layout: Properly set IS_BLEND_CONTAINER when creating WebRender stacking contexts by mrobinson · Pull Request #45624 · servo/servo

mrobinson · 2026-06-12T16:09:02Z

In order to properly support mix-blend-mode stacking contexts that are
parents of child stacking contexts with mix-blend-mode in their style
need to be marked with the is IS_BLEND_CONTAINER StackingContextFlag.
In addition to correcting the display of mix-blend-mode content, this
also works around an issue where mix-blend-mode was causing a panic
when combined with a particular transform.

This change also works around a variety of WebRender bugs that happen when
mix-blend-mode is used near the root stacking context.

Testing: This change updates test results and also adds a WPT crash test.
Fixes: #42292.

servo-wpt-sync · 2026-06-12T16:17:24Z

🤖 Opened new upstream WPT pull request (web-platform-tests/wpt#60589) with upstreamable changes.

github-actions · 2026-06-12T20:13:17Z

🔨 Triggering try run (#27440391256) for Linux (WPT)

github-actions · 2026-06-12T20:43:36Z

Test results for linux-wpt from try job (#27440391256):

Flaky unexpected result (58)

OK /IndexedDB/transaction-create_in_versionchange.any.html (#44200)

FAIL [expected PASS] subtest: Attempt to create new transactions inside a versionchange transaction

assert_array_equals: events expected property 4 to be "open_rq.success: [object IDBDatabase]" but got "complete_count.success: 2" (expected array ["versionchange_add.success: 1", "versionchange_count.success: 0", "versionchange_add2.success: 2", "versionchange_txn.complete", "open_rq.success: [object IDBDatabase]", "complete_count.success: 2", "complete2_get.success: 1"] got ["versionchange_add.success: 1", "versionchange_count.success: 0", "versionchange_add2.success: 2", "versionchange_txn.complete", "complete_count.success: 2", "open_rq.success: [object IDBDatabase]", "complete2_get.success: 1"])

OK /_webgl/conformance/textures/misc/texture-upload-size.html (#21770)

FAIL [expected PASS] subtest: WebGL test #45

assert_true: Texture was smaller than the expected size 2x2 expected true got false

FAIL [expected PASS] subtest: WebGL test #47

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 #49

assert_true: Texture was smaller than the expected size 2x2 expected true got false

FAIL [expected PASS] subtest: WebGL test #51

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 #53
PASS [expected FAIL] subtest: WebGL test #55
PASS [expected FAIL] subtest: WebGL test #57
PASS [expected FAIL] subtest: WebGL test #59

FAIL [expected PASS] subtest: WebGL test #61

assert_true: Texture was smaller than the expected size 2x2 expected true got false

FAIL [expected PASS] subtest: WebGL test #63

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

And 30 more unexpected results...

