[Gecko Bug 2065425] Don't stretch with indefinite block-size in GenerateFlexItemsForChild. - #62145

[taskcluster 2026-08-22 05:56:37.248Z] Task ID: Zv-ozF6RSS-B8wCYqdhavA
[taskcluster 2026-08-22 05:56:37.248Z] Worker ID: 6963425407670718643
[taskcluster 2026-08-22 05:56:37.248Z] Worker Group: us-east4-a
[taskcluster 2026-08-22 05:56:37.248Z] Worker Node Type: projects/757942385826/machineTypes/n2-standard-4
[taskcluster 2026-08-22 05:56:37.248Z] Worker Pool: proj-wpt/ci
[taskcluster 2026-08-22 05:56:37.248Z] Worker Version: 46.1.0
[taskcluster 2026-08-22 05:56:37.248Z] Public IP: 34.11.19.115
[taskcluster 2026-08-22 05:56:37.248Z] Hostname: proj-wpt-ci-sazozx9ztzufdi-mifwmrw

[taskcluster 2026-08-22 05:56:38.184Z] === Task Starting ===
+ '[' '' ']'
+ '[' -d /etc/profile.d ']'
+ for i in /etc/profile.d/*.sh
+ '[' -r /etc/profile.d/01-locale-fix.sh ']'
+ . /etc/profile.d/01-locale-fix.sh
+++ /usr/bin/locale-check C.UTF-8
++ eval
+ for i in /etc/profile.d/*.sh
+ '[' -r /etc/profile.d/apps-bin-path.sh ']'
+ . /etc/profile.d/apps-bin-path.sh

...(267 lines hidden)...

