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Unrolled build for rust-lang#133467
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Rollup merge of rust-lang#133467 - Enselic:recurse-tests, r=lcnr

tests: Add recursive associated type bound regression tests

Add regression tests for rust-lang#129541 as requested in rust-lang#129541 (comment).

Closes rust-lang#129541

r? ``@lcnr``
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rust-timer authored Nov 26, 2024
2 parents f2abf82 + b77d8fa commit 3b8a688
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// Regression test for #129541
//~^ ERROR cycle detected when computing layout of `<[Hello] as Normalize>::Assoc` [E0391]

trait Bound {}
trait Normalize {
type Assoc;
}

impl<T: Bound> Normalize for T {
type Assoc = T;
}

impl<T: Bound> Normalize for [T] {
type Assoc = T;
}

impl Bound for Hello {}
enum Hello {
Variant(<[Hello] as Normalize>::Assoc),
}

fn main() {}
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error[E0391]: cycle detected when computing layout of `<[Hello] as Normalize>::Assoc`
|
= note: ...which requires computing layout of `Hello`...
= note: ...which again requires computing layout of `<[Hello] as Normalize>::Assoc`, completing the cycle
= note: cycle used when computing layout of `Hello`
= 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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// Regression test for #129541

//@ check-pass

trait Bound {}
trait Normalize {
type Assoc;
}

impl<T: Bound> Normalize for T {
type Assoc = T;
}

impl<T: Bound> Normalize for [T] {
type Assoc = T;
}

impl Bound for Hello {}
struct Hello {
a: <[Hello] as Normalize>::Assoc,
}

fn main() {}
19 changes: 19 additions & 0 deletions tests/ui/traits/solver-cycles/129541-recursive-struct.rs
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// Regression test for #129541

//@ check-pass

trait Bound {}
trait Normalize {
type Assoc;
}

impl<T: Bound> Normalize for [T] {
type Assoc = T;
}

impl Bound for Hello {}
struct Hello {
a: <[Hello] as Normalize>::Assoc,
}

fn main() {}

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