31 lines
707 B
Rust
31 lines
707 B
Rust
//@ build-fail
|
|
//@ compile-flags: -Zinline-mir=no
|
|
|
|
// Regression test for #91949.
|
|
// This hanged *forever* on 1.56, fixed by #90423.
|
|
|
|
#![recursion_limit = "256"]
|
|
|
|
struct Wrapped<T>(T);
|
|
|
|
struct IteratorOfWrapped<T, I: Iterator<Item = T>>(I);
|
|
|
|
impl<T, I: Iterator<Item = T>> Iterator for IteratorOfWrapped<T, I> {
|
|
type Item = Wrapped<T>;
|
|
fn next(&mut self) -> Option<Wrapped<T>> {
|
|
self.0.next().map(Wrapped)
|
|
}
|
|
}
|
|
|
|
fn recurse<T>(elements: T) -> Vec<char>
|
|
//~^ WARN function cannot return without recursing
|
|
where
|
|
T: Iterator<Item = ()>,
|
|
{
|
|
recurse(IteratorOfWrapped(elements).map(|t| t.0))
|
|
//~^ ERROR reached the type-length limit
|
|
}
|
|
|
|
fn main() {
|
|
recurse(std::iter::empty());
|
|
}
|