1 files changed, 8 insertions, 0 deletions
diff --git a/src/test/compile-fail/writing-to-immutable-obj.rs b/src/test/compile-fail/writing-to-immutable-obj.rs
new file mode 100644
index 00000000..ffa2cebe
--- /dev/null
+++ b/src/test/compile-fail/writing-to-immutable-obj.rs
@@ -0,0 +1,8 @@
+// error-pattern: writing to immutable type
+obj objy(int x) {
+    fn foo() -> () {
+        x = 5;
+    }
+}
+fn main() {
+}