font: Filter out downloaded web fonts before starting to download another web font by minghuaw · Pull Request #43382 · servo/servo

minghuaw · 2026-03-18T09:52:57Z

Checks the web font sources and filter out the ones that are already downloaded in the FontContext before starting to load new ones

Testing: Existing WPT tests.

Signed-off-by: Minghua Wu <michael.wu1107@gmail.com>

mrobinson

Looks good, just some minor comments to address before landing.

github-actions · 2026-03-18T12:41:56Z

🔨 Triggering try run (#23245177355) for Linux (WPT)

minghuaw · 2026-03-18T12:41:58Z

@mrobinson Thanks for the review. This currently fails one WPT test. Let me address that first

github-actions · 2026-03-18T13:08:23Z

Test results for linux-wpt from try job (#23245177355):

Flaky unexpected result (18)

TIMEOUT /FileAPI/url/url-in-tags-revoke.window.html (#19978)
- TIMEOUT [expected PASS] subtest: Fetching a blob URL immediately before revoking it works in <script> tags.
```
Test timed out
```

OK /_mozilla/css/offset_properties_inline.html (#40543)

FAIL [expected PASS] subtest: offsetTop

assert_equals: offsetTop of #inline-1 should be 0. expected 0 but got -1

FAIL [expected PASS] subtest: offsetLeft

assert_equals: offsetLeft of #inline-2 should be 40. expected 40 but got 25

CRASH [expected OK] /_webgl/conformance/textures/image_data/tex-2d-rgba-rgba-unsigned_short_5_5_5_1.html
FAIL [expected PASS] /css/css-backgrounds/background-size-042.html
ERROR /fetch/metadata/generated/serviceworker.https.sub.html (#36247)
- PASS [expected FAIL] subtest: sec-fetch-site - Same origin, no options - registration
CRASH [expected OK] /html/browsers/browsing-the-web/back-forward-cache/service-worker-controlled-after-restore.https.html
TIMEOUT [expected OK] /html/semantics/embedded-content/the-iframe-element/iframe_sandbox_navigate_other_frame_popup.sub.html (#39702)
- TIMEOUT [expected FAIL] subtest: Sandboxed iframe can not navigate other frame's popup
```
Test timed out
```
OK /html/semantics/forms/form-submission-0/jsurl-form-submit.tentative.html (#36489)
- PASS [expected FAIL] subtest: Verifies that form submissions scheduled inside javascript: urls take precedence over the javascript: url's return value.

OK /html/semantics/scripting-1/the-script-element/execution-timing/077.html (#22139)

FAIL [expected PASS] subtest: adding several types of scripts through the DOM and removing some of them confuses scheduler

assert_array_equals: expected property 1 to be "Script #1 ran" but got "Script #3 ran" (expected array ["Script #2 ran", "Script #1 ran", "Script #3 ran", "Script #4 ran"] got ["Script #2 ran", "Script #3 ran", "Script #4 ran", "Script #1 ran"])

OK /mixed-content/tentative/autoupgrades/audio-upgrade.https.sub.html (#41697)
- FAIL [expected PASS] subtest: Audio of other host autoupgraded
```
assert_equals: Length of other host audio is correct expected 1 but got Infinity
```
PASS [expected FAIL] /png/apng/acTL-plays-one.html (#41218)
OK /resource-timing/buffer-full-add-then-clear.html (#40819)
- FAIL [expected PASS] subtest: Test that if the buffer is cleared after entries were added to the secondary buffer, those entries make it into the primary one
```
assert_equals: Number of entries does not match the expected value. expected 3 but got 0
```
OK /touch-events/single-tap-when-touchend-listener-use-sync-xhr.html (#41175)
- FAIL [expected PASS] subtest: Click event should be fired when touchend opens synchronous XHR
```
assert_equals: expected "touchend@div, mousedown@div, mouseup@div, click@div" but got "touchend@div"
```
TIMEOUT [expected OK] /trusted-types/trusted-types-navigation.html?01-05 (#38975)
- TIMEOUT [expected PASS] subtest: Navigate a window via anchor with javascript:-urls in report-only mode.
```
Test timed out
```
- NOTRUN [expected PASS] subtest: Navigate a window via anchor with javascript:-urls w/ default policy in report-only mode.
- NOTRUN [expected PASS] subtest: Navigate a frame via anchor with javascript:-urls in enforcing mode.
TIMEOUT /trusted-types/trusted-types-navigation.html?06-10 (#37920)
- PASS [expected FAIL] subtest: Navigate a frame via anchor with javascript:-urls in report-only mode.
OK /visual-viewport/resize-event-order.html (#41981)
- PASS [expected FAIL] subtest: Popup: DOMWindow resize fired before VisualViewport.
CRASH [expected OK] /webaudio/the-audio-api/the-mediastreamaudiodestinationnode-interface/closed-audiocontext-construction.html
OK [expected ERROR] /webxr/render_state_update.https.html (#27535)

Stable unexpected results that are known to be intermittent (21)

OK /FileAPI/url/url-with-fetch.any.html (#21517)
- PASS [expected FAIL] subtest: Revoke blob URL after calling fetch, fetch should succeed
FAIL [expected PASS] /_mozilla/mozilla/sslfail.html (#10760)
TIMEOUT [expected OK] /_mozilla/mozilla/window_resize_event.html (#36741)
- TIMEOUT [expected PASS] subtest: Popup onresize event fires after resizeTo
```
Test timed out
```
OK /_webgl/conformance/textures/misc/texture-upload-size.html (#21770)
- PASS [expected FAIL] subtest: WebGL test #45
- PASS [expected FAIL] subtest: WebGL test #47
- PASS [expected FAIL] subtest: WebGL test #49
- PASS [expected FAIL] subtest: WebGL test #51
- FAIL [expected PASS] subtest: WebGL test #53
```
assert_true: Texture was smaller than the expected size 2x2 expected true got false
```
- FAIL [expected PASS] subtest: WebGL test #55
```
assert_true: getError expected: INVALID_VALUE. Was NO_ERROR : when calling texSubImage2D with the same texture upload with offset 1, 1 expected true got false
```
- FAIL [expected PASS] subtest: WebGL test #57
```
assert_true: Texture was smaller than the expected size 2x2 expected true got false
```
- FAIL [expected PASS] subtest: WebGL test #59
```
assert_true: getError expected: INVALID_VALUE. Was NO_ERROR : when calling texSubImage2D with the same texture upload with offset 1, 1 expected true got false
```
- PASS [expected FAIL] subtest: WebGL test #61
- PASS [expected FAIL] subtest: WebGL test #63
- And 6 more unexpected results...
OK [expected TIMEOUT] /content-security-policy/inheritance/document-write-iframe.html (#41195)
- PASS [expected TIMEOUT] subtest: document.open() keeps inherited CSPs on transient about:blank.
OK /css/css-cascade/layer-cssom-order-reverse.html (#36094)
- FAIL [expected PASS] subtest: Insert layer invalidates @font-face
```
assert_equals: expected "220px" but got "133px"
```
OK /css/css-cascade/layer-font-face-override.html (#35935)
- PASS [expected FAIL] subtest: @font-face override update with appended sheet 1
- PASS [expected FAIL] subtest: @font-face override update with appended sheet 2
OK /css/css-fonts/generic-family-keywords-001.html (#37467)
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted generic(fangsong)
```
assert_equals: quoted generic(fangsong) matches  @font-face rule expected 50 but got 30
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted generic(kai)
```
assert_equals: quoted generic(kai) matches  @font-face rule expected 50 but got 30
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted generic(khmer-mul)
```
assert_equals: quoted generic(khmer-mul) matches  @font-face rule expected 50 but got 30
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted generic(nastaliq)
```
assert_equals: quoted generic(nastaliq) matches  @font-face rule expected 50 but got 30
```
OK /css/css-fonts/generic-family-keywords-003.html (#38994)
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted serif (drawing text in a canvas)
```
assert_equals: quoted serif matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted sans-serif (drawing text in a canvas)
```
assert_equals: quoted sans-serif matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted cursive (drawing text in a canvas)
```
assert_equals: quoted cursive matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted fantasy (drawing text in a canvas)
```
assert_equals: quoted fantasy matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted monospace (drawing text in a canvas)
```
assert_equals: quoted monospace matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted system-ui (drawing text in a canvas)
```
assert_equals: quoted system-ui matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted generic(fangsong) (drawing text in a canvas)
```
assert_equals: quoted generic(fangsong) matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted generic(khmer-mul) (drawing text in a canvas)
```
assert_equals: quoted generic(khmer-mul) matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted generic(nastaliq) (drawing text in a canvas)
```
assert_equals: quoted generic(nastaliq) matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted ui-serif (drawing text in a canvas)
```
assert_equals: quoted ui-serif matches  @font-face rule expected 125 but got 40
```
TIMEOUT [expected OK] /css/css-fonts/variations/at-font-face-font-matching.html (#20684)
- TIMEOUT [expected PASS] subtest: Matching font-weight: '400' should prefer '400' over '450 460'
```
Test timed out
```
- NOTRUN [expected PASS] subtest: Matching font-weight: '400' should prefer '450 460' over '500'
- NOTRUN [expected PASS] subtest: Matching font-weight: '400' should prefer '500' over '350 399'
- NOTRUN [expected PASS] subtest: Matching font-weight: '400' should prefer '350 399' over '351 398'
- NOTRUN [expected PASS] subtest: Matching font-weight: '400' should prefer '351 398' over '501 550'
- NOTRUN [expected PASS] subtest: Matching font-weight: '400' should prefer '501 550' over '502 560'
- NOTRUN [expected PASS] subtest: Matching font-weight: '430' should prefer '420 440' over '450 460'
- NOTRUN [expected PASS] subtest: Matching font-weight: '430' should prefer '450 460' over '500'
- NOTRUN [expected PASS] subtest: Matching font-weight: '430' should prefer '500' over '400 425'
- NOTRUN [expected PASS] subtest: Matching font-weight: '430' should prefer '400 425' over '350 399'
- And 94 more unexpected results...
TIMEOUT [expected OK] /fetch/api/redirect/redirect-keepalive.https.any.html (#32153)
- TIMEOUT [expected PASS] subtest: [keepalive][iframe][load] mixed content redirect; setting up
```
Test timed out
```
ERROR [expected OK] /fetch/fetch-later/quota/same-origin-iframe/accumulated-oversized-payload.https.window.html (#41705)
ERROR [expected OK] /focus/focus-event-after-switching-iframes.sub.html (#40368)

