<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>39008</bug_id>
          
          <creation_ts>2010-05-12 11:37:39 -0700</creation_ts>
          <short_desc>REGRESSION (r58950): Webkit crashes on clicking back button when in hotmail</short_desc>
          <delta_ts>2010-05-14 13:32:44 -0700</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>DOM</component>
          <version>528+ (Nightly build)</version>
          <rep_platform>Mac (Intel)</rep_platform>
          <op_sys>OS X 10.6</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          
          <bug_file_loc>http://www.hotmail.com</bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords>InRadar, Regression</keywords>
          <priority>P1</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Seamus Roche">seamusjr</reporter>
          <assigned_to name="Alexey Proskuryakov">ap</assigned_to>
          <cc>alice.barraclough</cc>
    
    <cc>ap</cc>
    
    <cc>beidson</cc>
    
    <cc>ddkilzer</cc>
    
    <cc>joepeck</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>224762</commentid>
    <comment_count>0</comment_count>
    <who name="Seamus Roche">seamusjr</who>
    <bug_when>2010-05-12 11:37:39 -0700</bug_when>
    <thetext>Stack trace:


Process:         Safari [3990]
Path:            /Applications/Safari.app/Contents/MacOS/Safari
Identifier:      org.webkit.nightly.WebKit
Version:         r59204 (59204)
Code Type:       X86-64 (Native)
Parent Process:  launchd [135]

Date/Time:       2010-05-12 13:16:56.774 -0500
OS Version:      Mac OS X 10.6.3 (10D2094)
Report Version:  6

Interval Since Last Report:          295007 sec
Crashes Since Last Report:           22
Per-App Interval Since Last Report:  14500 sec
Per-App Crashes Since Last Report:   2
Anonymous UUID:                      31DA81C2-EB46-44AC-8ACD-60DF7A2B6CA6

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000000000bb49
Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   ???                           	0x000000000000bb49 0 + 47945
1   com.apple.WebCore             	0x0000000100c4fd18 WebCore::JSHTMLDocument::write(JSC::ExecState*, JSC::ArgList const&amp;) + 24
2   com.apple.WebCore             	0x0000000100c4c129 WebCore::jsHTMLDocumentPrototypeFunctionWrite(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, JSC::ArgList const&amp;) + 137
3   ???                           	0x0000237fe34001b4 0 + 39032180441524
4   com.apple.JavaScriptCore      	0x00000001005aaa5c JSC::Interpreter::execute(JSC::FunctionExecutable*, JSC::ExecState*, JSC::JSFunction*, JSC::JSObject*, JSC::ArgList const&amp;, JSC::ScopeChainNode*, JSC::JSValue*) + 508
5   ???                           	0x000000011fdd1780 0 + 4829550464
6   ???                           	0x00000001202e6280 0 + 4834878080
7   com.apple.WebCore             	0x0000000100bffee0 WebCore::JSDOMWindowShell::~JSDOMWindowShell() + 0
8   ???                           	0x909090909090ffff 0 + 10416984888683069439

Thread 1:  Dispatch queue: com.apple.libdispatch-manager
0   libSystem.B.dylib             	0x00007fff84eea4ea kevent + 10
1   libSystem.B.dylib             	0x00007fff84eec3bd _dispatch_mgr_invoke + 154
2   libSystem.B.dylib             	0x00007fff84eec094 _dispatch_queue_invoke + 185
3   libSystem.B.dylib             	0x00007fff84eebbbe _dispatch_worker_thread2 + 252
4   libSystem.B.dylib             	0x00007fff84eeb4e8 _pthread_wqthread + 353
5   libSystem.B.dylib             	0x00007fff84eeb385 start_wqthread + 13

Thread 2:  WebCore: IconDatabase
0   libSystem.B.dylib             	0x00007fff84f0c316 __semwait_signal + 10
1   libSystem.B.dylib             	0x00007fff84f10131 _pthread_cond_wait + 1286
2   com.apple.WebCore             	0x0000000100af2349 WebCore::IconDatabase::syncThreadMainLoop() + 249
3   com.apple.WebCore             	0x0000000100af247c WebCore::IconDatabase::iconDatabaseSyncThread() + 172
4   libSystem.B.dylib             	0x00007fff84f0a8b6 _pthread_start + 331
5   libSystem.B.dylib             	0x00007fff84f0a769 thread_start + 13

Thread 3:  Safari: SafeBrowsingManager
0   libSystem.B.dylib             	0x00007fff84ed175a mach_msg_trap + 10
1   libSystem.B.dylib             	0x00007fff84ed1dcd mach_msg + 59
2   com.apple.CoreFoundation      	0x00007fff84197452 __CFRunLoopRun + 1698
3   com.apple.CoreFoundation      	0x00007fff841968df CFRunLoopRunSpecific + 575
4   com.apple.Safari              	0x000000010002503f 0x100000000 + 151615
5   com.apple.Safari              	0x0000000100024fcf 0x100000000 + 151503
6   libSystem.B.dylib             	0x00007fff84f0a8b6 _pthread_start + 331
7   libSystem.B.dylib             	0x00007fff84f0a769 thread_start + 13

Thread 4:
0   libSystem.B.dylib             	0x00007fff84ed175a mach_msg_trap + 10
1   libSystem.B.dylib             	0x00007fff84ed1dcd mach_msg + 59
2   com.apple.CoreFoundation      	0x00007fff84197452 __CFRunLoopRun + 1698
3   com.apple.CoreFoundation      	0x00007fff841968df CFRunLoopRunSpecific + 575
4   com.apple.Foundation          	0x00007fff884074e3 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 297
5   com.apple.Foundation          	0x00007fff88387ead __NSThread__main__ + 1429
6   libSystem.B.dylib             	0x00007fff84f0a8b6 _pthread_start + 331
7   libSystem.B.dylib             	0x00007fff84f0a769 thread_start + 13

Thread 5:
0   libSystem.B.dylib             	0x00007fff84f15286 select$DARWIN_EXTSN + 10
1   com.apple.CoreFoundation      	0x00007fff841b8ef2 __CFSocketManager + 818
2   libSystem.B.dylib             	0x00007fff84f0a8b6 _pthread_start + 331
3   libSystem.B.dylib             	0x00007fff84f0a769 thread_start + 13

