1 files changed, 31 insertions, 0 deletions
diff --git a/src/test/ui/traits/multidispatch-convert-ambig-dest.rs b/src/test/ui/traits/multidispatch-convert-ambig-dest.rs
new file mode 100644
index 000000000..aa74e11c3
--- /dev/null
+++ b/src/test/ui/traits/multidispatch-convert-ambig-dest.rs
@@ -0,0 +1,31 @@
+// Check that we get an error in a multidisptach scenario where the
+// set of impls is ambiguous.
+
+trait Convert<Target> {
+    fn convert(&self) -> Target;
+}
+
+impl Convert<i8> for i32 {
+    fn convert(&self) -> i8 {
+        *self as i8
+    }
+}
+
+impl Convert<i16> for i32 {
+    fn convert(&self) -> i16 {
+        *self as i16
+    }
+}
+
+fn test<T,U>(_: T, _: U)
+where T : Convert<U>
+{
+}
+
+fn a() {
+    test(22, std::default::Default::default());
+    //~^ ERROR type annotations needed
+    //~| ERROR type annotations needed
+}
+
+fn main() {}