FAIL [expected PASS] /css/css-backgrounds/background-size-042.html
PASS [expected FAIL] /css/css-fonts/font-feature-settings-descriptor-01.html (#45418)
OK /dom/nodes/moveBefore/iframe-document-preserve.window.html (#43152)
- FAIL [expected PASS] subtest: moveBefore(): cross-origin iframe is preserved: remove self via innerHTML
```
assert_equals: iframe does not fire a second load event expected 1 but got 0
```
OK [expected TIMEOUT] /fetch/api/redirect/redirect-keepalive.https.any.html (#32153)
- PASS [expected TIMEOUT] subtest: [keepalive][iframe][load] mixed content redirect; setting up
OK [expected ERROR] /fetch/fetch-later/quota/same-origin-iframe/sandboxed-iframe.https.window.html (#41704)
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
```
- FAIL [expected PASS] subtest: content sec-fetch-site - Cross-Site -> Cross-Site
```
assert_unreached: Reached unreachable code
```
OK /html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin-fragment.html (#20768)
- FAIL [expected PASS] subtest: Tests that a fragment navigation in the unload handler will not block the initial navigation
```
assert_equals: expected "" but got "#fragment"
```

OK [expected TIMEOUT] /html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit-button-click.html (#44099)

FAIL [expected TIMEOUT] subtest: Replace before load, triggered by submitButton.click()

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%20form%20%3D%20document.createElement(%22form%22)%3B%0A%20%20%20%20form.action%20%3D%20%22%2Fcommon%2Fblank.html%22%3B%0A%0A%20%20%20%20const%20input%20%3D%20document.createElement(%22input%22)%3B%0A%20%20%20%20input.type%20%3D%20%22hidden%22%3B%0A%20%20%20%20input.name%20%3D%20%22thereplacement%22%3B%0A%20%20%20%20form.append(input)%3B%0A%0A%20%20%20%20const%20button%20%3D%20document.createElement(%22button%22)%3B%0A%20%20%20%20button.type%20%3D%20%22submit%22%3B%0A%20%20%20%20form.append(button)%3B%0A%0A%20%20%20%20document.currentScript.before(form)%3B%0A%20%20%20%20button.click()%3B%0A%20%20"

OK /html/browsers/history/the-history-interface/traverse_the_history_2.html (#21383)
- PASS [expected FAIL] subtest: Multiple history traversals, last would be aborted
OK /html/browsers/history/the-history-interface/traverse_the_history_3.html (#21383)
- PASS [expected FAIL] subtest: Multiple history traversals, last would be aborted
CRASH [expected OK] /html/browsers/history/the-location-interface/location-ancestor-origins-referrerpolicy-snapshot.html
TIMEOUT [expected OK] /html/interaction/focus/the-autofocus-attribute/autofocus-dialog.html (#29087)
- TIMEOUT [expected FAIL] subtest: <dialog>-contained autofocus element gets focused when the dialog is shown
```
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/module/dynamic-import/blob-url.any.html (#33948)
- FAIL [expected PASS] subtest: Revoking a blob URL immediately after calling import will not fail
```
promise_test: Unhandled rejection with value: object "TypeError: Module fetching failed"
```
OK /html/semantics/scripting-1/the-script-element/module/dynamic-import/blob-url.any.worker.html (#33909)
- FAIL [expected PASS] subtest: Revoking a blob URL immediately after calling import will not fail
```
promise_test: Unhandled rejection with value: object "TypeError: Module fetching failed"
```
TIMEOUT [expected OK] /html/syntax/parsing/html5lib_write_single.html?file=tables01
- TIMEOUT [expected PASS] subtest: <table><th>
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <table><td>
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <table><col foo='bar'>
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <table><colgroup></html>foo
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <table></table><p>foo
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <table></body></caption></col></colgroup></html></tbody></td></tfoot></th></thead></tr><td>
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <table><select><option>3</select></table>
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <table><select><table></table></select></table>
```
Test timed out
```
- NOTRUN [expected PASS] subtest: <table><select></table>
- NOTRUN [expected PASS] subtest: <table><select><option>A<tr><td>B</td></tr></table>
- And 9 more unexpected results...
OK /html/webappapis/dynamic-markup-insertion/document-write/iframe_005.html (#43671)
- PASS [expected FAIL] subtest: document.write external script into iframe write back into parent
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?01-05 (#38975)
- PASS [expected TIMEOUT] subtest: Navigate a window via anchor with javascript:-urls in report-only mode.
- PASS [expected NOTRUN] subtest: Navigate a window via anchor with javascript:-urls w/ default policy in report-only mode.
- PASS [expected NOTRUN] subtest: Navigate a frame via anchor with javascript:-urls in enforcing mode.
OK [expected TIMEOUT] /trusted-types/trusted-types-navigation.html?11-15 (#44834)
- PASS [expected TIMEOUT] subtest: Navigate a window via area with javascript:-urls in report-only mode.
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.
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.
TIMEOUT [expected OK] /visual-viewport/resize-event-order.html (#41981)
- TIMEOUT [expected FAIL] subtest: Popup: DOMWindow resize fired before VisualViewport.
```
Test timed out
```
- NOTRUN [expected PASS] subtest: iframe: DOMWindow resize fired before VisualViewport.