Thread 6:  Safari: SnapshotStore
0   libSystem.B.dylib             	0x00007fff84f0c316 __semwait_signal + 10
1   libSystem.B.dylib             	0x00007fff84f10131 _pthread_cond_wait + 1286
2   com.apple.JavaScriptCore      	0x00000001006ae980 WTF::ThreadCondition::timedWait(WTF::Mutex&amp;, double) + 64
3   com.apple.Safari              	0x0000000100120f93 0x100000000 + 1183635
4   com.apple.Safari              	0x0000000100043de3 0x100000000 + 277987
5   com.apple.Safari              	0x0000000100043c7f 0x100000000 + 277631
6   libSystem.B.dylib             	0x00007fff84f0a8b6 _pthread_start + 331
7   libSystem.B.dylib             	0x00007fff84f0a769 thread_start + 13

Thread 7:
0   libSystem.B.dylib             	0x00007fff84ed175a mach_msg_trap + 10
1   libSystem.B.dylib             	0x00007fff84ed1dcd mach_msg + 59
2   com.apple.QuartzCore          	0x00007fff806e8942 CA::Render::Server::server_thread(void*) + 177
3   com.apple.QuartzCore          	0x00007fff806e8882 thread_fun + 34
4   libSystem.B.dylib             	0x00007fff84f0a8b6 _pthread_start + 331
5   libSystem.B.dylib             	0x00007fff84f0a769 thread_start + 13

Thread 8:
0   libSystem.B.dylib             	0x00007fff84eeb30a __workq_kernreturn + 10
1   libSystem.B.dylib             	0x00007fff84eeb71c _pthread_wqthread + 917
2   libSystem.B.dylib             	0x00007fff84eeb385 start_wqthread + 13

Thread 9:  Safari: SpinningProgressIndicator
0   libSystem.B.dylib             	0x00007fff84ed175a mach_msg_trap + 10
1   libSystem.B.dylib             	0x00007fff84ed1dcd mach_msg + 59
2   com.apple.CoreFoundation      	0x00007fff84197452 __CFRunLoopRun + 1698
3   com.apple.CoreFoundation      	0x00007fff841968df CFRunLoopRunSpecific + 575
4   com.apple.Foundation          	0x00007fff883c2a38 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 270
5   com.apple.Foundation          	0x00007fff883c2917 -[NSRunLoop(NSRunLoop) run] + 77
6   com.apple.Safari              	0x0000000100035165 0x100000000 + 217445
7   com.apple.Foundation          	0x00007fff88387ead __NSThread__main__ + 1429
8   libSystem.B.dylib             	0x00007fff84f0a8b6 _pthread_start + 331
9   libSystem.B.dylib             	0x00007fff84f0a769 thread_start + 13

Thread 10:
0   libSystem.B.dylib             	0x00007fff84eea4ea kevent + 10
1   libSystem.B.dylib             	0x00007fff84f29128 _mdns_query_mDNSResponder + 1061
2   libSystem.B.dylib             	0x00007fff84f283fe _mdns_search + 1140
3   libSystem.B.dylib             	0x00007fff84f2779c _mdns_addrinfo + 715
4   libSystem.B.dylib             	0x00007fff84f2681f search_addrinfo + 146
5   libSystem.B.dylib             	0x00007fff84f26248 si_addrinfo + 1352
6   libSystem.B.dylib             	0x00007fff84f3d40b si_async_launchpad + 94
7   libSystem.B.dylib             	0x00007fff84f0a8b6 _pthread_start + 331
8   libSystem.B.dylib             	0x00007fff84f0a769 thread_start + 13

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000122f5e400  rbx: 0x000000011e188e40  rcx: 0x0000000000011f01  rdx: 0x0000000000000013
  rdi: 0x0000000125c69000  rsi: 0x0000000000000000  rbp: 0x00007fff5fbfe290  rsp: 0x00007fff5fbfe088
   r8: 0x0000000101fb3478   r9: 0x0000000000000008  r10: 0x0000000000000000  r11: 0x000000000000bb49
  r12: 0x0000000117fa22f0  r13: 0x00007fff5fbfe2e0  r14: 0xffff000000000000  r15: 0xffff000000000002
  rip: 0x000000000000bb49  rfl: 0x0000000000010206  cr2: 0x000000000000bb49

