1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/tests/non262/regress/regress-452498-050.js b/js/src/tests/non262/regress/regress-452498-050.js
new file mode 100644
index 0000000000..6989837f97
--- /dev/null
+++ b/js/src/tests/non262/regress/regress-452498-050.js
@@ -0,0 +1,40 @@
+/* -*- 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 = 452498;
+var summary = 'TM: upvar2 regression tests';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+// ------- Comment #50 From Jason Orendorff
+
+// Do not crash
+
+// compiler bug when a block introduces no names
+  { let {}={}; }
+
+  try
+  {
+// compiler incorrectly emits GETLOCAL for first `x`,
+// triggering decompiler assertion
+    while (x.y) { let x; }
+  }
+  catch(ex)
+  {
+  }
+
+  reportCompare(expect, actual, summary);
+}