1 files changed, 16 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/auto-regress/bug679799.js b/js/src/jit-test/tests/auto-regress/bug679799.js
new file mode 100644
index 000000000..fa899458f
--- /dev/null
+++ b/js/src/jit-test/tests/auto-regress/bug679799.js
@@ -0,0 +1,16 @@
+// Binary: cache/js-dbg-64-2d95fc517e57-linux
+// Flags: -m -n -a
+//
+
+function test()
+{
+  var x = { "0": 3, "-0": 7 };
+  try {
+    delete x["-0"];
+    if ("-0" in x)
+      throw "0 not in x after insertion of 0 property";
+    this ["-0"] = 7;
+  } catch(ex) {}
+}
+test();
+test();