Binary Images:
       0x100000000 -        0x100251fe7  com.apple.Safari 4.0.5 (6531.22.7) &lt;2865F6F2-717F-20BB-D01C-C3E768EDF09A&gt; /Applications/Safari.app/Contents/MacOS/Safari
       0x1002dc000 -        0x1002dffff +WebKitNightlyEnabler.dylib ??? (???) &lt;E1C51E6D-FB78-67B2-0F35-15C1ED6478D7&gt; /Applications/WebKit (58638).app/Contents/Resources/WebKitNightlyEnabler.dylib
       0x1002e4000 -        0x100460ff7  com.apple.WebKit r59204 (533.9+) &lt;AFFBE020-CA60-C080-7799-C945564A6448&gt; /Applications/WebKit (58638).app/Contents/Frameworks/10.6/WebKit.framework/Versions/A/WebKit
       0x10052a000 -        0x100715fff  com.apple.JavaScriptCore 533+ (533.9+) &lt;6BD71E4A-D194-760C-95C6-3D6481F5FA4F&gt; /Applications/WebKit (58638).app/Contents/Frameworks/10.6/JavaScriptCore.framework/Versions/A/JavaScriptCore
       0x100784000 -        0x1014d9fff  com.apple.WebCore 533+ (533.9+) &lt;E307BD01-A378-3520-A07D-48F595101460&gt; /Applications/WebKit (58638).app/Contents/Frameworks/10.6/WebCore.framework/Versions/A/WebCore
       0x101b2c000 -        0x101b55ff7 +org.andymatuschak.Sparkle 1.5 Beta (git) (830f633) &lt;945EA036-7EC3-D020-C889-29ECB588B891&gt; /Applications/WebKit (58638).app/Contents/Frameworks/10.6/Sparkle.framework/Versions/A/Sparkle
       0x101b70000 -        0x101c56fe7  libcrypto.0.9.7.dylib 0.9.7 (compatibility 0.9.7) &lt;BA5E5276-8696-906D-0A37-0FFEF022B482&gt; /usr/lib/libcrypto.0.9.7.dylib
       0x1183bc000 -        0x1183bcfff  com.apple.JavaPluginCocoa 13.1.0 (13.1.0) &lt;481A3D00-E36A-DF89-8FD1-683F81FCF0E8&gt; /System/Library/Frameworks/JavaVM.framework/Versions/A/Resources/JavaPluginCocoa.bundle/Contents/MacOS/JavaPluginCocoa
       0x118703000 -        0x118704fff  ATSHI.dylib ??? (???) &lt;054AC6AB-70DD-C7E1-80F6-9607B7F1C5D7&gt; /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/Resources/ATSHI.dylib
       0x118817000 -        0x11881bff7  libFontRegistryUI.dylib ??? (???) &lt;ED58537C-9208-9B25-5C59-AAEDE230E7AE&gt; /System/Library/Frameworks/ApplicationServices.framework/Frameworks/ATS.framework/Resources/libFontRegistryUI.dylib
       0x1188a8000 -        0x1188b0ff7  com.apple.JavaVM 13.1.0 (13.1.0) &lt;AB562F6D-7D29-20CE-F910-F2A82DADBA35&gt; /System/Library/Frameworks/JavaVM.framework/Versions/A/JavaVM
       0x118d7b000 -        0x118d87fff +com.evernote.EvernoteSafariClipperPlugin 1.0 (81701) &lt;1B438C68-92EC-C72B-7706-B8CC642B4B05&gt; /Users/seamusjr/Library/Internet Plug-Ins/EvernoteSafariClipperPlugin.webplugin/Contents/MacOS/EvernoteSafariClipperPlugin
       0x120b9e000 -        0x120bc4fe7  GLRendererFloat ??? (???) &lt;352FC221-C3DB-283A-4A47-8D2EA8D8F0E8&gt; /System/Library/Frameworks/OpenGL.framework/Resources/GLRendererFloat.bundle/GLRendererFloat
       0x121229000 -        0x1213b6fe7  GLEngine ??? (???) &lt;A55922C2-4862-3372-C5BE-6BDBEC6C90EE&gt; /System/Library/Frameworks/OpenGL.framework/Resources/GLEngine.bundle/GLEngine
       0x1213e7000 -        0x121809ff7  libclh.dylib 3.1.1 C  (3.1.1) &lt;E264AD2D-210A-2408-310E-A7ACE8A0E4CF&gt; /System/Library/Extensions/GeForceGLDriver.bundle/Contents/MacOS/libclh.dylib
       0x121837000 -        0x1226eefe7  com.apple.driver.AppleIntelHDGraphicsGLDriver 1.6.14 (6.1.4) &lt;CE67EF1A-0135-C5A0-29CA-6EC02CDC51D4&gt; /System/Library/Extensions/AppleIntelHDGraphicsGLDriver.bundle/Contents/MacOS/AppleIntelHDGraphicsGLDriver
       0x200000000 -        0x2006c3fe7  com.apple.GeForceGLDriver 1.6.14 (6.1.4) &lt;AF73060D-398F-3DFE-3C34-3ADAAAE47559&gt; /System/Library/Extensions/GeForceGLDriver.bundle/Contents/MacOS/GeForceGLDriver
    0x7fff5fc00000 -     0x7fff5fc3bdef  dyld 132.1 (???) &lt;9B995E17-37AC-B849-C124-E97BE32B778A&gt; /usr/lib/dyld
    0x7fff80003000 -     0x7fff8000bfff  com.apple.DisplayServicesFW 2.2.2 (251) &lt;4243F9AF-4BCA-7F6F-B9A2-D9A08409B5DC&gt; /System/Library/PrivateFrameworks/DisplayServices.framework/Versions/A/DisplayServices
    0x7fff80056000 -     0x7fff800d5fff  com.apple.audio.CoreAudio 3.2.2 (3.2.2) &lt;0FBE15EE-AF44-ECEF-9862-A96A193F5AD2&gt; /System/Library/Frameworks/CoreAudio.framework/Versions/A/CoreAudio
    0x7fff800d6000 -     0x7fff8010bff7  libcups.2.dylib 2.8.0 (compatibility 2.0.0) &lt;FBDDC46F-0B24-7F81-EBE6-9CF093CA4C8B&gt; /usr/lib/libcups.2.dylib
    0x7fff8010c000 -     0x7fff80174fff  com.apple.AppleVAFramework 4.8.12 (4.8.12) &lt;075768D2-1992-7513-F8C8-94348018DA4A&gt; /System/Library/PrivateFrameworks/AppleVA.framework/Versions/A/AppleVA
    0x7fff80175000 -     0x7fff801a6fff  libGLImage.dylib ??? (???) &lt;B8F8BB6F-7E97-54F0-B1AA-0C7495C27EAE&gt; /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGLImage.dylib
    0x7fff801a7000 -     0x7fff802ccfef  com.apple.audio.toolbox.AudioToolbox 1.6.3 (1.6.3) &lt;4931DCF6-072F-A4FA-0989-4C4B83BDF98A&gt; /System/Library/Frameworks/AudioToolbox.framework/Versions/A/AudioToolbox
    0x7fff8056b000 -     0x7fff80571ff7  IOSurface ??? (???) &lt;6D342A80-7C22-E633-67A5-FA51DAA601E4&gt; /System/Library/Frameworks/IOSurface.framework/Versions/A/IOSurface
    0x7fff80572000 -     0x7fff80595fff  com.apple.opencl 12.1 (12.1) &lt;81E2DFC2-2C00-AA3D-55F7-A34721213516&gt; /System/Library/Frameworks/OpenCL.framework/Versions/A/OpenCL
    0x7fff8059b000 -     0x7fff80658ff7  com.apple.CoreServices.OSServices 357 (357) &lt;0DD3B712-16C1-09EF-5894-D403A33BDB73&gt; /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/OSServices.framework/Versions/A/OSServices
    0x7fff80696000 -     0x7fff80a2efe7  com.apple.QuartzCore 1.6.1 (227.18) &lt;73B865F9-157B-F864-7214-A1FBDFD22A8A&gt; /System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore
    0x7fff80a2f000 -     0x7fff80a43ff7  com.apple.speech.synthesis.framework 3.10.35 (3.10.35) &lt;63C87CF7-56B3-4038-8136-8C26E96AD42F&gt; /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/SpeechSynthesis.framework/Versions/A/SpeechSynthesis
    0x7fff80a44000 -     0x7fff80a51fe7  libCSync.A.dylib 543.34.0 (compatibility 64.0.0) &lt;C389970F-FCD6-76A2-87D9-A8CFC1DD3EDE&gt; /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/Resources/libCSync.A.dylib
    0x7fff80a52000 -     0x7fff80a5dff7  com.apple.speech.recognition.framework 3.11.1 (3.11.1) &lt;60484D84-BA63-13DD-50E9-ABDA402C3C45&gt; /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/SpeechRecognition.framework/Versions/A/SpeechRecognition
    0x7fff80a9d000 -     0x7fff80bbcff7  com.apple.PubSub 1.0.4 (65.12.1) &lt;52F510C5-05AF-6FA1-63A1-7E6E3D9580CA&gt; /System/Library/Frameworks/PubSub.framework/Versions/A/PubSub
    0x7fff80bbd000 -     0x7fff80bd3fff  com.apple.ImageCapture 6.0 (6.0) &lt;BF702F65-8E30-E318-1B58-AE6C0D5E5715&gt; /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/ImageCapture.framework/Versions/A/ImageCapture
    0x7fff80bd4000 -     0x7fff80beaff7  com.apple.MultitouchSupport.framework 204.13 (204.13) &lt;FB283E51-94DC-D1C0-0EFC-7B773966EDAF&gt; /System/Library/PrivateFrameworks/MultitouchSupport.framework/Versions/A/MultitouchSupport
