Bug 307377 – [Tahoe Release arm64] compositing/webgl/update-composited-canvas-layer.html is a flaky image diff

• Status: NEW
• Component: WebGL

[Diego De La Toba]

compositing/webgl/update-composited-canvas-layer.html is a flaky image diff on macOS Tahoe arm64.


HISTORY:
https://results.webkit.org/?suite=layout-tests&test=compositing%2Fwebgl%2Fupdate-composited-canvas-layer.html&version_name=Tahoe&style=release&architecture=arm64&recent=false


IMAGE URL:
https://build.webkit.org/results/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/307099%40main%20(1543)/compositing/webgl/update-composited-canvas-layer-diffs.html


IMAGES:
See attached. 


REPRODUCTION:
I was able to reproduce this on macOS Tahoe ToT with the following:

rwt --force --release --no-retry —exit-after-n-failures=5 --iterations 2000 compositing/webgl/update-composited-canvas-layer.html
reproduce it

I am going to mark expectations as ImageOnlyFailure Pass while this pends investigation

[Radar WebKit Bug Importer]

<rdar://problem/170007050>

[Diego De La Toba]

Pull request: https://github.com/WebKit/WebKit/pull/58248

[Diego De La Toba]

Pull request: https://github.com/WebKit/WebKit/pull/58257

[EWS]

Test gardening commit 307126@main (df15754afb74): <https://commits.webkit.org/307126@main>

Reviewed commits have been landed. Closing PR #58257 and removing active labels.

[Diego De La Toba]

Created attachment 478296 [details]
image diff

[Jonathan Bedard]

Looks like this test might actually crash ImageDiff:

10:21:04.791 31158 worker/8 Test marked as failed, ImageDiff crashed because of no data while reading stdout for the server process.
10:21:04.791 31158 worker/8 Test marked as failed, ImageDiff crashed because of no data while reading stdout for the server process.
10:21:04.791 31158 worker/8   compositing/webgl/update-composited-canvas-layer.html : ImageDiff produced stderr output:
Error: test and reference images have different sizes. Test image is 784x588, reference image is 800x600
ImageDiff crashed
10:21:04.794 31158 worker/8 compositing/webgl/update-composited-canvas-layer.html failed: