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-rw-r--r--src/test/ui/parser/issues/issue-101540.rs7
-rw-r--r--src/test/ui/parser/issues/issue-101540.stderr12
-rw-r--r--src/test/ui/parser/issues/issue-102182-impl-trait-recover.rs3
-rw-r--r--src/test/ui/parser/issues/issue-102182-impl-trait-recover.stderr14
-rw-r--r--src/test/ui/parser/issues/issue-14303-enum.rs6
-rw-r--r--src/test/ui/parser/issues/issue-14303-enum.stderr8
-rw-r--r--src/test/ui/parser/issues/issue-14303-fn-def.rs4
-rw-r--r--src/test/ui/parser/issues/issue-14303-fn-def.stderr8
-rw-r--r--src/test/ui/parser/issues/issue-14303-impl.rs6
-rw-r--r--src/test/ui/parser/issues/issue-14303-impl.stderr8
-rw-r--r--src/test/ui/parser/issues/issue-14303-path.rs13
-rw-r--r--src/test/ui/parser/issues/issue-14303-path.stderr9
-rw-r--r--src/test/ui/parser/issues/issue-14303-struct.rs6
-rw-r--r--src/test/ui/parser/issues/issue-14303-struct.stderr8
-rw-r--r--src/test/ui/parser/issues/issue-14303-trait.rs4
-rw-r--r--src/test/ui/parser/issues/issue-14303-trait.stderr8
-rw-r--r--src/test/ui/parser/issues/issue-14303.rs33
-rw-r--r--src/test/ui/parser/issues/issue-14303.stderr39
-rw-r--r--src/test/ui/parser/issues/issue-17383.rs7
-rw-r--r--src/test/ui/parser/issues/issue-17383.stderr15
-rw-r--r--src/test/ui/parser/issues/issue-34222-1.stderr2
-rw-r--r--src/test/ui/parser/issues/issue-48636.stderr4
-rw-r--r--src/test/ui/parser/issues/issue-63115-range-pat-interpolated.rs1
-rw-r--r--src/test/ui/parser/issues/issue-67377-invalid-syntax-in-enum-discriminant.stderr4
-rw-r--r--src/test/ui/parser/issues/issue-68000-unicode-ident-after-missing-comma.stderr2
-rw-r--r--src/test/ui/parser/issues/issue-8537.stderr2
-rw-r--r--src/test/ui/parser/issues/issue-89574.stderr4
-rw-r--r--src/test/ui/parser/issues/issue-93282.rs1
-rw-r--r--src/test/ui/parser/issues/issue-93282.stderr27
29 files changed, 146 insertions, 119 deletions
diff --git a/src/test/ui/parser/issues/issue-101540.rs b/src/test/ui/parser/issues/issue-101540.rs
new file mode 100644
index 000000000..328ec6f90
--- /dev/null
+++ b/src/test/ui/parser/issues/issue-101540.rs
@@ -0,0 +1,7 @@
+struct S1 {
+ struct S2 {
+ //~^ ERROR structs are not allowed in struct definitions
+ }
+}
+
+fn main() {}
diff --git a/src/test/ui/parser/issues/issue-101540.stderr b/src/test/ui/parser/issues/issue-101540.stderr
new file mode 100644
index 000000000..8af887050
--- /dev/null
+++ b/src/test/ui/parser/issues/issue-101540.stderr
@@ -0,0 +1,12 @@
+error: structs are not allowed in struct definitions
+ --> $DIR/issue-101540.rs:2:5
+ |
+LL | struct S1 {
+ | -- while parsing this struct
+LL | struct S2 {
+ | ^^^^^^^^^
+ |
+ = help: consider creating a new `struct` definition instead of nesting
+
+error: aborting due to previous error
+
diff --git a/src/test/ui/parser/issues/issue-102182-impl-trait-recover.rs b/src/test/ui/parser/issues/issue-102182-impl-trait-recover.rs
new file mode 100644
index 000000000..4bfc676d6
--- /dev/null
+++ b/src/test/ui/parser/issues/issue-102182-impl-trait-recover.rs
@@ -0,0 +1,3 @@
+fn foo<T: impl Trait>() {}
+//~^ ERROR expected trait bound, found `impl Trait` type
+fn main() {}
diff --git a/src/test/ui/parser/issues/issue-102182-impl-trait-recover.stderr b/src/test/ui/parser/issues/issue-102182-impl-trait-recover.stderr
