diff options
Diffstat (limited to 'tests/ui/traits/non_lifetime_binders/disqualifying-object-candidates.rs')
-rw-r--r-- | tests/ui/traits/non_lifetime_binders/disqualifying-object-candidates.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tests/ui/traits/non_lifetime_binders/disqualifying-object-candidates.rs b/tests/ui/traits/non_lifetime_binders/disqualifying-object-candidates.rs new file mode 100644 index 000000000..b999f251d --- /dev/null +++ b/tests/ui/traits/non_lifetime_binders/disqualifying-object-candidates.rs @@ -0,0 +1,19 @@ +// check-pass + +trait Foo { + type Bar<T> + where + dyn Send + 'static: Send; +} + +impl Foo for () { + type Bar<T> = i32; + // We take `<() as Foo>::Bar<T>: Sized` and normalize it under the where clause + // of `for<S> <() as Foo>::Bar<S> = i32`. This gives us back `i32: Send` with + // the nested obligation `(dyn Send + 'static): Send`. However, during candidate + // assembly for object types, we disqualify any obligations that has non-region + // late-bound vars in the param env(!), rather than just the predicate. This causes + // the where clause to not hold even though it trivially should. +} + +fn main() {} |