Bug 94494 – Assertion failure running audioparam-connect-audioratesignal.html and audioparam-summingjunction.html

• Status: RESOLVED
• Resolution: FIXED
• Component: Web Audio

[Kenneth Russell]

The following assertion failure is being seen on Windows and Linux debug builds on the Chromium WebKit bots:

crash log for DumpRenderTree (pid 27048):
STDOUT: <empty>
STDERR: ASSERTION FAILED: m_events.size()
STDERR: third_party/WebKit/Source/WebCore/Modules/webaudio/AudioParamTimeline.cpp(173) : float WebCore::AudioParamTimeline::valuesForTimeRangeImpl(float, float, float, float*, unsigned int, float, float)
STDERR: 1   0x7f913fcd390a
STDERR: 2   0x7f913fcd3808
STDERR: 3   0x7f913fcd2e13
STDERR: 4   0x7f913fcd2bda
STDERR: 5   0x7f913fcd2b01
STDERR: 6   0x7f913fcc7dcd
STDERR: 7   0x7f913fcc8ca2
STDERR: 8   0x7f913fccc2e9
STDERR: 9   0x7f913fccb7f0
STDERR: 10  0x7f913fcc74ee
STDERR: 11  0x7f913fce1ff1
STDERR: 12  0x7f913fce1d3c
STDERR: 13  0x7f913f7276c1
STDERR: 14  0x7f913f727d25
STDERR: 15  0x7f91363dc9ca
STDERR: 16  0x7f9136139cdd clone
STDERR: [27048:27953:12945653492993:ERROR:process_util_posix.cc(143)] Received signal 11
STDERR: 	base::debug::StackTrace::StackTrace() [0x7f913c394ea6]
STDERR: 	base::(anonymous namespace)::StackDumpSignalHandler() [0x7f913c3fbffd]
STDERR: 	0x7f9136086af0
STDERR: 	WebCore::AudioParamTimeline::valuesForTimeRangeImpl() [0x7f913fcd3914]
STDERR: 	WebCore::AudioParamTimeline::valuesForTimeRange() [0x7f913fcd3808]
STDERR: 	WebCore::AudioParam::calculateTimelineValues() [0x7f913fcd2e13]
STDERR: 	WebCore::AudioParam::calculateFinalValues() [0x7f913fcd2bda]
STDERR: 	WebCore::AudioParam::calculateSampleAccurateValues() [0x7f913fcd2b01]
STDERR: 	WebCore::AudioGainNode::process() [0x7f913fcc7dcd]
STDERR: 	WebCore::AudioNode::processIfNecessary() [0x7f913fcc8ca2]
STDERR: 	WebCore::AudioNodeOutput::pull() [0x7f913fccc2e9]
STDERR: 	WebCore::AudioNodeInput::pull() [0x7f913fccb7f0]
STDERR: 	WebCore::AudioDestinationNode::render() [0x7f913fcc74ee]
STDERR: 	WebCore::OfflineAudioDestinationNode::offlineRender() [0x7f913fce1ff1]
STDERR: 	WebCore::OfflineAudioDestinationNode::offlineRenderEntry() [0x7f913fce1d3c]
STDERR: 	WTF::threadEntryPoint() [0x7f913f7276c1]
STDERR: 	WTF::wtfThreadEntryPoint() [0x7f913f727d25]
STDERR: 	start_thread [0x7f91363dc9ca]
STDERR: 	0x7f9136139cdd

See:

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#showExpectations=true&tests=webaudio%2Faudioparam-connect-audioratesignal.html%2Cwebaudio%2Faudioparam-summingjunction.html

I'm going to mark this failure in TestExpectations for the moment.

[Kenneth Russell]

Actually, the flakiness dashboard points to http://trac.webkit.org/changeset/125957/ as the cause. Reassigning to Chris.

[Kenneth Russell]

Committed r126049: <http://trac.webkit.org/changeset/126049>

[Chris Rogers]

Fixed ASSERT:
http://trac.webkit.org/changeset/126065

Updated TestExpectations:
http://trac.webkit.org/changeset/126092