diff options
Diffstat (limited to 'src/test/ui/generic-associated-types/issue-91139.rs')
-rw-r--r-- | src/test/ui/generic-associated-types/issue-91139.rs | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/test/ui/generic-associated-types/issue-91139.rs b/src/test/ui/generic-associated-types/issue-91139.rs new file mode 100644 index 000000000..40eef11f0 --- /dev/null +++ b/src/test/ui/generic-associated-types/issue-91139.rs @@ -0,0 +1,36 @@ +#![feature(generic_associated_types)] + +trait Foo<T> { + type Type<'a> + where + T: 'a; +} + +impl<T> Foo<T> for () { + type Type<'a> = () + where + T: 'a; +} + +fn foo<T>() { + let _: for<'a> fn(<() as Foo<T>>::Type<'a>, &'a T) = |_, _| (); + //~^ ERROR `T` does not live long enough + //~| ERROR `T` does not live long enough + //~| ERROR `T` does not live long enough + //~| ERROR `T` does not live long enough + //~| ERROR `T` does not live long enough + //~| ERROR `T` does not live long enough + //~| ERROR `T` does not live long enough + //~| ERROR `T` does not live long enough + //~| ERROR `T` may not live long enough + // + // FIXME: This error is bogus, but it arises because we try to validate + // that `<() as Foo<T>>::Type<'a>` is valid, which requires proving + // that `T: 'a`. Since `'a` is higher-ranked, this becomes + // `for<'a> T: 'a`, which is not true. Of course, the error is bogus + // because there *ought* to be an implied bound stating that `'a` is + // not any lifetime but specifically + // "some `'a` such that `<() as Foo<T>>::Type<'a>" is valid". +} + +pub fn main() {} |