[Webkit-unassigned] [Bug 126432] REGRESSION (r161195): Acid2 regression tests frequently fail

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=126432





--- Comment #16 from Antti Koivisto <koivisto at iki.fi>  2014-01-07 12:34:36 PST ---
Here is the problem. We get WebFrameLoaderClient::dispatchDidFinishLoad (because at that point we have nothing to load) and that triggers plugin fallback load via DRT. The same call also dumps the render tree before the new load completes.

(lldb) bt
* thread #1: tid = 0x45b45b, 0x00000001099a5160 WebCore`WebCore::HTMLPlugInImageElement::startLoadingImage(this=0x00007f95b14a3610) + 16 at HTMLPlugInImageElement.cpp:334, queue = 'com.apple.main-thread, stop reason = breakpoint 25.1
    frame #0: 0x00000001099a5160 WebCore`WebCore::HTMLPlugInImageElement::startLoadingImage(this=0x00007f95b14a3610) + 16 at HTMLPlugInImageElement.cpp:334
    frame #1: 0x00000001099a4e30 WebCore`WebCore::HTMLPlugInImageElement::startLoadingImageCallback(node=0x00007f95b14a3610, =0) + 32 at HTMLPlugInImageElement.cpp:341
    frame #2: 0x00000001091e754d WebCore`WebCore::ContainerNode::dispatchPostAttachCallbacks() + 189 at ContainerNode.cpp:813
    frame #3: 0x00000001091e7400 WebCore`WebCore::ContainerNode::resumePostAttachCallbacks(document=0x00007f95b1862000) + 64 at ContainerNode.cpp:780
    frame #4: 0x000000010916eb08 WebCore`WebCore::PostAttachCallbackDisabler::~PostAttachCallbackDisabler(this=0x00007fff58c0cdf0) + 24 at Element.h:825
    frame #5: 0x000000010916eae5 WebCore`WebCore::PostAttachCallbackDisabler::~PostAttachCallbackDisabler(this=0x00007fff58c0cdf0) + 21 at Element.h:824
    frame #6: 0x000000010948cd0e WebCore`WebCore::Document::recalcStyle(this=0x00007f95b1862000, change=NoChange) + 574 at Document.cpp:1774
    frame #7: 0x000000010948946f WebCore`WebCore::Document::updateStyleIfNeeded(this=0x00007f95b1862000) + 431 at Document.cpp:1809
    frame #8: 0x000000010978e3af WebCore`WebCore::FrameView::updateLayoutAndStyleIfNeededRecursive(this=0x00007f95b1520960) + 47 at FrameView.cpp:3722
    frame #9: 0x000000010897bb00 WebKit`-[WebHTMLView(self=0x00007f95b1522370, _cmd=0x00007fff919a94f6) _web_updateLayoutAndStyleIfNeededRecursive] + 112 at WebHTMLView.mm:5970
    frame #10: 0x0000000108964842 WebKit`-[WebHTMLView(self=0x00007f95b1522370, _cmd=0x00007fff8efce8a3) viewWillDraw] + 98 at WebHTMLView.mm:1420
    frame #11: 0x00007fff8e6e72a1 AppKit`-[NSView viewWillDraw] + 1126
    frame #12: 0x00007fff8e6e72a1 AppKit`-[NSView viewWillDraw] + 1126
    frame #13: 0x00007fff8e6e7774 AppKit`-[NSScrollView viewWillDraw] + 51
    frame #14: 0x00007fff8e6e72a1 AppKit`-[NSView viewWillDraw] + 1126
    frame #15: 0x00007fff8e6e72a1 AppKit`-[NSView viewWillDraw] + 1126
    frame #16: 0x00007fff8e6e72a1 AppKit`-[NSView viewWillDraw] + 1126
    frame #17: 0x00007fff8e6e72a1 AppKit`-[NSView viewWillDraw] + 1126
    frame #18: 0x00007fff8e6e5f14 AppKit`-[NSView _sendViewWillDrawInRect:clipRootView:] + 1423
    frame #19: 0x00007fff8e6c83a7 AppKit`-[NSView displayIfNeeded] + 1021
    frame #20: 0x000000010701c35b DumpRenderTree`-[FrameLoadDelegate webView:didFinishLoadForFrame:](self=0x00007f95b1416b20, _cmd=0x00007fff8effa614, sender=0x00007f95b143cd90, frame=0x00007f95b15007d0) + 443 at FrameLoadDelegate.mm:269
    frame #21: 0x0000000108902d8e WebKit`objc_object* wtfCallIMP<objc_object*, WebView*, objc_object*>(implementation=0x000000010701c1a0, target=0x00007f95b1416b20, selector=0x00007fff8effa614, arguments=0x00007f95b143cd90, arguments=0x00007f95b15007d0)(objc_object*, objc_selector*, ...), objc_object*, objc_selector, WebView*, objc_object*) + 62 at ObjcRuntimeExtras.h:44
    frame #22: 0x0000000108900e60 WebKit`CallDelegate(implementation=0x000000010701c1a0, self=0x00007f95b143cd90, delegate=0x00007f95b1416b20, selector=0x00007fff8effa614, object=0x00007f95b15007d0)(objc_object*, objc_selector*, ...), WebView*, objc_object*, objc_selector, objc_object*) + 80 at WebDelegateImplementationCaching.mm:595
    frame #23: 0x0000000108900dfd WebKit`CallFrameLoadDelegate(implementation=0x000000010701c1a0, self=0x00007f95b143cd90, selector=0x00007fff8effa614, object=0x00007f95b15007d0)(objc_object*, objc_selector*, ...), WebView*, objc_selector, objc_object*) + 77 at WebDelegateImplementationCaching.mm:1148
    frame #24: 0x000000010892976c WebKit`WebFrameLoaderClient::dispatchDidFinishLoad(this=0x00007f95b143c100) + 300 at WebFrameLoaderClient.mm:859
    frame #25: 0x000000010975648f WebCore`WebCore::FrameLoader::checkLoadCompleteForThisFrame(this=0x00007f95b143c828) + 1711 at FrameLoader.cpp:2302
    frame #26: 0x000000010974f004 WebCore`WebCore::FrameLoader::checkLoadComplete(this=0x00007f95b143c828) + 324 at FrameLoader.cpp:2474

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