69 lines
2.4 KiB
Rust
69 lines
2.4 KiB
Rust
// Copyright 2015 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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#![feature(rustc_attrs)]
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fn id<T>(x: T) -> T { x }
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fn f() {
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let old = ['o']; // statement 0
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let mut v1 = Vec::new(); // statement 1
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let mut v2 = Vec::new(); // statement 2
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let young = ['y']; // statement 3
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v2.push(&young[0]); // statement 4
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//~^ ERROR `young[..]` does not live long enough
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//~| NOTE borrowed value does not live long enough
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//~| NOTE values in a scope are dropped in the opposite order they are created
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let mut v3 = Vec::new(); // statement 5
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v3.push(&id('x')); // statement 6
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//~^ ERROR borrowed value does not live long enough
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//~| NOTE temporary value does not live long enough
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//~| NOTE temporary value dropped here while still borrowed
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//~| NOTE consider using a `let` binding to increase its lifetime
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{
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let mut v4 = Vec::new(); // (sub) statement 0
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v4.push(&id('y'));
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//~^ ERROR borrowed value does not live long enough
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//~| NOTE temporary value does not live long enough
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//~| NOTE temporary value dropped here while still borrowed
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//~| NOTE consider using a `let` binding to increase its lifetime
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v4.use_ref();
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} // (statement 7)
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//~^ NOTE temporary value needs to live until here
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let mut v5 = Vec::new(); // statement 8
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v5.push(&id('z'));
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//~^ ERROR borrowed value does not live long enough
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//~| NOTE temporary value does not live long enough
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//~| NOTE temporary value dropped here while still borrowed
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//~| NOTE consider using a `let` binding to increase its lifetime
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v1.push(&old[0]);
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(v1, v2, v3, /* v4 is above. */ v5).use_ref();
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}
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//~^ NOTE `young[..]` dropped here while still borrowed
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//~| NOTE temporary value needs to live until here
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//~| NOTE temporary value needs to live until here
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fn main() { #![rustc_error] // rust-lang/rust#49855
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f();
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}
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trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { } }
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impl<T> Fake for T { }
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