1 // The double space in `impl Iterator` is load bearing! We want to make sure we don't regress by
2 // accident if the internal string representation changes.
4 fn foo(constraints: impl Iterator) {
5 for constraint in constraints {
7 //~^ ERROR `<impl Iterator as Iterator>::Item` doesn't implement `Debug`
11 fn bar<T>(t: T, constraints: impl Iterator) where T: std::fmt::Debug {
12 for constraint in constraints {
15 //~^ ERROR `<impl Iterator as Iterator>::Item` doesn't implement `Debug`
19 fn baz(t: impl std::fmt::Debug, constraints: impl Iterator) {
20 for constraint in constraints {
23 //~^ ERROR `<impl Iterator as Iterator>::Item` doesn't implement `Debug`
27 fn bat<I, T: std::fmt::Debug>(t: T, constraints: impl Iterator, _: I) {
28 for constraint in constraints {
31 //~^ ERROR `<impl Iterator as Iterator>::Item` doesn't implement `Debug`
35 fn bak(constraints: impl Iterator + std::fmt::Debug) {
36 for constraint in constraints {
38 //~^ ERROR `<impl Iterator + std::fmt::Debug as Iterator>::Item` doesn't implement
43 fn baw<>(constraints: impl Iterator) {
44 for constraint in constraints {
46 //~^ ERROR `<impl Iterator as Iterator>::Item` doesn't implement `Debug`
50 fn qux(_: impl std::fmt::Debug) {}