1 files changed, 38 insertions, 0 deletions
diff --git a/src/test/ui/generic-associated-types/issue-86787.rs b/src/test/ui/generic-associated-types/issue-86787.rs
new file mode 100644
index 000000000..0f8096c8a
--- /dev/null
+++ b/src/test/ui/generic-associated-types/issue-86787.rs
@@ -0,0 +1,38 @@
+#![feature(generic_associated_types)]
+// check-fail
+
+enum Either<L, R> {
+    Left(L),
+    Right(R),
+}
+
+pub trait HasChildrenOf {
+    type T;
+    type TRef<'a>;
+    //~^ missing required
+
+    fn ref_children<'a>(&'a self) -> Vec<Self::TRef<'a>>;
+    fn take_children(self) -> Vec<Self::T>;
+}
+
+impl<Left, Right> HasChildrenOf for Either<Left, Right>
+where
+    Left: HasChildrenOf,
+    Right: HasChildrenOf,
+{
+    type T = Either<Left::T, Right::T>;
+    type TRef<'a> = Either<&'a Left::T, &'a Right::T>
+    where
+        <Left as HasChildrenOf>::T: 'a,
+        <Right as HasChildrenOf>::T: 'a;
+
+    fn ref_children<'a>(&'a self) -> Vec<Self::TRef<'a>> {
+        todo!()
+    }
+
+    fn take_children(self) -> Vec<Self::T> {
+        todo!()
+    }
+}
+
+fn main() {}