1 files changed, 15 insertions, 0 deletions
diff --git a/tests/ui/resolve/issue-21221-4.rs b/tests/ui/resolve/issue-21221-4.rs
new file mode 100644
index 00000000000..88d5bd06ca5
--- /dev/null
+++ b/tests/ui/resolve/issue-21221-4.rs
@@ -0,0 +1,15 @@
+// testing whether the lookup mechanism picks up types
+// defined in the outside crate
+
+// aux-build:issue-21221-4.rs
+
+extern crate issue_21221_4;
+
+struct Foo;
+
+impl T for Foo {}
+//~^ ERROR cannot find trait `T`
+
+fn main() {
+    println!("Hello, world!");
+}