diff options
Diffstat (limited to 'tests/ui/rfc-2008-non-exhaustive/uninhabited')
24 files changed, 1197 insertions, 0 deletions
diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/auxiliary/uninhabited.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/auxiliary/uninhabited.rs new file mode 100644 index 000000000..a2735d4cb --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/auxiliary/uninhabited.rs @@ -0,0 +1,32 @@ +#![crate_type = "rlib"] +#![feature(never_type)] + +#[non_exhaustive] +pub enum UninhabitedEnum { +} + +#[non_exhaustive] +pub struct UninhabitedStruct { + _priv: !, +} + +#[non_exhaustive] +pub struct UninhabitedTupleStruct(!); + +pub enum UninhabitedVariants { + #[non_exhaustive] Tuple(!), + #[non_exhaustive] Struct { x: ! } +} + +pub enum PartiallyInhabitedVariants { + Tuple(u8), + #[non_exhaustive] Struct { x: ! } +} + +pub struct IndirectUninhabitedEnum(UninhabitedEnum); + +pub struct IndirectUninhabitedStruct(UninhabitedStruct); + +pub struct IndirectUninhabitedTupleStruct(UninhabitedTupleStruct); + +pub struct IndirectUninhabitedVariants(UninhabitedVariants); diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions.rs new file mode 100644 index 000000000..80b9dc4c1 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions.rs @@ -0,0 +1,38 @@ +// aux-build:uninhabited.rs +#![feature(never_type)] + +extern crate uninhabited; + +use uninhabited::{ + UninhabitedEnum, + UninhabitedStruct, + UninhabitedTupleStruct, + UninhabitedVariants, +}; + +// This test checks that uninhabited non-exhaustive types cannot coerce to any type, as the never +// type can. + +struct A; + +fn can_coerce_never_type_to_anything(x: !) -> A { + x +} + +fn cannot_coerce_empty_enum_to_anything(x: UninhabitedEnum) -> A { + x //~ ERROR mismatched types +} + +fn cannot_coerce_empty_tuple_struct_to_anything(x: UninhabitedTupleStruct) -> A { + x //~ ERROR mismatched types +} + +fn cannot_coerce_empty_struct_to_anything(x: UninhabitedStruct) -> A { + x //~ ERROR mismatched types +} + +fn cannot_coerce_enum_with_empty_variants_to_anything(x: UninhabitedVariants) -> A { + x //~ ERROR mismatched types +} + +fn main() {} diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions.stderr b/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions.stderr new file mode 100644 index 000000000..f8ed156b5 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions.stderr @@ -0,0 +1,35 @@ +error[E0308]: mismatched types + --> $DIR/coercions.rs:23:5 + | +LL | fn cannot_coerce_empty_enum_to_anything(x: UninhabitedEnum) -> A { + | - expected `A` because of return type +LL | x + | ^ expected struct `A`, found enum `UninhabitedEnum` + +error[E0308]: mismatched types + --> $DIR/coercions.rs:27:5 + | +LL | fn cannot_coerce_empty_tuple_struct_to_anything(x: UninhabitedTupleStruct) -> A { + | - expected `A` because of return type +LL | x + | ^ expected struct `A`, found struct `UninhabitedTupleStruct` + +error[E0308]: mismatched types + --> $DIR/coercions.rs:31:5 + | +LL | fn cannot_coerce_empty_struct_to_anything(x: UninhabitedStruct) -> A { + | - expected `A` because of return type +LL | x + | ^ expected struct `A`, found struct `UninhabitedStruct` + +error[E0308]: mismatched types + --> $DIR/coercions.rs:35:5 + | +LL | fn cannot_coerce_enum_with_empty_variants_to_anything(x: UninhabitedVariants) -> A { + | - expected `A` because of return type +LL | x + | ^ expected struct `A`, found enum `UninhabitedVariants` + +error: aborting due to 4 previous errors + +For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.rs new file mode 100644 index 000000000..6b911dd98 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.rs @@ -0,0 +1,45 @@ +#![feature(never_type)] + +#[non_exhaustive] +pub enum UninhabitedEnum { +} + +#[non_exhaustive] +pub struct UninhabitedTupleStruct(!); + +#[non_exhaustive] +pub struct UninhabitedStruct { + _priv: !, +} + +pub enum UninhabitedVariants { + #[non_exhaustive] Tuple(!), + #[non_exhaustive] Struct { x: ! } +} + +struct A; + +// This test checks that uninhabited non-exhaustive types defined in the same crate cannot coerce +// to any type, as the never type can. + +fn can_coerce_never_type_to_anything(x: !) -> A { + x +} + +fn cannot_coerce_empty_enum_to_anything(x: UninhabitedEnum) -> A { + x //~ ERROR mismatched types +} + +fn cannot_coerce_empty_tuple_struct_to_anything(x: UninhabitedTupleStruct) -> A { + x //~ ERROR mismatched types +} + +fn cannot_coerce_empty_struct_to_anything(x: UninhabitedStruct) -> A { + x //~ ERROR mismatched types +} + +fn cannot_coerce_enum_with_empty_variants_to_anything(x: