1 files changed, 9 insertions, 0 deletions
diff --git a/tests/ui/binop/binary-op-on-fn-ptr-eq.rs b/tests/ui/binop/binary-op-on-fn-ptr-eq.rs
new file mode 100644
index 000000000..8e20640b5
--- /dev/null
+++ b/tests/ui/binop/binary-op-on-fn-ptr-eq.rs
@@ -0,0 +1,9 @@
+// run-pass
+// Tests equality between supertype and subtype of a function
+// See the issue #91636
+fn foo(_a: &str) {}
+
+fn main() {
+    let x = foo as fn(&'static str);
+    let _ = x == foo;
+}