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#![feature(if_let_guard, let_chains)]
fn main() {
let mut x = Some(String::new());
let ref mut y @ ref mut z = x;
//~^ ERROR: mutable more than once
let Some(ref mut y @ ref mut z) = x else { return };
//~^ ERROR: mutable more than once
if let Some(ref mut y @ ref mut z) = x {}
//~^ ERROR: mutable more than once
if let Some(ref mut y @ ref mut z) = x && true {}
//~^ ERROR: mutable more than once
if let Some(_) = Some(()) && let Some(ref mut y @ ref mut z) = x && true {}
//~^ ERROR: mutable more than once
while let Some(ref mut y @ ref mut z) = x {}
//~^ ERROR: mutable more than once
while let Some(ref mut y @ ref mut z) = x && true {}
//~^ ERROR: mutable more than once
match x {
ref mut y @ ref mut z => {} //~ ERROR: mutable more than once
}
match () {
() if let Some(ref mut y @ ref mut z) = x => {} //~ ERROR: mutable more than once
_ => {}
}
}
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