Several XHR tests, such as http/tests/xmlhttprequest/access-control-basic-denied-preflight-cache.html, are failing an assertion in createCFURLResponseWithDefaultMIMEType. The assertion is: // We should never be applying the default MIMEType if we told the networking layer to do content sniffing for this URL. ASSERT(!ResourceHandle::shouldContentSniffURL(CFURLResponseGetURL(response)));
I don't know the effect in a Release build, but Brady probably does.
Added the tests to the Skipped file in r43702
<rdar://problem/6887762>
Created attachment 30346 [details] Make a good assert and reenable the layout tests
http://trac.webkit.org/changeset/43716