OK /webdriver/tests/classic/perform_actions/wheel_events.py

FAIL [expected PASS] subtest: test_scroll_on_iframe_with_overflow_scroll[delta-x]

webdriver.error.TimeoutException: timeout (500): Timed out after 0.5 seconds with message: Didn't receive all events: expected at least 1, got 0

TIMEOUT [expected OK] /webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.html (#29053)
- TIMEOUT [expected FAIL] subtest: StorageKey: test 3P about:blank window opened from a 3P iframe
```
Test timed out
```
CRASH [expected ERROR] /workers/Worker-base64.any.sharedworker.html
CRASH [expected OK] /workers/Worker-creation-happens-in-parallel.https.html
CRASH [expected OK] /workers/Worker-multi-port.html
CRASH [expected ERROR] /workers/Worker-replace-self.any.sharedworker.html
CRASH [expected OK] /workers/WorkerGlobalScope_ErrorEvent_colno.htm
CRASH [expected OK] /workers/WorkerGlobalScope_ErrorEvent_lineno.htm
CRASH [expected OK] /workers/WorkerGlobalScope_requestAnimationFrame.worker.html
CRASH [expected OK] /workers/baseurl/alpha/importScripts-in-sharedworker.html
CRASH [expected OK] /workers/constructors/SharedWorker/empty-name.html
CRASH [expected OK] /workers/constructors/SharedWorker/unresolvable-url.html
CRASH [expected OK] /workers/constructors/Worker/ctor-undefined.html
CRASH [expected OK] /workers/dedicated-worker-from-blob-url.window.html (#22286)
CRASH [expected OK] /workers/dedicated-worker-parse-error-failure.html
CRASH [expected ERROR] /workers/examples/general.any.serviceworker.html
CRASH [expected OK] /workers/examples/general.worker.html
CRASH [expected ERROR] /workers/importscripts_mime.any.serviceworker.html
CRASH [expected OK] /workers/interfaces/DedicatedWorkerGlobalScope/EventTarget.worker.html
CRASH [expected OK] /workers/interfaces/DedicatedWorkerGlobalScope/postMessage/structured-clone-message.html
CRASH [expected OK] /workers/interfaces/WorkerGlobalScope/location/redirect-module.html
CRASH [expected ERROR] /workers/interfaces/WorkerGlobalScope/location/returns-same-object.any.sharedworker.html
CRASH [expected OK] /workers/interfaces/WorkerGlobalScope/onerror/exception-in-onerror.html
CRASH [expected TIMEOUT] /workers/interfaces/WorkerGlobalScope/onerror/message-classic-Error.html
CRASH [expected OK] /workers/interfaces/WorkerUtils/importScripts/003.html
CRASH [expected ERROR] /workers/interfaces/WorkerUtils/importScripts/report-error-redirect-to-cross-origin.sub.any.sharedworker.html
CRASH [expected OK] /workers/interfaces/WorkerUtils/navigator/002.html
CRASH [expected OK] /workers/modules/dedicated-worker-import-data-url-cross-origin.html
CRASH [expected OK] /workers/modules/shared-worker-import-failure.html
CRASH [expected OK] /workers/nested_worker_importScripts.worker.html
CRASH [expected OK] /xhr/access-control-basic-allow-non-cors-safelisted-method.any.worker.html
CRASH [expected OK] /xhr/access-control-basic-allow.any.worker.html

Stable unexpected results that are known to be intermittent (12)

OK /beacon/beacon-basic.https.window.html (#41723)
- FAIL [expected PASS] subtest: Payload size restriction should be accumulated: type = arraybuffer
```
assert_false: expected false got true
```
TIMEOUT [expected OK] /content-security-policy/inheritance/auxiliary-blank-document.html (#44821)
- TIMEOUT [expected PASS] subtest: window.open() inherits CSPs on transient about:blank.
```
Test timed out
```
OK [expected CRASH] /content-security-policy/meta/sandbox-iframe.html (#43478)
- FAIL [expected PASS] subtest: img-src 'self' works when specified in a meta tag.
```
assert_equals: expected "PASS" but got "FAIL"
```
OK /html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html (#28697)
- PASS [expected FAIL] subtest: aElement.click() before the load event must NOT replace
TIMEOUT [expected OK] /html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit.html (#44028)
OK /html/browsers/history/the-history-interface/traverse_the_history_4.html (#21383)
- PASS [expected FAIL] subtest: Multiple history traversals, last would be aborted
OK [expected TIMEOUT] /html/infrastructure/urls/base-url/document-base-url-window-initiator-is-not-opener.https.window.html (#30970)
TIMEOUT [expected OK] /html/user-activation/navigation-state-reset-sameorigin.html (#45151)
- TIMEOUT [expected PASS] subtest: Post-navigation state reset.
```
Test timed out
```

