1 files changed, 11 insertions, 0 deletions
diff --git a/tests/ui/extern/extern-wrong-value-type.rs b/tests/ui/extern/extern-wrong-value-type.rs
new file mode 100644
index 000000000..337865ec1
--- /dev/null
+++ b/tests/ui/extern/extern-wrong-value-type.rs
@@ -0,0 +1,11 @@
+extern "C" fn f() {
+}
+
+fn is_fn<F>(_: F) where F: Fn() {}
+
+fn main() {
+    // extern functions are extern "C" fn
+    let _x: extern "C" fn() = f; // OK
+    is_fn(f);
+    //~^ ERROR expected a `Fn<()>` closure, found `extern "C" fn() {f}`
+}