1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/traits/multidispatch-bad.rs b/src/test/ui/traits/multidispatch-bad.rs
new file mode 100644
index 000000000..b625b9615
--- /dev/null
+++ b/src/test/ui/traits/multidispatch-bad.rs
@@ -0,0 +1,22 @@
+// Test that we detect an illegal combination of types.
+
+trait Convert<Target> {
+    fn convert(&self) -> Target;
+}
+
+impl Convert<u32> for i32 {
+    fn convert(&self) -> u32 {
+        *self as u32
+    }
+}
+
+fn test<T,U>(_: T, _: U)
+where T : Convert<U>
+{
+}
+
+fn a() {
+    test(22i32, 44i32); //~ ERROR mismatched types
+}
+
+fn main() {}