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rust/src/test/ui/closures/closure-immutable-outer-variable.fixed

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// run-rustfix
// Point at the captured immutable outer variable
fn foo(mut f: Box<FnMut()>) {
f();
}
fn main() {
let mut y = true;
foo(Box::new(move || y = false) as Box<_>); //~ ERROR cannot assign to captured outer variable
}