[Webkit-unassigned] [Bug 180510] New: ASSERTION FAILED: m_sourceSampleRate == sampleRate()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=180510

            Bug ID: 180510
           Summary: ASSERTION FAILED: m_sourceSampleRate == sampleRate()
           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: jlewis3 at apple.com
                CC: cdumez at apple.com, webkit-bug-importer at group.apple.com

Created attachment 328644

  --> https://bugs.webkit.org/attachment.cgi?id=328644&action=review

Crash Log

The test webaudio/silent-audio-interrupted-in-background.html has crashed with an assertion several times on Sierra Debug WK1:
https://build.webkit.org/results/Apple%20Sierra%20Debug%20WK1%20(Tests)/r225592%20(5152)/results.html
https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=webaudio%2Fsilent-audio-interrupted-in-background.html

stderr:

ASSERTION FAILED: m_sourceSampleRate == sampleRate()
/Volumes/Data/slave/sierra-debug/build/Source/WebCore/Modules/webaudio/MediaElementAudioSourceNode.cpp(128) : virtual void WebCore::MediaElementAudioSourceNode::process(size_t)
1   0x10c2bd66d WTFCrash
2   0x115dc6ba8 WebCore::MediaElementAudioSourceNode::process(unsigned long)
3   0x115dacb3a WebCore::AudioNode::processIfNecessary(unsigned long)
4   0x115daf2b9 WebCore::AudioNodeOutput::pull(WebCore::AudioBus*, unsigned long)
5   0x115dad133 WebCore::AudioNodeInput::pull(WebCore::AudioBus*, unsigned long)
6   0x115dad062 WebCore::AudioNode::pullInputs(unsigned long)
7   0x115daca8c WebCore::AudioNode::processIfNecessary(unsigned long)
8   0x115daf2b9 WebCore::AudioNodeOutput::pull(WebCore::AudioBus*, unsigned long)
9   0x115daf0bb WebCore::AudioNodeInput::sumAllConnections(WebCore::AudioBus*, unsigned long)
10  0x115dad185 WebCore::AudioNodeInput::pull(WebCore::AudioBus*, unsigned long)
11  0x115d95b7a WebCore::AudioDestinationNode::render(WebCore::AudioBus*, WebCore::AudioBus*, unsigned long)
12  0x115d95d5f non-virtual thunk to WebCore::AudioDestinationNode::render(WebCore::AudioBus*, WebCore::AudioBus*, unsigned long)
13  0x116eb18ca WebCore::AudioDestinationMac::render(unsigned int, AudioBufferList*)
14  0x116eb1717 WebCore::AudioDestinationMac::inputProc(void*, unsigned int*, AudioTimeStamp const*, unsigned int, unsigned int, AudioBufferList*)
15  0x138a0cef5 AUInputElement::PullInput(unsigned int&, AudioTimeStamp const&, unsigned int, unsigned int)
16  0x1389038a8 AUInputFormatConverter2::InputProc(OpaqueAudioConverter*, unsigned int*, AudioBufferList*, AudioStreamPacketDescription**, void*)
17  0x7fffa44d343b AudioConverterChain::CallInputProc(unsigned int)
18  0x7fffa44d3198 AudioConverterChain::FillBufferFromInputProc(unsigned int*, CABufferList*)
19  0x7fffa44d30fc BufferedAudioConverter::GetInputBytes(unsigned int, unsigned int&, CABufferList const*&)
20  0x7fffa44d2fc0 CBRConverter::RenderOutput(CABufferList*, unsigned int, unsigned int&, AudioStreamPacketDescription*)
21  0x7fffa44c65fd BufferedAudioConverter::FillBuffer(unsigned int&, AudioBufferList&, AudioStreamPacketDescription*)
22  0x7fffa44c68c1 AudioConverterChain::RenderOutput(CABufferList*, unsigned int, unsigned int&, AudioStreamPacketDescription*)
23  0x7fffa44c65fd BufferedAudioConverter::FillBuffer(unsigned int&, AudioBufferList&, AudioStreamPacketDescription*)
24  0x7fffa44c60ce AudioConverterFillComplexBuffer
25  0x13890335f AUInputFormatConverter2::PullAndConvertInput(AudioTimeStamp const&, unsigned int&, AudioBufferList&, AudioStreamPacketDescription*, bool&)
26  0x1389031a8 AUConverterBase::RenderBus(unsigned int&, AudioTimeStamp const&, unsigned int, unsigned int)
27  0x138a10084 AUBase::DoRenderBus(unsigned int&, AudioTimeStamp const&, unsigned int, AUOutputElement*, unsigned int, AudioBufferList&)
28  0x138a0fd84 AUBase::DoRender(unsigned int&, AudioTimeStamp const&, unsigned int, unsigned int, AudioBufferList&)
29  0x1389062de AUHAL::AUIOProc(unsigned int, AudioTimeStamp const*, AudioBufferList const*, AudioTimeStamp const*, AudioBufferList*, AudioTimeStamp const*, void*)
30  0x7fffa52338ce HALC_ProxyIOContext::IOWorkLoop()
31  0x7fffa5232264 HALC_ProxyIOContext::IOThreadEntry(void*)


The first crash happened with this build:
https://build.webkit.org/builders/Apple%20Sierra%20Debug%20WK1%20(Tests)/builds/4780

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