UninhabitedVariants) -> A { + x //~ ERROR mismatched types +} + +fn main() {} diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.stderr b/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.stderr new file mode 100644 index 000000000..fd2c56974 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/coercions_same_crate.stderr @@ -0,0 +1,35 @@ +error[E0308]: mismatched types + --> $DIR/coercions_same_crate.rs:30:5 + | +LL | fn cannot_coerce_empty_enum_to_anything(x: UninhabitedEnum) -> A { + | - expected `A` because of return type +LL | x + | ^ expected struct `A`, found enum `UninhabitedEnum` + +error[E0308]: mismatched types + --> $DIR/coercions_same_crate.rs:34:5 + | +LL | fn cannot_coerce_empty_tuple_struct_to_anything(x: UninhabitedTupleStruct) -> A { + | - expected `A` because of return type +LL | x + | ^ expected struct `A`, found struct `UninhabitedTupleStruct` + +error[E0308]: mismatched types + --> $DIR/coercions_same_crate.rs:38:5 + | +LL | fn cannot_coerce_empty_struct_to_anything(x: UninhabitedStruct) -> A { + | - expected `A` because of return type +LL | x + | ^ expected struct `A`, found struct `UninhabitedStruct` + +error[E0308]: mismatched types + --> $DIR/coercions_same_crate.rs:42:5 + | +LL | fn cannot_coerce_enum_with_empty_variants_to_anything(x: UninhabitedVariants) -> A { + | - expected `A` because of return type +LL | x + | ^ expected struct `A`, found enum `UninhabitedVariants` + +error: aborting due to 4 previous errors + +For more information about this error, try `rustc --explain E0308`. diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match.rs new file mode 100644 index 000000000..98a7fdbc5 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match.rs @@ -0,0 +1,36 @@ +// aux-build:uninhabited.rs +#![feature(never_type)] + +extern crate uninhabited; + +use uninhabited::{ + IndirectUninhabitedEnum, + IndirectUninhabitedStruct, + IndirectUninhabitedTupleStruct, + IndirectUninhabitedVariants, +}; + +struct A; + +// This test checks that an empty match on a non-exhaustive uninhabited type through a level of +// indirection from an extern crate will not compile. + +fn cannot_empty_match_on_empty_enum_to_anything(x: IndirectUninhabitedEnum) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_empty_struct_to_anything(x: IndirectUninhabitedStruct) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_empty_tuple_struct_to_anything(x: IndirectUninhabitedTupleStruct) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_enum_with_empty_variants_struct_to_anything( + x: IndirectUninhabitedVariants, +) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn main() {} diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match.stderr b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match.stderr new file mode 100644 index 000000000..66e93291c --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match.stderr @@ -0,0 +1,79 @@ +error[E0004]: non-exhaustive patterns: type `IndirectUninhabitedEnum` is non-empty + --> $DIR/indirect_match.rs:19:11 + | +LL | match x {} + | ^ + | +note: `IndirectUninhabitedEnum` defined here + --> $DIR/auxiliary/uninhabited.rs:26:1 + | +LL | pub struct IndirectUninhabitedEnum(UninhabitedEnum); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `IndirectUninhabitedEnum` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `IndirectUninhabitedStruct` is non-empty + --> $DIR/indirect_match.rs:23:11 + | +LL | match x {} + | ^ + | +note: `IndirectUninhabitedStruct` defined here + --> $DIR/auxiliary/uninhabited.rs:28:1 + | +LL | pub struct IndirectUninhabitedStruct(UninhabitedStruct); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `IndirectUninhabitedStruct` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `IndirectUninhabitedTupleStruct` is non-empty + --> $DIR/indirect_match.rs:27:11 + | +LL | match x {} + | ^ + | +note: `IndirectUninhabitedTupleStruct` defined here + --> $DIR/auxiliary/uninhabited.rs:30:1 + | +LL | pub struct IndirectUninhabitedTupleStruct(UninhabitedTupleStruct); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `IndirectUninhabitedTupleStruct` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `IndirectUninhabitedVariants` is non-empty + --> $DIR/indirect_match.rs:33:11 + | +LL | match x {} + | ^ + | +note: `IndirectUninhabitedVariants` defined here + --> $DIR/auxiliary/uninhabited.rs:32:1 + | +LL | pub struct IndirectUninhabitedVariants(UninhabitedVariants); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `IndirectUninhabitedVariants` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error: aborting due to 4 previous errors + +For more information about this error, try `rustc --explain E0004`. diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_same_crate.