mirror of https://github.com/rust-lang/rust
15 lines
381 B
Rust
15 lines
381 B
Rust
// Check mutable bindings cannot be mutated by an if-let guard.
|
|
|
|
#![feature(if_let_guard)]
|
|
|
|
fn main() {
|
|
let x: Option<Option<i32>> = Some(Some(6));
|
|
match x {
|
|
Some(mut y) if let Some(ref mut z) = y => {
|
|
//~^ ERROR cannot borrow `y.0` as mutable, as it is immutable for the pattern guard
|
|
let _: &mut i32 = z;
|
|
}
|
|
_ => {}
|
|
}
|
|
}
|