fs: add tests for null WriteParams members throwing TypeError - #58156

[taskcluster 2026-03-01 18:49:45.348Z] Task ID: caCAbnEMSdGrtSQLrrDSUQ
[taskcluster 2026-03-01 18:49:45.348Z] Worker ID: 7096817527040850696
[taskcluster 2026-03-01 18:49:45.348Z] Worker Group: us-east4-a
[taskcluster 2026-03-01 18:49:45.348Z] Worker Node Type: projects/757942385826/machineTypes/n2-standard-4
[taskcluster 2026-03-01 18:49:45.348Z] Worker Pool: proj-wpt/ci
[taskcluster 2026-03-01 18:49:45.348Z] Worker Version: 46.1.0
[taskcluster 2026-03-01 18:49:45.348Z] Public IP: 8.228.112.134
[taskcluster 2026-03-01 18:49:45.348Z] Hostname: proj-wpt-ci-h5m1hbyksfg7vrcpxjuvka

[taskcluster 2026-03-01 18:49:45.993Z] === 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)...

Setting default value
Failed to read: session.screen0.workspacewarping
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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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 0:24.23 INFO Identified 1 affected tests
 0:24.23 INFO Using certutil /usr/bin/certutil
 0:24.23 INFO Downloading geckodriver
 0:24.23 INFO Attempting to install webdriver from nightly
 0:24.59 INFO Extracted geckodriver to /home/test/web-platform-tests/_venv3/bin/geckodriver
 0:24.59 INFO Installed b'geckodriver 0.36.0 (ac66d1c9d3b2 2026-02-26 22:36 +0000)'
 0:28.72 INFO Getting profile data from git ref 3c918058f580ec2cd39d80c9f77ccd06982c0029
 0:28.93 INFO Test prefs downloaded to /home/test/web-platform-tests/_venv3/profiles/3c918058f580ec2cd39d80c9f77ccd06982c0029/150.0a1
[1320] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 0:29.05 mozversion INFO application_buildid: 20260301091022
 0:29.05 mozversion INFO application_changeset: d196b0e15fb423d4e8dea0a6a924664ca6a7248f
 0:29.05 mozversion INFO application_display_name: Firefox Nightly
 0:29.05 mozversion INFO application_id: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
 0:29.05 mozversion INFO application_name: Firefox
 0:29.05 mozversion INFO application_remotingname: firefox-nightly
 0:29.05 mozversion INFO application_repository: https://hg.mozilla.org/mozilla-central
 0:29.05 mozversion INFO application_vendor: Mozilla
 0:29.05 mozversion INFO application_version: 150.0a1
 0:29.05 mozversion INFO platform_buildid: 20260301091022
 0:29.05 mozversion INFO platform_changeset: d196b0e15fb423d4e8dea0a6a924664ca6a7248f
 0:29.06 mozversion INFO platform_repository: https://hg.mozilla.org/mozilla-central
 0:29.06 mozversion INFO platform_version: 150.0a1
 0:34.94 INFO Installed font: Ahem.ttf
 0:35.89 wptserve INFO Starting http server on http://127.0.0.1:8002
 0:35.94 wptserve INFO Starting http server on http://127.0.0.1:8000
 0:35.98 wptserve INFO Starting http2 server on https://127.0.0.1:9000
 0:35.98 wptserve INFO Starting https server on https://127.0.0.1:8443
 0:36.00 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:36.00 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:36.00 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 0:36.00 wptserve INFO Starting http server on http://127.0.0.1:8003
 0:36.02 wptserve INFO Starting http server on http://127.0.0.1:8001
 0:36.02 wptserve INFO Starting https server on https://127.0.0.1:8444
 0:36.02 wptserve INFO Create socket on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:36.02 wptserve INFO Bind on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:36.02 wptserve INFO Listen on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 0:36.03 wptserve INFO Starting https server on https://127.0.0.1:8445
 0:36.04 wptserve INFO Starting https server on https://127.0.0.1:8446
 0:36.12 wptserve INFO Starting WebTransport over HTTP/3 server on 127.0.0.1:11000
 0:36.38 SUITE_START: web-platform-test - running 2 tests
mem avail: 14365 of 15806 MiB (90.88%), swap free:    0 of    0 MiB ( 0.00%)
 0:53.58 INFO Using 1 child processes
 0:53.59 INFO Setting up ssl
 0:53.61 certutil Full command: /usr/bin/certutil -N -d /tmp/tmp0wikiccb.mozrunner -f /tmp/tmp0wikiccb.mozrunner/.crtdbpw
certutil b''
 0:53.64 certutil b''
 0:53.64 certutil b'\nCertificate Nickname                                         Trust Attributes\n                                                             SSL,S/MIME,JAR/XPI\n\nweb-platform-tests                                           CT,, \n'
 0:53.64 INFO Application command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank -profile /tmp/tmpo9w010pi
 0:53.65 INFO Starting runner
 0:53.66 pid:1424 Full command: /home/test/build/firefox/firefox --marionette --remote-allow-system-access about:blank
pid:1424 [1424] Sandbox: CanCreateUserNamespace() clone() failure: EPERM
 0:54.23 pid:1424 1772391167252	Marionette	INFO	Marionette enabled
 0:54.33 pid:1424 1772391167355	Marionette	INFO	Listening on port 56761
Failed to read: session.screen0.titlebar.left
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Failed to read: session.screen0.titlebar.right
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 0:57.20 pid:1424 console.error: services.settings:
 0:57.20 pid:1424   Message: EmptyDatabaseError: "main/nimbus-desktop-experiments" has not been synced yet
 0:57.20 pid:1424   Stack:
 0:57.20 pid:1424     EmptyDatabaseError@resource://services-settings/Database.sys.mjs:19:5
 0:57.20 pid:1424 list@resource://services-settings/Database.sys.mjs:96:13
 0:57.35 pid:1424 console.warn: BackupService: "There was an error while trying to get the Document's directory" [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIProperties.get]"  nsresult: "0x80004005 (NS_ERROR_FAILURE)"  location: "JS frame :: resource:///modules/backup/BackupService.sys.mjs :: get docsDirFolderPath :: line 1204"  data: no]
 0:57.58 TEST_START: /fs/FileSystemWritableFileStream-write.https.any.html
 0:59.80 pid:1424 IPDL protocol Error: Received an invalid file descriptor
 0:59.97 TEST_END: Test OK. Subtests passed 33/33. Unexpected 0
 0:59.98 TEST_START: /fs/FileSystemWritableFileStream-write.https.any.worker.html
 0:59.98 INFO Closing window d58d39ca-a159-4881-9541-5867b95be533
 1:01.63 pid:1424 IPDL protocol Error: Received an invalid file descriptor
 1:01.80 TEST_END: Test OK. Subtests passed 33/33. Unexpected 0
 1:01.80 INFO No more tests
 1:01.80 pid:1424 1772391174826	Marionette	INFO	Stopped listening on port 56761
 1:02.38 pid:1424 [GFX1-]: VideoBridgeParent receives IPC close with reason=AbnormalShutdown
 1:02.44 INFO Browser exited with return code -15
 1:02.29 INFO Closing logging queue
 1:02.29 INFO queue closed
 1:02.46 SUITE_END

web-platform-test
~~~~~~~~~~~~~~~~~
Ran 68 checks (66 subtests, 2 tests)
Expected results: 68
Unexpected results: 0
OK
 1:02.46 INFO Got 0 unexpected results, with 0 unexpected passes
 1:02.46 wptserve INFO Stopped http server on 127.0.0.1:8000
 1:02.46 wptserve INFO Stopped http server on 127.0.0.1:8001
 1:02.48 wptserve INFO Stopped http server on 127.0.0.1:8443
 1:02.48 wptserve INFO Stopped http server on 127.0.0.1:8003
 1:02.48 wptserve INFO Stopped http server on 127.0.0.1:8444
 1:02.48 wptserve INFO Stopped http server on 127.0.0.1:8002
 1:02.48 wptserve INFO Stopped http server on 127.0.0.1:8445
 1:02.48 wptserve INFO Stopped http server on 127.0.0.1:9000
 1:02.48 wptserve INFO Stopped http server on 127.0.0.1:8446
 1:02.49 wptserve INFO Stopped WebTransport over HTTP/3 server on 127.0.0.1:11000
 1:02.91 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8889))
 1:02.92 wptserve INFO Close on: (<AddressFamily.AF_INET: 2>, <SocketKind.SOCK_STREAM: 1>, 6, '', ('127.0.0.1', 8888))
 1:02.96 INFO Removed font: Ahem.ttf
 1:02.99 INFO Closing logging queue
 1:02.99 INFO queue closed
[taskcluster 2026-03-01 18:52:57.960Z] === Task Finished ===
[taskcluster 2026-03-01 18:52:58.898Z] Successful task run with exit code: 0 completed in 193.55 seconds