-various-types.rs:126:41 | LL | const STR_F32_UNION: f32 = unsafe { Nonsense { stringy: "3" }.float_32 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -286,7 +276,7 @@ LL | const STR_F32_UNION: f32 = unsafe { Nonsense { stringy: "3" }.float_32 = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:128:41 + --> $DIR/const-pointer-values-in-various-types.rs:130:41 | LL | const STR_F64_UNION: f64 = unsafe { Nonsense { stringy: "3" }.float_64 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -297,7 +287,7 @@ LL | const STR_F64_UNION: f64 = unsafe { Nonsense { stringy: "3" }.float_64 = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:132:43 + --> $DIR/const-pointer-values-in-various-types.rs:134:43 | LL | const STR_BOOL_UNION: bool = unsafe { Nonsense { stringy: "3" }.truthy_falsey }; | -------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -308,7 +298,7 @@ LL | const STR_BOOL_UNION: bool = unsafe { Nonsense { stringy: "3" }.truthy_ = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:136:43 + --> $DIR/const-pointer-values-in-various-types.rs:138:43 | LL | const STR_CHAR_UNION: char = unsafe { Nonsense { stringy: "3" }.character }; | -------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -388,7 +378,7 @@ LL | const I32_REF_U64_UNION: u64 = unsafe { Nonsense { int_32_ref: &3 }.uin Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:49:43 + --> $DIR/const-pointer-values-in-various-types.rs:50:43 | LL | const I32_REF_I8_UNION: i8 = unsafe { Nonsense { int_32_ref: &3 }.int_8 }; | -------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -401,7 +391,7 @@ LL | const I32_REF_I8_UNION: i8 = unsafe { Nonsense { int_32_ref: &3 }.int_8 Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:53:45 + --> $DIR/const-pointer-values-in-various-types.rs:54:45 | LL | const I32_REF_I16_UNION: i16 = unsafe { Nonsense { int_32_ref: &3 }.int_16 }; | ---------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -414,7 +404,7 @@ LL | const I32_REF_I16_UNION: i16 = unsafe { Nonsense { int_32_ref: &3 }.int Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:57:45 + --> $DIR/const-pointer-values-in-various-types.rs:58:45 | LL | const I32_REF_I32_UNION: i32 = unsafe { Nonsense { int_32_ref: &3 }.int_32 }; | ---------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -427,7 +417,7 @@ LL | const I32_REF_I32_UNION: i32 = unsafe { Nonsense { int_32_ref: &3 }.int Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:61:45 + --> $DIR/const-pointer-values-in-various-types.rs:62:45 | LL | const I32_REF_I64_UNION: i64 = unsafe { Nonsense { int_32_ref: &3 }.int_64 }; | ---------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -440,7 +430,7 @@ LL | const I32_REF_I64_UNION: i64 = unsafe { Nonsense { int_32_ref: &3 }.int Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:68:45 + --> $DIR/const-pointer-values-in-various-types.rs:70:45 | LL | const I32_REF_F32_UNION: f32 = unsafe { Nonsense { int_32_ref: &3 }.float_32 }; | ---------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -453,7 +443,7 @@ LL | const I32_REF_F32_UNION: f32 = unsafe { Nonsense { int_32_ref: &3 }.flo Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:72:45 + --> $DIR/const-pointer-values-in-various-types.rs:74:45 | LL | const I32_REF_F64_UNION: f64 = unsafe { Nonsense { int_32_ref: &3 }.float_64 }; | ---------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -466,7 +456,7 @@ LL | const I32_REF_F64_UNION: f64 = unsafe { Nonsense { int_32_ref: &3 }.flo Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:76:47 + --> $DIR/const-pointer-values-in-various-types.rs:78:47 | LL | const I32_REF_BOOL_UNION: bool = unsafe { Nonsense { int_32_ref: &3 }.truthy_falsey }; | ------------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -479,7 +469,7 @@ LL | const I32_REF_BOOL_UNION: bool = unsafe { Nonsense { int_32_ref: &3 }.t Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:80:47 + --> $DIR/const-pointer-values-in-various-types.rs:82:47 | LL | const I32_REF_CHAR_UNION: char = unsafe { Nonsense { int_32_ref: &3 }.character }; | ------------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -492,7 +482,7 @@ LL | const I32_REF_CHAR_UNION: char = unsafe { Nonsense { int_32_ref: &3 }.c Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:84:39 + --> $DIR/const-pointer-values-in-various-types.rs:86:39 | LL | const STR_U8_UNION: u8 = unsafe { Nonsense { stringy: "3" }.uint_8 }; | ---------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -505,7 +495,7 @@ LL | const STR_U8_UNION: u8 = unsafe { Nonsense { stringy: "3" }.uint_8 }; Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:88:41 + --> $DIR/const-pointer-values-in-various-types.rs:90:41 | LL | const STR_U16_UNION: u16 = unsafe { Nonsense { stringy: "3" }.uint_16 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -518,7 +508,7 @@ LL | const STR_U16_UNION: u16 = unsafe { Nonsense { stringy: "3" }.uint_16 } Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:92:41 + --> $DIR/const-pointer-values-in-various-types.rs:94:41 | LL | const STR_U32_UNION: u32 = unsafe { Nonsense { stringy: "3" }.uint_32 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -531,7 +521,7 @@ LL | const STR_U32_UNION: u32 = unsafe { Nonsense { stringy: "3" }.uint_32 } Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:96:41 + --> $DIR/const-pointer-values-in-various-types.rs:98:41 | LL | const STR_U64_UNION: u64 = unsafe { Nonsense { stringy: "3" }.uint_64 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -544,7 +534,7 @@ LL | const STR_U64_UNION: u64 = unsafe { Nonsense { stringy: "3" }.uint_64 } Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:100:43 + --> $DIR/const-pointer-values-in-various-types.rs:102:43 | LL | const STR_U128_UNION: u128 = unsafe { Nonsense { stringy: "3" }.uint_128 }; | -------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -557,7 +547,7 @@ LL | const STR_U128_UNION: u128 = unsafe { Nonsense { stringy: "3" }.uint_12 Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:104:39 + --> $DIR/const-pointer-values-in-various-types.rs:106:39 | LL | const STR_I8_UNION: i8 = unsafe { Nonsense { stringy: "3" }.int_8 }; | ---------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -570,7 +560,7 @@ LL | const STR_I8_UNION: i8 = unsafe { Nonsense { stringy: "3" }.int_8 }; Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:108:41 + --> $DIR/const-pointer-values-in-various-types.rs:110:41 | LL | const STR_I16_UNION: i16 = unsafe { Nonsense { stringy: "3" }.int_16 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -583,7 +573,7 @@ LL | const STR_I16_UNION: i16 = unsafe { Nonsense { stringy: "3" }.int_16 }; Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:112:41 + --> $DIR/const-pointer-values-in-various-types.rs:114:41 | LL | const STR_I32_UNION: i32 = unsafe { Nonsense { stringy: "3" }.int_32 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -596,7 +586,7 @@ LL | const STR_I32_UNION: i32 = unsafe { Nonsense { stringy: "3" }.int_32 }; Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:116:41 + --> $DIR/const-pointer-values-in-various-types.rs:118:41 | LL | const STR_I64_UNION: i64 = unsafe { Nonsense { stringy: "3" }.int_64 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -609,7 +599,7 @@ LL | const STR_I64_UNION: i64 = unsafe { Nonsense { stringy: "3" }.int_64 }; Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:120:43 + --> $DIR/const-pointer-values-in-various-types.rs:122:43 | LL | const STR_I128_UNION: i128 = unsafe { Nonsense { stringy: "3" }.int_128 }; | -------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -622,7 +612,7 @@ LL | const STR_I128_UNION: i128 = unsafe { Nonsense { stringy: "3" }.int_128 Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:124:41 + --> $DIR/const-pointer-values-in-various-types.rs:126:41 | LL | const STR_F32_UNION: f32 = unsafe { Nonsense { stringy: "3" }.float_32 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -635,7 +625,7 @@ LL | const STR_F32_UNION: f32 = unsafe { Nonsense { stringy: "3" }.float_32 Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:128:41 + --> $DIR/const-pointer-values-in-various-types.rs:130:41 | LL | const STR_F64_UNION: f64 = unsafe { Nonsense { stringy: "3" }.float_64 }; | ------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -648,7 +638,7 @@ LL | const STR_F64_UNION: f64 = unsafe { Nonsense { stringy: "3" }.float_64 Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:132:43 + --> $DIR/const-pointer-values-in-various-types.rs:134:43 | LL | const STR_BOOL_UNION: bool = unsafe { Nonsense { stringy: "3" }.truthy_falsey }; | -------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -661,7 +651,7 @@ LL | const STR_BOOL_UNION: bool = unsafe { Nonsense { stringy: "3" }.truthy_ Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/const-pointer-values-in-various-types.rs:136:43 + --> $DIR/const-pointer-values-in-various-types.rs:138:43 | LL | const STR_CHAR_UNION: char = unsafe { Nonsense { stringy: "3" }.character }; | -------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes diff --git a/src/test/ui/consts/const-eval/const-pointer-values-in-various-types.rs b/src/test/ui/consts/const-eval/const-pointer-values-in-various-types.rs index f10a67392..f6a5e4d3c 100644 --- a/src/test/ui/consts/const-eval/const-pointer-values-in-various-types.rs +++ b/src/test/ui/consts/const-eval/const-pointer-values-in-various-types.rs @@ -44,7 +44,8 @@ fn main() { //~| WARN this was previously accepted by the compiler but is being phased out const I32_REF_U128_UNION: u128 = unsafe { Nonsense { int_32_ref: &3 }.uint_128 }; - //~^ ERROR it is undefined behavior to use this value + //~^ ERROR evaluation of constant value failed + //~| uninitialized const I32_REF_I8_UNION: i8 = unsafe { Nonsense { int_32_ref: &3 }.int_8 }; //~^ ERROR any use of this value will cause an error @@ -63,7 +64,8 @@ fn main() { //~| WARN this was previously accepted by the compiler but is being phased out const I32_REF_I128_UNION: i128 = unsafe { Nonsense { int_32_ref: &3 }.int_128 }; - //~^ ERROR it is undefined behavior to use this value + //~^ ERROR evaluation of constant value failed + //~| uninitialized const I32_REF_F32_UNION: f32 = unsafe { Nonsense { int_32_ref: &3 }.float_32 }; //~^ ERROR any use of this value will cause an error diff --git a/src/test/ui/consts/const-eval/heap/alloc_intrinsic_uninit.32bit.stderr b/src/test/ui/consts/const-eval/heap/alloc_intrinsic_uninit.32bit.stderr index f1a780926..a0f4519ea 100644 --- a/src/test/ui/consts/const-eval/heap/alloc_intrinsic_uninit.32bit.stderr +++ b/src/test/ui/consts/const-eval/heap/alloc_intrinsic_uninit.32bit.stderr @@ -2,7 +2,7 @@ error[E0080]: it is undefined behavior to use this value --> $DIR/alloc_intrinsic_uninit.rs:8:1 | LL | const BAR: &i32 = unsafe { &*(intrinsics::const_allocate(4, 4) as *mut i32) }; - | ^^^^^^^^^^^^^^^ constructing invalid value at .<deref>: encountered uninitialized bytes, but expected initialized bytes + | ^^^^^^^^^^^^^^^ constructing invalid value at .<deref>: encountered uninitialized memory, but expected an integer | = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. = note: the raw bytes of the constant (size: 4, align: 4) { diff --git a/src/test/ui/consts/const-eval/heap/alloc_intrinsic_uninit.64bit.stderr b/src/test/ui/consts/const-eval/heap/alloc_intrinsic_uninit.64bit.stderr index 2eb401226..d2bffa425 100644 --- a/src/test/ui/consts/const-eval/heap/alloc_intrinsic_uninit.64bit.stderr +++ b/src/test/ui/consts/const-eval/heap/alloc_intrinsic_uninit.64bit.stderr @@ -2,7 +2,7 @@ error[E0080]: it is undefined behavior to use this value --> $DIR/alloc_intrinsic_uninit.rs:8:1 | LL | const BAR: &i32 = unsafe { &*(intrinsics::const_allocate(4, 4) as *mut i32) }; - | ^^^^^^^^^^^^^^^ constructing invalid value at .<deref>: encountered uninitialized bytes, but expected initialized bytes + | ^^^^^^^^^^^^^^^ constructing invalid value at .<deref>: encountered uninitialized memory, but expected an integer | = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. = note: the raw bytes of the constant (size: 8, align: 8) { diff --git a/src/test/ui/consts/const-eval/issue-91827-extern-types.rs b/src/test/ui/consts/const-eval/issue-91827-extern-types.rs index e1f5e8ae1..43c99799f 100644 --- a/src/test/ui/consts/const-eval/issue-91827-extern-types.rs +++ b/src/test/ui/consts/const-eval/issue-91827-extern-types.rs @@ -3,7 +3,6 @@ // Test that we can handle unsized types with an extern type tail part. // Regression test for issue #91827. -#![feature(const_ptr_offset_from)] #![feature(extern_types)] use std::ptr::addr_of; diff --git a/src/test/ui/consts/const-eval/ub-enum-overwrite.rs b/src/test/ui/consts/const-eval/ub-enum-overwrite.rs index c56778492..086a1001d 100644 --- a/src/test/ui/consts/const-eval/ub-enum-overwrite.rs +++ b/src/test/ui/consts/const-eval/ub-enum-overwrite.rs @@ -6,12 +6,13 @@ enum E { } const _: u8 = { - //~^ ERROR is undefined behavior let mut e = E::A(1); let p = if let E::A(x) = &mut e { x as *mut u8 } else { unreachable!() }; // Make sure overwriting `e` uninitializes other bytes e = E::B; unsafe { *p } + //~^ ERROR evaluation of constant value failed + //~| uninitialized }; fn main() {} diff --git a/src/test/ui/consts/const-eval/ub-enum-overwrite.stderr b/src/test/ui/consts/const-eval/ub-enum-overwrite.stderr index 8560112ae..5750212b4 100644 --- a/src/test/ui/consts/const-eval/ub-enum-overwrite.stderr +++ b/src/test/ui/consts/const-eval/ub-enum-overwrite.stderr @@ -1,13 +1,8 @@ -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-enum-overwrite.rs:8:1 +error[E0080]: evaluation of constant value failed + --> $DIR/ub-enum-overwrite.rs:13:14 | -LL | const _: u8 = { - | ^^^^^^^^^^^ constructing invalid value: encountered uninitialized bytes, but expected initialized bytes - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 1, align: 1) { - __ │ ░ - } +LL | unsafe { *p } + | ^^ using uninitialized data, but this operation requires initialized memory error: aborting due to previous error diff --git a/src/test/ui/consts/const-eval/ub-enum.32bit.stderr b/src/test/ui/consts/const-eval/ub-enum.32bit.stderr index ce3bc9474..752fd01f3 100644 --- a/src/test/ui/consts/const-eval/ub-enum.32bit.stderr +++ b/src/test/ui/consts/const-eval/ub-enum.32bit.stderr @@ -65,19 +65,14 @@ LL | const BAD_ENUM2_WRAPPED: Wrap<Enum2> = unsafe { mem::transmute(&0) }; = help: this code performed an operation that depends on the underlying bytes representing a pointer = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-enum.rs:59:1 +error[E0080]: evaluation of constant value failed + --> $DIR/ub-enum.rs:59:42 | LL | const BAD_ENUM2_UNDEF : Enum2 = unsafe { MaybeUninit { uninit: () }.init }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-tag>: encountered uninitialized bytes, but expected initialized bytes - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 4, align: 4) { - __ __ __ __ │ ░░░░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error: any use of this value will cause an error - --> $DIR/ub-enum.rs:63:1 + --> $DIR/ub-enum.rs:64:1 | LL | const BAD_ENUM2_OPTION_PTR: Option<Enum2> = unsafe { mem::transmute(&0) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -88,7 +83,7 @@ LL | const BAD_ENUM2_OPTION_PTR: Option<Enum2> = unsafe { mem::transmute(&0) }; = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-enum.rs:81:1 + --> $DIR/ub-enum.rs:82:1 | LL | const BAD_UNINHABITED_VARIANT1: UninhDiscriminant = unsafe { mem::transmute(1u8) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-variant(B)>.0: encountered a value of the never type `!` @@ -99,7 +94,7 @@ LL | const BAD_UNINHABITED_VARIANT1: UninhDiscriminant = unsafe { mem::transmute } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-enum.rs:83:1 + --> $DIR/ub-enum.rs:84:1 | LL | const BAD_UNINHABITED_VARIANT2: UninhDiscriminant = unsafe { mem::transmute(3u8) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-variant(D)>.0: encountered a value of uninhabited type Never @@ -110,7 +105,7 @@ LL | const BAD_UNINHABITED_VARIANT2: UninhDiscriminant = unsafe { mem::transmute } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-enum.rs:91:1 + --> $DIR/ub-enum.rs:92:1 | LL | const BAD_OPTION_CHAR: Option<(char, char)> = Some(('x', unsafe { mem::transmute(!0u32) })); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-variant(Some)>.0.1: encountered 0xffffffff, but expected a valid unicode scalar value (in `0..=0x10FFFF` but not in `0xD800..=0xDFFF`) @@ -121,13 +116,13 @@ LL | const BAD_OPTION_CHAR: Option<(char, char)> = Some(('x', unsafe { mem::tran } error[E0080]: evaluation of constant value failed - --> $DIR/ub-enum.rs:96:77 + --> $DIR/ub-enum.rs:97:77 | LL | const BAD_UNINHABITED_WITH_DATA1: Result<(i32, Never), (i32, !)