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//@ build-fail
//@ compile-flags: -Copt-level=0 --diagnostic-width=100 -Zwrite-long-types-to-disk=yes
fn main() {
rec(Empty);
}
struct Empty;
impl Iterator for Empty {
type Item = ();
fn next<'a>(&'a mut self) -> core::option::Option<()> {
None
}
}
fn identity<T>(x: T) -> T {
x
}
fn rec<T>(mut it: T)
where
T: Iterator,
{
if () == () {
T::count(it);
} else {
rec(identity(&mut it))
//~^ ERROR reached the recursion limit while instantiating
}
}
// https://github.com/rust-lang/rust/issues/67552
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