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22 lines
643 B
Rust
22 lines
643 B
Rust
// Simplified regression test for #30438, inspired by arielb1.
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trait Trait { type Out; }
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struct Test<'a> { s: &'a str }
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fn silly<'y, 'z>(_s: &'y Test<'z>) -> &'y <Test<'z> as Trait>::Out where 'z: 'static {
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//~^ WARN unnecessary lifetime parameter `'z`
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let x = Test { s: "this cannot last" };
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&x
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//~^ ERROR: cannot return reference to local variable `x`
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}
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impl<'b> Trait for Test<'b> { type Out = Test<'b>; }
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fn main() {
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let orig = Test { s: "Hello World" };
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let r = silly(&orig);
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println!("{}", orig.s); // OK since `orig` is valid
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println!("{}", r.s); // Segfault (method does not return a sane value)
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}
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