1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/js1_7/extensions/regress-387955-02.js b/js/src/tests/js1_7/extensions/regress-387955-02.js
new file mode 100644
index 000000000..dc3b795b6
--- /dev/null
+++ b/js/src/tests/js1_7/extensions/regress-387955-02.js
@@ -0,0 +1,41 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 387955;
+var summary = 'Do not Crash [@ TraceEdge]';
+var actual = 'No Crash';
+var expect = 'No Crash';
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  var f;
+
+  function gen(yield_at_least_once) {
+    let x = 11;
+    function y(){}
+    f = function(){ return x; };
+    if (yield_at_least_once)
+      yield;
+  }
+
+  for (var i in gen()) { }
+
+  if (f() !== 11)
+    throw "unexpected value of local x";
+
+  reportCompare(expect, actual, summary);
+
+  exitFunc ('test');
+}