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16 lines
472 B
Rust
16 lines
472 B
Rust
// Check that when making a ref mut binding with type `&mut T`, the
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// type `T` must match precisely the type `U` of the value being
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// matched, and in particular cannot be some supertype of `U`. Issue
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// #23116. This test focuses on a `let`.
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#![allow(dead_code)]
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struct S<'b>(&'b i32);
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impl<'b> S<'b> {
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fn bar<'a>(&'a mut self) -> &'a mut &'a i32 {
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let ref mut x = self.0;
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x
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//~^ ERROR lifetime may not live long enough
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}
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}
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fn main() {}
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