OK /html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html (#28697)

FAIL [expected PASS] subtest: aElement.click() before the load event must NOT replace

assert_equals: expected "http://web-platform.test:8000/common/blank.html?thereplacement" but got "http://web-platform.test:8000/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/code-injector.html?pipe=sub(none)&amp;code=%0A%20%20%20%20const%20a%20%3D%20document.createElement(%22a%22)%3B%0A%20%20%20%20a.href%20%3D%20%22%2Fcommon%2Fblank.html%3Fthereplacement%22%3B%0A%20%20%20%20document.currentScript.before(a)%3B%0A%20%20%20%20a.click()%3B%0A%20%20"

OK /html/browsers/history/the-history-interface/traverse_the_history_2.html (#21383)
- FAIL [expected PASS] subtest: Multiple history traversals, last would be aborted
```
assert_array_equals: Pages opened during history navigation expected property 1 to be 3 but got 2 (expected array [6, 3] got [6, 2])
```
OK /html/browsers/history/the-history-interface/traverse_the_history_5.html (#21383)
- PASS [expected FAIL] subtest: Multiple history traversals, last would be aborted
OK [expected TIMEOUT] /html/interaction/focus/the-autofocus-attribute/document-with-fragment-top.html (#28259)
- FAIL [expected TIMEOUT] subtest: Autofocus elements in top-level browsing context's documents with "top" fragments should work.
```
assert_not_equals: got disallowed value Element node &lt;body&gt;&lt;/body&gt;
```

OK /html/webappapis/user-prompts/print-during-unload.html (#35944)

FAIL [expected PASS] subtest: print() during unload

assert_array_equals: expected property 1 to be "destination" but got "error: window.print is not a function" (expected array ["start", "destination"] got ["start", "error: window.print is not a function"])

OK /navigation-timing/test-navigation-type-reload.html (#33334)
- FAIL [expected PASS] subtest: Reload domComplete > Original domComplete
```
assert_true: Reload domComplete &gt; Original domComplete expected true got false
```
- FAIL [expected PASS] subtest: Reload domInteractive > Original domInteractive
```
assert_true: Reload domInteractive &gt; Original domInteractive expected true got false
```
- FAIL [expected PASS] subtest: Reload loadEventEnd > Original loadEventEnd
```
assert_true: Reload loadEventEnd &gt; Original loadEventEnd expected true got false
```
- FAIL [expected PASS] subtest: Reload loadEventStart > Original loadEventStart
```
assert_true: Reload loadEventStart &gt; Original loadEventStart expected true got false
```
OK /resource-timing/test_resource_timing.https.html (#25216)
- FAIL [expected PASS] subtest: PerformanceEntry has correct name, initiatorType, startTime, and duration (xmlhttprequest)
```
assert_equals: expected 54.900000000000006 but got 54.89
```
TIMEOUT /trusted-types/trusted-types-navigation.html?26-30 (#38807)
- PASS [expected TIMEOUT] subtest: Navigate a window via form-submission with javascript:-urls in report-only mode.
- PASS [expected NOTRUN] subtest: Navigate a window via form-submission with javascript:-urls w/ default policy in report-only mode.
- PASS [expected NOTRUN] subtest: Navigate a frame via form-submission with javascript:-urls in enforcing mode.
- TIMEOUT [expected NOTRUN] subtest: Navigate a frame via form-submission with javascript:-urls w/ default policy in enforcing mode.
```
Test timed out
```

Stable unexpected results (1)

OK /css/css-fonts/format-specifiers-variations.html

FAIL [expected PASS] subtest: Load Ahem with format truetype

promise_test: Unhandled rejection with value: object "NetworkError: A network error occurred."

FAIL [expected PASS] subtest: Load Ahem with format opentype

promise_test: Unhandled rejection with value: object "NetworkError: A network error occurred."

FAIL [expected PASS] subtest: Load Ahem with format woff2

promise_test: Unhandled rejection with value: object "NetworkError: A network error occurred."

FAIL [expected PASS] subtest: Load Ahem with format woff-variations

promise_test: Unhandled rejection with value: object "NetworkError: A network error occurred."

FAIL [expected PASS] subtest: Load Ahem with format truetype-variations

promise_test: Unhandled rejection with value: object "NetworkError: A network error occurred."

FAIL [expected PASS] subtest: Load Ahem with format opentype-variations

promise_test: Unhandled rejection with value: object "NetworkError: A network error occurred."

FAIL [expected PASS] subtest: Load Ahem with format woff2-variations

promise_test: Unhandled rejection with value: object "NetworkError: A network error occurred."

github-actions · 2026-03-18T13:08:31Z

⚠️ Try run (#23245177355) failed!

minghuaw · 2026-03-19T10:05:05Z

@mrobinson So the failed WPT test is this https://github.com/web-platform-tests/wpt/blob/master/css/css-fonts/format-specifiers-variations.html. The same web font is just loaded multiple times with different format. This can be easily address with changing the font_data key to include the format_hint which would also need to derive Hash in stylo, but I wonder whether that's worth it? Or another approach is like each entry in the font_data map would store a Vec<(Option<FontFaceSourceFormat>, FontData)>?

