diff --git a/js/tests/js1_5/extensions/regress-396326.js b/js/tests/js1_5/extensions/regress-396326.js
new file mode 100755
index 000000000000..2f00de0bdec7
--- /dev/null
+++ b/js/tests/js1_5/extensions/regress-396326.js
@@ -0,0 +1,81 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is JavaScript Engine testing utilities.
+ *
+ * The Initial Developer of the Original Code is
+ * Mozilla Foundation.
+ * Portions created by the Initial Developer are Copyright (C) 2007
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s): Seno Aiko
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+var gTestfile = 'regress-396326.js';
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 396326;
+var summary = 'Do not assert trying to disassemble get(var|arg) prop';
+var actual = 'No Crash';
+var expect = 'No Crash';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+ 
+  if (typeof dis == 'undefined')
+  {
+    print('disassembly not supported. test skipped.');
+    reportCompare(expect, actual, summary);
+  }
+  else
+  {
+    function f1() { var v; return v.prop }; 
+    dis(f1);
+    reportCompare(expect, actual, summary + 
+                  ': function f1() { var v; return v.prop };');
+
+    function f2(arg) { return arg.prop }; 
+    dis(f2);
+    reportCompare(expect, actual, summary + 
+                  ': function f2(arg) { return arg.prop };');
+
+    function f3() { return this.prop }; 
+    dis(f3);
+    reportCompare(expect, actual, summary + 
+                  ': function f3() { return this.prop };');
+  }
+
+  exitFunc ('test');
+}
diff --git a/js/tests/js1_7/extensions/regress-396326.js b/js/tests/js1_7/extensions/regress-396326.js
new file mode 100755
index 000000000000..dcf8599e8d0c
--- /dev/null
+++ b/js/tests/js1_7/extensions/regress-396326.js
@@ -0,0 +1,70 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is JavaScript Engine testing utilities.
+ *
+ * The Initial Developer of the Original Code is
+ * Mozilla Foundation.
+ * Portions created by the Initial Developer are Copyright (C) 2007
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s): Seno Aiko
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+var gTestfile = 'regress-396326.js';
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 396326;
+var summary = 'Do not assert trying to disassemble get(var|arg) prop';
+var actual = 'No Crash';
+var expect = 'No Crash';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+ 
+  if (typeof dis == 'undefined')
+  {
+    print('disassembly not supported. test skipped.');
+    reportCompare(expect, actual, summary);
+  }
+  else
+  {
+    function f4() { let local; return local.prop }; 
+    dis(f4);
+    reportCompare(expect, actual, summary + 
+                  ': function f4() { let local; return local.prop };');
+  }
+
+  exitFunc ('test');
+}