> = unsafe { mem::transmute(0u64) }; | ^^^^^^^^^^^^^^^^^^^^ transmuting to uninhabited type error[E0080]: evaluation of constant value failed - --> $DIR/ub-enum.rs:98:77 + --> $DIR/ub-enum.rs:99:77 | LL | const BAD_UNINHABITED_WITH_DATA2: Result<(i32, !), (i32, Never)> = unsafe { mem::transmute(0u64) }; | ^^^^^^^^^^^^^^^^^^^^ transmuting to uninhabited type @@ -189,7 +184,7 @@ LL | const BAD_ENUM2_WRAPPED: Wrap<Enum2> = unsafe { mem::transmute(&0) }; Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/ub-enum.rs:63:1 + --> $DIR/ub-enum.rs:64:1 | LL | const BAD_ENUM2_OPTION_PTR: Option<Enum2> = unsafe { mem::transmute(&0) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes diff --git a/src/test/ui/consts/const-eval/ub-enum.64bit.stderr b/src/test/ui/consts/const-eval/ub-enum.64bit.stderr index d8fc20c98..3f1546a27 100644 --- a/src/test/ui/consts/const-eval/ub-enum.64bit.stderr +++ b/src/test/ui/consts/const-eval/ub-enum.64bit.stderr @@ -65,19 +65,14 @@ LL | const BAD_ENUM2_WRAPPED: Wrap<Enum2> = unsafe { mem::transmute(&0) }; = help: this code performed an operation that depends on the underlying bytes representing a pointer = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-enum.rs:59:1 +error[E0080]: evaluation of constant value failed + --> $DIR/ub-enum.rs:59:42 | LL | const BAD_ENUM2_UNDEF : Enum2 = unsafe { MaybeUninit { uninit: () }.init }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-tag>: encountered uninitialized bytes, but expected initialized bytes - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 8, align: 8) { - __ __ __ __ __ __ __ __ │ ░░░░░░░░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error: any use of this value will cause an error - --> $DIR/ub-enum.rs:63:1 + --> $DIR/ub-enum.rs:64:1 | LL | const BAD_ENUM2_OPTION_PTR: Option<Enum2> = unsafe { mem::transmute(&0) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -88,7 +83,7 @@ LL | const BAD_ENUM2_OPTION_PTR: Option<Enum2> = unsafe { mem::transmute(&0) }; = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-enum.rs:81:1 + --> $DIR/ub-enum.rs:82:1 | LL | const BAD_UNINHABITED_VARIANT1: UninhDiscriminant = unsafe { mem::transmute(1u8) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-variant(B)>.0: encountered a value of the never type `!` @@ -99,7 +94,7 @@ LL | const BAD_UNINHABITED_VARIANT1: UninhDiscriminant = unsafe { mem::transmute } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-enum.rs:83:1 + --> $DIR/ub-enum.rs:84:1 | LL | const BAD_UNINHABITED_VARIANT2: UninhDiscriminant = unsafe { mem::transmute(3u8) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-variant(D)>.0: encountered a value of uninhabited type Never @@ -110,7 +105,7 @@ LL | const BAD_UNINHABITED_VARIANT2: UninhDiscriminant = unsafe { mem::transmute } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-enum.rs:91:1 + --> $DIR/ub-enum.rs:92:1 | LL | const BAD_OPTION_CHAR: Option<(char, char)> = Some(('x', unsafe { mem::transmute(!0u32) })); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<enum-variant(Some)>.0.1: encountered 0xffffffff, but expected a valid unicode scalar value (in `0..=0x10FFFF` but not in `0xD800..=0xDFFF`) @@ -121,13 +116,13 @@ LL | const BAD_OPTION_CHAR: Option<(char, char)> = Some(('x', unsafe { mem::tran } error[E0080]: evaluation of constant value failed - --> $DIR/ub-enum.rs:96:77 + --> $DIR/ub-enum.rs:97:77 | LL | const BAD_UNINHABITED_WITH_DATA1: Result<(i32, Never), (i32, !)> = unsafe { mem::transmute(0u64) }; | ^^^^^^^^^^^^^^^^^^^^ transmuting to uninhabited type error[E0080]: evaluation of constant value failed - --> $DIR/ub-enum.rs:98:77 + --> $DIR/ub-enum.rs:99:77 | LL | const BAD_UNINHABITED_WITH_DATA2: Result<(i32, !), (i32, Never)> = unsafe { mem::transmute(0u64) }; | ^^^^^^^^^^^^^^^^^^^^ transmuting to uninhabited type @@ -189,7 +184,7 @@ LL | const BAD_ENUM2_WRAPPED: Wrap<Enum2> = unsafe { mem::transmute(&0) }; Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/ub-enum.rs:63:1 + --> $DIR/ub-enum.rs:64:1 | LL | const BAD_ENUM2_OPTION_PTR: Option<Enum2> = unsafe { mem::transmute(&0) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes diff --git a/src/test/ui/consts/const-eval/ub-enum.rs b/src/test/ui/consts/const-eval/ub-enum.rs index d8d2a499b..d8dc6d057 100644 --- a/src/test/ui/consts/const-eval/ub-enum.rs +++ b/src/test/ui/consts/const-eval/ub-enum.rs @@ -57,7 +57,8 @@ union MaybeUninit<T: Copy> { init: T, } const BAD_ENUM2_UNDEF : Enum2 = unsafe { MaybeUninit { uninit: () }.init }; -//~^ ERROR is undefined behavior +//~^ ERROR evaluation of constant value failed +//~| uninitialized // Pointer value in an enum with a niche that is not just 0. const BAD_ENUM2_OPTION_PTR: Option<Enum2> = unsafe { mem::transmute(&0) }; @@ -92,7 +93,7 @@ const BAD_OPTION_CHAR: Option<(char, char)> = Some(('x', unsafe { mem::transmute //~^ ERROR is undefined behavior // All variants are uninhabited but also have data. -// Use `0` as constant to make behavior endianess-independent. +// Use `0` as constant to make behavior endianness-independent. const BAD_UNINHABITED_WITH_DATA1: Result<(i32, Never), (i32, !)> = unsafe { mem::transmute(0u64) }; //~^ ERROR evaluation of constant value failed const BAD_UNINHABITED_WITH_DATA2: Result<(i32, !), (i32, Never)> = unsafe { mem::transmute(0u64) }; diff --git a/src/test/ui/consts/const-eval/ub-int-array.32bit.stderr b/src/test/ui/consts/const-eval/ub-int-array.32bit.stderr index 8eece9e30..6100a98d1 100644 --- a/src/test/ui/consts/const-eval/ub-int-array.32bit.stderr +++ b/src/test/ui/consts/const-eval/ub-int-array.32bit.stderr @@ -1,35 +1,20 @@ -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-int-array.rs:14:1 +error[E0080]: evaluation of constant value failed + --> $DIR/ub-int-array.rs:16:9 | -LL | const UNINIT_INT_0: [u32; 3] = unsafe { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at [0]: encountered uninitialized bytes - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 12, align: 4) { - __ __ __ __ 01 00 00 00 02 00 00 00 │ ░░░░........ - } +LL | MaybeUninit { uninit: () }.init, + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-int-array.rs:23:1 - | -LL | const UNINIT_INT_1: [u32; 3] = unsafe { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at [1]: encountered uninitialized bytes +error[E0080]: evaluation of constant value failed + --> $DIR/ub-int-array.rs:31:13 | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 12, align: 4) { - 00 00 00 00 01 __ 01 01 02 02 __ 02 │ .....░....░. - } +LL | MaybeUninit { uninit: () }.init, + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-int-array.rs:43:1 - | -LL | const UNINIT_INT_2: [u32; 3] = unsafe { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at [2]: encountered uninitialized bytes +error[E0080]: evaluation of constant value failed + --> $DIR/ub-int-array.rs:57:13 | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 12, align: 4) { - 00 00 00 00 01 01 01 01 02 02 02 __ │ ...........░ - } +LL | MaybeUninit { uninit: () }.init, + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error: aborting due to 3 previous errors diff --git a/src/test/ui/consts/const-eval/ub-int-array.64bit.stderr b/src/test/ui/consts/const-eval/ub-int-array.64bit.stderr index 8eece9e30..6100a98d1 100644 --- a/src/test/ui/consts/const-eval/ub-int-array.64bit.stderr +++ b/src/test/ui/consts/const-eval/ub-int-array.64bit.stderr @@ -1,35 +1,20 @@ -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-int-array.rs:14:1 +error[E0080]: evaluation of constant value failed + --> $DIR/ub-int-array.rs:16:9 | -LL | const UNINIT_INT_0: [u32; 3] = unsafe { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at [0]: encountered uninitialized bytes - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 12, align: 4) { - __ __ __ __ 01 00 00 00 02 00 00 00 │ ░░░░........ - } +LL | MaybeUninit { uninit: () }.init, + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-int-array.rs:23:1 - | -LL | const UNINIT_INT_1: [u32; 3] = unsafe { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at [1]: encountered uninitialized bytes +error[E0080]: evaluation of constant value failed + --> $DIR/ub-int-array.rs:31:13 | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 12, align: 4) { - 00 00 00 00 01 __ 01 01 02 02 __ 02 │ .....░....░. - } +LL | MaybeUninit { uninit: () }.init, + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-int-array.rs:43:1 - | -LL | const UNINIT_INT_2: [u32; 3] = unsafe { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at [2]: encountered uninitialized bytes +error[E0080]: evaluation of constant value failed + --> $DIR/ub-int-array.rs:57:13 | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 12, align: 4) { - 00 00 00 00 01 01 01 01 02 02 02 __ │ ...........