I'd like to see your opinion on this. Thanks :)

mrobinson · 2026-03-19T10:24:21Z

Is the goal here to avoid unnecessary network traffic or something else? If it's to avoid traffic, maybe the right thing to do is to trigger a successful load when the font data we are trying to load from a URL is already in FontContext::font_data. This is really tricky, because I'm not sure how we can do this properly without putting the tech and format specifier in the FontIdentifer and I don't think we actually want to do that.

minghuaw · 2026-03-19T11:01:45Z

Is the goal here to avoid unnecessary network traffic or something else? If it's to avoid traffic, maybe the right thing to do is to trigger a successful load when the font data we are trying to load from a URL is already in FontContext::font_data. This is really tricky, because I'm not sure how we can do this properly without putting the tech and format specifier in the FontIdentifer and I don't think we actually want to do that.

Thank you for the feedback. It's to avoid unnecessary network as well as unnecessary document.dirty_all_nodes(). I guess other than this WPT test case, it doesn't really affect other things?

mrobinson · 2026-03-19T12:30:48Z

I think you still have to run dirty_all_nodes because the font load might be associated with a different font-face font-family in which case a layout has to happen again, even if no new font loaded from the network.

On the other hand, I think we can add an early return path before the loader starts to download a URL that is already in the font_data cache, which simulates a successful load.

minghuaw · 2026-03-20T09:07:40Z

I think you still have to run dirty_all_nodes because the font load might be associated with a different font-face font-family in which case a layout has to happen again, even if no new font loaded from the network.

On the other hand, I think we can add an early return path before the loader starts to download a URL that is already in the font_data cache, which simulates a successful load.

Would checking if the newly loaded font is associated with a new font-family be cheaper than dirtying all nodes?

mrobinson · 2026-03-20T09:10:55Z

In the case that the font is associated with an existing font-family, don't you still have to dirty all nodes, because in that case the nodes using the font need to be rendered again? The family they are using the same, but it refers a potentially different Font (the data may have changed even if the URL hasn't).

minghuaw · 2026-03-20T09:19:50Z

In the case that the font is associated with an existing font-family, don't you still have to dirty all nodes, because in that case the nodes using the font need to be rendered again? The family they are using the same, but it refers a potentially different Font (the data may have changed even if the URL hasn't).

If the font is associated with an existing font-family and the font is not found in font_data, then we definitely need to dirty all nodes. But if the font is already loaded in font_data and is associated with an existing font-family, I guess then it's okay to skip dirtying all nodes?

mrobinson · 2026-03-20T09:41:32Z

Yes, perhaps so, as long as the new font family name and format are the same as the previous font family name and format.

minghuaw · 2026-03-20T12:34:16Z

Yes, perhaps so, as long as the new font family name and format are the same as the previous font family name and format.

Sounds good. Let me give this a try

Signed-off-by: Minghua Wu <michael.wu1107@gmail.com>

github-actions · 2026-03-23T05:54:12Z

🔨 Triggering try run (#23423524954) for Linux (WPT)

github-actions · 2026-03-23T06:30:40Z

✨ Try run (#23423524954) succeeded.

Signed-off-by: Minghua Wu <michael.wu1107@gmail.com>

github-actions · 2026-03-23T09:55:35Z

🔨 Triggering try run (#23431444246) for Linux (WPT)

github-actions · 2026-03-23T10:54:07Z

Test results for linux-wpt from try job (#23431444246):

Flaky unexpected result (27)

TIMEOUT /FileAPI/url/url-in-tags-revoke.window.html (#19978)
- TIMEOUT [expected PASS] subtest: Fetching a blob URL immediately before revoking it works in <script> tags.
```
Test timed out
```
PASS [expected FAIL] /_mozilla/css/linear_gradients_reverse_a.html

OK /_mozilla/css/offset_properties_inline.html (#40543)

FAIL [expected PASS] subtest: offsetTop

assert_equals: offsetTop of #inline-1 should be 0. expected 0 but got -1

FAIL [expected PASS] subtest: offsetLeft

assert_equals: offsetLeft of #inline-2 should be 40. expected 40 but got 25

TIMEOUT [expected OK] /_mozilla/mozilla/img_find_non_sibling_map.html
CRASH [expected OK] /_webgl/conformance/glsl/misc/shader-with-default-precision.vert.html
FAIL [expected PASS] /css/css-backgrounds/background-size-042.html
TIMEOUT [expected OK] /fetch/api/redirect/redirect-keepalive.https.any.html (#32153)
- TIMEOUT [expected PASS] subtest: [keepalive][iframe][load] mixed content redirect; setting up
```
Test timed out
```
OK [expected ERROR] /fetch/fetch-later/quota/cross-origin-iframe/sandboxed-iframe.https.window.html
CRASH [expected OK] /html/browsers/browsing-the-web/navigating-across-documents/anchor-fragment-form-submit.html
OK /html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.html (#29049)
- PASS [expected FAIL] subtest: Same-origin navigation started from unload handler must be ignored
OK /html/browsers/history/the-history-interface/traverse_the_history_5.html (#21383)
- PASS [expected FAIL] subtest: Multiple history traversals, last would be aborted

OK [expected TIMEOUT] /html/interaction/focus/the-autofocus-attribute/supported-elements.html (#24145)

PASS [expected TIMEOUT] subtest: Non-HTMLElement should not support autofocus

FAIL [expected NOTRUN] subtest: Host element with delegatesFocus should support autofocus

assert_equals: expected Element node &lt;div autofocus=""&gt;&lt;/div&gt; but got Element node &lt;body&gt;&lt;div autofocus=""&gt;&lt;/div&gt;&lt;/body&gt;

FAIL [expected NOTRUN] subtest: Host element with delegatesFocus including no focusable descendants should be skipped

assert_equals: expected Element node &lt;input autofocus=""&gt;&lt;/input&gt; but got Element node &lt;body&gt;&lt;div autofocus=""&gt;&lt;/div&gt;&lt;input autofocus=""&gt;&lt;/body&gt;

FAIL [expected NOTRUN] subtest: Area element should support autofocus

promise_test: Unhandled rejection with value: object "TypeError: can't access property "appendChild", w.document.querySelector(...) is null"

OK /html/semantics/document-metadata/the-meta-element/pragma-directives/attr-meta-http-equiv-refresh/allow-scripts-flag-changing-2.html (#39703)
- FAIL [expected PASS] subtest: Meta refresh of the original iframe is not blocked if moved into a sandboxed iframe
```
uncaught exception: Error: assert_unreached: The iframe into which the meta was moved must not refresh Reached unreachable code
```
TIMEOUT [expected OK] /html/semantics/embedded-content/the-iframe-element/iframe_sandbox_navigate_other_frame_popup.sub.html (#39702)
- TIMEOUT [expected FAIL] subtest: Sandboxed iframe can not navigate other frame's popup
```
Test timed out
```
OK /html/semantics/forms/form-submission-0/jsurl-form-submit.tentative.html (#36489)
- PASS [expected FAIL] subtest: Verifies that form submissions scheduled inside javascript: urls take precedence over the javascript: url's return value.
CRASH [expected ERROR] /html/semantics/forms/the-select-element/customizable-select/select-appearance-button-after-span.html

OK /html/semantics/scripting-1/the-script-element/execution-timing/077.html (#22139)

FAIL [expected PASS] subtest: adding several types of scripts through the DOM and removing some of them confuses scheduler

assert_array_equals: expected property 1 to be "Script #1 ran" but got "Script #3 ran" (expected array ["Script #2 ran", "Script #1 ran", "Script #3 ran", "Script #4 ran"] got ["Script #2 ran", "Script #3 ran", "Script #4 ran", "Script #1 ran"])