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_same_crate.rs new file mode 100644 index 000000000..8f090fe88 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_same_crate.rs @@ -0,0 +1,51 @@ +#![feature(never_type)] + +#[non_exhaustive] +pub enum UninhabitedEnum { +} + +#[non_exhaustive] +pub struct UninhabitedStruct { + _priv: !, +} + +#[non_exhaustive] +pub struct UninhabitedTupleStruct(!); + +pub enum UninhabitedVariants { + #[non_exhaustive] Tuple(!), + #[non_exhaustive] Struct { x: ! } +} + +pub struct IndirectUninhabitedEnum(UninhabitedEnum); + +pub struct IndirectUninhabitedStruct(UninhabitedStruct); + +pub struct IndirectUninhabitedTupleStruct(UninhabitedTupleStruct); + +pub struct IndirectUninhabitedVariants(UninhabitedVariants); + +struct A; + +// This test checks that an empty match on a non-exhaustive uninhabited type through a level of +// indirection from the defining crate will not compile without `#![feature(exhaustive_patterns)]`. + +fn cannot_empty_match_on_empty_enum_to_anything(x: IndirectUninhabitedEnum) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_empty_struct_to_anything(x: IndirectUninhabitedStruct) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_empty_tuple_struct_to_anything(x: IndirectUninhabitedTupleStruct) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_enum_with_empty_variants_struct_to_anything( + x: IndirectUninhabitedVariants, +) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn main() {} diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_same_crate.stderr b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_same_crate.stderr new file mode 100644 index 000000000..c12190541 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_same_crate.stderr @@ -0,0 +1,79 @@ +error[E0004]: non-exhaustive patterns: type `IndirectUninhabitedEnum` is non-empty + --> $DIR/indirect_match_same_crate.rs:34:11 + | +LL | match x {} + | ^ + | +note: `IndirectUninhabitedEnum` defined here + --> $DIR/indirect_match_same_crate.rs:20:12 + | +LL | pub struct IndirectUninhabitedEnum(UninhabitedEnum); + | ^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `IndirectUninhabitedEnum` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `IndirectUninhabitedStruct` is non-empty + --> $DIR/indirect_match_same_crate.rs:38:11 + | +LL | match x {} + | ^ + | +note: `IndirectUninhabitedStruct` defined here + --> $DIR/indirect_match_same_crate.rs:22:12 + | +LL | pub struct IndirectUninhabitedStruct(UninhabitedStruct); + | ^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `IndirectUninhabitedStruct` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `IndirectUninhabitedTupleStruct` is non-empty + --> $DIR/indirect_match_same_crate.rs:42:11 + | +LL | match x {} + | ^ + | +note: `IndirectUninhabitedTupleStruct` defined here + --> $DIR/indirect_match_same_crate.rs:24:12 + | +LL | pub struct IndirectUninhabitedTupleStruct(UninhabitedTupleStruct); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `IndirectUninhabitedTupleStruct` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `IndirectUninhabitedVariants` is non-empty + --> $DIR/indirect_match_same_crate.rs:48:11 + | +LL | match x {} + | ^ + | +note: `IndirectUninhabitedVariants` defined here + --> $DIR/indirect_match_same_crate.rs:26:12 + | +LL | pub struct IndirectUninhabitedVariants(UninhabitedVariants); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `IndirectUninhabitedVariants` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error: aborting due to 4 previous errors + +For more information about this error, try `rustc --explain E0004`. diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_with_exhaustive_patterns.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_with_exhaustive_patterns.rs new file mode 100644 index 000000000..be86519ec --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_with_exhaustive_patterns.rs @@ -0,0 +1,40 @@ +// aux-build:uninhabited.rs +#![deny(unreachable_patterns)] +#![feature(exhaustive_patterns)] +#![feature(never_type)] + +extern crate uninhabited; + +use uninhabited::{ + IndirectUninhabitedEnum, + IndirectUninhabitedStruct, + IndirectUninhabitedTupleStruct, + IndirectUninhabitedVariants, +}; + +struct A; + +// This test checks that an empty match on a non-exhaustive uninhabited type through a level of +// indirection from an extern crate will not compile. In particular, this enables the +// `exhaustive_patterns` feature as this