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22 lines
508 B
Rust
22 lines
508 B
Rust
// Test that we do not allow the region `'x` to escape in the impl
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// trait **even though** `'y` escapes, which outlives `'x`.
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//
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// See https://github.com/rust-lang/rust/issues/46541 for more details.
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#![allow(dead_code)]
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use std::cell::Cell;
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trait Trait<'a> { }
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impl<'a, 'b> Trait<'b> for Cell<&'a u32> { }
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fn foo<'x, 'y>(x: Cell<&'x u32>) -> impl Trait<'y>
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where 'x: 'y
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{
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x
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//~^ ERROR hidden type for `impl Trait<'y>` captures lifetime that does not appear in bounds [E0700]
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}
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fn main() { }
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