1 files changed, 10 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-6738.rs b/tests/ui/issues/issue-6738.rs
new file mode 100644
index 000000000..a2f8dfe9c
--- /dev/null
+++ b/tests/ui/issues/issue-6738.rs
@@ -0,0 +1,10 @@
+struct Foo<T> {
+    x: T,
+}
+impl<T> Foo<T> {
+    fn add(&mut self, v: Foo<T>){
+        self.x += v.x;
+        //~^ ERROR: binary assignment operation `+=` cannot be applied
+    }
+}
+fn main() {}