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 /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)
- PASS [expected FAIL] subtest: Click event should be fired when touchend opens synchronous XHR
TIMEOUT [expected OK] /trusted-types/trusted-types-navigation.html?16-20 (#44835)
- TIMEOUT [expected PASS] subtest: Navigate a frame via area with javascript:-urls w/ default policy in enforcing mode.
```
Test timed out
```
- NOTRUN [expected PASS] subtest: Navigate a frame via area with javascript:-urls in report-only mode.
- NOTRUN [expected PASS] subtest: Navigate a frame via area with javascript:-urls w/ default policy in report-only mode.

github-actions · 2026-06-12T20:43:45Z

✨ Try run (#27440391256) succeeded.

servo-wpt-sync · 2026-06-28T14:08:38Z

✍ Updated existing upstream WPT pull request (web-platform-tests/wpt#60589) title and body.

servo-wpt-sync · 2026-06-28T14:10:16Z

✍ Updated existing upstream WPT pull request (web-platform-tests/wpt#60589) title and body.

…ing contexts In order to properly support `mix-blend-mode` stacking contexts that are parents of child stacking contexts with `mix-blend-mode` in their style need to be marked with the is `IS_BLEND_CONTAINER` StackingContextFlag. In addition to correcting the display of `mix-blend-mode` content, this also work around an issue where `mix-blend-mode` was causing a panic when combined with a particular transform. This also works around a variety of WebRender bugs that happen when `mix-blend-mode` is used near the root stacking context. Signed-off-by: Martin Robinson <[email protected]>

github-actions · 2026-07-29T04:26:46Z

🔨 Triggering try run (#30422279283) for Linux (WPT)

servo-wpt-sync · 2026-07-29T04:30:47Z

📝 Transplanted new upstreamable changes to existing upstream WPT pull request (web-platform-tests/wpt#60589).

github-actions · 2026-07-29T04:58:18Z

Test results for linux-wpt from try job (#30422279283):

Flaky unexpected result (40)

TIMEOUT [expected OK] /IndexedDB/idbfactory-origin-isolation.html
- TIMEOUT [expected PASS] subtest: Test to make sure that origins have separate locking schemes
```
Test timed out
```

OK /_webgl/conformance/textures/misc/texture-upload-size.html (#21770)

FAIL [expected PASS] subtest: WebGL test #45

assert_true: Texture was smaller than the expected size 2x2 expected true got false

FAIL [expected PASS] subtest: WebGL test #47

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 #49

assert_true: Texture was smaller than the expected size 2x2 expected true got false

FAIL [expected PASS] subtest: WebGL test #51

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 #53
PASS [expected FAIL] subtest: WebGL test #55
PASS [expected FAIL] subtest: WebGL test #57
PASS [expected FAIL] subtest: WebGL test #59

FAIL [expected PASS] subtest: WebGL test #61

assert_true: Texture was smaller than the expected size 2x2 expected true got false

FAIL [expected PASS] subtest: WebGL test #63

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

And 6 more unexpected results...

