1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/non-extensible-elements4.js b/js/src/jit-test/tests/basic/non-extensible-elements4.js
new file mode 100644
index 0000000000..6b14b97c6f
--- /dev/null
+++ b/js/src/jit-test/tests/basic/non-extensible-elements4.js
@@ -0,0 +1,27 @@
+// When an already-non-extensible object is frozen, its Shape doesn't change.
+// Make sure SetElement ICs handle this correctly.
+
+function doStore(a) {
+    for (var i = 0; i < 100; i++) {
+        a[1] = i;
+    }
+}
+function test() {
+    with(this) {} // Don't Ion-compile.
+
+    var a = {0: 0, 1: 1};
+    Object.preventExtensions(a);
+    doStore(a);
+    assertEq(a[1], 99);
+
+    a[1] = 0;
+    Object.freeze(a);
+    doStore(a);
+    assertEq(a[1], 0);
+}
+
+setJitCompilerOption("ion.forceinlineCaches", 1);
+test();
+
+setJitCompilerOption("ion.forceinlineCaches", 0);
+test();