TIMEOUT [expected OK] /html/user-activation/navigation-state-reset-sameorigin.html
- TIMEOUT [expected PASS] subtest: Post-navigation state reset.
```
Test timed out
```
OK /html/webappapis/dynamic-markup-insertion/document-write/module-tla-import.html (#42419)
- FAIL [expected PASS] subtest: document.write in an imported module
```
assert_true: onload must be called expected true got false
```
FAIL [expected PASS] /png/apng/fcTL-blend-source-transparent.html (#39520)
TIMEOUT [expected OK] /preload/modulepreload-sri.html (#43354)
- TIMEOUT [expected PASS] subtest: Script should not be loaded if modulepreload's integrity is invalid
```
Test timed out
```
CRASH [expected OK] /resource-timing/render-blocking-status-link.html (#41664)
TIMEOUT /trusted-types/trusted-types-navigation.html?06-10 (#37920)
- PASS [expected FAIL] subtest: Navigate a frame via anchor with javascript:-urls in report-only mode.
OK /webdriver/tests/classic/element_click/user_prompts.py
- FAIL [expected PASS] subtest: test_accept[alert-None]
```
webdriver.error.NoSuchWindowException: no such window (404): No such window
```
OK /webdriver/tests/classic/element_send_keys/scroll_into_view.py
- FAIL [expected PASS] subtest: test_element_outside_of_not_scrollable_viewport
```
webdriver.error.NoSuchWindowException: no such window (404): No such window
```
OK /webdriver/tests/classic/element_send_keys/send_keys.py
- FAIL [expected PASS] subtest: test_null_parameter_value
```
webdriver.error.NoSuchWindowException: no such window (404): No such window
```
OK /webdriver/tests/classic/new_window/new.py
- ERROR [expected PASS] subtest: test_no_top_browsing_context
```
setup error: webdriver.error.NoSuchWindowException: no such window (404): No such window
```

Stable unexpected results that are known to be intermittent (23)

OK /FileAPI/url/url-with-fetch.any.html (#21517)
- PASS [expected FAIL] subtest: Revoke blob URL after calling fetch, fetch should succeed
FAIL [expected PASS] /_mozilla/mozilla/sslfail.html (#10760)
TIMEOUT [expected OK] /_mozilla/mozilla/window_resize_event.html (#36741)
- TIMEOUT [expected PASS] subtest: Popup onresize event fires after resizeTo
```
Test timed out
```
CRASH [expected PASS] /_mozilla/shadow-dom/move-element-with-ua-shadow-tree-crash.html (#39473)
OK /_webgl/conformance/textures/misc/texture-upload-size.html (#21770)
- PASS [expected FAIL] subtest: WebGL test #45
- PASS [expected FAIL] subtest: WebGL test #47
- PASS [expected FAIL] subtest: WebGL test #49
- PASS [expected FAIL] subtest: WebGL test #51
- FAIL [expected PASS] subtest: WebGL test #53
```
assert_true: Texture was smaller than the expected size 2x2 expected true got false
```
- FAIL [expected PASS] subtest: WebGL test #55
```
assert_true: getError expected: INVALID_VALUE. Was NO_ERROR : when calling texSubImage2D with the same texture upload with offset 1, 1 expected true got false
```
- FAIL [expected PASS] subtest: WebGL test #57
```
assert_true: Texture was smaller than the expected size 2x2 expected true got false
```
- FAIL [expected PASS] subtest: WebGL test #59
```
assert_true: getError expected: INVALID_VALUE. Was NO_ERROR : when calling texSubImage2D with the same texture upload with offset 1, 1 expected true got false
```
- PASS [expected FAIL] subtest: WebGL test #61
- PASS [expected FAIL] subtest: WebGL test #63
- And 6 more unexpected results...
OK /content-security-policy/frame-ancestors/frame-ancestors-path-ignored.window.html (#36468)
- PASS [expected FAIL] subtest: A 'frame-ancestors' CSP directive with a URL that includes a path should be ignored.
OK [expected TIMEOUT] /content-security-policy/inheritance/document-write-iframe.html (#41195)
- PASS [expected TIMEOUT] subtest: document.open() keeps inherited CSPs on transient about:blank.
OK /css/css-fonts/generic-family-keywords-001.html (#37467)
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted generic(kai)
```
assert_equals: quoted generic(kai) matches  @font-face rule expected 50 but got 30
```
OK /css/css-fonts/generic-family-keywords-003.html (#38994)
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted fantasy (drawing text in a canvas)
```
assert_equals: quoted fantasy matches  @font-face rule expected 125 but got 40
```
- PASS [expected FAIL] subtest: @font-face matching for quoted and unquoted math (drawing text in a canvas)
- PASS [expected FAIL] subtest: @font-face matching for quoted and unquoted generic(kai) (drawing text in a canvas)
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted ui-serif (drawing text in a canvas)
```
assert_equals: unquoted ui-serif does not match @font-face rule expected 40 but got 125
```
- PASS [expected FAIL] subtest: @font-face matching for quoted and unquoted ui-monospace (drawing text in a canvas)
ERROR [expected OK] /fetch/fetch-later/quota/same-origin-iframe/accumulated-oversized-payload.https.window.html (#41705)
OK /fetch/metadata/generated/css-font-face.https.sub.tentative.html (#32732)
- PASS [expected FAIL] subtest: sec-fetch-dest
ERROR [expected OK] /focus/focus-event-after-switching-iframes.sub.html (#40368)
OK /html/browsers/browsing-the-web/navigating-across-documents/005.html (#27062)
- PASS [expected FAIL] subtest: Link with onclick navigation and href navigation

OK /html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html (#28697)

FAIL [expected PASS] subtest: aElement.click() before the load event must NOT replace

assert_equals: expected "http://web-platform.test:8000/common/blank.html?thereplacement" but got "http://web-platform.test:8000/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/code-injector.html?pipe=sub(none)&amp;code=%0A%20%20%20%20const%20a%20%3D%20document.createElement(%22a%22)%3B%0A%20%20%20%20a.href%20%3D%20%22%2Fcommon%2Fblank.html%3Fthereplacement%22%3B%0A%20%20%20%20document.currentScript.before(a)%3B%0A%20%20%20%20a.click()%3B%0A%20%20"

OK /html/browsers/history/the-history-interface/traverse_the_history_2.html (#21383)
- FAIL [expected PASS] subtest: Multiple history traversals, last would be aborted
```
assert_array_equals: Pages opened during history navigation expected property 1 to be 3 but got 1 (expected array [6, 3] got [6, 1])
```
OK [expected TIMEOUT] /html/interaction/focus/the-autofocus-attribute/document-with-fragment-top.html (#28259)
- FAIL [expected TIMEOUT] subtest: Autofocus elements in top-level browsing context's documents with "top" fragments should work.
```
assert_not_equals: got disallowed value Element node &lt;body&gt;&lt;/body&gt;
```
OK [expected TIMEOUT] /html/interaction/focus/the-autofocus-attribute/update-the-rendering.html (#24145)
- FAIL [expected TIMEOUT] subtest: "Flush autofocus candidates" should be happen before a scroll event and animation frame callbacks
```
assert_array_equals: animationFrame lengths differ, expected array ["autofocus", "scroll", "animationFrame"] length 3, got ["animationFrame"] length 1
```
OK /navigation-timing/test-navigation-type-reload.html (#33334)
- FAIL [expected PASS] subtest: Reload domInteractive > Original domInteractive
```
assert_true: Reload domInteractive &gt; Original domInteractive expected true got false
```
TIMEOUT [expected OK] /preload/modulepreload-sri-importmap.html (#43354)
- TIMEOUT [expected PASS] subtest: Script should not be loaded if modulepreload's integrity is invalid
```
Test timed out
```
OK /resource-timing/test_resource_timing.https.html (#25216)
- PASS [expected FAIL] subtest: PerformanceEntry has correct name, initiatorType, startTime, and duration (iframe)
- FAIL [expected PASS] subtest: PerformanceEntry has correct name, initiatorType, startTime, and duration (xmlhttprequest)
```
assert_equals: expected 47.379999999999995 but got 47.38
```
OK /touch-events/single-tap-when-touchend-listener-use-sync-xhr.html (#41175)
- FAIL [expected PASS] subtest: Click event should be fired when touchend opens synchronous XHR
```
assert_equals: expected "touchend@div, mousedown@div, mouseup@div, click@div" but got "touchend@div"
```
TIMEOUT [expected OK] /trusted-types/trusted-types-navigation.html?01-05 (#38975)
- TIMEOUT [expected PASS] subtest: Navigate a window via anchor with javascript:-urls in report-only mode.
```
Test timed out
```
- NOTRUN [expected PASS] subtest: Navigate a window via anchor with javascript:-urls w/ default policy in report-only mode.
- NOTRUN [expected PASS] subtest: Navigate a frame via anchor with javascript:-urls in enforcing mode.
TIMEOUT /trusted-types/trusted-types-navigation.html?26-30 (#38807)
- PASS [expected TIMEOUT] subtest: Navigate a window via form-submission with javascript:-urls in report-only mode.
- PASS [expected NOTRUN] subtest: Navigate a window via form-submission with javascript:-urls w/ default policy in report-only mode.
- PASS [expected NOTRUN] subtest: Navigate a frame via form-submission with javascript:-urls in enforcing mode.
- TIMEOUT [expected NOTRUN] subtest: Navigate a frame via form-submission with javascript:-urls w/ default policy in enforcing mode.
```
Test timed out
```

