mirror of https://github.com/rust-lang/rust
45 lines
1.1 KiB
Rust
45 lines
1.1 KiB
Rust
#![feature(rustc_attrs)]
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#![allow(dead_code)]
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fn main() { #![rustc_error] // rust-lang/rust#49855
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// Original borrow ends at end of function
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let mut x = 1;
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let y = &mut x;
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//~^ mutable borrow occurs here
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let z = &x; //~ ERROR cannot borrow
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//~^ immutable borrow occurs here
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z.use_ref();
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y.use_mut();
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}
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fn foo() {
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match true {
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true => {
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// Original borrow ends at end of match arm
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let mut x = 1;
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let y = &x;
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//~^ immutable borrow occurs here
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let z = &mut x; //~ ERROR cannot borrow
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//~^ mutable borrow occurs here
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z.use_mut();
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y.use_ref();
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}
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false => ()
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}
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}
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fn bar() {
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// Original borrow ends at end of closure
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|| {
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let mut x = 1;
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let y = &mut x;
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//~^ first mutable borrow occurs here
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let z = &mut x; //~ ERROR cannot borrow
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//~^ second mutable borrow occurs here
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z.use_mut();
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y.use_mut();
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};
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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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