diff -r 000000000000 -r 6474c204b198 toolkit/components/places/tests/autocomplete/test_422277.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/components/places/tests/autocomplete/test_422277.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,25 @@
+/* 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/. */
+
+/**
+ * Test bug 422277 to make sure bad escaped uris don't get escaped. This makes
+ * sure we don't hit an assertion for "not a UTF8 string".
+ */
+
+// Define some shared uris and titles (each page needs its own uri)
+let kURIs = [
+  "http://site/%EAid",
+];
+let kTitles = [
+  "title",
+];
+
+addPageBook(0, 0);
+
+// Provide for each test: description; search terms; array of gPages indices of
+// pages that should match; optional function to be run before the test
+let gTests = [
+  ["0: Bad escaped uri stays escaped",
+   "site", [0]],
+];