github-actions · 2026-03-23T10:54:16Z

✨ Try run (#23431444246) succeeded.

github-actions · 2026-03-23T16:58:41Z

🔨 Triggering try run (#23449493572) for Linux (WPT)

github-actions · 2026-03-23T18:12:52Z

Test results for linux-wpt from try job (#23449493572):

Flaky unexpected result (27)

OK /beacon/beacon-basic.https.window.html (#41723)
- FAIL [expected PASS] subtest: Payload size restriction should be accumulated: type = string
```
assert_false: expected false got true
```
FAIL [expected PASS] /css/css-backgrounds/background-size-041.html
OK /css/css-cascade/layer-cssom-order-reverse.html (#36094)
- PASS [expected FAIL] subtest: Delete layer invalidates @font-face
OK /css/css-cascade/layer-font-face-override.html (#35935)
- PASS [expected FAIL] subtest: @font-face override update with appended sheet 1
- PASS [expected FAIL] subtest: @font-face override update with appended sheet 2
OK /css/css-fonts/generic-family-keywords-001.html (#37467)
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted generic(fangsong)
```
assert_equals: quoted generic(fangsong) matches  @font-face rule expected 50 but got 30
```
OK /css/css-fonts/generic-family-keywords-002.html (#40929)
- FAIL [expected PASS] subtest: font-family: -webkit-serif treated as <font-family>, not <generic-name>
```
assert_equals: expected 30 but got 50
```
- FAIL [expected PASS] subtest: font-family: -webkit-sans-serif treated as <font-family>, not <generic-name>
```
assert_equals: expected 30 but got 50
```
- FAIL [expected PASS] subtest: font-family: -webkit-cursive treated as <font-family>, not <generic-name>
```
assert_equals: expected 30 but got 50
```
- FAIL [expected PASS] subtest: font-family: -webkit-fantasy treated as <font-family>, not <generic-name>
```
assert_equals: expected 30 but got 50
```
- FAIL [expected PASS] subtest: font-family: -webkit-monospace treated as <font-family>, not <generic-name>
```
assert_equals: expected 30 but got 50
```
- FAIL [expected PASS] subtest: font-family: -webkit-system-ui treated as <font-family>, not <generic-name>
```
assert_equals: expected 30 but got 50
```
- FAIL [expected PASS] subtest: font-family: -webkit-math treated as <font-family>, not <generic-name>
```
assert_equals: expected 30 but got 50
```
- PASS [expected FAIL] subtest: font-family: -webkit-generic(fangsong) treated as <font-family>, not <generic-name>
- PASS [expected FAIL] subtest: font-family: -webkit-generic(kai) treated as <font-family>, not <generic-name>
- PASS [expected FAIL] subtest: font-family: -webkit-generic(khmer-mul) treated as <font-family>, not <generic-name>
- And 12 more unexpected results...
OK /css/css-fonts/variations/at-font-face-font-matching.html (#20684)
- FAIL [expected PASS] subtest: Matching font-style: 'italic' should prefer 'oblique 40deg 50deg' over 'oblique 5deg 10deg'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
FAIL [expected PASS] /css/css-ui/webkit-appearance-searchfield-001.html
TIMEOUT /fetch/metadata/generated/css-images.https.sub.tentative.html (#42229)
- FAIL [expected PASS] subtest: content sec-fetch-site - Cross-Site -> Same-Site
```
assert_unreached: Reached unreachable code
```
- PASS [expected FAIL] subtest: content sec-fetch-site - Same-Origin -> Same Origin
CRASH [expected TIMEOUT] /html/anonymous-iframe/web-lock.tentative.https.window.html
CRASH [expected OK] /html/browsers/history/the-history-interface/combination_history_006.html
OK /html/browsers/history/the-history-interface/traverse_the_history_4.html (#21383)
- FAIL [expected PASS] subtest: Multiple history traversals, last would be aborted
```
assert_array_equals: Pages opened during history navigation expected property 1 to be 5 but got 3 (expected array [6, 5] got [6, 3])
```
ERROR [expected OK] /html/canvas/offscreen/text/2d.text.measure.getActualBoundingBox.tentative.html
TIMEOUT [expected OK] /html/semantics/embedded-content/the-iframe-element/iframe_sandbox_navigate_other_frame_popup.sub.html (#39702)
- TIMEOUT [expected FAIL] subtest: Sandboxed iframe can not navigate other frame's popup
```
Test timed out
```
CRASH [expected OK] /html/semantics/forms/form-submission-0/form-submit-iframe-then-location-navigate.html (#29634)
OK /html/semantics/forms/form-submission-0/jsurl-form-submit.tentative.html (#36489)
- PASS [expected FAIL] subtest: Verifies that form submissions scheduled inside javascript: urls take precedence over the javascript: url's return value.
CRASH [expected ERROR] /html/semantics/forms/the-select-element/customizable-select/select-appearance-button-after-span.html
TIMEOUT [expected OK] /html/user-activation/navigation-state-reset-sameorigin.html
- TIMEOUT [expected PASS] subtest: Post-navigation state reset.
```
Test timed out
```
CRASH [expected ERROR] /html/webappapis/the-shadowrealmglobalscope-interface/self.any.shadowrealm-in-window.html
OK /mixed-content/tentative/autoupgrades/mixed-content-cors.https.sub.html (#41123)
- FAIL [expected PASS] subtest: Cross-Origin video should get upgraded even if CORS is set
```
assert_equals: Length. Other host expected 1 but got Infinity
```
FAIL [expected PASS] /png/apng/fcTL-dispose-previous-first.html
TIMEOUT [expected OK] /preload/modulepreload-sri.html (#43354)
- TIMEOUT [expected PASS] subtest: Script should not be loaded if modulepreload's integrity is invalid
```
Test timed out
```
OK [expected TIMEOUT] /trusted-types/trusted-types-navigation.html?06-10 (#37920)
- PASS [expected FAIL] subtest: Navigate a frame via anchor with javascript:-urls in report-only mode.
- PASS [expected TIMEOUT] subtest: Navigate a frame via anchor with javascript:-urls w/ default policy in report-only mode.
- FAIL [expected NOTRUN] subtest: Navigate a window via anchor with javascript:-urls w/ a default policy throwing an exception in enforcing mode.
```
promise_test: Unhandled rejection with value: "Unexpected message received: \"No securitypolicyviolation reported!\""
```
- FAIL [expected NOTRUN] subtest: Navigate a window via anchor with javascript:-urls w/ a default policy throwing an exception in report-only mode.
```
promise_test: Unhandled rejection with value: "Unexpected message received: \"No securitypolicyviolation reported!\""
```
TIMEOUT /trusted-types/trusted-types-navigation.html?31-35 (#38034)
- TIMEOUT [expected PASS] subtest: Navigate a frame via form-submission with javascript:-urls in report-only mode.
```
Test timed out
```
- NOTRUN [expected TIMEOUT] subtest: Navigate a frame via form-submission with javascript:-urls w/ default policy in report-only mode.
OK /visual-viewport/resize-event-order.html (#41981)
- PASS [expected FAIL] subtest: Popup: DOMWindow resize fired before VisualViewport.
OK [expected TIMEOUT] /webmessaging/without-ports/018.html (#24485)
- PASS [expected TIMEOUT] subtest: origin of the script that invoked the method, javascript:
CRASH [expected OK] /workers/WorkerGlobalScope_importScripts.htm

