212537 2020-05-29 11:30:00 -0700 ASSERTION FAILURE (r220931): !m_function in ~CompletionHandler() after switch tabs 2020-06-01 09:30:58 -0700 1 1 1 Unclassified WebKit WebKit Misc. WebKit Local Build iPhone / iPad iOS 13 RESOLVED FIXED InRadar, Regression P2 Normal --- 175721 1 dbates cdumez achristensen beidson cdumez ggaren webkit-bug-importer oldest_to_newest 1657363 0 dbates 2020-05-29 11:30:00 -0700 Seen on iOS when switching tabs. Backtrace looks like: #0 0x000000013000120e in ::WTFCrash() #1 0x00000001010df977 in WTF::CompletionHandler<void ()>::~CompletionHandler() #2 0x00000001010dd155 in WTF::CompletionHandler<void ()>::~CompletionHandler() #3 0x00000001022f60ee in WebKit::WebProcess::prepareToSuspend(bool, WTF::CompletionHandler<void ()>&&)::$_8::~$_8() #4 0x00000001022e7495 in WebKit::WebProcess::prepareToSuspend(bool, WTF::CompletionHandler<void ()>&&)::$_8::~$_8() #5 0x0000000102314c95 in WTF::Detail::CallableWrapper<WebKit::WebProcess::prepareToSuspend(bool, WTF::CompletionHandler<void ()>&&)::$_8, void, bool>::~CallableWrapper() #6 0x0000000102314b95 in WTF::Detail::CallableWrapper<WebKit::WebProcess::prepareToSuspend(bool, WTF::CompletionHandler<void ()>&&)::$_8, void, bool>::~CallableWrapper() #7 0x0000000102314bbc in WTF::Detail::CallableWrapper<WebKit::WebProcess::prepareToSuspend(bool, WTF::CompletionHandler<void ()>&&)::$_8, void, bool>::~CallableWrapper() #8 0x000000010113e06f in std::__1::default_delete<WTF::Detail::CallableWrapperBase<void, bool> >::operator()(WTF::Detail::CallableWrapperBase<void, bool>*) #9 0x000000010113dfef in std::__1::unique_ptr<WTF::Detail::CallableWrapperBase<void, bool>, std::__1::default_delete<WTF::Detail::CallableWrapperBase<void, bool> > >::reset(WTF::Detail::CallableWrapperBase<void, bool>*) #10 0x000000010113df89 in std::__1::unique_ptr<WTF::Detail::CallableWrapperBase<void, bool>, std::__1::default_delete<WTF::Detail::CallableWrapperBase<void, bool> > >::~unique_ptr() #11 0x000000010113df65 in std::__1::unique_ptr<WTF::Detail::CallableWrapperBase<void, bool>, std::__1::default_delete<WTF::Detail::CallableWrapperBase<void, bool> > >::~unique_ptr() #12 0x000000010113df45 in WTF::Function<void (bool)>::~Function() #13 0x000000010113dec5 in WTF::Function<void (bool)>::~Function() #14 0x00000001022f6c7e in WebKit::WebProcess::markAllLayersVolatile(WTF::Function<void (bool)>&&)::$_2::~$_2() #15 0x00000001022e7585 in WebKit::WebProcess::markAllLayersVolatile(WTF::Function<void (bool)>&&)::$_2::~$_2() ... 1657364 1 webkit-bug-importer 2020-05-29 11:30:14 -0700 <rdar://problem/63766838> 1657378 2 dbates 2020-05-29 12:19:08 -0700 Steps to repro: 1. Open one tab to apple.com 2. Create a new tab showing favorites view 3. Switch to apple.com 1657379 3 cdumez 2020-05-29 12:21:14 -0700 I suspect the issue could be related to WebProcess::cancelMarkAllLayersVolatile(), which I believe gets called when cancelling suspension. cancelMarkAllLayersVolatile() destroys