Failed to read: session.screen0.maxDisableMove
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Failed to read: session.screen0.toolbar.alpha
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Failed to read: session.screen0.toolbar.onhead
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Failed to read: session.screen0.toolbar.placement
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Failed to read: session.screen0.iconbar.mode
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Failed to read: session.screen0.iconbar.alignment
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Failed to read: session.screen0.iconbar.iconWidth
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Failed to read: session.screen0.iconbar.iconTextPadding
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Failed to read: session.screen0.iconbar.usePixmap
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 0:36.63 INFO Identified 1 affected tests
 0:36.63 INFO Using certutil /usr/bin/certutil
 0:36.63 INFO Downloading geckodriver
 0:36.63 INFO Attempting to install webdriver from nightly
 0:37.02 INFO Extracted geckodriver to /home/test/web-platform-tests/_venv3/bin/geckodriver
 0:37.02 INFO Installed b'geckodriver 0.37.1 (75b411853549 2026-08-18 09:18 +0000)'
 0:37.39 INFO Getting profile data from git ref 22598deb7560ad7baef8c8f5082dcfc1e92efd54
 0:37.45 INFO Test prefs downloaded to /home/test/web-platform-tests/_venv3/profiles/22598deb7560ad7baef8c8f5082dcfc1e92efd54/156.0a1
 0:37.45 INFO Downloading OpenH264 plugin
 0:37.74 INFO Downloading openh264.json from git ref 22598deb7560ad7baef8c8f5082dcfc1e92efd54
 0:37.76 INFO Downloading OpenH264 plugin from https://ciscobinary.openh264.org/openh264-linux64-652bdb7719f30b52b08e506645a7322ff1b2cc6f.zip
 0:37.83 INFO OpenH264 plugin installed to /home/test/web-platform-tests/_venv3/browsers/nightly/gmp-gmpopenh264/2.6.0
 0:37.83 INFO Using OpenH264 plugin in /home/test/web-platform-tests/_venv3/browsers/nightly/gmp-gmpopenh264/2.6.0
[1947] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 0:37.88 mozversion INFO application_buildid: 20260821213723
 0:37.88 mozversion INFO application_changeset: ebbc8065667b64de4786095ba78e58da9d2a4a60
 0:37.88 mozversion INFO application_display_name: Firefox Nightly
 0:37.88 mozversion INFO application_id: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
 0:37.88 mozversion INFO application_name: Firefox
 0:37.88 mozversion INFO application_remotingname: firefox-nightly
 0:37.88 mozversion INFO application_repository: https://hg.mozilla.org/mozilla-central
 0:37.88 mozversion INFO application_vendor: Mozilla
 0:37.88 mozversion INFO application_version: 156.0a1
 0:37.88 mozversion INFO platform_buildid: 20260821213723
 0:37.88 mozversion INFO platform_changeset: ebbc8065667b64de4786095ba78e58da9d2a4a60
 0:37.88 mozversion INFO platform_repository: https://hg.mozilla.org/mozilla-central
 0:37.88 mozversion INFO platform_version: 156.0a1
 0:47.33 INFO Installed font: Ahem.ttf
 0:48.17 wptserve INFO Starting http server on http://127.0.0.1:8000
 0:48.20 wptserve INFO Starting http server on http://127.0.0.1:8002
 0:48.30 wptserve INFO Starting https server on https://127.0.0.1:8446
 0:48.30 wptserve INFO Starting http server on http://127.0.0.1:8001
 0:48.31 wptserve INFO Starting http server on http://127.0.0.1:8003
 0:48.32 wptserve INFO Starting http2 server on https://127.0.0.1:9000
 0:48.33 wptserve INFO Starting https server on https://127.0.0.1:8443
 0:48.33 wptserve INFO Starting https server on https://127.0.0.1:8445
 0:48.34 wptserve INFO Starting https server on https://127.0.0.1:8444
 0:48.34 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:48.34 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:48.34 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:48.35 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:48.35 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:48.35 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
mem avail: 14239 of 15806 MiB (90.09%), swap free:    0 of    0 MiB ( 0.00%)
 0:48.41 wptserve INFO Starting WebTransport over HTTP/3 server on 127.0.0.1:11000
 0:48.72 SUITE_START: web-platform-test - running 1 tests
 1:07.17 INFO Using 1 child processes
 1:07.18 INFO Setting up ssl
 1:07.20 certutil Full command: /usr/bin/certutil -N -d /tmp/tmpv7l9arze.mozrunner -f /tmp/tmpv7l9arze.mozrunner/.crtdbpw
certutil b''
 1:07.22 certutil b''
 1:07.22 certutil b'\nCertificate Nickname                                         Trust Attributes\n                                                             SSL,S/MIME,JAR/XPI\n\nweb-platform-tests                                           CT,, \n'
 1:07.22 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmps0awsm55
 1:07.24 INFO Starting runner
 1:07.24 pid:2051 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:2051 [2051] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 1:07.77 pid:2051 1787378451892	Marionette	INFO	Marionette enabled
 1:07.85 pid:2051 1787378451970	Marionette	INFO	Listening on port 35937
Failed to read: session.screen0.titlebar.left
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Failed to read: session.screen0.titlebar.right
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 1:10.28 pid:2051 console.error: services.settings:
 1:10.28 pid:2051   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 1:10.28 pid:2051   Stack:
 1:10.28 pid:2051     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 1:10.28 pid:2051 list@resource://services-settings/Database.sys.mjs:96:13
 1:10.79 TEST_START: /css/css-flexbox/flex-basis-014.html
 1:11.26 TEST_END: Test OK. Subtests passed 6/6. Unexpected 0
 1:11.26 INFO No more tests
 1:11.26 pid:2051 1787378455381	Marionette	INFO	Stopped listening on port 35937
 1:11.74 INFO Browser exited with return code 0
 1:11.57 INFO Closing logging queue
 1:11.57 INFO queue closed
 1:11.75 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 7 checks (6 subtests, 1 tests)
Expected results: 7
Unexpected results: 0
OK
 1:11.75 INFO Got 0 unexpected results, with 0 unexpected passes
 1:11.75 wptserve INFO Stopped http server on 127.0.0.1:8000
 1:11.75 wptserve INFO Stopped http server on 127.0.0.1:8002
 1:11.75 wptserve INFO Stopped http server on 127.0.0.1:8001
 1:11.76 wptserve INFO Stopped http server on 127.0.0.1:8003
 1:11.76 wptserve INFO Stopped http server on 127.0.0.1:8446
 1:11.76 wptserve INFO Stopped http server on 127.0.0.1:8444
 1:11.78 wptserve INFO Stopped http server on 127.0.0.1:9000
 1:11.78 wptserve INFO Stopped http server on 127.0.0.1:8445
 1:11.78 wptserve INFO Stopped http server on 127.0.0.1:8443
 1:11.78 wptserve INFO Stopped WebTransport over HTTP/3 server on 127.0.0.1:11000
 1:12.25 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:12.25 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:12.29 INFO Removed font: Ahem.ttf
 1:12.31 INFO Closing logging queue
 1:12.32 INFO queue closed
[taskcluster 2026-08-22 06:00:58.948Z] === Task Finished ===
[taskcluster 2026-08-22 06:00:59.863Z] Successful task run with exit code: 0 completed in 262.615 seconds