rust/tests/ui/borrowck/issue-52713-bug.rs

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// Regression test for a bug in #52713: this was an optimization for
// computing liveness that wound up accidentally causing the program
// below to be accepted.
fn foo<'a>(x: &'a mut u32) -> u32 {
let mut x = 22;
let y = &x;
if false {
return x;
}
x += 1; //~ ERROR
println!("{}", y);
return 0;
}
fn main() { }