1 files changed, 3 insertions, 1 deletions
diff --git a/tests/ui/impl-trait/deduce-signature-from-supertrait.rs b/tests/ui/impl-trait/deduce-signature-from-supertrait.rs
index d2c347920..7a51aac44 100644
--- a/tests/ui/impl-trait/deduce-signature-from-supertrait.rs
+++ b/tests/ui/impl-trait/deduce-signature-from-supertrait.rs
@@ -8,8 +8,10 @@ impl<T: Fn(i32)> SuperExpectation for T {}
 
 type Foo = impl SuperExpectation;
 
-fn main() {
+fn bop(_: Foo) {
     let _: Foo = |x| {
         let _ = x.to_string();
     };
 }
+
+fn main() {}