1 files changed, 7 insertions, 0 deletions
diff --git a/tests/ui/diagnostic-width/impl-trait-invalid-iterator-error.rs b/tests/ui/diagnostic-width/impl-trait-invalid-iterator-error.rs
new file mode 100644
index 00000000000..05588932395
--- /dev/null
+++ b/tests/ui/diagnostic-width/impl-trait-invalid-iterator-error.rs
@@ -0,0 +1,7 @@
+//! Test for #39872 and #39553
+
+fn will_ice(something: &u32) -> impl Iterator<Item = &u32> {
+    //~^ ERROR `()` is not an iterator
+}
+
+fn main() {}