2 // compile-flags: -Zinline-mir=no
3 // error-pattern: overflow evaluating the requirement `(): Sized`
4 // error-pattern: function cannot return without recursing
5 // normalize-stderr-test: "long-type-\d+" -> "long-type-hash"
7 // Regression test for #91949.
8 // This hanged *forever* on 1.56, fixed by #90423.
10 #![recursion_limit = "256"]
14 struct IteratorOfWrapped<T, I: Iterator<Item = T>>(I);
16 impl<T, I: Iterator<Item = T>> Iterator for IteratorOfWrapped<T, I> {
17 type Item = Wrapped<T>;
18 fn next(&mut self) -> Option<Wrapped<T>> {
19 self.0.next().map(Wrapped)
23 fn recurse<T>(elements: T) -> Vec<char>
25 T: Iterator<Item = ()>,
27 recurse(IteratorOfWrapped(elements).map(|t| t.0))
31 recurse(std::iter::empty());