ce2ae62d68
Define the `named_static_lifetimes` lint This lint will replace the existing hard-warning. Replace the named static lifetime hard-warning with the new lint Update the UI tests for the `named_static_lifetimes` lint Remove the direct dependency on `rustc_lint_defs` fix build Signed-off-by: Zhi Qi <qizhi@pingcap.com> use "UNUSED_LIFETIMES" instead Signed-off-by: Zhi Qi <qizhi@pingcap.com> update 1 test and fix typo Signed-off-by: Zhi Qi <qizhi@pingcap.com> update tests Signed-off-by: Zhi Qi <qizhi@pingcap.com> fix tests: add extra blank line Signed-off-by: Zhi Qi <qizhi@pingcap.com>
21 lines
593 B
Rust
21 lines
593 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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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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