    0x7fff80beb000 -     0x7fff80f1efef  com.apple.CoreServices.CarbonCore 861.6 (861.6) &lt;80DFB173-E3FB-E232-CEDE-77AE5B3EACA2&gt; /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/CarbonCore
    0x7fff80f1f000 -     0x7fff80f24ff7  com.apple.CommonPanels 1.2.4 (91) &lt;4D84803B-BD06-D80E-15AE-EFBE43F93605&gt; /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/CommonPanels.framework/Versions/A/CommonPanels
    0x7fff81124000 -     0x7fff81133ff7  com.apple.opengl 1.6.7 (1.6.7) &lt;4BF5C593-3666-16B2-86FF-B0C27ED28BFD&gt; /System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL
    0x7fff811a2000 -     0x7fff814a0fef  com.apple.HIToolbox 1.6.2 (???) &lt;3A6CD66E-A65D-9DC2-0FEF-32D31CBEF3DD&gt; /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox
    0x7fff814a1000 -     0x7fff81503fe7  com.apple.datadetectorscore 2.0 (80.7) &lt;5F0F865C-A80F-FE7F-7DF8-894A4A99EACA&gt; /System/Library/PrivateFrameworks/DataDetectorsCore.framework/Versions/A/DataDetectorsCore
    0x7fff81504000 -     0x7fff8154dfef  libGLU.dylib ??? (???) &lt;8E418680-E31D-C85B-F4A4-DDE013E7F367&gt; /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGLU.dylib
    0x7fff8154e000 -     0x7fff815a3fef  com.apple.framework.familycontrols 2.0.1 (2010) &lt;5494ABA6-0E9F-4CA2-120C-DBC240CC7FCF&gt; /System/Library/PrivateFrameworks/FamilyControls.framework/Versions/A/FamilyControls
    0x7fff815e3000 -     0x7fff816c9fe7  com.apple.DesktopServices 1.5.5 (1.5.5) &lt;BB62B39C-4FB4-5AA4-4D5D-2BE07C216BE9&gt; /System/Library/PrivateFrameworks/DesktopServicesPriv.framework/Versions/A/DesktopServicesPriv
    0x7fff816ca000 -     0x7fff816d6fff  libbz2.1.0.dylib 1.0.5 (compatibility 1.0.0) &lt;5C1F2A2C-3AA4-5362-FA7F-D6BCAAC9B02C&gt; /usr/lib/libbz2.1.0.dylib
    0x7fff816d7000 -     0x7fff8195cfef  com.apple.security 6.1.1 (37594) &lt;BC09FE8A-6325-494B-C9F1-DAE768F58DC6&gt; /System/Library/Frameworks/Security.framework/Versions/A/Security
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    0x7fff8743c000 -     0x7fff87479ff7  libFontRegistry.dylib ??? (???) &lt;DD501984-1941-4112-7063-8F52BC336DE9&gt; /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/Resources/libFontRegistry.dylib
    0x7fff87612000 -     0x7fff8768ffef  libstdc++.6.dylib 7.9.0 (compatibility 7.0.0) &lt;35ECA411-2C08-FD7D-11B1-1B7A04921A5C&gt; /usr/lib/libstdc++.6.dylib
    0x7fff877d0000 -     0x7fff877f0ff7  com.apple.DirectoryService.Framework 3.6 (621.3) &lt;34B17024-866F-70AF-2098-4B5FCF57AE52&gt; /System/Library/Frameworks/DirectoryService.framework/Versions/A/DirectoryService
    0x7fff877f1000 -     0x7fff877f1ff7  com.apple.Accelerate.vecLib 3.6 (vecLib 3.6) &lt;DA9BFF01-40DF-EBD5-ABB7-787DAF2D77CF&gt; /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/vecLib
    0x7fff87827000 -     0x7fff878e0fff  libsqlite3.dylib 9.6.0 (compatibility 9.0.0) &lt;5A15E12A-AE8F-1A36-BBC7-564E7D7AD0FB&gt; /usr/lib/libsqlite3.dylib
    0x7fff878e1000 -     0x7fff878f7fef  libbsm.0.dylib ??? (???) &lt;83676D2E-23CD-45CD-BE5C-35FCFFBBBDBB&gt; /usr/lib/libbsm.0.dylib
    0x7fff87950000 -     0x7fff87999ff7  com.apple.securityinterface 4.0.1 (37214) &lt;C22EEFC8-92E8-EC11-B967-FD790D39F9AB&gt; /System/Library/Frameworks/SecurityInterface.framework/Versions/A/SecurityInterface
    0x7fff87a11000 -     0x7fff8810e037  com.apple.CoreGraphics 1.543.34 (???) &lt;31C0EC15-C448-2387-E84B-E943758A2BA3&gt; /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/CoreGraphics.framework/Versions/A/CoreGraphics
    0x7fff8810f000 -     0x7fff88219ff7  com.apple.MeshKitIO 1.1 (49.2) &lt;B9E2EB6C-66F6-CFAD-4530-DDA4355D7FBA&gt; /System/Library/PrivateFrameworks/MeshKit.framework/Versions/A/Frameworks/MeshKitIO.framework/Versions/A/MeshKitIO
    0x7fff8821a000 -     0x7fff8821aff7  com.apple.Cocoa 6.6 (???) &lt;68B0BE46-6E24-C96F-B341-054CF9E8F3B6&gt; /System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa
    0x7fff8821b000 -     0x7fff88241fe7  libJPEG.dylib ??? (???) &lt;440FA813-F1E2-FCC3-BE63-500A45F972BE&gt; /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/Resources/libJPEG.dylib
    0x7fff882ee000 -     0x7fff88327ff7  com.apple.MeshKit 1.1 (49.2) &lt;2860E92F-5B68-E8DD-0E8F-BF3DD6ACF330&gt; /System/Library/PrivateFrameworks/MeshKit.framework/Versions/A/MeshKit
    0x7fff88328000 -     0x7fff88346fff  libPng.dylib ??? (???) &lt;B7CA0853-6A58-7D98-8288-789C2D3EBACC&gt; /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/Resources/libPng.dylib
    0x7fff88347000 -     0x7fff88376ff7  com.apple.quartzfilters 1.6.0 (1.6.0) &lt;9CECB4FC-1CCF-B8A2-B935-5888B21CBEEF&gt; /System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/QuartzFilters.framework/Versions/A/QuartzFilters
    0x7fff88377000 -     0x7fff885f8fe7  com.apple.Foundation 6.6.2 (751.21) &lt;83E7623F-159A-EA50-44B9-B59FBD36A393&gt; /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
    0x7fff885f9000 -     0x7fff88640ff7  com.apple.coreui 2 (114) &lt;BB09E685-1F5D-0676-1A0E-295610B387A8&gt; /System/Library/PrivateFrameworks/CoreUI.framework/Versions/A/CoreUI
    0x7fff88641000 -     0x7fff8877ffff  com.apple.CoreData 102.1 (251) &lt;782F29CA-ACC7-4A77-5772-52FBE2CEFB5E&gt; /System/Library/Frameworks/CoreData.framework/Versions/A/CoreData
    0x7fff88780000 -     0x7fff88802fff  com.apple.QuickLookUIFramework 2.2 (327.4) &lt;18A5C284-8ED5-7061-5D8C-F91D74130AF8&gt; /System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/QuickLookUI.framework/Versions/A/QuickLookUI
    0x7fff88803000 -     0x7fff888a3fff  com.apple.LaunchServices 362.1 (362.1) &lt;4529EF9C-45C7-E2E3-6726-4A5AD382566D&gt; /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/LaunchServices
    0x7fff888a4000 -     0x7fff888dcff7  libssl.0.9.8.dylib 0.9.8 (compatibility 0.9.8) &lt;9AD9F3ED-1C29-8B41-079F-80426FA85CEC&gt; /usr/lib/libssl.0.9.8.dylib
    0x7fff888dd000 -     0x7fff88927ff7  com.apple.Metadata 10.6.3 (507.8) &lt;2193434D-C43B-C1D8-6326-48B25C0CCA11&gt; /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Metadata
    0x7fff88928000 -     0x7fff88b92fe7  com.apple.QuartzComposer 4.1 (156.13) &lt;88CAE5C0-DD7C-96DC-B891-0BC07F08A7D4&gt; /System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/QuartzComposer.framework/Versions/A/QuartzComposer
    0x7fff88b93000 -     0x7fff88b93ff7  com.apple.Carbon 150 (152) &lt;CD519A75-306B-D53E-746A-14850E92390A&gt; /System/Library/Frameworks/Carbon.framework/Versions/A/Carbon
    0x7fff88b94000 -     0x7fff88be3fef  libTIFF.dylib ??? (???) &lt;87349890-8ACA-C2FD-D8A7-1617A27D88BF&gt; /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ImageIO.framework/Versions/A/Resources/libTIFF.dylib
    0x7fff88be4000 -     0x7fff88d53ff7  com.apple.QTKit 7.6.6 (1729) &lt;0B8D0737-FCB0-954C-9732-920F63B22C54&gt; /System/Library/Frameworks/QTKit.framework/Versions/A/QTKit
    0x7fff88d54000 -     0x7fff88d96fef  com.apple.CoreMedia 0.484.5 (484.5) &lt;884505D7-8A7C-181F-7944-B40CB321A882&gt; /System/Library/PrivateFrameworks/CoreMedia.framework/Versions/A/CoreMedia
    0x7fffffe00000 -     0x7fffffe01fff  libSystem.B.dylib ??? (???) &lt;D8F3BC70-08DE-8D03-2930-2ACC3F05F5ED&gt; /usr/lib/libSystem.B.dylib

