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60 lines
1.9 KiB
Rust
60 lines
1.9 KiB
Rust
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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{
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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 `young[_]` dropped here while still borrowed
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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 temporary value dropped while borrowed
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//~| NOTE creates a temporary value which is freed while still in use
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//~| NOTE temporary value is freed at the end of this statement
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//~| HELP consider using a `let` binding to create a longer lived value
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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 temporary value dropped while borrowed
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//~| NOTE creates a temporary value which is freed while still in use
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//~| NOTE temporary value is freed at the end of this statement
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//~| NOTE consider using a `let` binding to create a longer lived value
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v4.use_ref();
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//~^ NOTE borrow later used here
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} // (statement 7)
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let mut v5 = Vec::new(); // statement 8
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v5.push(&id('z'));
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//~^ ERROR temporary value dropped while borrowed
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//~| NOTE creates a temporary value which is freed while still in use
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//~| NOTE temporary value is freed at the end of this statement
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//~| HELP consider using a `let` binding to create a longer lived value
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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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//~^ NOTE borrow later used here
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//~| NOTE borrow later used here
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//~| NOTE borrow later used here
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}
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fn main() {
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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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