rust/tests/ui/borrowck/borrowck-closures-mut-of-mut.rs
2023-01-11 09:32:08 +00:00

21 lines
394 B
Rust

// Tests that two closures cannot simultaneously both have mutable
// access to the variable. Related to issue #6801.
fn get(x: &isize) -> isize {
*x
}
fn set(x: &mut isize) {
*x = 4;
}
fn a(x: &mut isize) {
let mut c1 = || set(&mut *x);
let mut c2 = || set(&mut *x);
//~^ ERROR two closures require unique access to `x` at the same time
c2(); c1();
}
fn main() {
}