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// build-fail
// compile-flags: -Copt-level=0
//~^^ ERROR overflow evaluating the requirement
fn main() {
let mut iter = 0u8..1;
func(&mut iter)
}
fn func<T: Iterator<Item = u8>>(iter: &mut T) { //~ WARN function cannot return without recursing
func(&mut iter.map(|x| x + 1))
}
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