mirror of https://github.com/rust-lang/rust.git
34 lines
775 B
Rust
34 lines
775 B
Rust
//@ check-pass
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//@ revisions: current next
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//@[next] compile-flags: -Znext-solver
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//@ ignore-compare-mode-next-solver (explicit revisions)
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// When proving auto trait bounds, make sure that we depend on auto trait
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// leakage if we can also prove it via an item bound.
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fn is_send<T: Send>(_: T) {}
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fn direct() -> impl Send {
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is_send(check(false)); // leaks auto traits, depends on `check`
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1u16
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}
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trait Indir: Send {}
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impl Indir for u32 {}
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fn indir() -> impl Indir {
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is_send(check(false)); // leaks auto traits, depends on `check`
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1u32
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}
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fn check(b: bool) -> impl Sized {
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if b {
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// must not leak auto traits, as we otherwise get a query cycle.
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is_send(direct());
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is_send(indir());
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}
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1u64
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}
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fn main() {
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check(true);
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}
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