new file mode 100644
index 000000000..52b6ae5df
--- /dev/null
+++ b/src/test/ui/parser/issues/issue-102182-impl-trait-recover.stderr
@@ -0,0 +1,14 @@
+error: expected trait bound, found `impl Trait` type
+ --> $DIR/issue-102182-impl-trait-recover.rs:1:11
+ |
+LL | fn foo<T: impl Trait>() {}
+ | ^^^^^^^^^^ not a trait
+ |
+help: use the trait bounds directly
+ |
+LL - fn foo<T: impl Trait>() {}
+LL + fn foo<T: Trait>() {}
+ |
+
+error: aborting due to previous error
+
diff --git a/src/test/ui/parser/issues/issue-14303-enum.rs b/src/test/ui/parser/issues/issue-14303-enum.rs
deleted file mode 100644
index a61061598..000000000
--- a/src/test/ui/parser/issues/issue-14303-enum.rs
+++ /dev/null
@@ -1,6 +0,0 @@
-enum X<'a, T, 'b> {
-//~^ ERROR lifetime parameters must be declared prior to type parameters
- A(&'a &'b T)
-}
-
-fn main() {}
diff --git a/src/test/ui/parser/issues/issue-14303-enum.stderr b/src/test/ui/parser/issues/issue-14303-enum.stderr
deleted file mode 100644
index 55cef4cab..000000000
--- a/src/test/ui/parser/issues/issue-14303-enum.stderr
+++ /dev/null
@@ -1,8 +0,0 @@
-error: lifetime parameters must be declared prior to type parameters
- --> $DIR/issue-14303-enum.rs:1:15
- |
-LL | enum X<'a, T, 'b> {
- | --------^^- help: reorder the parameters: lifetimes, then consts and types: `<'a, 'b, T>`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/parser/issues/issue-14303-fn-def.rs b/src/test/ui/parser/issues/issue-14303-fn-def.rs
deleted file mode 100644
index 221bd311e..000000000
--- a/src/test/ui/parser/issues/issue-14303-fn-def.rs
+++ /dev/null
@@ -1,4 +0,0 @@
-fn foo<'a, T, 'b>(x: &'a T) {}
-//~^ ERROR lifetime parameters must be declared prior to type parameters
-
-fn main() {}
diff --git a/src/test/ui/parser/issues/issue-14303-fn-def.stderr b/src/test/ui/parser/issues/issue-14303-fn-def.stderr
deleted file mode 100644
index bacc92296..000000000
--- a/src/test/ui/parser/issues/issue-14303-fn-def.stderr
+++ /dev/null
@@ -1,8 +0,0 @@
-error: lifetime parameters must be declared prior to type parameters
- --> $DIR/issue-14303-fn-def.rs:1:15
- |
-LL | fn foo<'a, T, 'b>(x: &'a T) {}
- | --------^^- help: reorder the parameters: lifetimes, then consts and types: `<'a, 'b, T>`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/parser/issues/issue-14303-impl.rs b/src/test/ui/parser/issues/issue-14303-impl.rs
deleted file mode 100644
index 4dc2c6660..000000000
--- a/src/test/ui/parser/issues/issue-14303-impl.rs
+++ /dev/null
@@ -1,6 +0,0 @@
-struct X<T>(T);
-
-impl<'a, T, 'b> X<T> {}
-//~^ ERROR lifetime parameters must be declared prior to type parameters
-
-fn main() {}
diff --git a/src/test/ui/parser/issues/issue-14303-impl.stderr b/src/test/ui/parser/issues/issue-14303-impl.stderr
deleted file mode 100644
index d6be02f70..000000000
--- a/src/test/ui/parser/issues/issue-14303-impl.stderr
+++ /dev/null
@@ -1,8 +0,0 @@
-error: lifetime parameters must be declared prior to type parameters
- --> $DIR/issue-14303-impl.rs:3:13
- |
-LL | impl<'a, T, 'b> X<T> {}
- | --------^^- help: reorder the parameters: lifetimes, then consts and types: `<'a, 'b, T>`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/parser/issues/issue-14303-path.rs b/src/test/ui/parser/issues/issue-14303-path.rs
deleted file mode 100644