Stable unexpected results that are known to be intermittent (22)

OK /FileAPI/url/url-with-fetch.any.html (#21517)
- PASS [expected FAIL] subtest: Revoke blob URL after calling fetch, fetch should succeed
FAIL [expected PASS] /_mozilla/mozilla/sslfail.html (#10760)
TIMEOUT [expected OK] /_mozilla/mozilla/window_resize_event.html (#36741)
- TIMEOUT [expected PASS] subtest: Popup onresize event fires after resizeTo
```
Test timed out
```
OK /_webgl/conformance/textures/misc/texture-upload-size.html (#21770)
- PASS [expected FAIL] subtest: WebGL test #45
- PASS [expected FAIL] subtest: WebGL test #47
- PASS [expected FAIL] subtest: WebGL test #49
- PASS [expected FAIL] subtest: WebGL test #51
- FAIL [expected PASS] subtest: WebGL test #53
```
assert_true: Texture was smaller than the expected size 2x2 expected true got false
```
- FAIL [expected PASS] subtest: WebGL test #55
```
assert_true: getError expected: INVALID_VALUE. Was NO_ERROR : when calling texSubImage2D with the same texture upload with offset 1, 1 expected true got false
```
- FAIL [expected PASS] subtest: WebGL test #57
```
assert_true: Texture was smaller than the expected size 2x2 expected true got false
```
- FAIL [expected PASS] subtest: WebGL test #59
```
assert_true: getError expected: INVALID_VALUE. Was NO_ERROR : when calling texSubImage2D with the same texture upload with offset 1, 1 expected true got false
```
- PASS [expected FAIL] subtest: WebGL test #61
- PASS [expected FAIL] subtest: WebGL test #63
- And 14 more unexpected results...
OK /content-security-policy/frame-ancestors/frame-ancestors-path-ignored.window.html (#36468)
- PASS [expected FAIL] subtest: A 'frame-ancestors' CSP directive with a URL that includes a path should be ignored.
TIMEOUT [expected OK] /credential-management/credentialscontainer-frame-basics.https.html (#39430)
- TIMEOUT [expected FAIL] subtest: navigator.credentials should be undefined in documents generated from data: URLs.
```
Test timed out
```
OK /css/css-fonts/generic-family-keywords-003.html (#38994)
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted cursive (drawing text in a canvas)
```
assert_equals: quoted cursive matches  @font-face rule expected 125 but got 40
```
- PASS [expected FAIL] subtest: @font-face matching for quoted and unquoted math (drawing text in a canvas)
- PASS [expected FAIL] subtest: @font-face matching for quoted and unquoted generic(kai) (drawing text in a canvas)
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted ui-serif (drawing text in a canvas)
```
assert_equals: unquoted ui-serif does not match @font-face rule expected 40 but got 125
```
ERROR [expected OK] /fetch/fetch-later/quota/same-origin-iframe/accumulated-oversized-payload.https.window.html (#41705)
OK /fetch/metadata/generated/css-font-face.sub.tentative.html (#34624)
- PASS [expected FAIL] subtest: sec-fetch-storage-access - Not sent to non-trustworthy same-origin destination
- PASS [expected FAIL] subtest: sec-fetch-storage-access - Not sent to non-trustworthy cross-site destination
OK /html/browsers/browsing-the-web/navigating-across-documents/005.html (#27062)
- PASS [expected FAIL] subtest: Link with onclick navigation and href navigation
OK /html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html (#20768)
- PASS [expected FAIL] subtest: Tests that a fragment navigation in the unload handler will not block the initial navigation

OK /html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html (#28697)

FAIL [expected PASS] subtest: aElement.click() before the load event must NOT replace

assert_equals: expected "http://web-platform.test:8000/common/blank.html?thereplacement" but got "http://web-platform.test:8000/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/code-injector.html?pipe=sub(none)&amp;code=%0A%20%20%20%20const%20a%20%3D%20document.createElement(%22a%22)%3B%0A%20%20%20%20a.href%20%3D%20%22%2Fcommon%2Fblank.html%3Fthereplacement%22%3B%0A%20%20%20%20document.currentScript.before(a)%3B%0A%20%20%20%20a.click()%3B%0A%20%20"

OK /html/browsers/history/the-history-interface/traverse_the_history_5.html (#21383)
- PASS [expected FAIL] subtest: Multiple history traversals, last would be aborted
OK [expected TIMEOUT] /html/interaction/focus/the-autofocus-attribute/document-with-fragment-top.html (#28259)
- FAIL [expected TIMEOUT] subtest: Autofocus elements in top-level browsing context's documents with "top" fragments should work.
```
assert_not_equals: got disallowed value Element node &lt;body&gt;&lt;/body&gt;
```

OK [expected TIMEOUT] /html/interaction/focus/the-autofocus-attribute/supported-elements.html (#24145)

PASS [expected TIMEOUT] subtest: Non-HTMLElement should not support autofocus

FAIL [expected NOTRUN] subtest: Host element with delegatesFocus should support autofocus

assert_equals: expected Element node &lt;div autofocus=""&gt;&lt;/div&gt; but got Element node &lt;body&gt;&lt;div autofocus=""&gt;&lt;/div&gt;&lt;/body&gt;

FAIL [expected NOTRUN] subtest: Host element with delegatesFocus including no focusable descendants should be skipped

assert_equals: expected Element node &lt;input autofocus=""&gt;&lt;/input&gt; but got Element node &lt;body&gt;&lt;/body&gt;

FAIL [expected NOTRUN] subtest: Area element should support autofocus

assert_equals: expected Element node &lt;area autofocus="" href="/common/blank.html"&gt;&lt;/area&gt; but got Element node &lt;body&gt;
&lt;img src="/media/poster.png" usemap="#map"&gt;
&lt;map n...

OK /html/webappapis/user-prompts/print-during-unload.html (#35944)

FAIL [expected PASS] subtest: print() during unload

assert_array_equals: expected property 1 to be "destination" but got "error: window.print is not a function" (expected array ["start", "destination"] got ["start", "error: window.print is not a function"])

OK /navigation-timing/test-navigation-type-reload.html (#33334)
- FAIL [expected PASS] subtest: Reload domInteractive > Original domInteractive
```
assert_true: Reload domInteractive &gt; Original domInteractive expected true got false
```
OK /resource-timing/test_resource_timing.https.html (#25216)
- FAIL [expected PASS] subtest: PerformanceEntry has correct name, initiatorType, startTime, and duration (xmlhttprequest)
```
assert_equals: expected 48.00000000000001 but got 48
```
OK /touch-events/single-tap-when-touchend-listener-use-sync-xhr.html (#41175)
- FAIL [expected PASS] subtest: Click event should be fired when touchend opens synchronous XHR
```
assert_equals: expected "touchend@div, mousedown@div, mouseup@div, click@div" but got "touchend@div"
```
TIMEOUT [expected OK] /trusted-types/trusted-types-navigation.html?01-05 (#38975)
- TIMEOUT [expected PASS] subtest: Navigate a window via anchor with javascript:-urls in report-only mode.
```
Test timed out
```
- NOTRUN [expected PASS] subtest: Navigate a window via anchor with javascript:-urls w/ default policy in report-only mode.
- NOTRUN [expected PASS] subtest: Navigate a frame via anchor with javascript:-urls in enforcing mode.
OK [expected TIMEOUT] /webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.html (#29053)
- PASS [expected TIMEOUT] subtest: StorageKey: test 3P about:blank window opened from a 3P iframe
OK [expected ERROR] /webxr/render_state_update.https.html (#27535)

github-actions · 2026-03-23T18:13:02Z

✨ Try run (#23449493572) succeeded.

