1974413 - Intermittent mozilla/tests/mathml/mathvariant/mathvariant-1d.html | single tracking bug

Status: RESOLVED FIXED

(Core :: MathML, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: vhilla [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=515121096&repo=try
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/fde_g6y3Rn2hORJudzlL2A/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/fde_g6y3Rn2hORJudzlL2A/runs/0/artifacts/public/logs/live_backing.log&only_show_unexpected=1

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Comment 1

[Intermittent Failures Robot]

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

Repository breakdown:

• try: 2
• mozilla-central: 3

Table

	!fission	no_variant	nofis	swgl	swgl+!fission
linux2404-x86_64/asan			1
linux2404-x86_64/debug			3
linux2404-x86_64/opt			1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1974413&startday=2025-06-23&endday=2025-06-29&tree=all

Comment 2

[Intermittent Failures Robot]

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

Repository breakdown:

• mozilla-central: 5
• try: 1

Table

	!fission	no_variant	nofis	swgl	swgl+!fission
linux2404-x86_64/asan			1/17
linux2404-x86_64/debug		1/50	1/17
linux2404-x86_64/opt			3/18

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1974413&startday=2025-06-30&endday=2025-07-06&tree=all

Comment 3

[Jonathan Kew [:jfkthame]]

This looks like a case where the font needed for some of the Unicode math glyphs hasn't been initialized yet, and async font fallback is allowing rendering to proceed anyhow. We should just disable async fallback for this directory, to ensure that we get the proper rendering (assuming a suitable font is present at all).

Comment 4

[Jonathan Kew [:jfkthame]]

Attachment: Bug 1974413 - Disable async font fallback for mathml/mathvariant tests, which may need to load unusual fonts. r=#layout

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/390bb477ed55
https://hg.mozilla.org/integration/autoland/rev/53854f0b307e
Disable async font fallback for mathml/mathvariant tests, which may need to load unusual fonts. r=dholbert

Comment 6

[amarc]

https://hg.mozilla.org/mozilla-central/rev/53854f0b307e

Comment 7

[Intermittent Failures Robot]

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

Repository breakdown:

• try: 1

Table

	!fission	no_variant	swgl	swgl+!fission
linux2404-x86_64/debug		1/53

• x/y indicates test failures and total runs; only x means number of runs is unknown.

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1974413&startday=2025-07-14&endday=2025-07-20&tree=all