CRASH [expected OK] /_webgl/conformance/uniforms/no-over-optimization-on-uniform-array-14.html
TIMEOUT [expected OK] /cookies/attributes/domain.sub.html
- TIMEOUT [expected FAIL] subtest: Empty domain treated as host cookie 2
```
Test timed out
```
- NOTRUN [expected PASS] subtest: Empty domain treated as host cookie 3
- NOTRUN [expected PASS] subtest: No host cookies returned for host cookies after non-host redirect 1
- NOTRUN [expected PASS] subtest: No host cookies returned for host cookies after non-host redirect 2
- NOTRUN [expected PASS] subtest: No host cookies returned for host cookies after non-host redirect 3
OK /cookies/partitioned-cookies/partitioned-cookies-samesite-attribute.https.html (#45255)
- FAIL [expected PASS] subtest: In embedded cross-site contexts, partitioned cookies can only be set with explicit SameSite=None
```
assert_equals: expected 0 but got 3
```
TIMEOUT [expected OK] /css/compositing/canvas-composite-modes.html
FAIL [expected PASS] /css/css-backgrounds/background-size-042.html
OK /css/css-fonts/variations/at-font-face-font-matching.html (#20684)
- FAIL [expected PASS] subtest: Matching font-weight: '500' should prefer '350 399' over '351 398'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
- FAIL [expected PASS] subtest: Matching font-style: 'oblique -10deg' should prefer 'oblique -50deg -40deg' over 'oblique 0deg 10deg'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
- FAIL [expected PASS] subtest: Matching font-style: 'oblique -20deg' should prefer 'oblique -60deg -40deg' over 'oblique -10deg'
```
assert_equals: Unexpected font on test element expected 487 but got 532
```
TIMEOUT [expected CRASH] /editing/whitespaces/chrome-compat/inserttext.tentative.html
TIMEOUT [expected OK] /fetch/content-encoding/br/big-br-body.https.any.html
- TIMEOUT [expected PASS] subtest: large br data should be decompressed successfully
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: large br data should be decompressed successfully with byte stream
TIMEOUT [expected OK] /fetch/content-encoding/zstd/big-zstd-body.https.any.html
OK /fetch/content-length/api-and-duplicate-headers.any.worker.html (#35197)
- FAIL [expected PASS] subtest: fetch() and duplicate Content-Length/Content-Type headers
```
promise_test: Unhandled rejection with value: object "TypeError: Network error: HTTP failure: client error (SendRequest)"
```
OK [expected ERROR] /fetch/fetch-later/quota/same-origin-iframe/accumulated-oversized-payload.https.window.html (#41705)
OK /html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.html (#29056)
- FAIL [expected PASS] subtest: Cross-origin navigation started from unload handler must be ignored
```
promise_test: Unhandled rejection with value: object "SecurityError: The operation is insecure."
```

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"

TIMEOUT [expected OK] /html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/form-submit.html (#44028)
OK /html/browsers/history/the-history-interface/traverse_the_history_5.html (#21383)
- PASS [expected FAIL] subtest: Multiple history traversals, last would be aborted
CRASH [expected ERROR] /html/browsers/history/the-location-interface/location_replace_session_history.html (#41896)
CRASH [expected OK] /html/browsers/sandboxing/sandbox-initial-empty-document-toward-same-origin.html (#35948)
OK /html/browsers/windows/embedded-opener-remove-frame.html (#23867)
- PASS [expected FAIL] subtest: opener of discarded auxiliary browsing context
ERROR [expected OK] /html/infrastructure/urls/base-url/base-url-javascript-nav.https.window.html
TIMEOUT [expected OK] /html/interaction/focus/the-autofocus-attribute/supported-elements.html (#24145)
- TIMEOUT [expected PASS] subtest: Non-HTMLElement should not support autofocus
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: Host element with delegatesFocus should support autofocus
- NOTRUN [expected FAIL] subtest: Host element with delegatesFocus including no focusable descendants should be skipped
- NOTRUN [expected FAIL] subtest: Area element should support autofocus
OK /html/semantics/embedded-content/the-iframe-element/iframe-loading-lazy-reload-location-reload.html (#32595)
- FAIL [expected PASS] subtest: Reloading iframe loading='lazy' before it is loaded: location.reload
```
uncaught exception: Error: assert_equals: expected "http://web-platform.test:8000/html/semantics/embedded-content/the-iframe-element/support/blank.htm?src" but got "about:blank"
```

