126152 2013-12-23 01:00:21 -0800 [CSSRegions] Crash while repainting an invalid region 2013-12-24 01:22:13 -0800 1 1 1 Unclassified WebKit CSS 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED P2 Normal --- 57312 1 mihnea mihnea commit-queue dbates esprehn+autocc glenn hyatt kondapallykalyan simon.fraser WebkitBugTracker oldest_to_newest 962420 0 mihnea 2013-12-23 01:00:21 -0800 A invalid region, part of a dependency cycle, should not attempt to repaint the content from the associated named flow. 962422 1 219900 mihnea 2013-12-23 01:05:46 -0800 Created attachment 219900 Patch 962558 2 219900 dbates 2013-12-23 13:06:51 -0800 Comment on attachment 219900 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=219900&action=review This looks sane to me. Feel free to have a domain expert look over this patch. > LayoutTests/fast/regions/repaint/invalid-region-repaint-crash.html:4 > + <script src="../../repaint/resources/text-based-repaint.js" type="text/javascript"></script> Please remove the HTML attribute type as it's unnecessary given that this document is an HTML5 document. > Source/WebCore/rendering/RenderLayer.cpp:6278 > + RenderNamedFlowFragment* region = toRenderBlockFlow(&renderer())->renderNamedFlowFragment(); Notice that we generate a toRenderBlockFlow()-variant that takes and returns a reference. For you consideration, I suggest we use this variant to remove the address-of operator and to document the "non-nullness" of the return value of toRenderBlockFlow() since renderer() is guaranteed to be non-null. RenderNamedFlowFragment* region = toRenderBlockFlow(renderer()).renderNamedFlowFragment(); 962732 3 219958 mihnea 2013-12-24 00:32:53 -0800 Created attachment 219958 Patch for landing 962739 4 219958 commit-queue 2013-12-24 01:22:11 -0800 Comment on attachment 219958 Patch for landing Clearing flags on attachment: 219958 Committed r161054: <http://trac.webkit.org/changeset/161054> 962740 5 commit-queue 2013-12-24 01:22:13 -0800 All reviewed patches have been landed. Closing bug. 219900 2013-12-23 01:05:46 -0800 2013-12-24 00:32:39 -0800 Patch 126152.patch text/plain 5759 mihnea ZGlmZiAtLWdpdCBhL0xheW91dFRlc3RzL0NoYW5nZUxvZyBiL0xheW91dFRlc3RzL0NoYW5nZUxv ZwppbmRleCA3OWNlMWQ4Li45NTdmNTNjIDEwMDY0NAotLS0gYS9MYXlvdXRUZXN0cy9DaGFuZ2VM b2cKKysrIGIvTGF5b3V0VGVzdHMvQ2hhbmdlTG9nCkBAIC0xLDMgKzEsMTMgQEAKKzIwMTMtMTIt MjMgIE1paG5lYSBPdmlkZW5pZSAgPG1paG5lYUBhZG9iZS5jb20+CisKKyAgICAgICAgW0NTU1Jl Z2lvbnNdIENyYXNoIHdoaWxlIHJlcGFpbnRpbmcgYW4gaW52YWxpZCByZWdpb24KKyAgICAgICAg aHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTEyNjE1MgorCisgICAgICAg IFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgICogZmFzdC9yZWdpb25zL3Jl cGFpbnQvaW52YWxpZC1yZWdpb24tcmVwYWludC1jcmFzaC1leHBlY3RlZC50eHQ6IEFkZGVkLgor ICAgICAgICAqIGZhc3QvcmVnaW9ucy9yZXBhaW50L2ludmFsaWQtcmVnaW9uLXJlcGFpbnQtY3Jh c2guaHRtbDogQWRkZWQuCisKIDIwMTMtMTItMjIgIE1paG5lYSBPdmlkZW5pZSAgPG1paG5lYUBh ZG9iZS5jb20+CiAKICAgICAgICAgW0NTU1JlZ2lvbnNdIENyYXNoIHdoZW4gdHJ5aW5nIHRvIHNl 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