[Webkit-unassigned] [Bug 155584] DataURLDecoder::DecodingResultDispatcher may get deleted outside main thread

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=155584

Alexey Proskuryakov <ap at webkit.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ap at webkit.org,
                   |                            |ryanhaddad at apple.com

--- Comment #5 from Alexey Proskuryakov <ap at webkit.org> ---
I just noticed a crash that I haven't seen before, is it a result of this change?

https://build.webkit.org/results/Apple%20El%20Capitan%20Debug%20WK2%20(Tests)/r198358%20(3811)/plugins/return-negative-one-from-write-crash-log.txt

Thread 22 Crashed:: Dispatch queue: org.webkit.DataURLDecoder
0   com.apple.JavaScriptCore          0x0000000106edd1e7 WTFCrash + 39 (Assertions.cpp:322)
1   com.apple.JavaScriptCore          0x0000000106f2d0ea WTF::HashTableConstIterator<WTF::RefPtr<WTF::SchedulePair>, WTF::RefPtr<WTF::SchedulePair>, WTF::IdentityExtractor, WTF::SchedulePairHash, WTF::HashTraits<WTF::RefPtr<WTF::SchedulePair> >, WTF::HashTraits<WTF::RefPtr<WTF::SchedulePair> > >::checkValidity() const + 74 (HashTable.h:213)
2   com.apple.JavaScriptCore          0x0000000106f2d039 WTF::HashTableConstIterator<WTF::RefPtr<WTF::SchedulePair>, WTF::RefPtr<WTF::SchedulePair>, WTF::IdentityExtractor, WTF::SchedulePairHash, WTF::HashTraits<WTF::RefPtr<WTF::SchedulePair> >, WTF::HashTraits<WTF::RefPtr<WTF::SchedulePair> > >::operator++() + 25 (HashTable.h:181)
3   com.apple.JavaScriptCore          0x0000000106f2c445 WTF::HashTableConstIteratorAdapter<WTF::HashTable<WTF::RefPtr<WTF::SchedulePair>, WTF::RefPtr<WTF::SchedulePair>, WTF::IdentityExtractor, WTF::SchedulePairHash, WTF::HashTraits<WTF::RefPtr<WTF::SchedulePair> >, WTF::HashTraits<WTF::RefPtr<WTF::SchedulePair> > >, WTF::RefPtr<WTF::SchedulePair> >::operator++() + 37 (HashTable.h:1437)
4   com.apple.JavaScriptCore          0x0000000106f2c1dc WTF::RunLoopTimerBase::schedule(WTF::HashSet<WTF::RefPtr<WTF::SchedulePair>, WTF::SchedulePairHash, WTF::HashTraits<WTF::RefPtr<WTF::SchedulePair> > > const&) + 156 (RunLoopTimerCF.cpp:73)
5   com.apple.WebCore                 0x0000000109641703 WebCore::DataURLDecoder::DecodingResultDispatcher::startTimer() + 99 (DataURLDecoder.cpp:79)
6   com.apple.WebCore                 0x0000000109640687 WebCore::DataURLDecoder::DecodingResultDispatcher::dispatch(std::__1::unique_ptr<WebCore::DataURLDecoder::DecodeTask, std::__1::default_delete<WebCore::DataURLDecoder::DecodeTask> >) + 631 (DataURLDecoder.cpp:66)
7   com.apple.WebCore                 0x000000010963dc13 WebCore::DataURLDecoder::decode(WebCore::URL const&, WebCore::DataURLDecoder::ScheduleContext const&, std::__1::function<void (WTF::Optional<WebCore::DataURLDecoder::Result>)>)::$_0::operator()() const + 291 (DataURLDecoder.cpp:178)
8   com.apple.WebCore                 0x000000010963dadd void std::__1::__invoke_void_return_wrapper<void>::__call<WebCore::DataURLDecoder::decode(WebCore::URL const&, WebCore::DataURLDecoder::ScheduleContext const&, std::__1::function<void (WTF::Optional<WebCore::DataURLDecoder::Result>)>)::$_0&>(WebCore::DataURLDecoder::decode(WebCore::URL const&, WebCore::DataURLDecoder::ScheduleContext const&, std::__1::function<void (WTF::Optional<WebCore::DataURLDecoder::Result>)>)::$_0&&&) + 45 (__functional_base:441)
9   com.apple.WebCore                 0x000000010963da7c std::__1::__function::__func<WebCore::DataURLDecoder::decode(WebCore::URL const&, WebCore::DataURLDecoder::ScheduleContext const&, std::__1::function<void (WTF::Optional<WebCore::DataURLDecoder::Result>)>)::$_0, std::__1::allocator<WebCore::DataURLDecoder::decode(WebCore::URL const&, WebCore::DataURLDecoder::ScheduleContext const&, std::__1::function<void (WTF::Optional<WebCore::DataURLDecoder::Result>)>)::$_0>, void ()>::operator()() + 44 (functional:1407)
10  com.apple.JavaScriptCore          0x00000001067e4f2a std::__1::function<void ()>::operator()() const + 26 (functional:1793)
11  com.apple.JavaScriptCore          0x0000000106f50309 ___ZN3WTF9WorkQueue8dispatchENSt3__18functionIFvvEEE_block_invoke + 41 (WorkQueueCocoa.cpp:36)
12  libdispatch.dylib                 0x00007fff93318871 _dispatch_call_block_and_release + 12

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