can change the branch used in the compiler to determine +// this. + +fn cannot_empty_match_on_empty_enum_to_anything(x: IndirectUninhabitedEnum) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_empty_struct_to_anything(x: IndirectUninhabitedStruct) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_empty_tuple_struct_to_anything(x: IndirectUninhabitedTupleStruct) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_enum_with_empty_variants_struct_to_anything( + x: IndirectUninhabitedVariants, +) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn main() {} diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_with_exhaustive_patterns.stderr b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_with_exhaustive_patterns.stderr new file mode 100644 index 000000000..ef97c1fa1 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_with_exhaustive_patterns.stderr @@ -0,0 +1,79 @@ +error[E0004]: non-exhaustive patterns: type `IndirectUninhabitedEnum` is non-empty + --> $DIR/indirect_match_with_exhaustive_patterns.rs:23:11 + | +LL | match x {} + | ^ + | +note: `IndirectUninhabitedEnum` defined here + --> $DIR/auxiliary/uninhabited.rs:26:1 + | +LL | pub struct IndirectUninhabitedEnum(UninhabitedEnum); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `IndirectUninhabitedEnum` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `IndirectUninhabitedStruct` is non-empty + --> $DIR/indirect_match_with_exhaustive_patterns.rs:27:11 + | +LL | match x {} + | ^ + | +note: `IndirectUninhabitedStruct` defined here + --> $DIR/auxiliary/uninhabited.rs:28:1 + | +LL | pub struct IndirectUninhabitedStruct(UninhabitedStruct); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `IndirectUninhabitedStruct` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `IndirectUninhabitedTupleStruct` is non-empty + --> $DIR/indirect_match_with_exhaustive_patterns.rs:31:11 + | +LL | match x {} + | ^ + | +note: `IndirectUninhabitedTupleStruct` defined here + --> $DIR/auxiliary/uninhabited.rs:30:1 + | +LL | pub struct IndirectUninhabitedTupleStruct(UninhabitedTupleStruct); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `IndirectUninhabitedTupleStruct` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `IndirectUninhabitedVariants` is non-empty + --> $DIR/indirect_match_with_exhaustive_patterns.rs:37:11 + | +LL | match x {} + | ^ + | +note: `IndirectUninhabitedVariants` defined here + --> $DIR/auxiliary/uninhabited.rs:32:1 + | +LL | pub struct IndirectUninhabitedVariants(UninhabitedVariants); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `IndirectUninhabitedVariants` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error: aborting due to 4 previous errors + +For more information about this error, try `rustc --explain E0004`. diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_with_exhaustive_patterns_same_crate.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_with_exhaustive_patterns_same_crate.rs new file mode 100644 index 000000000..60289aa78 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/indirect_match_with_exhaustive_patterns_same_crate.rs @@ -0,0 +1,57 @@ +// check-pass + +#![deny(unreachable_patterns)] +#![feature(exhaustive_patterns)] +#![feature(never_type)] + +#[non_exhaustive] +pub enum UninhabitedEnum { +} + +#[non_exhaustive] +pub struct UninhabitedStruct { + _priv: !, +} + +#[non_exhaustive] +pub struct UninhabitedTupleStruct(!); + +pub enum UninhabitedVariants { + #[non_exhaustive] Tuple(!), + #[non_exhaustive] Struct { x: ! } +} + +pub struct IndirectUninhabitedEnum(UninhabitedEnum); + +pub struct IndirectUninhabitedStruct(UninhabitedStruct); + +pub struct IndirectUninhabitedTupleStruct(UninhabitedTupleStruct); + +pub struct IndirectUninhabitedVariants(UninhabitedVariants); + +struct A; + +// This test checks that an empty match on a non-exhaustive uninhabited type from the defining crate +// will compile. In particular, this enables the `exhaustive_patterns` feature as this can +// change the branch used in the compiler to determine this. +// Codegen is skipped because tests with long names can cause issues on Windows CI, see #60648. + +fn cannot_empty_match_on_empty_enum_to_anything(x: IndirectUninhabitedEnum) -> A { + match x {} +} + +fn cannot_empty_match_on_empty_struct_to_anything(x: IndirectUninhabitedStruct) -> A { + match x {} +} + +fn cannot_empty_match_on_empty_tuple_struct_to_anything(x: IndirectUninhabitedTupleStruct) -> A { + match x {} +} + +fn cannot_empty_match_on_enum_with_empty_variants_struct_to_anything( + x: IndirectUninhabitedVariants, +) -> A { + match x {} +} + +fn main() {} diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/issue-65157-repeated-match-arm.