32 lines
1007 B
Rust
32 lines
1007 B
Rust
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// Copyright 2012 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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// Test that assignments to an `&mut` pointer which is found in a
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// borrowed (but otherwise non-aliasable) location is illegal.
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struct S<'a> {
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pointer: &'a mut int
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}
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fn copy_borrowed_ptr<'a,'b>(p: &'a mut S<'b>) -> S<'b> {
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S { pointer: &mut *p.pointer } //~ ERROR lifetime of `p` is too short to guarantee its contents can be safely reborrowed
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}
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fn main() {
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let mut x = 1;
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{
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let mut y = S { pointer: &mut x };
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let z = copy_borrowed_ptr(&mut y);
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*y.pointer += 1;
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*z.pointer += 1;
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}
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}
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