░ - } +LL | MaybeUninit { uninit: () }.init, + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error: aborting due to 3 previous errors diff --git a/src/test/ui/consts/const-eval/ub-int-array.rs b/src/test/ui/consts/const-eval/ub-int-array.rs index 1221f71d1..cb85e3b01 100644 --- a/src/test/ui/consts/const-eval/ub-int-array.rs +++ b/src/test/ui/consts/const-eval/ub-int-array.rs @@ -12,17 +12,15 @@ union MaybeUninit<T: Copy> { } const UNINIT_INT_0: [u32; 3] = unsafe { -//~^ ERROR it is undefined behavior to use this value -//~| constructing invalid value at [0]: encountered uninitialized bytes [ MaybeUninit { uninit: () }.init, + //~^ ERROR evaluation of constant value failed + //~| uninitialized 1, 2, ] }; const UNINIT_INT_1: [u32; 3] = unsafe { -//~^ ERROR it is undefined behavior to use this value -//~| constructing invalid value at [1]: encountered uninitialized bytes mem::transmute( [ 0u8, @@ -31,6 +29,8 @@ const UNINIT_INT_1: [u32; 3] = unsafe { 0u8, 1u8, MaybeUninit { uninit: () }.init, + //~^ ERROR evaluation of constant value failed + //~| uninitialized 1u8, 1u8, 2u8, @@ -41,8 +41,6 @@ const UNINIT_INT_1: [u32; 3] = unsafe { ) }; const UNINIT_INT_2: [u32; 3] = unsafe { -//~^ ERROR it is undefined behavior to use this value -//~| constructing invalid value at [2]: encountered uninitialized bytes mem::transmute( [ 0u8, @@ -57,6 +55,8 @@ const UNINIT_INT_2: [u32; 3] = unsafe { 2u8, 2u8, MaybeUninit { uninit: () }.init, + //~^ ERROR evaluation of constant value failed + //~| uninitialized ] ) }; diff --git a/src/test/ui/consts/const-eval/ub-nonnull.32bit.stderr b/src/test/ui/consts/const-eval/ub-nonnull.32bit.stderr index d450a814c..693c0e99b 100644 --- a/src/test/ui/consts/const-eval/ub-nonnull.32bit.stderr +++ b/src/test/ui/consts/const-eval/ub-nonnull.32bit.stderr @@ -37,19 +37,14 @@ LL | const NULL_USIZE: NonZeroUsize = unsafe { mem::transmute(0usize) }; 00 00 00 00 │ .... } -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-nonnull.rs:33:1 +error[E0080]: evaluation of constant value failed + --> $DIR/ub-nonnull.rs:33:36 | LL | const UNINIT: NonZeroU8 = unsafe { MaybeUninit { uninit: () }.init }; - | ^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .0: encountered uninitialized bytes, but expected initialized bytes - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 1, align: 1) { - __ │ ░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-nonnull.rs:41:1 + --> $DIR/ub-nonnull.rs:42:1 | LL | const BAD_RANGE1: RestrictedRange1 = unsafe { RestrictedRange1(42) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered 42, but expected something in the range 10..=30 @@ -60,7 +55,7 @@ LL | const BAD_RANGE1: RestrictedRange1 = unsafe { RestrictedRange1(42) }; } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-nonnull.rs:47:1 + --> $DIR/ub-nonnull.rs:48:1 | LL | const BAD_RANGE2: RestrictedRange2 = unsafe { RestrictedRange2(20) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered 20, but expected something less or equal to 10, or greater or equal to 30 diff --git a/src/test/ui/consts/const-eval/ub-nonnull.64bit.stderr b/src/test/ui/consts/const-eval/ub-nonnull.64bit.stderr index ed0d91aab..d22191213 100644 --- a/src/test/ui/consts/const-eval/ub-nonnull.64bit.stderr +++ b/src/test/ui/consts/const-eval/ub-nonnull.64bit.stderr @@ -37,19 +37,14 @@ LL | const NULL_USIZE: NonZeroUsize = unsafe { mem::transmute(0usize) }; 00 00 00 00 00 00 00 00 │ ........ } -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-nonnull.rs:33:1 +error[E0080]: evaluation of constant value failed + --> $DIR/ub-nonnull.rs:33:36 | LL | const UNINIT: NonZeroU8 = unsafe { MaybeUninit { uninit: () }.init }; - | ^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .0: encountered uninitialized bytes, but expected initialized bytes - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 1, align: 1) { - __ │ ░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-nonnull.rs:41:1 + --> $DIR/ub-nonnull.rs:42:1 | LL | const BAD_RANGE1: RestrictedRange1 = unsafe { RestrictedRange1(42) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered 42, but expected something in the range 10..=30 @@ -60,7 +55,7 @@ LL | const BAD_RANGE1: RestrictedRange1 = unsafe { RestrictedRange1(42) }; } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-nonnull.rs:47:1 + --> $DIR/ub-nonnull.rs:48:1 | LL | const BAD_RANGE2: RestrictedRange2 = unsafe { RestrictedRange2(20) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered 20, but expected something less or equal to 10, or greater or equal to 30 diff --git a/src/test/ui/consts/const-eval/ub-nonnull.rs b/src/test/ui/consts/const-eval/ub-nonnull.rs index 259707b80..777c6d988 100644 --- a/src/test/ui/consts/const-eval/ub-nonnull.rs +++ b/src/test/ui/consts/const-eval/ub-nonnull.rs @@ -31,7 +31,8 @@ union MaybeUninit<T: Copy> { init: T, } const UNINIT: NonZeroU8 = unsafe { MaybeUninit { uninit: () }.init }; -//~^ ERROR it is undefined behavior to use this value +//~^ ERROR evaluation of constant value failed +//~| uninitialized // Also test other uses of rustc_layout_scalar_valid_range_start diff --git a/src/test/ui/consts/const-eval/ub-ref-ptr.32bit.stderr b/src/test/ui/consts/const-eval/ub-ref-ptr.32bit.stderr index e86b37929..3e93219c8 100644 --- a/src/test/ui/consts/const-eval/ub-ref-ptr.32bit.stderr +++ b/src/test/ui/consts/const-eval/ub-ref-ptr.32bit.stderr @@ -116,19 +116,14 @@ LL | const USIZE_AS_BOX: Box<u8> = unsafe { mem::transmute(1337usize) }; 39 05 00 00 │ 9... } -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-ref-ptr.rs:53:1 +error[E0080]: evaluation of constant value failed + --> $DIR/ub-ref-ptr.rs:53:41 | LL | const UNINIT_PTR: *const i32 = unsafe { MaybeUninit { uninit: () }.init }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized raw pointer - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 4, align: 4) { - __ __ __ __ │ ░░░░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-ref-ptr.rs:56:1 + --> $DIR/ub-ref-ptr.rs:57:1 | LL | const NULL_FN_PTR: fn() = unsafe { mem::transmute(0usize) }; | ^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered null pointer, but expected a function pointer @@ -138,19 +133,14 @@ LL | const NULL_FN_PTR: fn() = unsafe { mem::transmute(0usize) }; 00 00 00 00 │ .... } -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-ref-ptr.rs:58:1 +error[E0080]: evaluation of constant value failed + --> $DIR/ub-ref-ptr.rs:59:38 | LL | const UNINIT_FN_PTR: fn() = unsafe { MaybeUninit { uninit: () }.init }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized bytes, but expected a proper pointer or integer value - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 4, align: 4) { - __ __ __ __ │ ░░░░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-ref-ptr.rs:60:1 + --> $DIR/ub-ref-ptr.rs:62:1 | LL | const DANGLING_FN_PTR: fn() = unsafe { mem::transmute(13usize) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered 0xd[noalloc], but expected a function pointer @@ -161,7 +151,7 @@ LL | const DANGLING_FN_PTR: fn() = unsafe { mem::transmute(13usize) }; } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-ref-ptr.rs:62:1 + --> $DIR/ub-ref-ptr.rs:64:1 | LL | const DATA_FN_PTR: fn() = unsafe { mem::transmute(&13) }; | ^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered alloc41, but expected a function pointer diff --git a/src/test/ui/consts/const-eval/ub-ref-ptr.64bit.stderr b/src/test/ui/consts/const-eval/ub-ref-ptr.64bit.stderr index eeec2dc4b..bc2aa12a2 100644 --- a/src/test/ui/consts/const-eval/ub-ref-ptr.64bit.stderr +++ b/src/test/ui/consts/const-eval/ub-ref-ptr.64bit.stderr @@ -116,19 +116,14 @@ LL | const USIZE_AS_BOX: Box<u8> = unsafe { mem::transmute(1337usize) }; 39 05 00 00 00 00 00 00 │ 9....... } -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-ref-ptr.rs:53:1 +error[E0080]: evaluation of constant value failed + --> $DIR/ub-ref-ptr.rs:53:41 | LL | const UNINIT_PTR: *const i32 = unsafe { MaybeUninit { uninit: () }.init }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized raw pointer - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 8, align: 8) { - __ __ __ __ __ __ __ __ │ ░░░░░░░░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-ref-ptr.rs:56:1 + --> $DIR/ub-ref-ptr.rs:57:1 | LL | const NULL_FN_PTR: fn() = unsafe { mem::transmute(0usize) }; | ^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered null pointer, but expected a function pointer @@ -138,19 +133,14 @@ LL | const NULL_FN_PTR: fn() = unsafe { mem::transmute(0usize) }; 00 00 00 00 00 00 00 00 │ ........ } -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-ref-ptr.rs:58:1 +error[E0080]: evaluation of constant value failed + --> $DIR/ub-ref-ptr.rs:59:38 | LL | const UNINIT_FN_PTR: fn() = unsafe { MaybeUninit { uninit: () }.init }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized bytes, but expected a proper pointer or integer value - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 8, align: 8) { - __ __ __ __ __ __ __ __ │ ░░░░░░░░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-ref-ptr.rs:60:1 + --> $DIR/ub-ref-ptr.rs:62:1 | LL | const DANGLING_FN_PTR: fn() = unsafe { mem::transmute(13usize) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered 0xd[noalloc], but expected a function pointer @@ -161,7 +151,7 @@ LL | const DANGLING_FN_PTR: fn() = unsafe { mem::transmute(13usize) }; } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-ref-ptr.rs:62:1 + --> $DIR/ub-ref-ptr.rs:64:1 | LL | const DATA_FN_PTR: fn() = unsafe { mem::transmute(&13) }; | ^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered alloc41, but expected a function pointer diff --git a/src/test/ui/consts/const-eval/ub-ref-ptr.rs b/src/test/ui/consts/const-eval/ub-ref-ptr.rs index d0216f746..c62848f70 100644 --- a/src/test/ui/consts/const-eval/ub-ref-ptr.rs +++ b/src/test/ui/consts/const-eval/ub-ref-ptr.rs @@ -51,12 +51,14 @@ const USIZE_AS_BOX: Box<u8> = unsafe { mem::transmute(1337usize) }; //~^ ERROR it is undefined behavior to use this value const UNINIT_PTR: *const i32 = unsafe { MaybeUninit { uninit: () }.init }; -//~^ ERROR it is undefined behavior to use this value +//~^ ERROR evaluation of constant value failed +//~| uninitialized const NULL_FN_PTR: fn() = unsafe { mem::transmute(0usize) }; //~^ ERROR it is undefined behavior to use this value const UNINIT_FN_PTR: fn() = unsafe { MaybeUninit { uninit: () }.init }; -//~^ ERROR it is undefined behavior to use this value +//~^ ERROR evaluation of constant value failed +//~| uninitialized const DANGLING_FN_PTR: fn() = unsafe { mem::transmute(13usize) }; //~^ ERROR it is undefined behavior to use this value const DATA_FN_PTR: fn() = unsafe { mem::transmute(&13) }; diff --git a/src/test/ui/consts/const-eval/ub-wide-ptr.32bit.stderr b/src/test/ui/consts/const-eval/ub-wide-ptr.32bit.stderr index c4f0e3ab4..4cd974e7b 100644 --- a/src/test/ui/consts/const-eval/ub-wide-ptr.32bit.stderr +++ b/src/test/ui/consts/const-eval/ub-wide-ptr.32bit.stderr @@ -76,19 +76,14 @@ LL | const MYSTR_NO_INIT: &MyStr = unsafe { mem::transmute::<&[_], _>(&[MaybeUni ╾─allocN─╼ 01 00 00 00 │ ╾──╼.... } -error[E0080]: it is undefined behavior to use this value +error[E0080]: evaluation of constant value failed --> $DIR/ub-wide-ptr.rs:63:1 | LL | const SLICE_LENGTH_UNINIT: &[u8] = unsafe { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized reference - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 8, align: 4) { - 2a 00 00 00 __ __ __ __ │ *...░░░░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:69:1 + --> $DIR/ub-wide-ptr.rs:70:1 | LL | const SLICE_TOO_LONG: &[u8] = unsafe { mem::transmute((&42u8, 999usize)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered a dangling reference (going beyond the bounds of its allocation) @@ -99,7 +94,7 @@ LL | const SLICE_TOO_LONG: &[u8] = unsafe { mem::transmute((&42u8, 999usize)) }; } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:72:1 + --> $DIR/ub-wide-ptr.rs:73:1 | LL | const SLICE_TOO_LONG_OVERFLOW: &[u32] = unsafe { mem::transmute((&42u32, isize::MAX)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered invalid reference metadata: slice is bigger than largest supported object @@ -110,7 +105,7 @@ LL | const SLICE_TOO_LONG_OVERFLOW: &[u32] = unsafe { mem::transmute((&42u32, is } error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:75:1 + --> $DIR/ub-wide-ptr.rs:76:1 | LL | const SLICE_LENGTH_PTR: &[u8] = unsafe { mem::transmute((&42u8, &3)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -121,7 +116,7 @@ LL | const SLICE_LENGTH_PTR: &[u8] = unsafe { mem::transmute((&42u8, &3)) }; = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:79:1 + --> $DIR/ub-wide-ptr.rs:80:1 | LL | const SLICE_TOO_LONG_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, 999usize)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered a dangling box (going beyond the bounds of its allocation) @@ -132,7 +127,7 @@ LL | const SLICE_TOO_LONG_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, 999us } error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:82:1 + --> $DIR/ub-wide-ptr.rs:83:1 | LL | const SLICE_LENGTH_PTR_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, &3)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -143,7 +138,7 @@ LL | const SLICE_LENGTH_PTR_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, &3) = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:87:1 + --> $DIR/ub-wide-ptr.rs:88:1 | LL | const SLICE_CONTENT_INVALID: &[bool] = &[unsafe { mem::transmute(3u8) }]; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<deref>[0]: encountered 0x03, but expected a boolean @@ -154,7 +149,7 @@ LL | const SLICE_CONTENT_INVALID: &[bool] = &[unsafe { mem::transmute(3u8) }]; } error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:87:40 + --> $DIR/ub-wide-ptr.rs:88:40 | LL | const SLICE_CONTENT_INVALID: &[bool] = &[unsafe { mem::transmute(3u8) }]; | ------------------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors @@ -163,7 +158,7 @@ LL | const SLICE_CONTENT_INVALID: &[bool] = &[unsafe { mem::transmute(3u8) }]; = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800> error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:95:1 + --> $DIR/ub-wide-ptr.rs:96:1 | LL | const MYSLICE_PREFIX_BAD: &MySliceBool = &MySlice(unsafe { mem::transmute(3u8) }, [false]); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<deref>.0: encountered 0x03, but expected a boolean @@ -174,7 +169,7 @@ LL | const MYSLICE_PREFIX_BAD: &MySliceBool = &MySlice(unsafe { mem::transmute(3 } error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:95:42 + --> $DIR/ub-wide-ptr.rs:96:42 | LL | const MYSLICE_PREFIX_BAD: &MySliceBool = &MySlice(unsafe { mem::transmute(3u8) }, [false]); | -------------------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors @@ -183,7 +178,7 @@ LL | const MYSLICE_PREFIX_BAD: &MySliceBool = &MySlice(unsafe { mem::transmute(3 = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800> error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:100:1 + --> $DIR/ub-wide-ptr.rs:101:1 | LL | const MYSLICE_SUFFIX_BAD: &MySliceBool = &MySlice(true, [unsafe { mem::transmute(3u8) }]); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<deref>.1[0]: encountered 0x03, but expected a boolean @@ -194,7 +189,7 @@ LL | const MYSLICE_SUFFIX_BAD: &MySliceBool = &MySlice(true, [unsafe { mem::tran } error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:100:42 + --> $DIR/ub-wide-ptr.rs:101:42 | LL | const MYSLICE_SUFFIX_BAD: &MySliceBool = &MySlice(true, [unsafe { mem::transmute(3u8) }]); | -------------------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors @@ -202,19 +197,14 @@ LL | const MYSLICE_SUFFIX_BAD: &MySliceBool = &MySlice(true, [unsafe { mem::tran = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800> -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:109:1 +error[E0080]: evaluation of constant value failed + --> $DIR/ub-wide-ptr.rs:110:1 | LL | const RAW_SLICE_LENGTH_UNINIT: *const [u8] = unsafe { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized raw pointer - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 8, align: 4) { - 2a 00 00 00 __ __ __ __ │ *...░░░░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:117:1 + --> $DIR/ub-wide-ptr.rs:119:1 | LL | const TRAIT_OBJ_SHORT_VTABLE_1: W<&dyn Trait> = unsafe { mem::transmute(W((&92u8, &3u8))) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .0: encountered allocN, but expected a vtable pointer @@ -225,7 +215,7 @@ LL | const TRAIT_OBJ_SHORT_VTABLE_1: W<&dyn Trait> = unsafe { mem::transmute(W(( } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:121:1 + --> $DIR/ub-wide-ptr.rs:123:1 | LL | const TRAIT_OBJ_SHORT_VTABLE_2: W<&dyn Trait> = unsafe { mem::transmute(W((&92u8, &3u64))) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .0: encountered allocN, but expected a vtable pointer @@ -236,7 +226,7 @@ LL | const TRAIT_OBJ_SHORT_VTABLE_2: W<&dyn Trait> = unsafe { mem::transmute(W(( } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:125:1 + --> $DIR/ub-wide-ptr.rs:127:1 | LL | const TRAIT_OBJ_INT_VTABLE: W<&dyn Trait> = unsafe { mem::transmute(W((&92u8, 4usize))) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .0: encountered 0x4[noalloc], but expected a vtable pointer @@ -247,25 +237,25 @@ LL | const TRAIT_OBJ_INT_VTABLE: W<&dyn Trait> = unsafe { mem::transmute(W((&92u } error[E0080]: evaluation of constant value failed - --> $DIR/ub-wide-ptr.rs:128:57 + --> $DIR/ub-wide-ptr.rs:130:57 | LL | const TRAIT_OBJ_UNALIGNED_VTABLE: &dyn Trait = unsafe { mem::transmute((&92u8, &[0u8; 128])) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using allocN as vtable pointer but it does not point to a vtable error[E0080]: evaluation of constant value failed - --> $DIR/ub-wide-ptr.rs:131:57 + --> $DIR/ub-wide-ptr.rs:133:57 | LL | const TRAIT_OBJ_BAD_DROP_FN_NULL: &dyn Trait = unsafe { mem::transmute((&92u8, &[0usize; 8])) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using allocN as vtable pointer but it does not point to a vtable error[E0080]: evaluation of constant value failed - --> $DIR/ub-wide-ptr.rs:134:56 + --> $DIR/ub-wide-ptr.rs:136:56 | LL | const TRAIT_OBJ_BAD_DROP_FN_INT: &dyn Trait = unsafe { mem::transmute((&92u8, &[1usize; 8])) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using allocN as vtable pointer but it does not point to a vtable error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:137:1 + --> $DIR/ub-wide-ptr.rs:139:1 | LL | const TRAIT_OBJ_BAD_DROP_FN_NOT_FN_PTR: W<&dyn Trait> = unsafe { mem::transmute(W((&92u8, &[&42u8; 8]))) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .0: encountered allocN, but expected a vtable pointer @@ -276,7 +266,7 @@ LL | const TRAIT_OBJ_BAD_DROP_FN_NOT_FN_PTR: W<&dyn Trait> = unsafe { mem::trans } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:142:1 + --> $DIR/ub-wide-ptr.rs:144:1 | LL | const TRAIT_OBJ_CONTENT_INVALID: &dyn Trait = unsafe { mem::transmute::<_, &bool>(&3u8) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<deref>.