1 files changed, 24 insertions, 0 deletions
diff --git a/tests/ui/functions-closures/fn-help-with-err.rs b/tests/ui/functions-closures/fn-help-with-err.rs
new file mode 100644
index 000000000..612fe1b84
--- /dev/null
+++ b/tests/ui/functions-closures/fn-help-with-err.rs
@@ -0,0 +1,24 @@
+// This test case checks the behavior of typeck::check::method::suggest::is_fn on Ty::Error.
+
+struct Foo;
+
+trait Bar {
+    //~^ NOTE `Bar` defines an item `bar`, perhaps you need to implement it
+    fn bar(&self) {}
+}
+
+impl Bar for Foo {}
+
+fn main() {
+    let arc = std::sync::Arc::new(oops);
+    //~^ ERROR cannot find value `oops` in this scope
+    //~| NOTE not found
+    arc.bar();
+
+    let arc2 = std::sync::Arc::new(|| Foo);
+    arc2.bar();
+    //~^ ERROR no method named `bar`
+    //~| NOTE method not found
+    //~| HELP items from traits can only be used if the trait is implemented and in scope
+    //~| HELP use parentheses to call this closure
+}