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Unrolled build for rust-lang#119323
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Rollup merge of rust-lang#119323 - lukas-code:test-never-to-infinite, r=compiler-errors

add test for coercing never to infinite type

Closes rust-lang#113197.

This was fixed in rust-lang#118308, probably rust-lang@1978168.
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rust-timer authored Dec 26, 2023
2 parents a75fed7 + 2903604 commit a084055
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Expand Up @@ -3,7 +3,7 @@ error[E0391]: cycle detected when computing layout of `Foo<()>`
= note: ...which requires computing layout of `<() as A>::Assoc`...
= note: ...which again requires computing layout of `Foo<()>`, completing the cycle
note: cycle used when elaborating drops for `main`
--> $DIR/recursive-type-2.rs:11:1
--> $DIR/recursive-type-binding.rs:11:1
|
LL | fn main() {
| ^^^^^^^^^
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16 changes: 16 additions & 0 deletions tests/ui/sized/recursive-type-coercion-from-never.rs
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// build-fail
//~^ ERROR cycle detected when computing layout of `Foo<()>`

// Regression test for a stack overflow: https://github.com/rust-lang/rust/issues/113197

trait A { type Assoc; }

impl A for () {
type Assoc = Foo<()>;
}

struct Foo<T: A>(T::Assoc);

fn main() {
Foo::<()>(todo!());
}
14 changes: 14 additions & 0 deletions tests/ui/sized/recursive-type-coercion-from-never.stderr
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error[E0391]: cycle detected when computing layout of `Foo<()>`
|
= note: ...which requires computing layout of `<() as A>::Assoc`...
= note: ...which again requires computing layout of `Foo<()>`, completing the cycle
note: cycle used when elaborating drops for `main`
--> $DIR/recursive-type-coercion-from-never.rs:14:1
|
LL | fn main() {
| ^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0391`.
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