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/issue-65157-repeated-match-arm.rs new file mode 100644 index 000000000..230ac7529 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/issue-65157-repeated-match-arm.rs @@ -0,0 +1,21 @@ +// aux-build:uninhabited.rs +#![deny(unreachable_patterns)] +#![feature(never_type)] + +extern crate uninhabited; + +use uninhabited::PartiallyInhabitedVariants; + +// This test checks a redundant/useless pattern of a non-exhaustive enum/variant is still +// warned against. + +pub fn foo(x: PartiallyInhabitedVariants) { + match x { + PartiallyInhabitedVariants::Struct { .. } => {}, + PartiallyInhabitedVariants::Struct { .. } => {}, + //~^ ERROR unreachable pattern + _ => {}, + } +} + +fn main() { } diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/issue-65157-repeated-match-arm.stderr b/tests/ui/rfc-2008-non-exhaustive/uninhabited/issue-65157-repeated-match-arm.stderr new file mode 100644 index 000000000..f39e6ee29 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/issue-65157-repeated-match-arm.stderr @@ -0,0 +1,14 @@ +error: unreachable pattern + --> $DIR/issue-65157-repeated-match-arm.rs:15:9 + | +LL | PartiallyInhabitedVariants::Struct { .. } => {}, + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +note: the lint level is defined here + --> $DIR/issue-65157-repeated-match-arm.rs:2:9 + | +LL | #![deny(unreachable_patterns)] + | ^^^^^^^^^^^^^^^^^^^^ + +error: aborting due to previous error + diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/match.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match.rs new file mode 100644 index 000000000..e54098d4d --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match.rs @@ -0,0 +1,34 @@ +// aux-build:uninhabited.rs +#![feature(never_type)] + +extern crate uninhabited; + +use uninhabited::{ + UninhabitedEnum, + UninhabitedStruct, + UninhabitedTupleStruct, + UninhabitedVariants, +}; + +struct A; + +// This test checks that an empty match on a non-exhaustive uninhabited type from an extern crate +// will not compile. + +fn cannot_empty_match_on_empty_enum_to_anything(x: UninhabitedEnum) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_empty_struct_to_anything(x: UninhabitedStruct) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_empty_tuple_struct_to_anything(x: UninhabitedTupleStruct) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_enum_with_empty_variants_struct_to_anything(x: UninhabitedVariants) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn main() {} diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/match.stderr b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match.stderr new file mode 100644 index 000000000..a9c54af04 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match.stderr @@ -0,0 +1,83 @@ +error[E0004]: non-exhaustive patterns: type `UninhabitedEnum` is non-empty + --> $DIR/match.rs:19:11 + | +LL | match x {} + | ^ + | +note: `UninhabitedEnum` defined here + --> $DIR/auxiliary/uninhabited.rs:5:1 + | +LL | pub enum UninhabitedEnum { + | ^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `UninhabitedEnum`, which is marked as non-exhaustive +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `UninhabitedStruct` is non-empty + --> $DIR/match.rs:23:11 + | +LL | match x {} + | ^ + | +note: `UninhabitedStruct` defined here + --> $DIR/auxiliary/uninhabited.rs:9:1 + | +LL | pub struct UninhabitedStruct { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `UninhabitedStruct` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `UninhabitedTupleStruct` is non-empty + --> $DIR/match.rs:27:11 + | +LL | match x {} + | ^ + | +note: `UninhabitedTupleStruct` defined here + --> $DIR/auxiliary/uninhabited.rs:14:1 + | +LL | pub struct UninhabitedTupleStruct(!); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `UninhabitedTupleStruct` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: `UninhabitedVariants::Tuple(_)` and `UninhabitedVariants::Struct { .. }` not covered + --> $DIR/match.rs:31:11 + | +LL | match x {} + | ^ patterns `UninhabitedVariants::Tuple(_)` and `UninhabitedVariants::Struct { .. }` not covered + | +note: `UninhabitedVariants` defined here + --> $DIR/auxiliary/uninhabited.rs:17:23 + | +LL | pub enum UninhabitedVariants { + | ---------------------------- +LL | #[non_exhaustive] Tuple(!), + | ^^^^^ not covered +LL | #[non_exhaustive] Struct { x: ! } + | ^^^^^^ not covered + = note: the matched value is of type `UninhabitedVariants` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern, a match arm with multiple or-patterns as shown, or multiple match arms + | +LL ~ match x { +LL + UninhabitedVariants::Tuple(_) | UninhabitedVariants::Struct { .. } => todo!