Created attachment 77747 [details] gdb backtrace I got an assertion failure while running cross_fuzz http://lcamtuf.coredump.cx/cross_fuzz/ Mac OS X 10.6.5, Safari 5.0.3, WebKit x86_64 Debug build from svn r74844. Attached is gdb backtrace.
ASSERTION FAILED: !documentElement() && !m_styleSheets->length()
It appears that the relevant part of the assertion that failed is !m_styleSheets->length()
Definitely hit, see the other bug for more context. *** This bug has been marked as a duplicate of bug 68859 ***