20 lines
389 B
Rust
20 lines
389 B
Rust
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trait T {
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type U;
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fn f(&self) -> Self::U;
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}
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struct X<'a>(&'a mut i32);
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impl<'a> T for X<'a> {
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type U = &'a i32;
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fn f(&self) -> Self::U {
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self.0
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}
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//~^^^ ERROR cannot infer an appropriate lifetime for lifetime parameter `'a`
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//
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// Return type of `f` has lifetime `'a` but it tries to return `self.0` which
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// has lifetime `'_`.
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}
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fn main() {}
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