Crash under -[WKWebView _updateVisibleContentRects]
Created attachment 312362 [details] Patch
rdar://problem/32650112
Comment on attachment 312362 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=312362&action=review > Source/WebKit2/UIProcess/API/Cocoa/WKWebView.mm:319 > +- (BOOL)_isValid Maybe adopt this in _webProcessIdentifier and _killWebProcess? This is definitely better than those, which don't do the nil check.
https://trac.webkit.org/r217956