1 files changed, 27 insertions, 0 deletions
diff --git a/tests/ui/augmented-assignments.rs b/tests/ui/augmented-assignments.rs
new file mode 100644
index 000000000..20c7fb3a9
--- /dev/null
+++ b/tests/ui/augmented-assignments.rs
@@ -0,0 +1,27 @@
+use std::ops::AddAssign;
+
+struct Int(i32);
+
+impl AddAssign for Int {
+    fn add_assign(&mut self, _: Int) {
+        unimplemented!()
+    }
+}
+
+fn main() {
+    let mut x = Int(1);
+    x
+    //~^ NOTE borrow of `x` occurs here
+    +=
+    x;
+    //~^ ERROR cannot move out of `x` because it is borrowed
+    //~| move out of `x` occurs here
+
+    let y = Int(2);
+    //~^ HELP consider changing this to be mutable
+    //~| SUGGESTION mut
+    y   //~ ERROR cannot borrow `y` as mutable, as it is not declared as mutable
+        //~| cannot borrow as mutable
+    +=
+    Int(1);
+}