1998260 - Intermittent /webdriver/tests/classic/perform_actions/pointer_mouse.py | test_down_closes_browsing_context[without up] | single tracking bug

Status: NEW

(Remote Protocol :: Marionette, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: hskupin [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=534338753&repo=try&task=OxdnouxKT4WTxSpIclqTWg.2
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/OxdnouxKT4WTxSpIclqTWg/runs/2/artifacts/public/logs/live_backing.log

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Comment 1

[Henrik Skupin [:whimboo][⌚️UTC+1]]

This will be a new test as added with my patches on bug 1848958. This is not going to work all the time when not sending async mouse events. It needs to be figured out if we want to support that rare situation or just ignore it in favor of seeing async events enabled at some point next year.

Comment 2

[Intermittent Failures Robot]

4 failures were associated with this bug in the last 7 days.

Repository breakdown:

• try: 4

Table

	nofis	nofis-noship
android-x86/opt		1
linux2404-x86_64/debug	1
linux2404-x86_64/opt	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1998260&startday=2025-11-03&endday=2025-11-09&tree=all

Comment 3

[Intermittent Failures Robot]

3 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 3

Table

	no_variant
android-x86_64/debug	3

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1998260&startday=2026-02-16&endday=2026-02-22&tree=all

Comment 4

[Intermittent Failures Robot]

16 failures were associated with this bug yesterday.

Repository breakdown:

• mozilla-beta: 16

Table

	headless	no_variant	nofis
android-x86_64/debug		1	1
linux2204-x86_64/debug	1	2
linux2404-x86_64/asan		1
linux2404-x86_64/debug	2	1
linux2404-x86_64/tsan	1	1
macosx1470-x86_64/debug	1	1
windows11-x86_64/debug	2	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1998260&startday=2026-02-24&endday=2026-02-24&tree=all

Comment 5

[Intermittent Failures Robot]

16 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-beta: 16

Table

	headless	no_variant	nofis
android-x86_64/debug		1	1
linux2204-x86_64/debug	1	2
linux2404-x86_64/asan		1
linux2404-x86_64/debug	2	1
linux2404-x86_64/tsan	1	1
macosx1470-x86_64/debug	1	1
windows11-x86_64/debug	2	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1998260&startday=2026-02-23&endday=2026-03-01&tree=all

Comment 6

[Henrik Skupin [:whimboo][⌚️UTC+1]]

The recent failures show that this failure only happens for slowly running builds like debug or ASAN/TSAN. So it's most likely a race condition and that the pause action might be too short. But still interesting why this failure only happens on beta these days.