[QuickLook] PreviewLoader needs to check if its ResourceLoader has reached the terminal state before calling didReceiveResponse() and friends
rdar://problem/31360659
Created attachment 312518 [details] Patch
Created attachment 312560 [details] Patch
Comment on attachment 312560 [details] Patch Clearing flags on attachment: 312560 Committed r218050: <http://trac.webkit.org/changeset/218050>
All reviewed patches have been landed. Closing bug.