index 89ef914ab..000000000
--- a/src/test/ui/parser/issues/issue-14303-path.rs
+++ /dev/null
@@ -1,13 +0,0 @@
-mod foo {
- pub struct X<'a, 'b, 'c, T> {
- a: &'a str,
- b: &'b str,
- c: &'c str,
- t: T,
- }
-}
-
-fn bar<'a, 'b, 'c, T>(x: foo::X<'a, T, 'b, 'c>) {}
-//~^ ERROR type provided when a lifetime was expected
-
-fn main() {}
diff --git a/src/test/ui/parser/issues/issue-14303-path.stderr b/src/test/ui/parser/issues/issue-14303-path.stderr
deleted file mode 100644
index 841e63ecb..000000000
--- a/src/test/ui/parser/issues/issue-14303-path.stderr
+++ /dev/null
@@ -1,9 +0,0 @@
-error[E0747]: type provided when a lifetime was expected
- --> $DIR/issue-14303-path.rs:10:37
- |
-LL | fn bar<'a, 'b, 'c, T>(x: foo::X<'a, T, 'b, 'c>) {}
- | ^
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0747`.
diff --git a/src/test/ui/parser/issues/issue-14303-struct.rs b/src/test/ui/parser/issues/issue-14303-struct.rs
deleted file mode 100644
index 0bd10b4d0..000000000
--- a/src/test/ui/parser/issues/issue-14303-struct.rs
+++ /dev/null
@@ -1,6 +0,0 @@
-struct X<'a, T, 'b> {
-//~^ ERROR lifetime parameters must be declared prior to type parameters
- x: &'a &'b T
-}
-
-fn main() {}
diff --git a/src/test/ui/parser/issues/issue-14303-struct.stderr b/src/test/ui/parser/issues/issue-14303-struct.stderr
deleted file mode 100644
index fa62a39f2..000000000
--- a/src/test/ui/parser/issues/issue-14303-struct.stderr
+++ /dev/null
@@ -1,8 +0,0 @@
-error: lifetime parameters must be declared prior to type parameters
- --> $DIR/issue-14303-struct.rs:1:17
- |
-LL | struct X<'a, T, 'b> {
- | --------^^- help: reorder the parameters: lifetimes, then consts and types: `<'a, 'b, T>`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/parser/issues/issue-14303-trait.rs b/src/test/ui/parser/issues/issue-14303-trait.rs
deleted file mode 100644
index f253de92d..000000000
--- a/src/test/ui/parser/issues/issue-14303-trait.rs
+++ /dev/null
@@ -1,4 +0,0 @@
-trait Foo<'a, T, 'b> {}
-//~^ ERROR lifetime parameters must be declared prior to type parameters
-
-fn main() {}
diff --git a/src/test/ui/parser/issues/issue-14303-trait.stderr b/src/test/ui/parser/issues/issue-14303-trait.stderr
deleted file mode 100644
index 75cd67a9d..000000000
--- a/src/test/ui/parser/issues/issue-14303-trait.stderr
+++ /dev/null
@@ -1,8 +0,0 @@
-error: lifetime parameters must be declared prior to type parameters
- --> $DIR/issue-14303-trait.rs:1:18
- |
-LL | trait Foo<'a, T, 'b> {}
- | --------^^- help: reorder the parameters: lifetimes, then consts and types: `<'a, 'b, T>`
-
-error: aborting due to previous error
-
diff --git a/src/test/ui/parser/issues/issue-14303.rs b/src/test/ui/parser/issues/issue-14303.rs
new file mode 100644
index 000000000..82850d77a
--- /dev/null
+++ b/src/test/ui/parser/issues/issue-14303.rs
@@ -0,0 +1,33 @@
+enum Enum<'a, T, 'b> {
+//~^ ERROR lifetime parameters must be declared prior to type and const parameters
+ A(&'a &'b T)
+}
+
+struct Struct<'a, T, 'b> {
+//~^ ERROR lifetime parameters must be declared prior to type and const parameters
+ x: &'a &'b T
+}
+
+trait Trait<'a, T, 'b> {}
+//~^ ERROR lifetime parameters must be declared prior to type and const parameters
+
+fn foo<'a, T, 'b>(x: &'a T) {}
+//~^ ERROR lifetime parameters must be declared prior to type and const parameters
