1742254 - Intermittent gfx/layers/apz/test/reftest/subframe-scrollbar-zoomed-out-async-scroll.html == gfx/layers/apz/test/reftest/subframe-scrollbar-zoomed-out-async-scroll-ref.html | image comparison, max difference: 39, number of differing pixels: 1

Status: RESOLVED FIXED

(Core :: Panning and Zooming, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: nbeleuzu [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=358718134&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/bG-D0LxoQMWsod-ouwXzeg/runs/0/artifacts/public/logs/live_backing.log
Reftest URL: https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/bG-D0LxoQMWsod-ouwXzeg/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

---

[task 2021-11-20T17:35:23.248Z] 17:35:23     INFO -  REFTEST TEST-START | gfx/layers/apz/test/reftest/subframe-scrollbar-zoomed-out-async-scroll.html == gfx/layers/apz/test/reftest/subframe-scrollbar-zoomed-out-async-scroll-ref.html
[task 2021-11-20T17:35:23.248Z] 17:35:23     INFO -  REFTEST INFO | RESTORE PREFERENCE pref(apz.allow_zooming,false)
[task 2021-11-20T17:35:23.249Z] 17:35:23     INFO -  REFTEST INFO | SET PREFERENCE pref(apz.allow_zooming,true)
[task 2021-11-20T17:35:23.249Z] 17:35:23     INFO -  REFTEST INFO | SET PREFERENCE pref(apz.allow_zooming_out,true)
[task 2021-11-20T17:35:23.249Z] 17:35:23     INFO -  REFTEST TEST-LOAD | http://10.0.2.2:8854/tests/gfx/layers/apz/test/reftest/subframe-scrollbar-zoomed-out-async-scroll.html | 4374 / 4473 (97%)
[task 2021-11-20T17:35:23.249Z] 17:35:23     INFO -  REFTEST INFO | RESTORE PREFERENCE pref(apz.allow_zooming_out,false)
[task 2021-11-20T17:35:23.249Z] 17:35:23     INFO -  REFTEST INFO | RESTORE PREFERENCE pref(apz.allow_zooming,false)
[task 2021-11-20T17:35:23.249Z] 17:35:23     INFO -  REFTEST INFO | SET PREFERENCE pref(apz.allow_zooming,true)
[task 2021-11-20T17:35:23.249Z] 17:35:23     INFO -  REFTEST INFO | SET PREFERENCE pref(apz.allow_zooming_out,true)
[task 2021-11-20T17:35:23.249Z] 17:35:23     INFO -  REFTEST TEST-LOAD | http://10.0.2.2:8854/tests/gfx/layers/apz/test/reftest/subframe-scrollbar-zoomed-out-async-scroll-ref.html | 4374 / 4473 (97%)
[task 2021-11-20T17:35:23.250Z] 17:35:23     INFO -  REFTEST INFO | REFTEST fuzzy test (0, 0) <= (39, 1) <= (28, 23)
[task 2021-11-20T17:35:23.250Z] 17:35:23  WARNING -  REFTEST TEST-UNEXPECTED-FAIL | gfx/layers/apz/test/reftest/subframe-scrollbar-zoomed-out-async-scroll.html == gfx/layers/apz/test/reftest/subframe-scrollbar-zoomed-out-async-scroll-ref.html | image comparison, max difference: 39, number of differing pixels: 1
[task 2021-11-20T17:35:23.265Z] 17:35:23     INFO -  REFTEST   IMAGE 1 (TEST): data:image/png;base64,
[task 2021-11-20T17:35:23.276Z] 17:35:23     INFO -  REFTEST   IMAGE 2 (REFERENCE): data:image/png;base64,
[task 2021-11-20T17:35:23.277Z] 17:35:23     INFO -  REFTEST TEST-END | gfx/layers/apz/test/reftest/subframe-scrollbar-zoomed-out-async-scroll.html == gfx/layers/apz/test/reftest/subframe-scrollbar-zoomed-out-async-scroll-ref.html

Comment 1

[Intermittent Failures Robot]

4 failures in 3259 pushes (0.001 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 2
• mozilla-central: 2

Platform and build breakdown:

• android-em-7-0-x86_64-lite-qr: 3
  • debug: 3
• android-em-7-0-x86_64-shippable-lite-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1742254&startday=2021-11-15&endday=2021-11-21&tree=all

Comment 2

[Botond Ballo [:botond]]

The rendering of this testcase on Android is such that the scrollbars are barely 3 pixels long, which is not very useful. I tweaked the scroll frame dimensions to make them bigger, and with that a bit of fuzz adjustment, test seems to be passing reliably: https://treeherder.mozilla.org/jobs?repo=try&revision=cef147188231442326e8693c1809f8d801183804

Comment 3

[Botond Ballo [:botond]]

Attachment: Bug 1742254 - Decrease the size of the scrollable rect of the subframe in subframe-scrollbar-zoomed-out-async-scroll.html. r=tnikkel

On Android, there is no lower bound on the length of the scroll thumb,
and the dimensions of the subframe in this test were such that the
thumb was barely a speck on the screen, making the test not very useful.

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/c32f29e1e654
Decrease the size of the scrollable rect of the subframe in subframe-scrollbar-zoomed-out-async-scroll.html. r=tnikkel

Comment 5

[Noemi Erli[:noemi_erli]]

https://hg.mozilla.org/mozilla-central/rev/c32f29e1e654

Comment 6

[Intermittent Failures Robot]

6 failures in 2819 pushes (0.002 failures/push) were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 5
• mozilla-central: 1

Platform and build breakdown:

• android-em-7-0-x86_64-lite-qr: 5
  • debug: 5
• android-em-7-0-x86_64-qr: 1
  • opt: 1

For more details, see:
https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1742254&startday=2021-11-22&endday=2021-11-28&tree=all