[Webkit-unassigned] [Bug 284853] New: REGRESSION(287869 at main?): [macOS Debug wk2] ASSERTION FAILED: WebCore::MediaRecorderPrivateEncoder::interleaveAndEnqueueNextFrame() in http/wpt/mediarecorder tests (flaky in EWS)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=284853

            Bug ID: 284853
           Summary: REGRESSION(287869 at main?): [macOS Debug wk2] ASSERTION
                    FAILED:
                    WebCore::MediaRecorderPrivateEncoder::interleaveAndEnq
                    ueueNextFrame() in http/wpt/mediarecorder tests (flaky
                    in EWS)
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: darbinyan at apple.com

The following tests are flaky crash on macOS Debug wk2 and also flaky instances in EWS. 

http/wpt/mediarecorder/MediaRecorder-video-bitrate.html
http/wpt/mediarecorder/pause-recording.html

The change 287869 at main looks suspicious based on the timeframe when the regression started. 

Error output:
stderr:
ASSERTION FAILED: frame->presentationTime() >= m_lastMuxedSampleStartTime
/Volumes/Data/worker/Apple-Sonoma-Debug-Build/build/Source/WebCore/platform/mediarecorder/MediaRecorderPrivateEncoder.cpp(838) : void WebCore::MediaRecorderPrivateEncoder::interleaveAndEnqueueNextFrame()
1   0x368e6cf98 WebCore::MediaRecorderPrivateEncoder::interleaveAndEnqueueNextFrame()
2   0x368e6e040 WebCore::MediaRecorderPrivateEncoder::flushToEndSegment(WTF::MediaTime const&)
3   0x368e84778 auto WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18::operator()<std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>>(std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>&&) const
4   0x368e846d0 decltype(std::declval<WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18>()(std::declval<std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>>())) std::__1::__invoke[abi:sn170006]<WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18, std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>>(WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18&&, std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>&&)
5   0x368e8469c std::__1::invoke_result<WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18, std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>>::type std::__1::invoke[abi:sn170006]<WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18, std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>>(WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18&&, std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>&&)
6   0x368e84668 auto WTF::NativePromise<void, void, 0u>::invokeWithVoidOrWithArg<WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18, std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>>(WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18&&, std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>&&)
7   0x368e84634 auto WTF::NativePromise<void, void, 0u>::whenSettled<WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18>(WTF::GuaranteedSerialFunctionDispatcher&, WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18&&, WTF::Logger::LogSiteIdentifier const&)::'lambda'(std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>&&)::operator()('lambda'(std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>&&))
8   0x368e84570 WTF::Detail::CallableWrapper<auto WTF::NativePromise<void, void, 0u>::whenSettled<WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18>(WTF::GuaranteedSerialFunctionDispatcher&, WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18&&, WTF::Logger::LogSiteIdentifier const&)::'lambda'(std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>&&), WTF::Ref<WTF::NativePromise<void, void, 0u>, WTF::RawPtrTraits<WTF::NativePromise<void, void, 0u>>, WTF::DefaultRefDerefTraits<WTF::NativePromise<void, void, 0u>>>, auto WTF::NativePromise<void, void, 0u>::whenSettled<WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18>(WTF::GuaranteedSerialFunctionDispatcher&, WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18&&, WTF::Logger::LogSiteIdentifier const&)::'lambda'(std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>&&)>::call(auto WTF::NativePromise<void, void, 0u>::whenSettled<WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18>(WTF::GuaranteedSerialFunctionDispatcher&, WebCore::MediaRecorderPrivateEncoder::flushPendingData(WTF::MediaTime const&)::$_18&&, WTF::Logger::LogSiteIdentifier const&)::'lambda'(std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>&&))
9   0x3688ec9f0 WTF::Function<WTF::Ref<WTF::NativePromise<void, void, 0u>, WTF::RawPtrTraits<WTF::NativePromise<void, void, 0u>>, WTF::DefaultRefDerefTraits<WTF::NativePromise<void, void, 0u>>> (std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>&&)>::operator()(std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>&&) const
10  0x3688ec380 WTF::NativePromise<void, void, 0u>::ThenCallback<true, WTF::NativePromise<void, void, 0u>>::processResult(WTF::NativePromise<void, void, 0u>&, std::experimental::fundamentals_v3::expected<void, WTF::detail::VoidPlaceholder>&&)
11  0x363018970 WTF::NativePromise<void, void, 0u>::ThenCallbackBase::dispatch(WTF::NativePromise<void, void, 0u>&, WTF::Locker<WTF::Lock, void>&)::'lambda'()::operator()()
12  0x363018410 WTF::Detail::CallableWrapper<WTF::NativePromise<void, void, 0u>::ThenCallbackBase::dispatch(WTF::NativePromise<void, void, 0u>&, WTF::Locker<WTF::Lock, void>&)::'lambda'(), void>::call()

History:
https://results.webkit.org/?suite=layout-tests&suite=layout-tests&test=http%2Fwpt%2Fmediarecorder%2FMediaRecorder-video-bitrate.html&test=http%2Fwpt%2Fmediarecorder%2Fpause-recording.html&platform=mac&style=debug

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