(), +LL ~ } + | + +error: aborting due to 4 previous errors + +For more information about this error, try `rustc --explain E0004`. diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_same_crate.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_same_crate.rs new file mode 100644 index 000000000..ebbdfba15 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_same_crate.rs @@ -0,0 +1,41 @@ +#![feature(never_type)] + +#[non_exhaustive] +pub enum UninhabitedEnum { +} + +#[non_exhaustive] +pub struct UninhabitedStruct { + _priv: !, +} + +#[non_exhaustive] +pub struct UninhabitedTupleStruct(!); + +pub enum UninhabitedVariants { + #[non_exhaustive] Tuple(!), + #[non_exhaustive] Struct { x: ! } +} + +struct A; + +// This test checks that an empty match on a non-exhaustive uninhabited type from the defining crate +// will compile. + +fn cannot_empty_match_on_empty_enum_to_anything(x: UninhabitedEnum) -> A { + match x {} +} + +fn cannot_empty_match_on_empty_struct_to_anything(x: UninhabitedStruct) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_empty_tuple_struct_to_anything(x: UninhabitedTupleStruct) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_enum_with_empty_variants_struct_to_anything(x: UninhabitedVariants) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn main() {} diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_same_crate.stderr b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_same_crate.stderr new file mode 100644 index 000000000..ec2a2f6f0 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_same_crate.stderr @@ -0,0 +1,64 @@ +error[E0004]: non-exhaustive patterns: type `UninhabitedStruct` is non-empty + --> $DIR/match_same_crate.rs:30:11 + | +LL | match x {} + | ^ + | +note: `UninhabitedStruct` defined here + --> $DIR/match_same_crate.rs:8:12 + | +LL | pub struct UninhabitedStruct { + | ^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `UninhabitedStruct` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `UninhabitedTupleStruct` is non-empty + --> $DIR/match_same_crate.rs:34:11 + | +LL | match x {} + | ^ + | +note: `UninhabitedTupleStruct` defined here + --> $DIR/match_same_crate.rs:13:12 + | +LL | pub struct UninhabitedTupleStruct(!); + | ^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `UninhabitedTupleStruct` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: `UninhabitedVariants::Tuple(_)` and `UninhabitedVariants::Struct { .. }` not covered + --> $DIR/match_same_crate.rs:38:11 + | +LL | match x {} + | ^ patterns `UninhabitedVariants::Tuple(_)` and `UninhabitedVariants::Struct { .. }` not covered + | +note: `UninhabitedVariants` defined here + --> $DIR/match_same_crate.rs:16:23 + | +LL | pub enum UninhabitedVariants { + | ------------------- +LL | #[non_exhaustive] Tuple(!), + | ^^^^^ not covered +LL | #[non_exhaustive] Struct { x: ! } + | ^^^^^^ not covered + = note: the matched value is of type `UninhabitedVariants` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern, a match arm with multiple or-patterns as shown, or multiple match arms + | +LL ~ match x { +LL + UninhabitedVariants::Tuple(_) | UninhabitedVariants::Struct { .. } => todo!(), +LL ~ } + | + +error: aborting due to 3 previous errors + +For more information about this error, try `rustc --explain E0004`. diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_with_exhaustive_patterns.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_with_exhaustive_patterns.rs new file mode 100644 index 000000000..900dfff65 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_with_exhaustive_patterns.rs @@ -0,0 +1,37 @@ +// aux-build:uninhabited.rs +#![deny(unreachable_patterns)] +#![feature(exhaustive_patterns)] +#![feature(never_type)] + +extern crate uninhabited; + +use uninhabited::{ + UninhabitedEnum, + UninhabitedStruct, + UninhabitedTupleStruct, + UninhabitedVariants, +}; + +struct A; + +// This test checks that an empty match on a non-exhaustive uninhabited type from an extern crate +// will not compile. In particular, this enables the `exhaustive_patterns` feature as this can +// change the branch used in the compiler to determine this. + +fn cannot_empty_match_on_empty_enum_to_anything(x: UninhabitedEnum) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_empty_struct_to_anything(x: UninhabitedStruct) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_empty_tuple_struct_to_anything(x: