Bug 215392

Summary: [ macOS wk1 ] webaudio/oscillator-sawtooth.html is a flaky failure
Product: WebKit Reporter: Hector Lopez <hector_i_lopez>
Component: New BugsAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: cdumez, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Textual Diff
none
Expected audio
none
Actual audio none

Description Hector Lopez 2020-08-11 14:03:37 PDT 
webaudio/oscillator-sawtooth.html

Test is a flaky failure on macOS wk1. The first occurrence according to history is at r264962.

History:
https://results.webkit.org/?suite=layout-tests&test=webaudio%2Foscillator-sawtooth.html&limit=50000&platform=mac&flavor=wk1

Diff:
Total differing samples: 176335
Percentage of differing samples: 99.963%
Cumulative sample difference: 1520037270
Average sample difference: 8620.167692

Please see attachments
Comment 1 Hector Lopez 2020-08-11 14:04:22 PDT 
Created attachment 406416 [details]
Textual Diff
Comment 2 Hector Lopez 2020-08-11 14:05:10 PDT 
Created attachment 406417 [details]
Expected audio
Comment 3 Hector Lopez 2020-08-11 14:05:47 PDT 
Created attachment 406418 [details]
Actual audio
Comment 4 Hector Lopez 2020-08-11 14:12:08 PDT 
Test expectation while investigated:

https://trac.webkit.org/changeset/265516/webkit
Comment 5 Radar WebKit Bug Importer 2020-08-11 15:10:13 PDT 
<rdar://problem/66864936>
Comment 6 Chris Dumez 2020-08-12 11:44:16 PDT 
Potential regression from http://trac.webkit.org/r264941.
Comment 7 Chris Dumez 2020-08-13 13:12:10 PDT 
I am unable to reproduce currently. I have been looking at <http://trac.webkit.org/r264941> for a while now and have no idea how it could have changed the behavior here, especially in a way that is flaky...