Model: MacBookPro6,2, BootROM MBP61.0057.B07, 2 processors, Intel Core i7, 2.66 GHz, 4 GB, SMC 1.58f16
Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 512 MB
Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
Memory Module: global_name
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.10.131.14.7)
Bluetooth: Version 2.3.2f5, 2 service, 19 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: ST9500420ASG, 465.76 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: Hub, 0x0424  (SMSC), 0x2514, 0xfd100000
USB Device: Built-in iSight, 0x05ac  (Apple Inc.), 0x8507, 0xfd110000
USB Device: IR Receiver, 0x05ac  (Apple Inc.), 0x8242, 0xfd120000
USB Device: Hub, 0x0424  (SMSC), 0x2514, 0xfa100000
USB Device: BRCM2070 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0xfa110000
USB Device: Bluetooth USB Host Controller, 0x05ac  (Apple Inc.), 0x8218, 0xfa113000
USB Device: Internal Memory Card Reader, 0x05ac  (Apple Inc.), 0x8403, 0xfa130000
USB Device: Apple Internal Keyboard / Trackpad, 0x05ac  (Apple Inc.), 0x0236, 0xfa120000</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>224904</commentid>
    <comment_count>1</comment_count>
    <who name="Mark Rowe (bdash)">mrowe</who>
    <bug_when>2010-05-12 14:35:55 -0700</bug_when>
    <thetext>&lt;rdar://problem/7976142&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>225531</commentid>
    <comment_count>2</comment_count>
    <who name="Alice Liu">alice.barraclough</who>
    <bug_when>2010-05-13 15:13:04 -0700</bug_when>
    <thetext>has anyone else reproduced this?  please comment if you have, thanks!</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>225579</commentid>
    <comment_count>3</comment_count>
    <who name="Alexey Proskuryakov">ap</who>
    <bug_when>2010-05-13 17:07:18 -0700</bug_when>
    <thetext>Caused by synchronous document.write fix in bug 38146.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>225635</commentid>
    <comment_count>4</comment_count>
    <who name="Joseph Pecoraro">joepeck</who>
    <bug_when>2010-05-13 20:15:27 -0700</bug_when>
    <thetext>I created a Hotmail account, and using the nightly mentioned by the originator (r59204) I habe able to reproduce this problem a few times. Just hammering back / forward and jumping between the Inbox and New message screens. I haven&apos;t been able to get concrete steps, so maybe this is based on advertisements.