UninhabitedTupleStruct) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn cannot_empty_match_on_enum_with_empty_variants_struct_to_anything(x: UninhabitedVariants) -> A { + match x {} //~ ERROR non-exhaustive patterns +} + +fn main() {} diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_with_exhaustive_patterns.stderr b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_with_exhaustive_patterns.stderr new file mode 100644 index 000000000..b6b777ec5 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_with_exhaustive_patterns.stderr @@ -0,0 +1,83 @@ +error[E0004]: non-exhaustive patterns: type `UninhabitedEnum` is non-empty + --> $DIR/match_with_exhaustive_patterns.rs:22:11 + | +LL | match x {} + | ^ + | +note: `UninhabitedEnum` defined here + --> $DIR/auxiliary/uninhabited.rs:5:1 + | +LL | pub enum UninhabitedEnum { + | ^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `UninhabitedEnum`, which is marked as non-exhaustive +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `UninhabitedStruct` is non-empty + --> $DIR/match_with_exhaustive_patterns.rs:26:11 + | +LL | match x {} + | ^ + | +note: `UninhabitedStruct` defined here + --> $DIR/auxiliary/uninhabited.rs:9:1 + | +LL | pub struct UninhabitedStruct { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `UninhabitedStruct` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: type `UninhabitedTupleStruct` is non-empty + --> $DIR/match_with_exhaustive_patterns.rs:30:11 + | +LL | match x {} + | ^ + | +note: `UninhabitedTupleStruct` defined here + --> $DIR/auxiliary/uninhabited.rs:14:1 + | +LL | pub struct UninhabitedTupleStruct(!); + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + = note: the matched value is of type `UninhabitedTupleStruct` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern as shown + | +LL ~ match x { +LL + _ => todo!(), +LL ~ } + | + +error[E0004]: non-exhaustive patterns: `UninhabitedVariants::Tuple(_)` and `UninhabitedVariants::Struct { .. }` not covered + --> $DIR/match_with_exhaustive_patterns.rs:34:11 + | +LL | match x {} + | ^ patterns `UninhabitedVariants::Tuple(_)` and `UninhabitedVariants::Struct { .. }` not covered + | +note: `UninhabitedVariants` defined here + --> $DIR/auxiliary/uninhabited.rs:17:23 + | +LL | pub enum UninhabitedVariants { + | ---------------------------- +LL | #[non_exhaustive] Tuple(!), + | ^^^^^ not covered +LL | #[non_exhaustive] Struct { x: ! } + | ^^^^^^ not covered + = note: the matched value is of type `UninhabitedVariants` +help: ensure that all possible cases are being handled by adding a match arm with a wildcard pattern, a match arm with multiple or-patterns as shown, or multiple match arms + | +LL ~ match x { +LL + UninhabitedVariants::Tuple(_) | UninhabitedVariants::Struct { .. } => todo!(), +LL ~ } + | + +error: aborting due to 4 previous errors + +For more information about this error, try `rustc --explain E0004`. diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_with_exhaustive_patterns_same_crate.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_with_exhaustive_patterns_same_crate.rs new file mode 100644 index 000000000..de5530485 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/match_with_exhaustive_patterns_same_crate.rs @@ -0,0 +1,47 @@ +// check-pass + +#![deny(unreachable_patterns)] +#![feature(exhaustive_patterns)] +#![feature(never_type)] + +#[non_exhaustive] +pub enum UninhabitedEnum { +} + +#[non_exhaustive] +pub struct UninhabitedStruct { + _priv: !, +} + +#[non_exhaustive] +pub struct UninhabitedTupleStruct(!); + +pub enum UninhabitedVariants { + #[non_exhaustive] Tuple(!), + #[non_exhaustive] Struct { x: ! } +} + +struct A; + +// This test checks that an empty match on a non-exhaustive uninhabited type from the defining crate +// will compile. In particular, this enables the `exhaustive_patterns` feature as this can +// change the branch used in the compiler to determine this. +// Codegen is skipped because tests with long names can cause issues on Windows CI, see #60648. + +fn cannot_empty_match_on_empty_enum_to_anything(x: UninhabitedEnum) -> A { + match x {} +} + +fn cannot_empty_match_on_empty_struct_to_anything(x: UninhabitedStruct) -> A { + match x {} +} + +fn cannot_empty_match_on_empty_tuple_struct_to_anything(x: UninhabitedTupleStruct) -> A { + match x {} +} + +fn cannot_empty_match_on_enum_with_empty_variants_struct_to_anything(x: UninhabitedVariants) -> A { + match x {} +} + +fn main() {} diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/patterns.