+
+struct Y<T>(T);
+impl<'a, T, 'b> Y<T> {}
+//~^ ERROR lifetime parameters must be declared prior to type and const parameters
+
+mod bar {
+ pub struct X<'a, 'b, 'c, T> {
+ a: &'a str,
+ b: &'b str,
+ c: &'c str,
+ t: T,
+ }
+}
+
+fn bar<'a, 'b, 'c, T>(x: bar::X<'a, T, 'b, 'c>) {}
+//~^ ERROR type provided when a lifetime was expected
+
+fn main() {}
diff --git a/src/test/ui/parser/issues/issue-14303.stderr b/src/test/ui/parser/issues/issue-14303.stderr
new file mode 100644
index 000000000..f121107c0
--- /dev/null
+++ b/src/test/ui/parser/issues/issue-14303.stderr
@@ -0,0 +1,39 @@
+error: lifetime parameters must be declared prior to type and const parameters
+ --> $DIR/issue-14303.rs:1:18
+ |
+LL | enum Enum<'a, T, 'b> {
+ | --------^^- help: reorder the parameters: lifetimes, then consts and types: `<'a, 'b, T>`
+
+error: lifetime parameters must be declared prior to type and const parameters
+ --> $DIR/issue-14303.rs:6:22
+ |
+LL | struct Struct<'a, T, 'b> {
+ | --------^^- help: reorder the parameters: lifetimes, then consts and types: `<'a, 'b, T>`
+
+error: lifetime parameters must be declared prior to type and const parameters
+ --> $DIR/issue-14303.rs:11:20
+ |
+LL | trait Trait<'a, T, 'b> {}
+ | --------^^- help: reorder the parameters: lifetimes, then consts and types: `<'a, 'b, T>`
+
+error: lifetime parameters must be declared prior to type and const parameters
+ --> $DIR/issue-14303.rs:14:15
+ |
+LL | fn foo<'a, T, 'b>(x: &'a T) {}
+ | --------^^- help: reorder the parameters: lifetimes, then consts and types: `<'a, 'b, T>`
+
+error: lifetime parameters must be declared prior to type and const parameters
+ --> $DIR/issue-14303.rs:18:13
+ |
+LL | impl<'a, T, 'b> Y<T> {}
+ | --------^^- help: reorder the parameters: lifetimes, then consts and types: `<'a, 'b, T>`
+
+error[E0747]: type provided when a lifetime was expected
+ --> $DIR/issue-14303.rs:30:37
+ |
+LL | fn bar<'a, 'b, 'c, T>(x: bar::X<'a, T, 'b, 'c>) {}
+ | ^
+
+error: aborting due to 6 previous errors
+
+For more information about this error, try `rustc --explain E0747`.
diff --git a/src/test/ui/parser/issues/issue-17383.rs b/src/test/ui/parser/issues/issue-17383.rs
deleted file mode 100644
index 7bf0e64f2..000000000
--- a/src/test/ui/parser/issues/issue-17383.rs
+++ /dev/null
@@ -1,7 +0,0 @@
-enum X {
- A = 3,
- //~^ ERROR custom discriminant values are not allowed in enums with tuple or struct variants
- B(usize)
-}
-
-fn main() {}
diff --git a/src/test/ui/parser/issues/issue-17383.stderr b/src/test/ui/parser/issues/issue-17383.stderr
deleted file mode 100644
index 265d6e148..000000000
--- a/src/test/ui/parser/issues/issue-17383.stderr
+++ /dev/null
@@ -1,15 +0,0 @@
-error[E0658]: custom discriminant values are not allowed in enums with tuple or struct variants
- --> $DIR/issue-17383.rs:2:9
- |
-LL | A = 3,
- | ^ disallowed custom discriminant
-LL |
-LL | B(usize)
- | -------- tuple variant defined here
- |
- = note: see issue #60553 <https://github.com/rust-lang/rust/issues/60553> for more information
- = help: add `#![feature(arbitrary_enum_discriminant)]` to the crate attributes to enable
-
-error: aborting due to previous error
-
-For more information about this error, try `rustc --explain E0658`.