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 /html/semantics/scripting-1/the-script-element/module/choice-of-error-1.html (#44058)
- PASS [expected FAIL] subtest: Parse errors in different files should be reported depending on different roots
TIMEOUT [expected OK] /html/user-activation/navigation-state-reset-sameorigin.html (#45151)
- TIMEOUT [expected FAIL] subtest: Post-navigation state reset.
```
Test timed out
```
OK /infrastructure/testdriver/click_iframe.html
- FAIL [expected PASS] subtest: TestDriver click on a document in an iframe
```
Unhandled rejection: assert_unreached: click failed Reached unreachable code
```
TIMEOUT [expected OK] /pointerevents/compat/pointerevent_touch-action_two-finger_interaction.html (#44693)
- NOTRUN [expected PASS] subtest: touch two-finger pan on 'touch-action: pan-x pan-y'
- NOTRUN [expected FAIL] subtest: touch two-finger pan on 'touch-action: pinch-zoom'
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 /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 /sanitizer-api/sanitizer-inert-document.html (#45260)
- FAIL [expected PASS] subtest: Test whether setHTML loads the image.
```
promise_test: Unhandled rejection with value: "The server observed a request. It shouldn't have."
```
- PASS [expected FAIL] subtest: Test whether setHTMLUnsafe loads the image.
OK /touch-events/hover-state-caused-by-compatibility-mouse-events.tentative.html (#46277)
- PASS [expected FAIL] subtest: The compatibility mouse events should set :hover, but shouldn't be preserved after the target is replaced: The compatibility mouse events should be fired
CRASH [expected OK] /trusted-types/TrustedTypePolicyFactory-createPolicy-unenforced.html
OK [expected TIMEOUT] /trusted-types/trusted-types-navigation.html?01-05 (#38975)
- PASS [expected TIMEOUT] subtest: Navigate a window via anchor with javascript:-urls in report-only mode.
- PASS [expected NOTRUN] subtest: Navigate a window via anchor with javascript:-urls w/ default policy in report-only mode.
- PASS [expected NOTRUN] 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
```
OK /upgrade-insecure-requests/gen/sharedworker-classic-data.meta/upgrade/websocket.https.html
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects allowed for websocket to cross-ws-downgrade origin and no-redirect redirection from https context.
```
assert_equals: The resource request should be 'allowed'. expected "allowed" but got "blocked"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects allowed for websocket to same-ws-downgrade origin and no-redirect redirection from https context.
```
assert_equals: The resource request should be 'allowed'. expected "allowed" but got "blocked"
```
OK /upgrade-insecure-requests/gen/sharedworker-module-data.meta/unset/fetch.https.html
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects blocked for fetch to cross-http-downgrade origin and downgrade redirection from https context.
```
assert_equals: The resource request should be 'blocked'. expected "blocked" but got "allowed"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects blocked for fetch to cross-http-downgrade origin and no-redirect redirection from https context.
```
assert_equals: The resource request should be 'blocked'. expected "blocked" but got "allowed"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects blocked for fetch to cross-https origin and downgrade redirection from https context.
```
assert_equals: The resource request should be 'blocked'. expected "blocked" but got "allowed"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects blocked for fetch to same-http-downgrade origin and downgrade redirection from https context.
```
assert_equals: The resource request should be 'blocked'. expected "blocked" but got "allowed"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects blocked for fetch to same-http-downgrade origin and no-redirect redirection from https context.
```
assert_equals: The resource request should be 'blocked'. expected "blocked" but got "allowed"
```
- FAIL [expected PASS] subtest: Upgrade-Insecure-Requests: Expects blocked for fetch to same-https origin and downgrade redirection from https context.
```
assert_equals: The resource request should be 'blocked'. expected "blocked" but got "allowed"
```
OK /webdriver/tests/classic/perform_actions/pointer_pen.py
- FAIL [expected PASS] subtest: test_pen_pointer_in_shadow_tree[outer-closed]
```
AssertionError
```
- FAIL [expected PASS] subtest: test_pen_pointer_in_shadow_tree[inner-open]
```
AssertionError
```
- FAIL [expected PASS] subtest: test_pen_pointer_in_shadow_tree[inner-closed]
```
AssertionError
```
TIMEOUT [expected OK] /webstorage/storage_local_quota_independent_from_session.window.html
TIMEOUT [expected OK] /webstorage/storage_session_setitem_quotaexceedederr.window.html