It took a lot longer, but I finally hit an ASSERT in a debug build:


ASSERTION FAILED: item-&gt;documentSequenceNumber() == history()-&gt;currentItem()-&gt;documentSequenceNumber()
(/Users/pecoraro/Code/webkit-open-source/WebCore/loader/FrameLoader.cpp:3647 void WebCore::FrameLoader::navigateWithinDocument(WebCore::HistoryItem*))

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x00000000bbadbeef
0x00000001017150b8 in WebCore::FrameLoader::navigateWithinDocument (this=0x1118b1850, item=0x105abb6e0) at /Users/pecoraro/Code/webkit-open-source/WebCore/loader/FrameLoader.cpp:3647
3647	    ASSERT(item-&gt;documentSequenceNumber() == history()-&gt;currentItem()-&gt;documentSequenceNumber());
(gdb) bt
#0  0x00000001017150b8 in WebCore::FrameLoader::navigateWithinDocument (this=0x1118b1850, item=0x105abb6e0) at /Users/pecoraro/Code/webkit-open-source/WebCore/loader/FrameLoader.cpp:3647
#1  0x00000001017182f0 in WebCore::FrameLoader::loadItem (this=0x1118b1850, item=0x105abb6e0, loadType=WebCore::FrameLoadTypeBack) at /Users/pecoraro/Code/webkit-open-source/WebCore/loader/FrameLoader.cpp:3786
#2  0x000000010177f25c in WebCore::HistoryController::recursiveGoToItem (this=0x1118b19c0, item=0x105abb6e0, fromItem=0x119ee8870, type=WebCore::FrameLoadTypeBack) at /Users/pecoraro/Code/webkit-open-source/WebCore/loader/HistoryController.cpp:598
#3  0x000000010177f3b8 in WebCore::HistoryController::goToItem (this=0x1118b19c0, targetItem=0x105abb6e0, type=WebCore::FrameLoadTypeBack) at /Users/pecoraro/Code/webkit-open-source/WebCore/loader/HistoryController.cpp:231
#4  0x0000000101b98da6 in WebCore::Page::goToItem (this=0x111006a80, item=0x105abb6e0, type=WebCore::FrameLoadTypeBack) at /Users/pecoraro/Code/webkit-open-source/WebCore/page/Page.cpp:308
#5  0x0000000101b98f5e in WebCore::Page::goBack (this=0x111006a80) at /Users/pecoraro/Code/webkit-open-source/WebCore/page/Page.cpp:237
#6  0x0000000100f2becd in -[WebView goBack] (self=0x111005180, _cmd=0x7fff8423c7cc) at /Users/pecoraro/Code/webkit-open-source/WebKit/mac/WebView/WebView.mm:3153
#7  0x0000000100f2165d in -[WebView(WebIBActions) goBack:] (self=0x111005180, _cmd=0x7fff879dd1c1, sender=0x10868b570) at /Users/pecoraro/Code/webkit-open-source/WebKit/mac/WebView/WebView.mm:3854
#8  0x0000000100090540 in ?? ()
#9  0x00007fff83c818ea in -[NSApplication sendAction:to:from:] ()
#10 0x00000001000498cd in ?? ()
#11 0x00007fff83c81849 in -[NSControl sendAction:to:] ()
#12 0x00007fff83d0d8d0 in -[NSSegmentedCell _sendActionFrom:] ()
#13 0x00007fff83d0d1af in -[NSCell trackMouse:inRect:ofView:untilMouseUp:] ()
#14 0x00007fff83d0c6c7 in -[NSSegmentedCell trackMouse:inRect:ofView:untilMouseUp:] ()
#15 0x00007fff83d0bc59 in -[NSControl mouseDown:] ()
#16 0x00007fff83c25f1b in -[NSWindow sendEvent:] ()
#17 0x00000001000456c3 in ?? ()
#18 0x000000010011eb72 in ?? ()
#19 0x00007fff83b5b662 in -[NSApplication sendEvent:] ()
#20 0x0000000100030e66 in ?? ()
#21 0x00007fff83af20aa in -[NSApplication run] ()
#22 0x00007fff83aead7c in NSApplicationMain ()
#23 0x0000000100001d78 in ?? ()</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>225658</commentid>
    <comment_count>5</comment_count>
    <who name="Joseph Pecoraro">joepeck</who>
    <bug_when>2010-05-13 21:18:27 -0700</bug_when>
    <thetext>After commenting out (but logging) when I hit the above ASSERT it looks like that doesn&apos;t cause a crash.

