[Webkit-unassigned] [Bug 57199] New: REGRESSION: Crash in WTF::fastFree()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=57199

           Summary: REGRESSION: Crash in WTF::fastFree()
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.6
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jon at jonshier.com


Recently I've begun encountering a crash in WTF::fastFree(). I'd say it's quite recent, probably within the last week. It occurs randomly but most frequently when closing a tab in Safari. This is r82081 in Safari 5.0.4 on 10.6.7.

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000007620
Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   com.apple.JavaScriptCore          0x00000001007a1efc WTF::fastFree(void*) + 140 (TCPageMap.h:233)
1   com.apple.WebCore                 0x00000001015793f9 WebCore::timerFired(__CFRunLoopTimer*, void*) + 57 (SharedTimerMac.mm:167)
2   com.apple.CoreFoundation          0x00007fff88a1dbe8 __CFRunLoopRun + 6488
3   com.apple.CoreFoundation          0x00007fff88a1bdbf CFRunLoopRunSpecific + 575
4   com.apple.HIToolbox               0x00007fff825397ee RunCurrentEventLoopInMode + 333
5   com.apple.HIToolbox               0x00007fff825395f3 ReceiveNextEventCommon + 310
6   com.apple.HIToolbox               0x00007fff825394ac BlockUntilNextEventMatchingListInMode + 59
7   com.apple.AppKit                  0x00007fff84cc2e64 _DPSNextEvent + 718
8   com.apple.AppKit                  0x00007fff84cc27a9 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 155
9   com.apple.Safari                  0x000000010001605a 0x100000000 + 90202
10  com.apple.AppKit                  0x00007fff84c8848b -[NSApplication run] + 395
11  com.apple.AppKit                  0x00007fff84c811a8 NSApplicationMain + 364
12  com.apple.Safari                  0x0000000100009f7c 0x100000000 + 40828

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