Signed-off-by: Minghua Wu <michael.wu1107@gmail.com>

github-actions · 2026-03-24T03:26:25Z

🔨 Triggering try run (#23471632869) for Linux (WPT)

github-actions · 2026-03-24T03:53:52Z

Test results for linux-wpt from try job (#23471632869):

Flaky unexpected result (19)

OK /IndexedDB/idbtransaction-oncomplete.any.worker.html (#42804)

FAIL [expected PASS] subtest: IDBTransaction - complete event

assert_array_equals: lengths differ, expected array ["upgradeneeded", "complete", "success", "opencursor"] length 4, got ["upgradeneeded", "complete", "success"] length 3

OK /_mozilla/css/offset_properties_inline.html (#40543)

FAIL [expected PASS] subtest: offsetTop

assert_equals: offsetTop of #inline-1 should be 0. expected 0 but got -1

FAIL [expected PASS] subtest: offsetLeft

assert_equals: offsetLeft of #inline-2 should be 40. expected 40 but got 25

CRASH [expected OK] /_webgl/conformance2/wasm/readpixels-2gb-in-4gb-wasm-memory.html
OK /content-security-policy/frame-ancestors/frame-ancestors-path-ignored.window.html (#36468)
- PASS [expected FAIL] subtest: A 'frame-ancestors' CSP directive with a URL that includes a path should be ignored.
FAIL [expected PASS] /css/css-backgrounds/background-size-041.html
ERROR /fetch/metadata/generated/serviceworker.https.sub.html (#36247)
- PASS [expected FAIL] subtest: sec-fetch-site - Same origin, no options - registration
OK /html/browsers/browsing-the-web/navigating-across-documents/008.html (#24456)
- PASS [expected FAIL] subtest: Link with onclick form submit to javascript url and href navigation
OK [expected TIMEOUT] /html/semantics/embedded-content/media-elements/src_object_blob.html (#40340)
- PASS [expected TIMEOUT] subtest: HTMLMediaElement.srcObject blob
TIMEOUT [expected OK] /html/semantics/embedded-content/the-iframe-element/iframe_sandbox_navigate_other_frame_popup.sub.html (#39702)
- TIMEOUT [expected FAIL] subtest: Sandboxed iframe can not navigate other frame's popup
```
Test timed out
```
TIMEOUT [expected OK] /html/user-activation/navigation-state-reset-sameorigin.html
- TIMEOUT [expected PASS] subtest: Post-navigation state reset.
```
Test timed out
```
CRASH [expected OK] /html/webappapis/scripting/reporterror.any.worker.html
FAIL [expected PASS] /png/apng/fcTL-dispose-previous.html (#41561)
OK /preload/prefetch-document.html (#37210)
- FAIL [expected PASS] subtest: different-site document prefetch with 'as=document' should not be consumed
```
assert_equals: expected 2 but got 1
```
OK [expected TIMEOUT] /trusted-types/trusted-types-navigation.html?26-30 (#38807)
- PASS [expected TIMEOUT] subtest: Navigate a window via form-submission with javascript:-urls in report-only mode.
- PASS [expected NOTRUN] subtest: Navigate a window via form-submission with javascript:-urls w/ default policy in report-only mode.
- PASS [expected NOTRUN] subtest: Navigate a frame via form-submission with javascript:-urls in enforcing mode.
- PASS [expected NOTRUN] subtest: Navigate a frame via form-submission with javascript:-urls w/ default policy in enforcing mode.
OK /visual-viewport/resize-event-order.html (#41981)
- PASS [expected FAIL] subtest: Popup: DOMWindow resize fired before VisualViewport.
OK /webdriver/tests/classic/accept_alert/accept.py (#43194)
- FAIL [expected PASS] subtest: test_accept_in_popup_window
```
AssertionError: no such alert (404): No user prompt is currently active.
```
OK /webdriver/tests/classic/element_send_keys/file_upload.py
- FAIL [expected PASS] subtest: test_empty_text
```
webdriver.error.NoSuchWindowException: no such window (404): No such window
```
OK /webdriver/tests/classic/get_element_attribute/user_prompts.py
- FAIL [expected PASS] subtest: test_accept[alert-None]
```
webdriver.error.NoSuchWindowException: no such window (404): No such window
```
OK /webxr/xrSession_features_deviceSupport.https.html (#24357)
- FAIL [expected PASS] subtest: Immersive XRSession requests with no supported device should reject
```
assert_unreached: Should have rejected: undefined Reached unreachable code
```

Stable unexpected results that are known to be intermittent (21)

