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Intermittent FAIL in /_mozilla/mozilla/getBoundingClientRect.html #39668

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#44248
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Intermittent FAIL in /_mozilla/mozilla/getBoundingClientRect.html#39668
#44248
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A-layout/2020https://github.com/servo/servo/wiki/Layout-2020I-intermittentProblem reproduces intermittently.

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@yezhizhen
yezhizhen
opened on Oct 5, 2025
  ▶ OK /_mozilla/mozilla/getBoundingClientRect.html
  │   ▶ FAIL [expected PASS] getBoundingClientRect 1
  │   │   → assert_equals: expected 62 but got 60.35

https://github.com/servo/servo/actions/runs/18253615518/job/51972156592

Activity

  1. yezhizhen
    added
    I-intermittentProblem reproduces intermittently.
    A-layout/2020https://github.com/servo/servo/wiki/Layout-2020
    on Oct 5, 2025

  2. yezhizhen commented on Oct 5, 2025

    @yezhizhen
    yezhizhen
    on Oct 5, 2025
    MemberAuthor

    https://github.com/servo/servo/blob/main/tests/wpt/mozilla/tests/mozilla/getBoundingClientRect.html

    It is surprising to me that this test can be intermittent. @Loirooriol Do you know any potential reason?

  3. TimvdLippe commented on Oct 5, 2025

    @TimvdLippe
    TimvdLippe
    on Oct 5, 2025
    Contributor

    I suspect the reason many css tests are currently flaky is equivalent to the reason this test flakes.

  4. Loirooriol commented on Oct 5, 2025

    @Loirooriol
    Loirooriol
    on Oct 5, 2025
    Contributor

    Potential reason ideas:

    • The screenshot is taken without waiting for the load event
    • The load event is dispatched before fonts have been loaded
    • Some incremental layout bug prevents updating after fonts load
  5. mrobinson
    added a commit that references this issue on Apr 15, 2026

    wpt: Make `/_mozilla/mozilla/getBoundingClientRect.html` wait for fon…

    a5fcd78
  6. github-merge-queue
    added a commit that references this issue on Apr 15, 2026

    wpt: Make `/_mozilla/mozilla/getBoundingClientRect.html` wait for fon…

    730fa9d
  7. TimvdLippe
    closed this as completedin #44248on Apr 15, 2026
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