1 files changed, 20 insertions, 0 deletions
diff --git a/src/test/ui/coherence/coherence-tuple-conflict.rs b/src/test/ui/coherence/coherence-tuple-conflict.rs
new file mode 100644
index 000000000..8cc829726
--- /dev/null
+++ b/src/test/ui/coherence/coherence-tuple-conflict.rs
@@ -0,0 +1,20 @@
+use std::fmt::Debug;
+use std::default::Default;
+
+// Test that a blank impl for all T conflicts with an impl for some
+// specific T.
+
+trait MyTrait {
+    fn get(&self) -> usize;
+}
+
+impl<T> MyTrait for (T,T) {
+    fn get(&self) -> usize { 0 }
+}
+
+impl<A,B> MyTrait for (A,B) {
+//~^ ERROR E0119
+    fn get(&self) -> usize { self.dummy }
+}
+
+fn main() { }