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/patterns.rs new file mode 100644 index 000000000..221b5cf6b --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/patterns.rs @@ -0,0 +1,59 @@ +// aux-build:uninhabited.rs +// build-pass (FIXME(62277): could be check-pass?) +#![deny(unreachable_patterns)] +#![feature(exhaustive_patterns)] + +extern crate uninhabited; + +use uninhabited::{ + PartiallyInhabitedVariants, + UninhabitedEnum, + UninhabitedStruct, + UninhabitedTupleStruct, + UninhabitedVariants, +}; + +fn uninhabited_enum() -> Option<UninhabitedEnum> { + None +} + +fn uninhabited_variant() -> Option<UninhabitedVariants> { + None +} + +fn partially_inhabited_variant() -> PartiallyInhabitedVariants { + PartiallyInhabitedVariants::Tuple(3) +} + +fn uninhabited_struct() -> Option<UninhabitedStruct> { + None +} + +fn uninhabited_tuple_struct() -> Option<UninhabitedTupleStruct> { + None +} + +// This test checks that non-exhaustive types that would normally be considered uninhabited within +// the defining crate are not considered uninhabited from extern crates. + +fn main() { + match uninhabited_enum() { + Some(_x) => (), // This line would normally error. + None => (), + } + + match uninhabited_variant() { + Some(_x) => (), // This line would normally error. + None => (), + } + + // This line would normally error. + while let PartiallyInhabitedVariants::Struct { x, .. } = partially_inhabited_variant() { + } + + while let Some(_x) = uninhabited_struct() { // This line would normally error. + } + + while let Some(_x) = uninhabited_tuple_struct() { // This line would normally error. + } +} diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/patterns_same_crate.rs b/tests/ui/rfc-2008-non-exhaustive/uninhabited/patterns_same_crate.rs new file mode 100644 index 000000000..ffc496a97 --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/patterns_same_crate.rs @@ -0,0 +1,70 @@ +#![deny(unreachable_patterns)] +#![feature(exhaustive_patterns)] +#![feature(never_type)] + +#[non_exhaustive] +pub enum UninhabitedEnum { +} + +#[non_exhaustive] +pub struct UninhabitedTupleStruct(!); + +#[non_exhaustive] +pub struct UninhabitedStruct { + _priv: !, +} + +pub enum UninhabitedVariants { + #[non_exhaustive] Tuple(!), + #[non_exhaustive] Struct { x: ! } +} + +pub enum PartiallyInhabitedVariants { + Tuple(u8), + #[non_exhaustive] Struct { x: ! } +} + +fn uninhabited_enum() -> Option<UninhabitedEnum> { + None +} + +fn uninhabited_variant() -> Option<UninhabitedVariants> { + None +} + +fn partially_inhabited_variant() -> PartiallyInhabitedVariants { + PartiallyInhabitedVariants::Tuple(3) +} + +fn uninhabited_struct() -> Option<UninhabitedStruct> { + None +} + +fn uninhabited_tuple_struct() -> Option<UninhabitedTupleStruct> { + None +} + +// This test checks that non-exhaustive types that would normally be considered uninhabited within +// the defining crate are still considered uninhabited. + +fn main() { + match uninhabited_enum() { + Some(_x) => (), //~ ERROR unreachable pattern + None => (), + } + + match uninhabited_variant() { + Some(_x) => (), //~ ERROR unreachable pattern + None => (), + } + + while let PartiallyInhabitedVariants::Struct { x } = partially_inhabited_variant() { + //~^ ERROR unreachable pattern + } + + while let Some(_x) = uninhabited_struct() { //~ ERROR unreachable pattern + } + + while let Some(_x) = uninhabited_tuple_struct() { //~ ERROR unreachable pattern + } +} diff --git a/tests/ui/rfc-2008-non-exhaustive/uninhabited/patterns_same_crate.stderr b/tests/ui/rfc-2008-non-exhaustive/uninhabited/patterns_same_crate.stderr new file mode 100644 index 000000000..8bfd6e91f --- /dev/null +++ b/tests/ui/rfc-2008-non-exhaustive/uninhabited/patterns_same_crate.stderr @@ -0,0 +1,38 @@ +error: unreachable pattern + --> $DIR/patterns_same_crate.rs:52:9 + | +LL | Some(_x) => (), + | ^^^^^^^^ + | +note: the lint level is defined here + --> $DIR/patterns_same_crate.rs:1:9 + | +LL | #![deny(unreachable_patterns)] + | ^^^^^^^^^^^^^^^^^^^^ + +error: unreachable pattern + --> $DIR/patterns_same_crate.rs:57:9 + | +LL | Some(_x) => (), + | ^^^^^^^^ + +error: unreachable pattern + --> $DIR/patterns_same_crate.rs:61:15 + | +LL | while let PartiallyInhabitedVariants::Struct { x } = partially_inhabited_variant() { + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +error: unreachable pattern + --> $DIR/patterns_same_crate.rs:65:15 + | +LL | while let Some(_x) = uninhabited_struct() { + | ^^^^^^^^ + +error: unreachable pattern + --> $DIR/patterns_same_crate.rs:68:15 + | +LL | while let Some(_x) = uninhabited_tuple_struct() { + | ^^^^^^^^ + +error: aborting due to 5 previous errors + |