m_pageMarkingLayersAsVolatileCounter which may not have called its CompletionHandler yet. 1657386 4 cdumez 2020-05-29 12:50:51 -0700 (In reply to Chris Dumez from comment #3) > I suspect the issue could be related to > WebProcess::cancelMarkAllLayersVolatile(), which I believe gets called when > cancelling suspension. cancelMarkAllLayersVolatile() destroys > m_pageMarkingLayersAsVolatileCounter which may not have called its > CompletionHandler yet. Yes, this is what I see: Thread 0 name: Dispatch queue: com.apple.main-thread Thread 0 Crashed: 0 WebKit 0x0000000101014b20 WTFCrashWithInfo(int, char const*, char const*, int) + 20 1 WebKit 0x00000001014930c4 WTF::Detail::CallableWrapper<WebKit::WebProcess::markAllLayersVolatile(WTF::CompletionHandler<void (bool)>&&)::$_2, void, WTF::RefCounterEvent>::call(WTF::RefCounterEvent) + 0 2 WebKit 0x0000000101493560 std::__1::unique_ptr<WTF::RefCounter<WebKit::WebProcess::PageMarkingLayersAsVolatileCounterType>, std::__1::default_delete<WTF::RefCounter<WebKit::WebProcess::PageMarkingLayersAsVolatileCounterType> > >::reset(WTF::RefCounter<WebKit::WebProcess::PageMarkingLayersAsVolatileCounterType>*) + 76 3 WebKit 0x000000010148edfc WebKit::WebProcess::cancelMarkAllLayersVolatile() + 40 4 WebKit 0x000000010148f080 WebKit::WebProcess::processDidResume() + 192 5 WebKit 0x000000010102e4d0 IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >) + 204 6 WebKit 0x000000010102e780 IPC::Connection::dispatchOneIncomingMessage() + 232 7 JavaScriptCore 0x00000001039aa324 WTF::RunLoop::performWork() + 688 8 JavaScriptCore 0x00000001039aa4e0 WTF::RunLoop::performWork(void*) + 36 9 CoreFoundation 0x00000001b1c5bb04 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24 1657426 5 400616 cdumez 2020-05-29 14:21:10 -0700 Created attachment 400616 Patch 1657942 6 ews-feeder 2020-06-01 09:30:57 -0700 Committed r262380: <https://trac.webkit.org/changeset/262380> All reviewed patches have been landed. Closing bug and clearing flags on attachment 400616. 400616 2020-05-29 14:21:10 -0700 2020-06-01 09:30:58 -0700 Patch bug-212537-20200529142110.patch text/plain 15763 cdumez U3VidmVyc2lvbiBSZXZpc2lvbjogMjYyMzA4CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViS2l0L0No YW5nZUxvZyBiL1NvdXJjZS9XZWJLaXQvQ2hhbmdlTG9nCmluZGV4IDg3NGNjNTgzMjNkZDJlY2Q2 MzAzNTkwNGRjYjhmMzU0NjA5OGZjZTguLjgwNTQyZjg2N2U2MmY2MjYwYTE5YmQ3YjljOTMwNDhj NGU2MWE2NTAgMTAwNjQ0Ci0tLSBhL1NvdXJjZS9XZWJLaXQvQ2hhbmdlTG9nCisrKyBiL1NvdXJj ZS9XZWJLaXQvQ2hhbmdlTG9nCkBAIC0xLDMgKzEsMjcgQEAKKzIwMjAtMDUtMjkgIENocmlzIER1 bWV6ICA8Y2R1bWV6QGFwcGxlLmNvbT4KKworICAgICAgICBBU1NFUlRJT04gRkFJTFVSRSAocjIy MDkzMSk6ICFtX2Z1bmN0aW9uIGluIH5Db21wbGV0aW9uSGFuZGxlcigpIGFmdGVyIHN3aXRjaCB0 YWJzCisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0yMTI1 MzcKKyAgICAgICAgPHJkYXI6Ly9wcm9ibGVtLzYzNzY2ODM4PgorCisgICAgICAgIFJldmlld2Vk IGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgIFdoZW4gV2ViUGFnZTo6bWFya0FsbExheWVy 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