<dyn-downcast>: encountered 0x03, but expected a boolean @@ -286,17 +276,27 @@ LL | const TRAIT_OBJ_CONTENT_INVALID: &dyn Trait = unsafe { mem::transmute::<_, ╾allocN─╼ ╾allocN─╼ │ ╾──╼╾──╼ } -error[E0080]: evaluation of constant value failed - --> $DIR/ub-wide-ptr.rs:147:62 +error[E0080]: it is undefined behavior to use this value + --> $DIR/ub-wide-ptr.rs:149:1 | LL | const RAW_TRAIT_OBJ_VTABLE_NULL: *const dyn Trait = unsafe { mem::transmute((&92u8, 0usize)) }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ out-of-bounds pointer use: null pointer is a dangling pointer (it has no provenance) + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered null pointer, but expected a vtable pointer + | + = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. + = note: the raw bytes of the constant (size: 8, align: 4) { + ╾allocN─╼ 00 00 00 00 │ ╾──╼.... + } -error[E0080]: evaluation of constant value failed - --> $DIR/ub-wide-ptr.rs:150:65 +error[E0080]: it is undefined behavior to use this value + --> $DIR/ub-wide-ptr.rs:151:1 | LL | const RAW_TRAIT_OBJ_VTABLE_INVALID: *const dyn Trait = unsafe { mem::transmute((&92u8, &3u64)) }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using allocN as vtable pointer but it does not point to a vtable + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered allocN, but expected a vtable pointer + | + = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. + = note: the raw bytes of the constant (size: 8, align: 4) { + ╾allocN─╼ ╾allocN─╼ │ ╾──╼╾──╼ + } error[E0080]: could not evaluate static initializer --> $DIR/ub-wide-ptr.rs:157:5 @@ -341,7 +341,7 @@ LL | const MY_STR_LENGTH_PTR: &MyStr = unsafe { mem::transmute((&42u8, &3)) }; Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:75:1 + --> $DIR/ub-wide-ptr.rs:76:1 | LL | const SLICE_LENGTH_PTR: &[u8] = unsafe { mem::transmute((&42u8, &3)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -354,7 +354,7 @@ LL | const SLICE_LENGTH_PTR: &[u8] = unsafe { mem::transmute((&42u8, &3)) }; Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:82:1 + --> $DIR/ub-wide-ptr.rs:83:1 | LL | const SLICE_LENGTH_PTR_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, &3)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -367,7 +367,7 @@ LL | const SLICE_LENGTH_PTR_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, &3) Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:87:40 + --> $DIR/ub-wide-ptr.rs:88:40 | LL | const SLICE_CONTENT_INVALID: &[bool] = &[unsafe { mem::transmute(3u8) }]; | ------------------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors @@ -378,7 +378,7 @@ LL | const SLICE_CONTENT_INVALID: &[bool] = &[unsafe { mem::transmute(3u8) }]; Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:95:42 + --> $DIR/ub-wide-ptr.rs:96:42 | LL | const MYSLICE_PREFIX_BAD: &MySliceBool = &MySlice(unsafe { mem::transmute(3u8) }, [false]); | -------------------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors @@ -389,7 +389,7 @@ LL | const MYSLICE_PREFIX_BAD: &MySliceBool = &MySlice(unsafe { mem::transmute(3 Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:100:42 + --> $DIR/ub-wide-ptr.rs:101:42 | LL | const MYSLICE_SUFFIX_BAD: &MySliceBool = &MySlice(true, [unsafe { mem::transmute(3u8) }]); | -------------------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors diff --git a/src/test/ui/consts/const-eval/ub-wide-ptr.64bit.stderr b/src/test/ui/consts/const-eval/ub-wide-ptr.64bit.stderr index d6c612bb4..1d84b7bce 100644 --- a/src/test/ui/consts/const-eval/ub-wide-ptr.64bit.stderr +++ b/src/test/ui/consts/const-eval/ub-wide-ptr.64bit.stderr @@ -76,19 +76,14 @@ LL | const MYSTR_NO_INIT: &MyStr = unsafe { mem::transmute::<&[_], _>(&[MaybeUni ╾───────allocN───────╼ 01 00 00 00 00 00 00 00 │ ╾──────╼........ } -error[E0080]: it is undefined behavior to use this value +error[E0080]: evaluation of constant value failed --> $DIR/ub-wide-ptr.rs:63:1 | LL | const SLICE_LENGTH_UNINIT: &[u8] = unsafe { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized reference - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 16, align: 8) { - __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:69:1 + --> $DIR/ub-wide-ptr.rs:70:1 | LL | const SLICE_TOO_LONG: &[u8] = unsafe { mem::transmute((&42u8, 999usize)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered a dangling reference (going beyond the bounds of its allocation) @@ -99,7 +94,7 @@ LL | const SLICE_TOO_LONG: &[u8] = unsafe { mem::transmute((&42u8, 999usize)) }; } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:72:1 + --> $DIR/ub-wide-ptr.rs:73:1 | LL | const SLICE_TOO_LONG_OVERFLOW: &[u32] = unsafe { mem::transmute((&42u32, isize::MAX)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered invalid reference metadata: slice is bigger than largest supported object @@ -110,7 +105,7 @@ LL | const SLICE_TOO_LONG_OVERFLOW: &[u32] = unsafe { mem::transmute((&42u32, is } error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:75:1 + --> $DIR/ub-wide-ptr.rs:76:1 | LL | const SLICE_LENGTH_PTR: &[u8] = unsafe { mem::transmute((&42u8, &3)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -121,7 +116,7 @@ LL | const SLICE_LENGTH_PTR: &[u8] = unsafe { mem::transmute((&42u8, &3)) }; = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:79:1 + --> $DIR/ub-wide-ptr.rs:80:1 | LL | const SLICE_TOO_LONG_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, 999usize)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered a dangling box (going beyond the bounds of its allocation) @@ -132,7 +127,7 @@ LL | const SLICE_TOO_LONG_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, 999us } error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:82:1 + --> $DIR/ub-wide-ptr.rs:83:1 | LL | const SLICE_LENGTH_PTR_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, &3)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -143,7 +138,7 @@ LL | const SLICE_LENGTH_PTR_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, &3) = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:87:1 + --> $DIR/ub-wide-ptr.rs:88:1 | LL | const SLICE_CONTENT_INVALID: &[bool] = &[unsafe { mem::transmute(3u8) }]; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<deref>[0]: encountered 0x03, but expected a boolean @@ -154,7 +149,7 @@ LL | const SLICE_CONTENT_INVALID: &[bool] = &[unsafe { mem::transmute(3u8) }]; } error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:87:40 + --> $DIR/ub-wide-ptr.rs:88:40 | LL | const SLICE_CONTENT_INVALID: &[bool] = &[unsafe { mem::transmute(3u8) }]; | ------------------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors @@ -163,7 +158,7 @@ LL | const SLICE_CONTENT_INVALID: &[bool] = &[unsafe { mem::transmute(3u8) }]; = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800> error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:95:1 + --> $DIR/ub-wide-ptr.rs:96:1 | LL | const MYSLICE_PREFIX_BAD: &MySliceBool = &MySlice(unsafe { mem::transmute(3u8) }, [false]); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<deref>.0: encountered 0x03, but expected a boolean @@ -174,7 +169,7 @@ LL | const MYSLICE_PREFIX_BAD: &MySliceBool = &MySlice(unsafe { mem::transmute(3 } error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:95:42 + --> $DIR/ub-wide-ptr.rs:96:42 | LL | const MYSLICE_PREFIX_BAD: &MySliceBool = &MySlice(unsafe { mem::transmute(3u8) }, [false]); | -------------------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors @@ -183,7 +178,7 @@ LL | const MYSLICE_PREFIX_BAD: &MySliceBool = &MySlice(unsafe { mem::transmute(3 = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800> error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:100:1 + --> $DIR/ub-wide-ptr.rs:101:1 | LL | const MYSLICE_SUFFIX_BAD: &MySliceBool = &MySlice(true, [unsafe { mem::transmute(3u8) }]); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<deref>.1[0]: encountered 0x03, but expected a boolean @@ -194,7 +189,7 @@ LL | const MYSLICE_SUFFIX_BAD: &MySliceBool = &MySlice(true, [unsafe { mem::tran } error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:100:42 + --> $DIR/ub-wide-ptr.rs:101:42 | LL | const MYSLICE_SUFFIX_BAD: &MySliceBool = &MySlice(true, [unsafe { mem::transmute(3u8) }]); | -------------------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors @@ -202,19 +197,14 @@ LL | const MYSLICE_SUFFIX_BAD: &MySliceBool = &MySlice(true, [unsafe { mem::tran = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800> -error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:109:1 +error[E0080]: evaluation of constant value failed + --> $DIR/ub-wide-ptr.rs:110:1 | LL | const RAW_SLICE_LENGTH_UNINIT: *const [u8] = unsafe { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized raw pointer - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 16, align: 8) { - __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ │ ░░░░░░░░░░░░░░░░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:117:1 + --> $DIR/ub-wide-ptr.rs:119:1 | LL | const TRAIT_OBJ_SHORT_VTABLE_1: W<&dyn Trait> = unsafe { mem::transmute(W((&92u8, &3u8))) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .0: encountered allocN, but expected a vtable pointer @@ -225,7 +215,7 @@ LL | const TRAIT_OBJ_SHORT_VTABLE_1: W<&dyn Trait> = unsafe { mem::transmute(W(( } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:121:1 + --> $DIR/ub-wide-ptr.rs:123:1 | LL | const TRAIT_OBJ_SHORT_VTABLE_2: W<&dyn Trait> = unsafe { mem::transmute(W((&92u8, &3u64))) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .0: encountered allocN, but expected a vtable pointer @@ -236,7 +226,7 @@ LL | const TRAIT_OBJ_SHORT_VTABLE_2: W<&dyn Trait> = unsafe { mem::transmute(W(( } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:125:1 + --> $DIR/ub-wide-ptr.rs:127:1 | LL | const TRAIT_OBJ_INT_VTABLE: W<&dyn Trait> = unsafe { mem::transmute(W((&92u8, 4usize))) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .0: encountered 0x4[noalloc], but expected a vtable pointer @@ -247,25 +237,25 @@ LL | const TRAIT_OBJ_INT_VTABLE: W<&dyn Trait> = unsafe { mem::transmute(W((&92u } error[E0080]: evaluation of constant value failed - --> $DIR/ub-wide-ptr.rs:128:57 + --> $DIR/ub-wide-ptr.rs:130:57 | LL | const TRAIT_OBJ_UNALIGNED_VTABLE: &dyn Trait = unsafe { mem::transmute((&92u8, &[0u8; 128])) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using allocN as vtable pointer but it does not point to a vtable error[E0080]: evaluation of constant value failed - --> $DIR/ub-wide-ptr.rs:131:57 + --> $DIR/ub-wide-ptr.rs:133:57 | LL | const TRAIT_OBJ_BAD_DROP_FN_NULL: &dyn Trait = unsafe { mem::transmute((&92u8, &[0usize; 8])) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using allocN as vtable pointer but it does not point to a vtable error[E0080]: evaluation of constant value failed - --> $DIR/ub-wide-ptr.rs:134:56 + --> $DIR/ub-wide-ptr.rs:136:56 | LL | const TRAIT_OBJ_BAD_DROP_FN_INT: &dyn Trait = unsafe { mem::transmute((&92u8, &[1usize; 8])) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using allocN as vtable pointer but it does not point to a vtable error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:137:1 + --> $DIR/ub-wide-ptr.rs:139:1 | LL | const TRAIT_OBJ_BAD_DROP_FN_NOT_FN_PTR: W<&dyn Trait> = unsafe { mem::transmute(W((&92u8, &[&42u8; 8]))) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .0: encountered allocN, but expected a vtable pointer @@ -276,7 +266,7 @@ LL | const TRAIT_OBJ_BAD_DROP_FN_NOT_FN_PTR: W<&dyn Trait> = unsafe { mem::trans } error[E0080]: it is undefined behavior to use this value - --> $DIR/ub-wide-ptr.rs:142:1 + --> $DIR/ub-wide-ptr.rs:144:1 | LL | const TRAIT_OBJ_CONTENT_INVALID: &dyn Trait = unsafe { mem::transmute::<_, &bool>(&3u8) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<deref>.<dyn-downcast>: encountered 0x03, but expected a boolean @@ -286,17 +276,27 @@ LL | const TRAIT_OBJ_CONTENT_INVALID: &dyn Trait = unsafe { mem::transmute::<_, ╾──────allocN───────╼ ╾──────allocN───────╼ │ ╾──────╼╾──────╼ } -error[E0080]: evaluation of constant value failed - --> $DIR/ub-wide-ptr.rs:147:62 +error[E0080]: it is undefined behavior to use this value + --> $DIR/ub-wide-ptr.rs:149:1 | LL | const RAW_TRAIT_OBJ_VTABLE_NULL: *const dyn Trait = unsafe { mem::transmute((&92u8, 0usize)) }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ out-of-bounds pointer use: null pointer is a dangling pointer (it has no provenance) + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered null pointer, but expected a vtable pointer + | + = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. + = note: the raw bytes of the constant (size: 16, align: 8) { + ╾──────allocN───────╼ 00 00 00 00 00 00 00 00 │ ╾──────╼........ + } -error[E0080]: evaluation of constant value failed - --> $DIR/ub-wide-ptr.rs:150:65 +error[E0080]: it is undefined behavior to use this value + --> $DIR/ub-wide-ptr.rs:151:1 | LL | const RAW_TRAIT_OBJ_VTABLE_INVALID: *const dyn Trait = unsafe { mem::transmute((&92u8, &3u64)) }; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using allocN as vtable pointer but it does not point to a vtable + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered allocN, but expected a vtable pointer + | + = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. + = note: the raw bytes of the constant (size: 16, align: 8) { + ╾──────allocN───────╼ ╾──────allocN───────╼ │ ╾──────╼╾──────╼ + } error[E0080]: could not evaluate static initializer --> $DIR/ub-wide-ptr.rs:157:5 @@ -341,7 +341,7 @@ LL | const MY_STR_LENGTH_PTR: &MyStr = unsafe { mem::transmute((&42u8, &3)) }; Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:75:1 + --> $DIR/ub-wide-ptr.rs:76:1 | LL | const SLICE_LENGTH_PTR: &[u8] = unsafe { mem::transmute((&42u8, &3)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -354,7 +354,7 @@ LL | const SLICE_LENGTH_PTR: &[u8] = unsafe { mem::transmute((&42u8, &3)) }; Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:82:1 + --> $DIR/ub-wide-ptr.rs:83:1 | LL | const SLICE_LENGTH_PTR_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, &3)) }; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unable to turn pointer into raw bytes @@ -367,7 +367,7 @@ LL | const SLICE_LENGTH_PTR_BOX: Box<[u8]> = unsafe { mem::transmute((&42u8, &3) Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:87:40 + --> $DIR/ub-wide-ptr.rs:88:40 | LL | const SLICE_CONTENT_INVALID: &[bool] = &[unsafe { mem::transmute(3u8) }]; | ------------------------------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors @@ -378,7 +378,7 @@ LL | const SLICE_CONTENT_INVALID: &[bool] = &[unsafe { mem::transmute(3u8) }]; Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:95:42 + --> $DIR/ub-wide-ptr.rs:96:42 | LL | const MYSLICE_PREFIX_BAD: &MySliceBool = &MySlice(unsafe { mem::transmute(3u8) }, [false]); | -------------------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors @@ -389,7 +389,7 @@ LL | const MYSLICE_PREFIX_BAD: &MySliceBool = &MySlice(unsafe { mem::transmute(3 Future breakage diagnostic: error: any use of this value will cause an error - --> $DIR/ub-wide-ptr.rs:100:42 + --> $DIR/ub-wide-ptr.rs:101:42 | LL | const MYSLICE_SUFFIX_BAD: &MySliceBool = &MySlice(true, [unsafe { mem::transmute(3u8) }]); | -------------------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ referenced constant has errors diff --git a/src/test/ui/consts/const-eval/ub-wide-ptr.rs b/src/test/ui/consts/const-eval/ub-wide-ptr.rs index a0377ab1e..788403a6d 100644 --- a/src/test/ui/consts/const-eval/ub-wide-ptr.rs +++ b/src/test/ui/consts/const-eval/ub-wide-ptr.rs @@ -61,7 +61,8 @@ const MYSTR_NO_INIT: &MyStr = unsafe { mem::transmute::<&[_], _>(&[MaybeUninit:: const SLICE_VALID: &[u8] = unsafe { mem::transmute((&42u8, 1usize)) }; // bad slice: length uninit const SLICE_LENGTH_UNINIT: &[u8] = unsafe { -//~^ ERROR it is undefined behavior to use this value +//~^ ERROR evaluation of constant value failed +//~| uninitialized let uninit_len = MaybeUninit::<usize> { uninit: () }; mem::transmute((42, uninit_len)) }; @@ -107,7 +108,8 @@ const RAW_SLICE_VALID: *const [u8] = unsafe { mem::transmute((&42u8, 1usize)) }; const RAW_SLICE_TOO_LONG: *const [u8] = unsafe { mem::transmute((&42u8, 999usize)) }; // ok because raw const RAW_SLICE_MUCH_TOO_LONG: *const [u8] = unsafe { mem::transmute((&42u8, usize::MAX)) }; // ok because raw const RAW_SLICE_LENGTH_UNINIT: *const [u8] = unsafe { -//~^ ERROR it is undefined behavior to use this value +//~^ ERROR evaluation of constant value failed +//~| uninitialized let uninit_len = MaybeUninit::<usize> { uninit: () }; mem::transmute((42, uninit_len)) }; @@ -145,11 +147,9 @@ const TRAIT_OBJ_CONTENT_INVALID: &dyn Trait = unsafe { mem::transmute::<_, &bool // # raw trait object const RAW_TRAIT_OBJ_VTABLE_NULL: *const dyn Trait = unsafe { mem::transmute((&92u8, 0usize)) }; -//~^ ERROR evaluation of constant value failed -//~| null pointer +//~^ ERROR it is undefined behavior to use this value const RAW_TRAIT_OBJ_VTABLE_INVALID: *const dyn Trait = unsafe { mem::transmute((&92u8, &3u64)) }; -//~^ ERROR evaluation of constant value failed -//~| does not point to a vtable +//~^ ERROR it is undefined behavior to use this value const RAW_TRAIT_OBJ_CONTENT_INVALID: *const dyn Trait = unsafe { mem::transmute::<_, &bool>(&3u8) } as *const dyn Trait; // ok because raw // Const eval fails for these, so they need to be statics to error. diff --git a/src/test/ui/consts/const-eval/union-const-eval-field.rs b/src/test/ui/consts/const-eval/union-const-eval-field.rs index a1e48cac4..d88bf2a84 100644 --- a/src/test/ui/consts/const-eval/union-const-eval-field.rs +++ b/src/test/ui/consts/const-eval/union-const-eval-field.rs @@ -26,7 +26,8 @@ const fn read_field2() -> Field2 { const fn read_field3() -> Field3 { const FIELD3: Field3 = unsafe { UNION.field3 }; - //~^ ERROR it is undefined behavior to use this value + //~^ ERROR evaluation of constant value failed + //~| uninitialized FIELD3 //~^ ERROR erroneous constant used [E0080] } diff --git a/src/test/ui/consts/const-eval/union-const-eval-field.stderr b/src/test/ui/consts/const-eval/union-const-eval-field.stderr index c512e6825..00964489e 100644 --- a/src/test/ui/consts/const-eval/union-const-eval-field.stderr +++ b/src/test/ui/consts/const-eval/union-const-eval-field.stderr @@ -1,16 +1,11 @@ -error[E0080]: it is undefined behavior to use this value - --> $DIR/union-const-eval-field.rs:28:5 +error[E0080]: evaluation of constant value failed + --> $DIR/union-const-eval-field.rs:28:37 | LL | const FIELD3: Field3 = unsafe { UNION.field3 }; - | ^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized bytes, but expected initialized bytes - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 8, align: 8) { - __ __ __ __ __ __ __ __ │ ░░░░░░░░ - } + | ^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error[E0080]: erroneous constant used - --> $DIR/union-const-eval-field.rs:30:5 + --> $DIR/union-const-eval-field.rs:31:5 | LL | FIELD3 | ^^^^^^ referenced constant has errors diff --git a/src/test/ui/consts/const-eval/union-ice.rs b/src/test/ui/consts/const-eval/union-ice.rs index 4189619b2..dd970a355 100644 --- a/src/test/ui/consts/const-eval/union-ice.rs +++ b/src/test/ui/consts/const-eval/union-ice.rs @@ -11,11 +11,15 @@ union DummyUnion { const UNION: DummyUnion = DummyUnion { field1: 1065353216 }; -const FIELD3: Field3 = unsafe { UNION.field3 }; //~ ERROR it is undefined behavior to use this value +const FIELD3: Field3 = unsafe { UNION.field3 }; +//~^ ERROR evaluation of constant value failed +//~| uninitialized -const FIELD_PATH: Struct = Struct { //~ ERROR it is undefined behavior to use this value +const FIELD_PATH: Struct = Struct { a: 42, b: unsafe { UNION.field3 }, + //~^ ERROR evaluation of constant value failed + //~| uninitialized }; struct Struct { @@ -23,10 +27,12 @@ struct Struct { b: Field3, } -const FIELD_PATH2: Struct2 = Struct2 { //~ ERROR it is undefined behavior to use this value +const FIELD_PATH2: Struct2 = Struct2 { b: [ 21, unsafe { UNION.field3 }, + //~^ ERROR evaluation of constant value failed + //~| uninitialized 23, 24, ], diff --git a/src/test/ui/consts/const-eval/union-ice.stderr b/src/test/ui/consts/const-eval/union-ice.stderr index 21a545509..bd39a0551 100644 --- a/src/test/ui/consts/const-eval/union-ice.stderr +++ b/src/test/ui/consts/const-eval/union-ice.stderr @@ -1,37 +1,20 @@ -error[E0080]: it is undefined behavior to use this value - --> $DIR/union-ice.rs:14:1 +error[E0080]: evaluation of constant value failed + --> $DIR/union-ice.rs:14:33 | LL | const FIELD3: Field3 = unsafe { UNION.field3 }; - | ^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized bytes, but expected initialized bytes - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 8, align: 8) { - __ __ __ __ __ __ __ __ │ ░░░░░░░░ - } + | ^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory -error[E0080]: it is undefined behavior to use this value - --> $DIR/union-ice.rs:16:1 - | -LL | const FIELD_PATH: Struct = Struct { - | ^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .b: encountered uninitialized bytes, but expected initialized bytes +error[E0080]: evaluation of constant value failed + --> $DIR/union-ice.rs:20:17 | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 16, align: 8) { - __ __ __ __ __ __ __ __ 2a __ __ __ __ __ __ __ │ ░░░░░░░░*░░░░░░░ - } +LL | b: unsafe { UNION.field3 }, + | ^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory -error[E0080]: it is undefined behavior to use this value - --> $DIR/union-ice.rs:26:1 - | -LL | const FIELD_PATH2: Struct2 = Struct2 { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .b[1]: encountered uninitialized bytes +error[E0080]: evaluation of constant value failed + --> $DIR/union-ice.rs:33:18 | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 40, align: 8) { - 0x00 │ 15 00 00 00 00 00 00 00 __ __ __ __ __ __ __ __ │ ........░░░░░░░░ - 0x10 │ 17 00 00 00 00 00 00 00 18 00 00 00 00 00 00 00 │ ................ - 0x20 │ 2a __ __ __ __ __ __ __ │ *░░░░░░░ - } +LL | unsafe { UNION.field3 }, + | ^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error: aborting due to 3 previous errors diff --git a/src/test/ui/consts/const-eval/union-ub.32bit.stderr b/src/test/ui/consts/const-eval/union-ub.32bit.stderr index baf682596..38ded4d65 100644 --- a/src/test/ui/consts/const-eval/union-ub.32bit.stderr +++ b/src/test/ui/consts/const-eval/union-ub.32bit.stderr @@ -9,16 +9,11 @@ LL | const BAD_BOOL: bool = unsafe { DummyUnion { u8: 42 }.bool}; 2a │ * } -error[E0080]: it is undefined behavior to use this value - --> $DIR/union-ub.rs:35:1 +error[E0080]: evaluation of constant value failed + --> $DIR/union-ub.rs:35:36 | LL | const UNINIT_BOOL: bool = unsafe { DummyUnion { unit: () }.bool}; - | ^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized bytes, but expected a boolean - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 1, align: 1) { - __ │ ░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error: aborting due to 2 previous errors diff --git a/src/test/ui/consts/const-eval/union-ub.64bit.stderr b/src/test/ui/consts/const-eval/union-ub.64bit.stderr index baf682596..38ded4d65 100644 --- a/src/test/ui/consts/const-eval/union-ub.64bit.stderr +++ b/src/test/ui/consts/const-eval/union-ub.64bit.stderr @@ -9,16 +9,11 @@ LL | const BAD_BOOL: bool = unsafe { DummyUnion { u8: 42 }.bool}; 2a │ * } -error[E0080]: it is undefined behavior to use this value - --> $DIR/union-ub.rs:35:1 +error[E0080]: evaluation of constant value failed + --> $DIR/union-ub.rs:35:36 | LL | const UNINIT_BOOL: bool = unsafe { DummyUnion { unit: () }.bool}; - | ^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered uninitialized bytes, but expected a boolean - | - = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior. - = note: the raw bytes of the constant (size: 1, align: 1) { - __ │ ░ - } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory error: aborting due to 2 previous errors diff --git a/src/test/ui/consts/const-eval/union-ub.rs b/src/test/ui/consts/const-eval/union-ub.rs index c1bfe69a7..bb29edcf8 100644 --- a/src/test/ui/consts/const-eval/union-ub.rs +++ b/src/test/ui/consts/const-eval/union-ub.rs @@ -33,7 +33,8 @@ union Bar { const BAD_BOOL: bool = unsafe { DummyUnion { u8: 42 }.bool}; //~^ ERROR it is undefined behavior to use this value const UNINIT_BOOL: bool = unsafe { DummyUnion { unit: () }.bool}; -//~^ ERROR it is undefined behavior to use this value +//~^ ERROR evaluation of constant value failed +//~| uninitialized // The value is not valid for any union variant, but that's fine // unions are just a convenient way to transmute bits around |