WebCore WTFCrashWithInfo(int, char const*, char const*, int) + 20 1 WebCore WebCore::RenderTreeBuilder::RenderTreeBuilder(WebCore::RenderView&) + 358 2 WebCore WebCore::RenderTreeUpdater::tearDownRenderers(WebCore::Element&) + 44 3 WebCore WebCore::ContainerNode::removeBetween(WebCore::Node*, WebCore::Node*, WebCore::Node&) + 140 4 WebCore WebCore::ContainerNode::removeChild(WebCore::Node&) + 644 5 WebCore WebCore::VTTCue::removeDisplayTree() + 136 6 WebCore WebCore::HTMLMediaElement::updateActiveTextTrackCues(WTF::MediaTime const&) + 5828 7 WebCore WTF::Function<void ()>::CallableWrapper<WebCore::HTMLMediaElement::updateActiveTextTrackCues(WTF::MediaTime const&)::$_22>::call() + 172 8 AVFoundation __67-[AVOccasionalTimebaseObserver initWithTimebase:times:queue:block:]_block_invoke_4 + 68 the stack of function calls, the iOS system is iOS 12.2, and the webkit version is 607.1.40 i think.
Thank you for the report! Is this at least semi-reproducible, or a one off? For Apple folks: crash point matches rdar://problem/36153631&47826223&47826975&40373156&39302087, but those issues look different.
(In reply to Alexey Proskuryakov from comment #1) > Thank you for the report! Is this at least semi-reproducible, or a one off? > > For Apple folks: crash point matches > rdar://problem/36153631&47826223&47826975&40373156&39302087, but those > issues look different. it's a reproducible bug, only iOS 12. github issue:https://github.com/youtube/youtube-ios-player-helper/issues/322
I cannot reproduce the crash with iOS 12.2.
<rdar://problem/50862123>