http://buildbot.jail.google.com/buildbot/chromium/builders/Chromium%20Reliability/builds/11520/steps/reliability:%20partial%20result%20of%20current%20build/logs/stdio

Major suspect is the new tree builder, assigning to Adam.
http://trac.webkit.org/changeset/64712

Log:
chrome_2580000!WebCore::RenderBlock::addChildIgnoringAnonymousColumnBlocks+0x143 [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\rendering\renderblock.cpp @ 682]
chrome_2580000!WebCore::RenderBlock::addChildIgnoringContinuation+0xa6 [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\rendering\renderblock.cpp @ 761]
chrome_2580000!WebCore::RenderBlock::addChild+0x5b [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\rendering\renderblock.cpp @ 754]
chrome_2580000!WebCore::Node::createRendererIfNeeded+0x108 [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\dom\node.cpp @ 1418]
chrome_2580000!WebCore::Element::attach+0x14 [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\dom\element.cpp @ 816]
chrome_2580000!WebCore::ContainerNode::attach+0x1c [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\dom\containernode.cpp @ 638]
chrome_2580000!WebCore::Element::attach+0x1b [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\dom\element.cpp @ 817]
chrome_2580000!WebCore::ContainerNode::attach+0x1c [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\dom\containernode.cpp @ 638]
chrome_2580000!WebCore::Element::attach+0x1b [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\dom\element.cpp @ 817]
chrome_2580000!WebCore::HTMLTreeBuilder::callTheAdoptionAgency+0x280 [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\html\htmltreebuilder.cpp @ 1752]
chrome_2580000!WebCore::HTMLTreeBuilder::processEndTagForInBody+0x3ca [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\html\htmltreebuilder.cpp @ 2077]
chrome_2580000!WebCore::HTMLTreeBuilder::processEndTag+0x1d0 [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\html\htmltreebuilder.cpp @ 2402]
chrome_2580000!WebCore::HTMLTreeBuilder::processFakeEndTag+0x3d [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\html\htmltreebuilder.cpp @ 573]
chrome_2580000!WebCore::HTMLTreeBuilder::processStartTagForInBody+0x410 [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\html\htmltreebuilder.cpp @ 900]
chrome_2580000!WebCore::HTMLTreeBuilder::processStartTag+0x7b6 [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\html\htmltreebuilder.cpp @ 1578]
chrome_2580000!WebCore::HTMLTreeBuilder::constructTreeFromToken+0x37 [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\html\htmltreebuilder.cpp @ 516]
chrome_2580000!WebCore::HTMLDocumentParser::pumpTokenizer+0x9d [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\html\htmldocumentparser.cpp @ 173]
chrome_2580000!WebCore::HTMLDocumentParser::resumeParsingAfterScriptExecution+0x59 [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\html\htmldocumentparser.cpp @ 352]
chrome_2580000!WebCore::HTMLDocumentParser::notifyFinished+0x37 [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\html\htmldocumentparser.cpp @ 387]
chrome_2580000!WebCore::CachedScript::checkNotify+0x3a [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\loader\cachedscript.cpp @ 99]
chrome_2580000!WebCore::CachedScript::data+0x6d [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\loader\cachedscript.cpp @ 90]
chrome_2580000!WebCore::Loader::Host::didFinishLoading+0xad [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\loader\loader.cpp @ 416]
chrome_2580000!WebCore::SubresourceLoader::didFinishLoading+0x26 [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\loader\subresourceloader.cpp @ 185]
chrome_2580000!WebCore::ResourceLoader::didFinishLoading+0x7 [c:\b\slave\chromium-rel-xp\build\src\third_party\webkit\webcore\loader\resourceloader.cpp @ 444]
chrome_2580000!webkit_glue::WebURLLoaderImpl::Context::OnCompletedRequest+0x18c [c:\b\slave\chromium-rel-xp\build\src\webkit\glue\weburlloader_impl.cc @ 619]
chrome_2580000!ResourceDispatcher::OnRequestComplete+0x8f [c:\b\slave\chromium-rel-xp\build\src\chrome\common\resource_dispatcher.cc @ 470]
chrome_2580000!IPC::MessageWithTuple<Tuple3<int,URLRequestStatus,std::basic_string<char,std::char_traits<char>,std::allocator<char> > > >::Dispatch<ResourceDispatcher,void (__thiscall ResourceDispatcher::*)(int,URLRequestStatus const &,std::basic_string<char,std::char_traits<char>,std::allocator<char> > const &)>+0x5b [c:\b\slave\chromium-rel-xp\build\src\ipc\ipc_message_utils.h @ 1042]
chrome_2580000!ResourceDispatcher::DispatchMessageW+0xa1 [c:\b\slave\chromium-rel-xp\build\src\chrome\common\resource_dispatcher.cc @ 537]
chrome_2580000!ResourceDispatcher::OnMessageReceived+0x27f [c:\b\slave\chromium-rel-xp\build\src\chrome\common\resource_dispatcher.cc @ 303]
chrome_2580000!ChildThread::OnMessageReceived+0x1d [c:\b\slave\chromium-rel-xp\build\src\chrome\common\child_thread.cc @ 124]
chrome_2580000!RunnableMethod<CancelableRequest<CallbackRunner<Tuple2<int,std::vector<__int64,std::allocator<__int64> > *> > >,void (__thiscall CancelableRequest<CallbackRunner<Tuple2<int,std::vector<__int64,std::allocator<__int64> > *> > >::*)(Tuple2<int,std::vector<__int64,std::allocator<__int64> > *> const &),Tuple1<Tuple2<int,std::vector<__int64,std::allocator<__int64> > *> > >::Run+0x17 [c:\b\slave\chromium-rel-xp\build\src\base\task.h @ 327]
chrome_2580000!MessageLoop::RunTask+0xff [c:\b\slave\chromium-rel-xp\build\src\base\message_loop.cc @ 410]
chrome_2580000!MessageLoop::DoWork+0x176 [c:\b\slave\chromium-rel-xp\build\src\base\message_loop.cc @ 525]
chrome_2580000!base::MessagePumpDefault::Run+0x117 [c:\b\slave\chromium-rel-xp\build\src\base\message_pump_default.cc @ 50]
chrome_2580000!MessageLoop::RunInternal+0x92 [c:\b\slave\chromium-rel-xp\build\src\base\message_loop.cc @ 257]
chrome_2580000!MessageLoop::Run+0x5b [c:\b\slave\chromium-rel-xp\build\src\base\message_loop.cc @ 208]
chrome_2580000!RendererMain+0x314 [c:\b\slave\chromium-rel-xp\build\src\chrome\renderer\renderer_main.cc @ 292]
chrome_2580000!ChromeMain+0x8d8 [c:\b\slave\chromium-rel-xp\build\src\chrome\app\chrome_dll_main.cc @ 786]
chrome!MainDllLoader::Launch+0x199 [c:\b\slave\chromium-rel-xp\build\src\chrome\app\client_util.cc @ 241]
chrome!wWinMain+0x97 [c:\b\slave\chromium-rel-xp\build\src\chrome\app\chrome_exe_main.cc @ 47]
chrome!__tmainCRTStartup+0x112 [f:\dd\vctools\crt_bld\self_x86\crt\src\crt0.c @ 263]
WARNING: Stack unwind information not available. Following frames may be wrong.