1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/auto-regress/bug687399.js b/js/src/jit-test/tests/auto-regress/bug687399.js
new file mode 100644
index 0000000000..4a6734d1a9
--- /dev/null
+++ b/js/src/jit-test/tests/auto-regress/bug687399.js
@@ -0,0 +1,30 @@
+// Binary: cache/js-dbg-64-06445f55f009-linux
+// Flags: -m -n -a
+//
+
+if (!this.emulatedJSON) {
+    emulatedJSON = function () {
+        function stringify(value, whitelist) {
+            var a, i, v;
+            switch (typeof value) {
+            case 'string':
+                if (!(value.propertyIsEnumerable('length'))) {
+                    for (i = 0; i < l; i += 1) {
+                        k = whitelist[i];
+                        if (typeof k === 'string') {
+                            if (i %= 'not visited') {}
+                        }
+                    }
+                }
+            }
+        }
+        return {
+            stringify: stringify,
+        };
+    }();
+    var testPairs = [ ['{"five":5}'] ]
+    for (var i = 0; i < testPairs.length; i++) {
+        var pair = testPairs[i];
+        var s = emulatedJSON.stringify(pair[1])
+    }
+}