Bug 170823 – [ios-simulator] LayoutTest webrtc/multi-video.html is a flaky crash

• Status: RESOLVED
• Resolution: FIXED
• Component: New Bugs

[Ryan Haddad]

LayoutTest webrtc/multi-video.html is a flaky crash

https://build.webkit.org/results/Apple%20iOS%2010%20Simulator%20Debug%20WK2%20(Tests)/r215323%20(599)/results.html

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=webrtc%2Fmulti-video.html

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.WebKit              	0x000000010e737f37 WTF::HashTableIterator<unsigned long long, WTF::KeyValuePair<unsigned long long, std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<unsigned long long, std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> > > >, WTF::IntHash<unsigned long long>, WTF::HashMap<unsigned long long, std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> >, WTF::IntHash<unsigned long long>, WTF::HashTraits<unsigned long long>, WTF::HashTraits<std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> > > >::KeyValuePairTraits, WTF::HashTraits<unsigned long long> > WTF::HashTable<unsigned long long, WTF::KeyValuePair<unsigned long long, std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<unsigned long long, std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> > > >, WTF::IntHash<unsigned long long>, WTF::HashMap<unsigned long long, std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> >, WTF::IntHash<unsigned long long>, WTF::HashTraits<unsigned long long>, WTF::HashTraits<std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> > > >::KeyValuePairTraits, WTF::HashTraits<unsigned long long> >::find<WTF::IdentityHashTranslator<WTF::HashMap<unsigned long long, std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> >, WTF::IntHash<unsigned long long>, WTF::HashTraits<unsigned long long>, WTF::HashTraits<std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> > > >::KeyValuePairTraits, WTF::IntHash<unsigned long long> >, unsigned long long>(unsigned long long const&) + 23 (HashTable.h:1007)
1   com.apple.WebKit              	0x000000010e737f14 WTF::HashTable<unsigned long long, WTF::KeyValuePair<unsigned long long, std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> > >, WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<unsigned long long, std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> > > >, WTF::IntHash<unsigned long long>, WTF::HashMap<unsigned long long, std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> >, WTF::IntHash<unsigned long long>, WTF::HashTraits<unsigned long long>, WTF::HashTraits<std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> > > >::KeyValuePairTraits, WTF::HashTraits<unsigned long long> >::find(unsigned long long const&) + 36 (HashTable.h:395)
2   com.apple.WebKit              	0x000000010e737bdf WTF::HashMap<unsigned long long, std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> >, WTF::IntHash<unsigned long long>, WTF::HashTraits<unsigned long long>, WTF::HashTraits<std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> > > >::find(unsigned long long const&) + 47 (HashMap.h:264)
3   com.apple.WebKit              	0x000000010e72966e WTF::HashMap<unsigned long long, std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> >, WTF::IntHash<unsigned long long>, WTF::HashTraits<unsigned long long>, WTF::HashTraits<std::__1::unique_ptr<WebKit::NetworkRTCProvider::Resolver, std::__1::default_delete<WebKit::NetworkRTCProvider::Resolver> > > >::take(unsigned long long const&) + 110 (HashMap.h:441)
4   com.apple.WebKit              	0x000000010e7291a1 WebKit::NetworkRTCProvider::resolvedName(__CFHost*, CFHostInfoType, CFStreamError const*, void*) + 225 (NetworkRTCProvider.cpp:180)
5   com.apple.CFNetwork           	0x00000001127c7345 ClassicHostDelegate::hostInfoCallback(HostBase*, __CFString const*, __CFError*) + 155
6   com.apple.CFNetwork           	0x00000001127c6d99 HostBase::invokeCallback(__CFString const*) + 155
7   com.apple.CFNetwork           	0x00000001127c6c05 DispatchHost::processPending() + 129
8   com.apple.CoreFoundation      	0x0000000111ad8761 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
9   com.apple.CoreFoundation      	0x0000000111abd907 __CFRunLoopDoSources0 + 423
10  com.apple.CoreFoundation      	0x0000000111abce76 __CFRunLoopRun + 918
11  com.apple.CoreFoundation      	0x0000000111abc884 CFRunLoopRunSpecific + 420
12  com.apple.Foundation          	0x000000010deb5760 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 274
13  com.apple.Foundation          	0x000000010deb563b -[NSRunLoop(NSRunLoop) run] + 76
14  libxpc.dylib                  	0x000000011333d819 _xpc_objc_main + 400
15  libxpc.dylib                  	0x000000011333fb49 xpc_main + 189
16  com.apple.WebKit.Networking   	0x000000010de1be7c main + 892 (XPCServiceMain.mm:148)
17  libdyld.dylib                 	0x000000011307268d start + 1

[Radar WebKit Bug Importer]

<rdar://problem/31611583>

[Ryan Haddad]

This crash is affecting EWS results.

[Ryan Haddad]

Skipped test in http://trac.webkit.org/projects/webkit/changeset/215439

[youenn fablet]

Created attachment 307810 [details]
Patch

[Alexey Proskuryakov]

Youenn, why can the test be re-activated now?

[youenn fablet]

(In reply to Alexey Proskuryakov from comment #5)
> Youenn, why can the test be re-activated now?

The crash is probably the same as https://bugs.webkit.org/show_bug.cgi?id=170889

[WebKit Commit Bot]

Comment on attachment 307810 [details]
Patch

Clearing flags on attachment: 307810

Committed r215647: <http://trac.webkit.org/changeset/215647>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.