OK /FileAPI/url/url-with-fetch.any.html (#21517)
- PASS [expected FAIL] subtest: Revoke blob URL after calling fetch, fetch should succeed
FAIL [expected PASS] /_mozilla/mozilla/sslfail.html (#10760)
TIMEOUT [expected OK] /_mozilla/mozilla/window_resize_event.html (#36741)
- TIMEOUT [expected PASS] subtest: Popup onresize event fires after resizeTo
```
Test timed out
```
OK [expected TIMEOUT] /content-security-policy/inheritance/document-write-iframe.html (#41195)
- PASS [expected TIMEOUT] subtest: document.open() keeps inherited CSPs on transient about:blank.
OK /css/css-fonts/generic-family-keywords-001.html (#37467)
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted generic(fangsong)
```
assert_equals: quoted generic(fangsong) matches  @font-face rule expected 50 but got 30
```
OK /css/css-fonts/generic-family-keywords-003.html (#38994)
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted sans-serif (drawing text in a canvas)
```
assert_equals: quoted sans-serif matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted cursive (drawing text in a canvas)
```
assert_equals: quoted cursive matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted fantasy (drawing text in a canvas)
```
assert_equals: quoted fantasy matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted monospace (drawing text in a canvas)
```
assert_equals: quoted monospace matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted system-ui (drawing text in a canvas)
```
assert_equals: quoted system-ui matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted generic(fangsong) (drawing text in a canvas)
```
assert_equals: quoted generic(fangsong) matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted generic(khmer-mul) (drawing text in a canvas)
```
assert_equals: quoted generic(khmer-mul) matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted generic(nastaliq) (drawing text in a canvas)
```
assert_equals: quoted generic(nastaliq) matches  @font-face rule expected 125 but got 40
```
- FAIL [expected PASS] subtest: @font-face matching for quoted and unquoted ui-serif (drawing text in a canvas)
```
assert_equals: quoted ui-serif matches  @font-face rule expected 125 but got 40
```
- PASS [expected FAIL] subtest: @font-face matching for quoted and unquoted ui-monospace (drawing text in a canvas)
OK /fetch/metadata/generated/css-font-face.https.sub.tentative.html (#32732)
- PASS [expected FAIL] subtest: sec-fetch-mode
- PASS [expected FAIL] subtest: sec-fetch-user
TIMEOUT /fetch/metadata/generated/css-images.sub.tentative.html (#29047)
- FAIL [expected PASS] subtest: content sec-fetch-site - HTTPS downgrade-upgrade
```
assert_unreached: Reached unreachable code
```
OK /html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html (#20768)
- PASS [expected FAIL] subtest: Tests that a fragment navigation in the unload handler will not block the initial navigation
OK /html/browsers/history/the-history-interface/traverse_the_history_2.html (#21383)
- FAIL [expected PASS] subtest: Multiple history traversals, last would be aborted
```
assert_array_equals: Pages opened during history navigation expected property 1 to be 3 but got 2 (expected array [6, 3] got [6, 2])
```
OK /html/browsers/history/the-history-interface/traverse_the_history_3.html (#21383)
- PASS [expected FAIL] subtest: Multiple history traversals, last would be aborted
OK [expected TIMEOUT] /html/interaction/focus/the-autofocus-attribute/document-with-fragment-top.html (#28259)
- FAIL [expected TIMEOUT] subtest: Autofocus elements in top-level browsing context's documents with "top" fragments should work.
```
assert_not_equals: got disallowed value Element node &lt;body&gt;&lt;/body&gt;
```

OK [expected TIMEOUT] /html/interaction/focus/the-autofocus-attribute/supported-elements.html (#24145)

PASS [expected TIMEOUT] subtest: Non-HTMLElement should not support autofocus

FAIL [expected NOTRUN] subtest: Host element with delegatesFocus should support autofocus

assert_equals: expected Element node &lt;div autofocus=""&gt;&lt;/div&gt; but got Element node &lt;body&gt;&lt;/body&gt;

FAIL [expected NOTRUN] subtest: Host element with delegatesFocus including no focusable descendants should be skipped

assert_equals: expected Element node &lt;input autofocus=""&gt;&lt;/input&gt; but got Element node &lt;body&gt;&lt;div autofocus=""&gt;&lt;/div&gt;&lt;input autofocus=""&gt;&lt;/body&gt;

FAIL [expected NOTRUN] subtest: Area element should support autofocus

promise_test: Unhandled rejection with value: object "TypeError: can't access property "appendChild", w.document.querySelector(...) is null"

OK /html/semantics/scripting-1/the-script-element/execution-timing/077.html (#22139)

FAIL [expected PASS] subtest: adding several types of scripts through the DOM and removing some of them confuses scheduler

assert_array_equals: expected property 1 to be "Script #1 ran" but got "Script #3 ran" (expected array ["Script #2 ran", "Script #1 ran", "Script #3 ran", "Script #4 ran"] got ["Script #2 ran", "Script #3 ran", "Script #4 ran", "Script #1 ran"])

OK /navigation-timing/test-navigation-type-reload.html (#33334)
- FAIL [expected PASS] subtest: Reload domInteractive > Original domInteractive
```
assert_true: Reload domInteractive &gt; Original domInteractive expected true got false
```
OK /pointerevents/compat/pointerevent_touch_target_after_pointerdown_target_removed.tentative.html (#42813)
- PASS [expected FAIL] subtest: After a pointerdown listener moves the target to different position, touch events should be fired on the pointerdown target, but pointer events should be fired on the pointerdown target parent
- PASS [expected FAIL] subtest: After a pointerdown listener moves the target to different position, touchmove event should be fired on the pointerdown target parent
OK /resource-timing/buffer-full-add-then-clear.html (#40819)
- FAIL [expected PASS] subtest: Test that if the buffer is cleared after entries were added to the secondary buffer, those entries make it into the primary one
```
assert_equals: Number of entries does not match the expected value. expected 3 but got 0
```
OK /resource-timing/test_resource_timing.html (#25720)
- PASS [expected FAIL] subtest: PerformanceEntry has correct name, initiatorType, startTime, and duration (img)
OK /resource-timing/test_resource_timing.https.html (#25216)
- FAIL [expected PASS] subtest: PerformanceEntry has correct name, initiatorType, startTime, and duration (xmlhttprequest)
```
assert_equals: expected 48.43000000000001 but got 48.42
```
OK /touch-events/single-tap-when-touchend-listener-use-sync-xhr.html (#41175)
- FAIL [expected PASS] subtest: Click event should be fired when touchend opens synchronous XHR
```
assert_equals: expected "touchend@div, mousedown@div, mouseup@div, click@div" but got "touchend@div, mousedown@div"
```
TIMEOUT [expected OK] /trusted-types/trusted-types-navigation.html?01-05 (#38975)
- TIMEOUT [expected PASS] subtest: Navigate a window via anchor with javascript:-urls in report-only mode.
```
Test timed out
```
- NOTRUN [expected PASS] subtest: Navigate a window via anchor with javascript:-urls w/ default policy in report-only mode.
- NOTRUN [expected PASS] subtest: Navigate a frame via anchor with javascript:-urls in enforcing mode.

github-actions · 2026-03-24T03:54:00Z

✨ Try run (#23471632869) succeeded.

minghuaw · 2026-03-24T09:53:54Z

@mrobinson This should be ready to get merged.

minghuaw added 2 commits March 18, 2026 17:12

filter loaded webfont

5ec8b6f

Signed-off-by: Minghua Wu <michael.wu1107@gmail.com>

minor fix

712b991

Signed-off-by: Minghua Wu <michael.wu1107@gmail.com>

minghuaw requested review from Loirooriol, gterzian, mrobinson and nicoburns as code owners March 18, 2026 09:52

servo-highfive added the S-awaiting-review There is new code that needs to be reviewed. label Mar 18, 2026

mrobinson approved these changes Mar 18, 2026

View reviewed changes

Comment thread components/layout/layout_impl.rs Outdated

Comment thread components/fonts/font_context.rs Outdated

Comment thread components/fonts/font_context.rs Outdated

servo-highfive removed the S-awaiting-review There is new code that needs to be reviewed. label Mar 18, 2026

minghuaw added the T-linux-wpt Do a try run of the WPT label Mar 18, 2026

github-actions Bot removed the T-linux-wpt Do a try run of the WPT label Mar 18, 2026

also checks for font-family

e78614d

Signed-off-by: Minghua Wu <michael.wu1107@gmail.com>

servo-highfive added the S-awaiting-review There is new code that needs to be reviewed. label Mar 23, 2026

fix clippy

c842a41

Signed-off-by: Minghua Wu <michael.wu1107@gmail.com>

minghuaw added the T-linux-wpt Do a try run of the WPT label Mar 23, 2026

github-actions Bot removed the T-linux-wpt Do a try run of the WPT label Mar 23, 2026

minghuaw added 2 commits March 23, 2026 17:11

change visibility to private

13bf2dc

Signed-off-by: Minghua Wu <michael.wu1107@gmail.com>

remove success boolean from WebFontLoaded msg

c106581

Signed-off-by: Minghua Wu <michael.wu1107@gmail.com>

minghuaw added the T-linux-wpt Do a try run of the WPT label Mar 23, 2026

github-actions Bot removed the T-linux-wpt Do a try run of the WPT label Mar 23, 2026

minghuaw requested a review from mrobinson March 23, 2026 10:56

mrobinson added the T-linux-wpt Do a try run of the WPT label Mar 23, 2026

github-actions Bot removed the T-linux-wpt Do a try run of the WPT label Mar 23, 2026

minghuaw added 2 commits March 24, 2026 10:33

constrain changes to font filtering

22c1b82

Signed-off-by: Minghua Wu <michael.wu1107@gmail.com>

fix conflict

971f0c2

Signed-off-by: Minghua Wu <michael.wu1107@gmail.com>

minghuaw added the T-linux-wpt Do a try run of the WPT label Mar 24, 2026

github-actions Bot removed the T-linux-wpt Do a try run of the WPT label Mar 24, 2026

mrobinson approved these changes Mar 25, 2026

View reviewed changes

servo-highfive removed the S-awaiting-review There is new code that needs to be reviewed. label Mar 25, 2026

mrobinson added this pull request to the merge queue Mar 25, 2026

servo-highfive added the S-awaiting-merge The PR is in the process of compiling and running tests on the automated CI. label Mar 25, 2026

Merged via the queue into servo:main with commit 13029a9 Mar 25, 2026
70 checks passed

servo-highfive removed the S-awaiting-merge The PR is in the process of compiling and running tests on the automated CI. label Mar 25, 2026

minghuaw deleted the font/dedup-loaded-webfont branch March 26, 2026 01:20

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