rust/tests/ui/let-else/let-else-binding-explicit-mut-borrow.rs
2023-01-11 09:32:08 +00:00

14 lines
329 B
Rust

// Slightly different from explicit-mut-annotated -- this won't show an error until borrowck.
// Should it show a type error instead?
fn main() {
let Some(n): &mut Option<i32> = &mut &Some(5i32) else {
//~^ ERROR cannot borrow data in a `&` reference as mutable
return
};
*n += 1;
let _ = n;
}