Doing some more &quot;stress testing&quot; of back &amp; forward I hit the following ASSERT. The other assert didn&apos;t appear to have been hit.

ASSERTION FAILED: !cachedPage || cachedPage-&gt;document() == m_frame-&gt;document()
(/Users/pecoraro/Code/webkit-open-source/WebCore/loader/HistoryController.cpp:197 void WebCore::HistoryController::invalidateCurrentItemCachedPage())

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x00000000bbadbeef
0x000000010177e9bf in WebCore::HistoryController::invalidateCurrentItemCachedPage (this=0x1130249c0) at /Users/pecoraro/Code/webkit-open-source/WebCore/loader/HistoryController.cpp:197
197	    ASSERT(!cachedPage || cachedPage-&gt;document() == m_frame-&gt;document());
(gdb) bt
#0  0x000000010177e9bf in WebCore::HistoryController::invalidateCurrentItemCachedPage (this=0x1130249c0) at /Users/pecoraro/Code/webkit-open-source/WebCore/loader/HistoryController.cpp:197
#1  0x0000000101712167 in WebCore::FrameLoader::receivedMainResourceError (this=0x113024850, error=@0x7fff5fbfe540, isComplete=true) at /Users/pecoraro/Code/webkit-open-source/WebCore/loader/FrameLoader.cpp:3311
#2  0x0000000101b38aba in WebCore::MainResourceLoader::didCancel (this=0x10807ce00, error=@0x7fff5fbfe540) at /Users/pecoraro/Code/webkit-open-source/WebCore/loader/MainResourceLoader.cpp:104
#3  0x0000000101d1db93 in WebCore::ResourceLoader::cancel (this=0x10807ce00, error=@0x7fff5fbfe5a0) at /Users/pecoraro/Code/webkit-open-source/WebCore/loader/ResourceLoader.cpp:362
#4  0x0000000101d1d2be in WebCore::ResourceLoader::cancel (this=0x10807ce00) at /Users/pecoraro/Code/webkit-open-source/WebCore/loader/ResourceLoader.cpp:352
#5  0x00000001015df406 in WebCore::DocumentLoader::stopLoading (this=0x108043e00, databasePolicy=WebCore::DatabasePolicyStop) at /Users/pecoraro/Code/webkit-open-source/WebCore/loader/DocumentLoader.cpp:232
#6  0x000000010170dbcf in WebCore::FrameLoader::stopAllLoaders (this=0x113024850, databasePolicy=WebCore::DatabasePolicyStop) at /Users/pecoraro/Code/webkit-open-source/WebCore/loader/FrameLoader.cpp:2214
#7  0x0000000101b98d8e in WebCore::Page::goToItem (this=0x111e50450, item=0x11abd14a0, type=WebCore::FrameLoadTypeForward) at /Users/pecoraro/Code/webkit-open-source/WebCore/page/Page.cpp:305
#8  0x0000000101b98f2a in WebCore::Page::goForward (this=0x111e50450) at /Users/pecoraro/Code/webkit-open-source/WebCore/page/Page.cpp:248
#9  0x0000000100f2be53 in -[WebView goForward] (self=0x111e4eb10, _cmd=0x7fff8423c7d8) at /Users/pecoraro/Code/webkit-open-source/WebKit/mac/WebView/WebView.mm:3161
#10 0x0000000100f21637 in -[WebView(WebIBActions) goForward:] (self=0x111e4eb10, _cmd=0x7fff879dd1b6, sender=0x105a8ef10) at /Users/pecoraro/Code/webkit-open-source/WebKit/mac/WebView/WebView.mm:3859
#11 0x000000010009180f in ?? ()
#12 0x00007fff83c818ea in -[NSApplication sendAction:to:from:] ()
#13 0x00000001000498cd in ?? ()
#14 0x00007fff83c81849 in -[NSControl sendAction:to:] ()
#15 0x00007fff83d0d8d0 in -[NSSegmentedCell _sendActionFrom:] ()
#16 0x00007fff83d0d1af in -[NSCell trackMouse:inRect:ofView:untilMouseUp:] ()
#17 0x00007fff83d0c6c7 in -[NSSegmentedCell trackMouse:inRect:ofView:untilMouseUp:] ()
#18 0x00007fff83d0bc59 in -[NSControl mouseDown:] ()
#19 0x00007fff83c25f1b in -[NSWindow sendEvent:] ()
#20 0x00000001000456c3 in ?? ()
#21 0x000000010011eb72 in ?? ()
#22 0x00007fff83b5b662 in -[NSApplication sendEvent:] ()
#23 0x0000000100030e66 in ?? ()
#24 0x00007fff83af20aa in -[NSApplication run] ()
#25 0x00007fff83aead7c in NSApplicationMain ()
#26 0x0000000100001d78 in ?? ()
Current language:  auto; currently c++
(gdb) p cachedPage
$1 = (&apos;WebCore::CachedPage&apos; *) 0x11ac59c60
(gdb) p cachedPage-&gt;document()
$2 = (class WebCore::Document *) 0x1142bcc00
(gdb) p m_frame-&gt;document()
$3 = (class WebCore::Document *) 0x106992600


I still haven&apos;t been able to reproduce the exact same crash with my ToT Debug build (r59438). =)</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>225661</commentid>
    <comment_count>6</comment_count>
    <who name="Alexey Proskuryakov">ap</who>
    <bug_when>2010-05-13 21:46:49 -0700</bug_when>
    <thetext>FWIW, I never saw any of these history controller assertions. If you can find exact steps to reproduce this, please file a new bug, as it&apos;s clearly a different issue.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>225663</commentid>
    <comment_count>7</comment_count>
    <who name="Joseph Pecoraro">joepeck</who>
    <bug_when>2010-05-13 22:05:20 -0700</bug_when>
    <thetext>I can only reproduce this with the r59204 nightly. Normally after just a few tries. My steps are.

  1. Navigate to hotmail.com
  2. Log in.
  3. Click &quot;New&quot; for a new email.
  4. Click &quot;Inbox&quot;
  5. Furiously go back and forth a few times.
  6. If that fails Go between &quot;Inbox&quot; and the &quot;Manage Folders&quot; link.

