[Webkit-unassigned] [Bug 107798] New: Random crashes in WebCore::CachedResource::makePurgeable

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=107798

           Summary: Random crashes in
                    WebCore::CachedResource::makePurgeable
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: dieter at komendera.com


Created an attachment (id=184429)
 --> (https://bugs.webkit.org/attachment.cgi?id=184429&action=review)
crash report

Since about 10 days, the WebKit nightlies crash on me seemingly randomly. I can't tell the exact revision at which it started (Is the revision somewhere in the crash report?)
It seems it's not connected to a specific website or user action, I was just reading on a site, without doing anything at the time of the crash. Thus I can't reproduce the crash, but it was still happening with r140374 

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.WebCore                 0x0000000109c4aa1c WebCore::CachedResource::makePurgeable(bool) + 204
1   com.apple.WebCore                 0x0000000109c42872 WebCore::CachedCSSStyleSheet::destroyDecodedData() + 114
2   com.apple.WebCore                 0x000000010a8a00ff WebCore::ThreadTimers::sharedTimerFiredInternal() + 159
3   com.apple.WebCore                 0x000000010a728c93 WebCore::timerFired(__CFRunLoopTimer*, void*) + 51
4   com.apple.CoreFoundation          0x00007fff8c67bda4 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
5   com.apple.CoreFoundation          0x00007fff8c67b8bd __CFRunLoopDoTimer + 557
6   com.apple.CoreFoundation          0x00007fff8c661099 __CFRunLoopRun + 1513
7   com.apple.CoreFoundation          0x00007fff8c6606b2 CFRunLoopRunSpecific + 290
8   com.apple.HIToolbox               0x00007fff87cb10a4 RunCurrentEventLoopInMode + 209
9   com.apple.HIToolbox               0x00007fff87cb0e42 ReceiveNextEventCommon + 356
10  com.apple.HIToolbox               0x00007fff87cb0cd3 BlockUntilNextEventMatchingListInMode + 62
11  com.apple.AppKit                  0x00007fff89c6c613 _DPSNextEvent + 685

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