diff --git a/src/test/ui/parser/issues/issue-34222-1.stderr b/src/test/ui/parser/issues/issue-34222-1.stderr
index 0799656b0..b451484ba 100644
--- a/src/test/ui/parser/issues/issue-34222-1.stderr
+++ b/src/test/ui/parser/issues/issue-34222-1.stderr
@@ -4,7 +4,7 @@ error[E0585]: found a documentation comment that doesn't document anything
LL | /// comment
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
- = help: doc comments must come before what they document, maybe a comment was intended with `//`?
+ = help: doc comments must come before what they document, if a comment was intended use `//`
error: aborting due to previous error
diff --git a/src/test/ui/parser/issues/issue-48636.stderr b/src/test/ui/parser/issues/issue-48636.stderr
index 462723d1d..6177870d1 100644
--- a/src/test/ui/parser/issues/issue-48636.stderr
+++ b/src/test/ui/parser/issues/issue-48636.stderr
@@ -1,12 +1,14 @@
error[E0585]: found a documentation comment that doesn't document anything
--> $DIR/issue-48636.rs:7:5
|
+LL | struct S {
+ | - while parsing this struct
LL | x: u8
| - help: missing comma here: `,`
LL | /// The ID of the parent core
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
- = help: doc comments must come before what they document, maybe a comment was intended with `//`?
+ = help: doc comments must come before what they document, if a comment was intended use `//`
error: aborting due to previous error
diff --git a/src/test/ui/parser/issues/issue-63115-range-pat-interpolated.rs b/src/test/ui/parser/issues/issue-63115-range-pat-interpolated.rs
index 8efb3c73f..b6e5091b6 100644
--- a/src/test/ui/parser/issues/issue-63115-range-pat-interpolated.rs
+++ b/src/test/ui/parser/issues/issue-63115-range-pat-interpolated.rs
@@ -1,7 +1,6 @@
// check-pass
#![feature(exclusive_range_pattern)]
-#![feature(half_open_range_patterns)]
#![allow(ellipsis_inclusive_range_patterns)]
diff --git a/src/test/ui/parser/issues/issue-67377-invalid-syntax-in-enum-discriminant.stderr b/src/test/ui/parser/issues/issue-67377-invalid-syntax-in-enum-discriminant.stderr
index 85c9fe409..a00f37ed6 100644
--- a/src/test/ui/parser/issues/issue-67377-invalid-syntax-in-enum-discriminant.stderr
+++ b/src/test/ui/parser/issues/issue-67377-invalid-syntax-in-enum-discriminant.stderr
@@ -107,10 +107,10 @@ LL | V = [Vec::new; { [0].len() ].len() as isize,
| closing delimiter possibly meant for this
error[E0282]: type annotations needed
- --> $DIR/issue-67377-invalid-syntax-in-enum-discriminant.rs:15:29
+ --> $DIR/issue-67377-invalid-syntax-in-enum-discriminant.rs:15:26
|
LL | V = [Vec::new; { [].len() ].len() as isize,
- | ^^^ cannot infer type for type parameter `T`
+ | ^^ cannot infer type for type parameter `T`
error[E0282]: type annotations needed
--> $DIR/issue-67377-invalid-syntax-in-enum-discriminant.rs:26:14
diff --git a/src/test/ui/parser/issues/issue-68000-unicode-ident-after-missing-comma.stderr b/src/test/ui/parser/issues/issue-68000-unicode-ident-after-missing-comma.stderr
index ef365a616..adabb6859 100644
--- a/src/test/ui/parser/issues/issue-68000-unicode-ident-after-missing-comma.stderr
+++ b/src/test/ui/parser/issues/issue-68000-unicode-ident-after-missing-comma.stderr
@@ -7,6 +7,8 @@ LL | pub bar: Vec<i32>ö
error: expected `:`, found `}`
