1 files changed, 10 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Object-defineProperty-10.js b/js/src/jit-test/tests/debug/Object-defineProperty-10.js
new file mode 100644
index 0000000000..3e4f9930c5
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Object-defineProperty-10.js
@@ -0,0 +1,10 @@
+// defineProperty can make a non-configurable writable property non-writable
+
+load(libdir + "asserts.js");
+var g = newGlobal({newCompartment: true});
+var dbg = new Debugger;
+var gw = dbg.addDebuggee(g);
+gw.defineProperty("p", {writable: true, value: 1});
+gw.defineProperty("p", {writable: false});
+g.p = 4;
+assertEq(g.p, 1);