1 files changed, 14 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/bug1317943.js b/js/src/jit-test/tests/ion/bug1317943.js
new file mode 100644
index 0000000000..10b36d3681
--- /dev/null
+++ b/js/src/jit-test/tests/ion/bug1317943.js
@@ -0,0 +1,14 @@
+"use strict";
+function test() {
+    for (var i=0; i<10; i++) {
+        try {
+            var arr = [];
+            arr[0] = 1;
+            Object.freeze(arr);
+            arr[0] = 2;
+        } catch (e) {
+            assertEq(e.toString().includes("TypeError: 0 is read-only"), true);
+        }
+    }
+}
+test();