I haven&apos;t been able to reproduce this on ToT (debug). I just finished a release build.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>225668</commentid>
    <comment_count>8</comment_count>
    <who name="Joseph Pecoraro">joepeck</who>
    <bug_when>2010-05-13 22:14:47 -0700</bug_when>
    <thetext>Arg, I hit this with release build:

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: 0x000000000000000d, 0x0000000000000000
Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   com.apple.WebCore             	0x0000000100e85f14 WebCore::Document::write(WebCore::SegmentedString const&amp;, WebCore::Document*) + 148 (Document.cpp:223)
1   com.apple.WebCore             	0x00000001011c30f8 WebCore::JSHTMLDocument::write(JSC::ExecState*, JSC::ArgList const&amp;) + 24 (JSHTMLDocumentCustom.cpp:162)
2   com.apple.WebCore             	0x00000001011bf859 WebCore::jsHTMLDocumentPrototypeFunctionWrite(JSC::ExecState*, JSC::JSObject*, JSC::JSValue, JSC::ArgList const&amp;) + 137 (JSHTMLDocument.cpp:436)
3   ???                           	0x000036fb664002f4 0 + 60453380162292
4   com.apple.JavaScriptCore      	0x00000001007ce1dc JSC::Interpreter::executeCall(JSC::FunctionExecutable*, JSC::ExecState*, JSC::JSFunction*, JSC::JSObject*, JSC::ArgList const&amp;, JSC::ScopeChainNode*, JSC::JSValue*) + 508 (JITCode.h:77)
5   ???                           	0x0000000118954300 0 + 4707402496
6   ???                           	0x0000000119146780 0 + 4715734912
7   com.apple.WebCore             	0x0000000101173410 WebCore::JSDOMWindowShell::~JSDOMWindowShell() + 0 (JSDOMWindowShell.cpp:54)
8   ???                           	0x0000441f0f66ffff 0 + 74900193083391</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>225669</commentid>
    <comment_count>9</comment_count>
    <who name="Joseph Pecoraro">joepeck</who>
    <bug_when>2010-05-13 22:19:45 -0700</bug_when>
    <thetext>Weird that I can&apos;t get this to reproduce in the nightlies. I&apos;ve commented out both of the asserts I&apos;ve hit (in hopes it would lead to the crash) and I put logging there instead. I&apos;ve managed to reproduce both of those but not produce a crash. I&apos;m calling it a night.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>225674</commentid>
    <comment_count>10</comment_count>
      <attachid>56056</attachid>
    <who name="Alexey Proskuryakov">ap</who>
    <bug_when>2010-05-13 22:48:07 -0700</bug_when>
    <thetext>Created attachment 56056
reduced test case (will crash)

Attaching a reduced test case. As mentioned before, the actual fix is trivial, will wrap it up in the morning.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>225900</commentid>
    <comment_count>11</comment_count>
      <attachid>56083</attachid>
    <who name="Alexey Proskuryakov">ap</who>
    <bug_when>2010-05-14 10:13:42 -0700</bug_when>
    <thetext>Created attachment 56083
proposed fix

I removed the helper class, because:
1) I didn&apos;t like its name.
2) In a tricky place like this, it&apos;s probably best to be explicit about which tokenizer is being accessed.

Technically, it would be just as easy to have the checks in helper class by making it hold a Document pointer.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>225907</commentid>
    <comment_count>12</comment_count>
      <attachid>56083</attachid>
    <who name="Brady Eidson">beidson</who>
    <bug_when>2010-05-14 10:57:29 -0700</bug_when>
    <thetext>Comment on attachment 56083
proposed fix


&gt; @@ -1978,12 +1955,19 @@ void Document::write(const SegmentedStri
&gt;      if (!m_tokenizer)
&gt;          open(ownerDocument);
&gt;  
&gt; -    {
&gt; -        ASSERT(m_tokenizer);
&gt; -        SynchronousHTMLTokenizerGuard tokenizerGuard(m_tokenizer.get());
&gt; -        m_tokenizer-&gt;write(text, false);
&gt; +    ASSERT(m_tokenizer);
&gt; +    bool wasForcedSynchronous = false;
&gt; +    HTMLTokenizer* tokenizer = m_tokenizer-&gt;asHTMLTokenizer();
&gt; +    if (tokenizer) {
&gt; +        wasForcedSynchronous = tokenizer-&gt;forceSynchronous();
&gt; +        tokenizer-&gt;setForceSynchronous(true);
&gt;      }
&gt;  
&gt; +    m_tokenizer-&gt;write(text, false);
&gt; +
&gt; +    if (m_tokenizer &amp;&amp; tokenizer &amp;&amp; m_tokenizer-&gt;asHTMLTokenizer() == tokenizer)
&gt; +        tokenizer-&gt;setForceSynchronous(wasForcedSynchronous);
&gt; +

Couldn&apos;t this last if block also include &quot;!wasForcedSynchronous&quot; as a condition, and it would always tokenizer-&gt;setForceSynchronous(false)?

r+ with that consideration.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>225977</commentid>
    <comment_count>13</comment_count>
    <who name="Alexey Proskuryakov">ap</who>
    <bug_when>2010-05-14 13:32:44 -0700</bug_when>
    <thetext>Committed &lt;http://trac.webkit.org/changeset/59486&gt;.</thetext>
  </long_desc>
      
          <attachment
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          >
            <attachid>56056</attachid>
            <date>2010-05-13 22:48:07 -0700</date>
            <delta_ts>2010-05-13 22:48:07 -0700</delta_ts>
            <desc>reduced test case (will crash)</desc>
            <filename>test.html</filename>
            <type>text/html</type>
            <size>221</size>
            <attacher name="Alexey Proskuryakov">ap</attacher>
            
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          <attachment
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            <attachid>56083</attachid>
            <date>2010-05-14 10:13:42 -0700</date>
            <delta_ts>2010-05-14 10:57:29 -0700</delta_ts>
            <desc>proposed fix</desc>
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          </attachment>
      

    </bug>

</bugzilla>