Stable unexpected results that are known to be intermittent (14)

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 /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
```
- PASS [expected FAIL] subtest: Payload size restriction should be accumulated: type = blob
FAIL [expected PASS] /css/css-text-decor/text-underline-position-from-font-variable.html (#45615)
ERROR [expected TIMEOUT] /html/browsers/browsing-the-web/history-traversal/pageswap/pageswap-initial-navigation.html (#40387)
OK /html/browsers/history/the-history-interface/traverse_the_history_4.html (#21383)
- PASS [expected FAIL] subtest: Multiple history traversals, last would be aborted
OK [expected TIMEOUT] /html/interaction/focus/the-autofocus-attribute/autofocus-dialog.html (#29087)
- PASS [expected TIMEOUT] subtest: <dialog>-contained autofocus element gets focused when the dialog is shown
TIMEOUT [expected OK] /html/semantics/embedded-content/media-elements/autoplay-disabled-by-permissions-policy.https.sub.html (#46012, #46804)
- TIMEOUT [expected PASS] subtest: Permissions-Policy header: autoplay "none" has no effect on the top level document.
```
Test timed out
```
OK [expected TIMEOUT] /html/semantics/embedded-content/media-elements/src_object_blob.html (#40340)
- PASS [expected TIMEOUT] subtest: HTMLMediaElement.srcObject blob
TIMEOUT /html/syntax/parsing/html5lib_write.html?file=processing-instructions (#46205)
- TIMEOUT [expected FAIL] subtest: <body><?x>
```
Test timed out
```
- TIMEOUT [expected PASS] subtest: <body><title><?something></title>
```
Test timed out
```
OK /pointerevents/pointerevent_change-touch-action-onpointerdown_touch.html (#46781)
- FAIL [expected PASS] subtest: scroll was received while shouldn't
```
assert_true: scroll received while shouldn't expected true got false
```
OK /resource-timing/test_resource_timing.https.html (#25216)
- PASS [expected FAIL] subtest: PerformanceEntry has correct name, initiatorType, startTime, and duration (xmlhttprequest)
OK [expected TIMEOUT] /trusted-types/trusted-types-navigation.html?06-10 (#37920)
- FAIL [expected PASS] subtest: Navigate a frame via anchor with javascript:-urls in report-only mode.
```
promise_test: Unhandled rejection with value: "Unexpected message received: \"No securitypolicyviolation reported!\""
```
- 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 [expected OK] /trusted-types/trusted-types-navigation.html?16-20 (#44835)
- TIMEOUT [expected PASS] subtest: Navigate a frame via area with javascript:-urls w/ default policy in enforcing mode.
```
Test timed out
```
- NOTRUN [expected FAIL] subtest: Navigate a frame via area with javascript:-urls in report-only mode.
- NOTRUN [expected PASS] subtest: Navigate a frame via area with javascript:-urls w/ default policy in report-only mode.
TIMEOUT [expected OK] /visual-viewport/resize-event-order.html (#41981)
- TIMEOUT [expected FAIL] subtest: Popup: DOMWindow resize fired before VisualViewport.
```
Test timed out
```
- NOTRUN [expected PASS] subtest: iframe: DOMWindow resize fired before VisualViewport.

github-actions · 2026-07-29T04:58:30Z

✨ Try run (#30422279283) succeeded.

Signed-off-by: Martin Robinson <[email protected]>

servo-wpt-sync · 2026-07-29T11:40:07Z

📝 Transplanted new upstreamable changes to existing upstream WPT pull request (web-platform-tests/wpt#60589).

mrobinson · 2026-07-29T15:45:08Z

I've filed https://bugzilla.mozilla.org/show_bug.cgi?id=2058972 upstream for this change.

mrobinson requested a review from Loirooriol as a code owner June 12, 2026 16:09

