diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_5/regress/regress-373843.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_5/regress/regress-373843.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+if (typeof disassemble != 'undefined')
+{
+    var func = disassemble(function() { return "c\\d"; })
+
+    // The disassembled function will contain a bytecode "string" with the content of the string next to it.
+    // Check if that string isn't over-escaped i.e. \\ isn't escaped to \\\\ .
+    assertEq(func.indexOf("\\\\\\\\"), -1)
+}
+
+reportCompare(0, 0, 'ok');