Bug 261314

Summary:	REGRESSION(266896@main): [ Debug wk2 ] fast/mediastream/captureStream/canvas3d.html is a flaky failure
Product:	WebKit	Reporter:	Ben Schwartz <ben_schwartz>
Component:	Media	Assignee:	Ryosuke Niwa <rniwa>
Status:	REOPENED ---
Severity:	Normal	CC:	rniwa, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
See Also:	https://bugs.webkit.org/show_bug.cgi?id=260112

Description Ben Schwartz 2023-09-07 21:50:13 PDT

fast/mediastream/captureStream/canvas3d.html

This test is a constant failure on debug builds of wk2 (both macOS and iOS).

HISTORY:

https://results.webkit.org/?suite=layout-tests&test=fast%2Fmediastream%2FcaptureStream%2Fcanvas3d.html&style=debug

TEXT DIFF:

 PASS captureStream with 3d context drawing - not buffered initially
-PASS captureStream with 3d context drawing - buffered initially
+FAIL captureStream with 3d context drawing - buffered initially assert_true: expecting value 1 to be part of a green pixel expected true got false
 
DIFF URL:

https://build.webkit.org/results/Apple-Ventura-Debug-WK2-GPUProcess-Tests/266898@main%20(3329)/fast/mediastream/captureStream/canvas3d-pretty-diff.html

REPRODUCIBILITY:

I was able to reproduce this issue on macOS Ventura (13.5, 22G74/arm64) ToT using the following command:

run-webkit-tests --debug --verbose --clobber-old-results fast/mediastream/captureStream/canvas3d.html

REGRESSION:

I was able to bisect a regression point at 266896@main, as the issue did not reproduce at 266895@main or before.

Comment 1 Radar WebKit Bug Importer 2023-09-07 21:50:21 PDT

<rdar://problem/115153883>

Comment 2 EWS 2023-09-07 22:07:25 PDT

Test gardening commit 267767@main (71e3d0d9fc22): <https://commits.webkit.org/267767@main>

Reviewed commits have been landed. Closing PR #17574 and removing active labels.

Comment 3 Ryosuke Niwa 2023-09-25 10:26:37 PDT

Pull request: https://github.com/WebKit/WebKit/pull/18175

Comment 4 EWS 2023-09-25 16:18:36 PDT

Committed 268416@main (777397b2e4c0): <https://commits.webkit.org/268416@main>

Reviewed commits have been landed. Closing PR #18175 and removing active labels.

Comment 5 Ryosuke Niwa 2023-09-28 08:00:47 PDT

Hm... the test is still flaky.

Comment 6 Ryosuke Niwa 2023-09-28 08:32:18 PDT

Re-opening for pull request https://github.com/WebKit/WebKit/pull/18354

Comment 7 EWS 2023-09-28 08:37:02 PDT

Test gardening commit 268589@main (8ca8f70a8ec4): <https://commits.webkit.org/268589@main>

Reviewed commits have been landed. Closing PR #18354 and removing active labels.