diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testDontClobberScannerError.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testDontClobberScannerError.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,9 @@
+var caught = false;
+try {
+    Function("a, `", "");
+} catch(e) {
+    assertEq(e.toString().search("SyntaxError: malformed formal parameter") == -1, true);
+    assertEq(e.toString().search("SyntaxError: illegal character")          == -1, false);
+    caught = true;
+}
+assertEq(caught, true);