1 files changed, 9 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Object-defineProperty-04.js b/js/src/jit-test/tests/debug/Object-defineProperty-04.js
new file mode 100644
index 0000000000..023a0cbf83
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Object-defineProperty-04.js
@@ -0,0 +1,9 @@
+// defineProperty can add array elements, bumping length
+
+var g = newGlobal({newCompartment: true});
+g.a = g.Array(0, 1, 2);
+var dbg = new Debugger;
+var gw = dbg.addDebuggee(g);
+var aw = gw.getOwnPropertyDescriptor("a").value;
+aw.defineProperty(3, {configurable: true, enumerable: true, writable: true, value: 3});
+assertEq(g.a.length, 4);