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fn identity(a: &u32) -> &u32 { a }
fn print_foo(f: &fn(&u32) -> &u32, x: &u32) {
print!("{}", (*f)(x));
}
fn main() {
let x = &4;
let f: fn(&u32) -> &u32 = identity;
// Didn't print 4 on optimized builds
print_foo(&f, x);
}
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