diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_3/Statements/regress-642975.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_3/Statements/regress-642975.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,30 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+var x = 0;
+var y = 1;
+var g = 1;
+
+var expect = "y";
+var actual;
+
+try {
+    eval("y: while (x) break\n/y/g.exec('y')");
+    actual = RegExp.lastMatch;
+} catch (e) {
+    actual = '' + e;
+}
+assertEq(actual, expect);
+
+try {
+    eval("y: while (x) continue\n/y/g.exec('y')");
+    actual = RegExp.lastMatch;
+} catch (e) {
+    actual = '' + e;
+}
+assertEq(actual, expect);
+
+reportCompare(0, 0, "ok");