servo-highfive added the S-awaiting-review There is new code that needs to be reviewed. label Jun 12, 2026

servo-wpt-sync mentioned this pull request Jun 12, 2026

layout: Properly set IS_BLEND_CONTAINER when creating WebRender stacking contexts web-platform-tests/wpt#60589

Merged

mrobinson added the T-linux-wpt Do a try run of the WPT label Jun 12, 2026

github-actions Bot removed the T-linux-wpt Do a try run of the WPT label Jun 12, 2026

servo deleted a comment from goransh-walia Jun 13, 2026

mrobinson force-pushed the set-is-blend-container branch from b8f7694 to 1de889b Compare July 29, 2026 04:26

mrobinson added the T-linux-wpt Do a try run of the WPT label Jul 29, 2026

github-actions Bot removed the T-linux-wpt Do a try run of the WPT label Jul 29, 2026

SimonSapin approved these changes Jul 29, 2026

View reviewed changes

servo-highfive removed the S-awaiting-review There is new code that needs to be reviewed. label Jul 29, 2026

Try to simplify

a2fcf44

Signed-off-by: Martin Robinson <[email protected]>

servo-highfive added the S-awaiting-review There is new code that needs to be reviewed. label Jul 29, 2026

mrobinson enabled auto-merge July 29, 2026 11:36

mrobinson added this pull request to the merge queue Jul 29, 2026

servo-highfive added the S-awaiting-merge The PR is in the process of compiling and running tests on the automated CI. label Jul 29, 2026

Merged via the queue into servo:main with commit 6817164 Jul 29, 2026
36 checks passed

mrobinson deleted the set-is-blend-container branch July 29, 2026 12:30

servo-highfive removed the S-awaiting-merge The PR is in the process of compiling and running tests on the automated CI. label Jul 29, 2026

Navigation Menu

Uh oh!

Uh oh!

layout: Properly set IS_BLEND_CONTAINER when creating WebRender stacking contexts - #45624

layout: Properly set IS_BLEND_CONTAINER when creating WebRender stacking contexts#45624
mrobinson merged 2 commits into
servo:mainfrom
mrobinson:set-is-blend-container

mrobinson commented Jun 12, 2026 •

edited

Loading

Uh oh!

servo-wpt-sync commented Jun 12, 2026

Uh oh!

github-actions Bot commented Jun 12, 2026

Uh oh!

github-actions Bot commented Jun 12, 2026

Uh oh!

github-actions Bot commented Jun 12, 2026

Uh oh!

servo-wpt-sync commented Jun 28, 2026

Uh oh!

servo-wpt-sync commented Jun 28, 2026

Uh oh!

github-actions Bot commented Jul 29, 2026

Uh oh!

servo-wpt-sync commented Jul 29, 2026

Uh oh!

github-actions Bot commented Jul 29, 2026

Uh oh!

github-actions Bot commented Jul 29, 2026

Uh oh!

servo-wpt-sync commented Jul 29, 2026

Uh oh!

Uh oh!

mrobinson commented Jul 29, 2026

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

4 participants

Uh oh!

Uh oh!

Conversation

mrobinson commented Jun 12, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

servo-wpt-sync commented Jun 12, 2026

Uh oh!

github-actions Bot commented Jun 12, 2026

Uh oh!

github-actions Bot commented Jun 12, 2026

Uh oh!

github-actions Bot commented Jun 12, 2026

Uh oh!

servo-wpt-sync commented Jun 28, 2026

Uh oh!

servo-wpt-sync commented Jun 28, 2026

Uh oh!

github-actions Bot commented Jul 29, 2026

Uh oh!

servo-wpt-sync commented Jul 29, 2026

Uh oh!

github-actions Bot commented Jul 29, 2026

Uh oh!

github-actions Bot commented Jul 29, 2026

Uh oh!

servo-wpt-sync commented Jul 29, 2026

Uh oh!

Uh oh!

mrobinson commented Jul 29, 2026

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

4 participants

mrobinson commented Jun 12, 2026 •

edited

Loading