26 lines
913 B
Rust
26 lines
913 B
Rust
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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// 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 //~ ERROR mismatched types
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}
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}
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fn main() {}
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