--> $DIR/issue-68000-unicode-ident-after-missing-comma.rs:4:1
|
+LL | pub struct Foo {
+ | --- while parsing this struct
LL | pub bar: Vec<i32>ö
| - expected `:`
LL |
diff --git a/src/test/ui/parser/issues/issue-8537.stderr b/src/test/ui/parser/issues/issue-8537.stderr
index 505d830ef..523cc9dc5 100644
--- a/src/test/ui/parser/issues/issue-8537.stderr
+++ b/src/test/ui/parser/issues/issue-8537.stderr
@@ -4,7 +4,7 @@ error[E0703]: invalid ABI: found `invalid-ab_isize`
LL | "invalid-ab_isize"
| ^^^^^^^^^^^^^^^^^^ invalid ABI
|
- = help: valid ABIs: Rust, C, C-unwind, cdecl, cdecl-unwind, stdcall, stdcall-unwind, fastcall, fastcall-unwind, vectorcall, vectorcall-unwind, thiscall, thiscall-unwind, aapcs, aapcs-unwind, win64, win64-unwind, sysv64, sysv64-unwind, ptx-kernel, msp430-interrupt, x86-interrupt, amdgpu-kernel, efiapi, avr-interrupt, avr-non-blocking-interrupt, C-cmse-nonsecure-call, wasm, system, system-unwind, rust-intrinsic, rust-call, platform-intrinsic, unadjusted, rust-cold
+ = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions.
error: aborting due to previous error
diff --git a/src/test/ui/parser/issues/issue-89574.stderr b/src/test/ui/parser/issues/issue-89574.stderr
index cbee3d351..fb1312c78 100644
--- a/src/test/ui/parser/issues/issue-89574.stderr
+++ b/src/test/ui/parser/issues/issue-89574.stderr
@@ -1,8 +1,8 @@
error: missing type for `const` item
- --> $DIR/issue-89574.rs:2:11
+ --> $DIR/issue-89574.rs:2:22
|
LL | const EMPTY_ARRAY = [];
- | ^^^^^^^^^^^ help: provide a type for the item: `EMPTY_ARRAY: <type>`
+ | ^ help: provide a type for the item: `: <type>`
error: aborting due to previous error
diff --git a/src/test/ui/parser/issues/issue-93282.rs b/src/test/ui/parser/issues/issue-93282.rs
index 261fcb5f9..274245f1a 100644
--- a/src/test/ui/parser/issues/issue-93282.rs
+++ b/src/test/ui/parser/issues/issue-93282.rs
@@ -12,4 +12,5 @@ fn foo() {
let x = 1;
bar('y, x);
//~^ ERROR expected
+ //~| ERROR mismatched types
}
diff --git a/src/test/ui/parser/issues/issue-93282.stderr b/src/test/ui/parser/issues/issue-93282.stderr
index ee554784b..c6140bb82 100644
--- a/src/test/ui/parser/issues/issue-93282.stderr
+++ b/src/test/ui/parser/issues/issue-93282.stderr
@@ -3,6 +3,11 @@ error: expected `while`, `for`, `loop` or `{` after a label
|
LL | f<'a,>
| ^ expected `while`, `for`, `loop` or `{` after a label
+ |
+help: add `'` to close the char literal
+ |
+LL | f<'a',>
+ | +
error: expected one of `.`, `:`, `;`, `?`, `for`, `loop`, `while`, `}`, or an operator, found `,`
--> $DIR/issue-93282.rs:2:9
@@ -20,6 +25,26 @@ error: expected `while`, `for`, `loop` or `{` after a label
|
LL | bar('y, x);
| ^ expected `while`, `for`, `loop` or `{` after a label
+ |
+help: add `'` to close the char literal
+ |
+LL | bar('y', x);
+ | +
+
+error[E0308]: mismatched types
+ --> $DIR/issue-93282.rs:13:9
+ |
+LL | bar('y, x);
+ | --- ^^ expected `usize`, found `char`
+ | |
+ | arguments to this function are incorrect
+ |
+note: function defined here
+ --> $DIR/issue-93282.rs:7:4
+ |
+LL | fn bar(a: usize, b: usize) -> usize {
+ | ^^^ --------
-error: aborting due to 3 previous errors
+error: aborting due to 4 previous errors
+For more information about this error, try `rustc --explain E0308`.