134284 2014-06-24 17:52:11 -0700 REGRESSION (r170325): UI process crashes in lastCommittedLayerTreeTransactionID() when the Web Content process crashes 2014-06-26 09:43:02 -0700 1 1 1 Unclassified WebKit WebKit2 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED P1 Normal --- 1 mitz benjamin benjamin bunhere cdumez commit-queue gyuyoung.kim sergio simon.fraser oldest_to_newest 1018201 0 mitz 2014-06-24 17:52:11 -0700 After the Web Content process crashes, setting its scroll view’s content offset causes a crash: * thread #1: tid = 0x1dd4a6, 0x000000011c5bf57c WebKit`WebKit::RemoteLayerTreeDrawingAreaProxy::lastCommittedLayerTreeTransactionID(this=0x0000000000000000) const + 12 at RemoteLayerTreeDrawingAreaProxy.h:53, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0xe8) * frame #0: 0x000000011c5bf57c WebKit`WebKit::RemoteLayerTreeDrawingAreaProxy::lastCommittedLayerTreeTransactionID(this=0x0000000000000000) const + 12 at RemoteLayerTreeDrawingAreaProxy.h:53 frame #1: 0x000000011c5bcde7 WebKit`-[WKContentView didUpdateVisibleRect:unobscuredRect:unobscuredRectInScrollViewCoordinates:scale:minimumScale:inStableState:isChangingObscuredInsetsInteractively:](self=0x00007ff6bac4a050, _cmd=0x000000011cb9f238, visibleRect=<unavailable>, unobscuredRect=<unavailable>, unobscuredRectInScrollViewCoordinates=<unavailable>, zoomScale=1, minimumScale=1, isStableState=true, isChangingObscuredInsetsInteractively=false) + 583 at WKContentView.mm:306 frame #2: 0x000000011c3799a5 WebKit`-[WKWebView _updateVisibleContentRects](self=0x00007ff6bc872a50, _cmd=0x000000011cb9f0ed) + 1893 at WKWebView.mm:1309 frame #3: 0x000000011c373526 WebKit`-[WKWebView _didInvokeUIScrollViewDelegateCallback](self=0x00007ff6bc872a50, _cmd=0x000000011cba0e10) + 86 at WKWebView.mm:638 frame #4: 0x000000011c8df3d5 WebKit`-[WKScrollViewDelegateForwarder forwardInvocation:](self=0x00007ff6bc883aa0, _cmd=0x000000011265d104, anInvocation=0x00007ff6bae83030) + 309 at WKScrollView.mm:89 1018231 1 233779 benjamin 2014-06-24 20:06:18 -0700 Created attachment 233779 Patch 1018527 2 233779 simon.fraser 2014-06-25 21:09:26 -0700 Comment on attachment 233779 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=233779&action=review > Source/WebKit2/UIProcess/WebPageProxy.h:385 > + void updateVisibleContentRects(const WebCore::FloatRect& exposedRect, const WebCore::FloatRect& unobscuredRect, const WebCore::FloatRect& unobscuredRectInScrollViewCoordinates, const WebCore::FloatRect& customFixedPositionRect, double scale, bool inStableState, bool isChangingObscuredInsetsInteractively, double timestamp, double horizontalVelocity, double verticalVelocity, double scaleChangeRate); So many arguments. 1018531 3 233779 benjamin 2014-06-25 21:15:54 -0700 Comment on attachment 233779 Patch Clearing flags on attachment: 233779 Committed r170460: <http://trac.webkit.org/changeset/170460> 1018532 4 benjamin 2014-06-25 21:15:59 -0700 All reviewed patches have been landed. Closing bug. 1018647 5 233779 darin 2014-06-26 09:43:02 -0700 Comment on attachment 233779 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=233779&action=review > Source/WebKit2/UIProcess/ios/WebPageProxyIOS.mm:202 > + return; Should remove this line. 233779 2014-06-24 20:06:18 -0700 2014-06-26 09:43:02 -0700 Patch bug-134284-20140624200543.patch text/plain 6855 benjamin U3VidmVyc2lvbiBSZXZpc2lvbjogMTcwNDA5CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViS2l0Mi9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViS2l0Mi9DaGFuZ2VMb2cKaW5kZXggNzc0ZjExYmIzY2U5ZDhh ZmI2OGZhMTZmODFjMjAwYTRjMzI1MzQyMi4uNzJjNDUxYWI4MGE4NDcyM2Y3NWI0ZmZhODk0MzI2 M2I1ZWI3ZDM0MiAxMDA2NDQKLS0tIGEvU291cmNlL1dlYktpdDIvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJLaXQyL0NoYW5nZUxvZwpAQCAtMSw1ICsxLDI1IEBACiAyMDE0LTA2LTI0ICBCZW5q YW1pbiBQb3VsYWluICA8YnBvdWxhaW5AYXBwbGUuY29tPgogCisgICAgICAgIFJFR1JFU1NJT04g KHIxNzAzMjUpOiBVSSBwcm9jZXNzIGNyYXNoZXMgaW4gbGFzdENvbW1pdHRlZExheWVyVHJlZVRy 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