1 files changed, 10 insertions, 0 deletions
diff --git a/src/test/ui/lazy-type-alias-impl-trait/opaque_vs_opaque.rs b/src/test/ui/lazy-type-alias-impl-trait/opaque_vs_opaque.rs
new file mode 100644
index 000000000..8d03b5158
--- /dev/null
+++ b/src/test/ui/lazy-type-alias-impl-trait/opaque_vs_opaque.rs
@@ -0,0 +1,10 @@
+// check-pass
+
+fn main() {}
+
+fn filter_fold<T, Acc, PRED: FnMut(&T) -> bool, FOLD: FnMut(Acc, T) -> Acc>(
+    mut predicate: PRED,
+    mut fold: FOLD,
+) -> impl FnMut(Acc, T) -> Acc {
+    move |acc, item| if predicate(&item) { fold(acc, item) } else { acc }
+}