The test fast/text/find-backwards.htm hangs infinitely when building WebCore/editing/TextIterator.cpp _without_ the ICU based SearchBuffer. Toggling the #ifdefs in just TextIterator.cpp is enough to reproduce it.
See also 23109
Err, I mean bug #23109 :)
Created attachment 26979 [details] patch
Comment on attachment 26979 [details] patch r=me
http://trac.webkit.org/changeset/40206
*** Bug 23571 has been marked as a duplicate of this bug. ***