1 files changed, 21 insertions, 0 deletions
diff --git a/tests/ui/nll/closure-malformed-projection-input-issue-102800.rs b/tests/ui/nll/closure-malformed-projection-input-issue-102800.rs
new file mode 100644
index 000000000..260c16c17
--- /dev/null
+++ b/tests/ui/nll/closure-malformed-projection-input-issue-102800.rs
@@ -0,0 +1,21 @@
+// Regression test for #102800
+//
+// Here we are generating higher-ranked region constraints when normalizing and relating closure
+// input types. Previously this was an ICE in the error path because we didn't register enough
+// diagnostic information to render the higher-ranked subtyping error.
+
+// check-fail
+
+trait Trait {
+    type Ty;
+}
+
+impl Trait for &'static () {
+    type Ty = ();
+}
+
+fn main() {
+    let _: for<'a> fn(<&'a () as Trait>::Ty) = |_| {};
+    //~^ ERROR implementation of `Trait` is not general enough
+    //~| ERROR implementation of `Trait` is not general enough
+}