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// run-pass
#![allow(dead_code)]
#![allow(unused_variables)]
// Test case from #39963.
#[derive(Clone)]
struct Foo(Option<Box<Foo>>, Option<Box<Foo>>);
fn test(f: &mut Foo) {
match *f {
Foo(Some(ref mut left), Some(ref mut right)) => match **left {
Foo(Some(ref mut left), Some(ref mut right)) => panic!(),
_ => panic!(),
},
_ => panic!(),
}
}
fn main() {
}
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