1 files changed, 21 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-43623.rs b/src/test/ui/issues/issue-43623.rs
new file mode 100644
index 000000000..cedcf7c36
--- /dev/null
+++ b/src/test/ui/issues/issue-43623.rs
@@ -0,0 +1,21 @@
+// check-pass
+
+pub trait Trait<'a> {
+    type Assoc;
+}
+
+pub struct Type;
+
+impl<'a> Trait<'a> for Type {
+    type Assoc = ();
+}
+
+pub fn break_me<T, F>(f: F)
+where
+    T: for<'b> Trait<'b>,
+    F: for<'b> FnMut(<T as Trait<'b>>::Assoc),
+{
+    break_me::<Type, fn(_)>;
+}
+
+fn main() {}