Filed by: nbeleuzu [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=398536266&repo=mozilla-central
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/OaRKC6rwQVeWm3H3IfiU1g/runs/0/artifacts/public/logs/live_backing.log

[task 2022-12-03T10:16:47.654Z] 10:16:47     INFO - TEST-PASS | netwerk/test/browser/browser_103_assets.js | test_103_asset_normal (font): unexpected amount of normal request made expected 1 ({"hinted":0,"normal":1}), got 1 ({"hinted":0,"normal":1}) - true == true - 
[task 2022-12-03T10:16:47.663Z] 10:16:47     INFO - Console message: [JavaScript Error: "downloadable font: rejected by sanitizer (font-family: "preloadFont" style:normal weight:400 stretch:100 src index:0) source: https://example.com/browser/netwerk/test/browser/early_hint_asset.sjs?as=font&uuid={2f33649a-e69f-4a15-bc01-7288a197fb8e}"]
[task 2022-12-03T10:16:47.664Z] 10:16:47     INFO - Buffered messages finished
[task 2022-12-03T10:16:47.666Z] 10:16:47     INFO - TEST-UNEXPECTED-FAIL | netwerk/test/browser/browser_103_assets.js | test_103_asset_hinted (font): unexpected amount of hinted request made expected 1 ({"hinted":1,"normal":0}), got 0 ({"hinted":0,"normal":1}) - false == true - JS frame :: resource://testing-common/early_hint_preload_test_helper.jsm :: request_count_checking :: line 27
[task 2022-12-03T10:16:47.667Z] 10:16:47     INFO - Stack trace:
[task 2022-12-03T10:16:47.668Z] 10:16:47     INFO - resource://testing-common/early_hint_preload_test_helper.jsm:request_count_checking:27
[task 2022-12-03T10:16:47.669Z] 10:16:47     INFO - chrome://mochitests/content/browser/netwerk/test/browser/browser_103_assets.js:test_hint_asset:41
[task 2022-12-03T10:16:47.670Z] 10:16:47     INFO - Not taking screenshot here: see the one that was previously logged
[task 2022-12-03T10:16:47.672Z] 10:16:47     INFO - TEST-UNEXPECTED-FAIL | netwerk/test/browser/browser_103_assets.js | test_103_asset_hinted (font): unexpected amount of normal request made expected 0 ({"hinted":1,"normal":0}), got 1 ({"hinted":0,"normal":1}) - false == true - JS frame :: resource://testing-common/early_hint_preload_test_helper.jsm :: request_count_checking :: line 34
[task 2022-12-03T10:16:47.673Z] 10:16:47     INFO - Stack trace:
[task 2022-12-03T10:16:47.674Z] 10:16:47     INFO - resource://testing-common/early_hint_preload_test_helper.jsm:request_count_checking:34
[task 2022-12-03T10:16:47.675Z] 10:16:47     INFO - chrome://mochitests/content/browser/netwerk/test/browser/browser_103_assets.js:test_hint_asset:41
[task 2022-12-03T10:16:47.676Z] 10:16:47     INFO - Leaving test bound test_103_asset_font
[task 2022-12-03T10:16:47.677Z] 10:16:47     INFO - Entering test bound test_103_asset_fetch

:manuel, since you are the author of the regressor, bug 1771867, could you take a look?

For more information, please visit auto_nag documentation.

Set release status flags based on info from the regressing bug 1771867

The data race is happening, because nsHttpTransaction::ParseLineSegment
can be called before nsHttpTransaction::AsyncRead. Initializing it in
nsHttpTransaction::Init removes the race condition.

Should fix most early hint intermittent:

• Bug 1744028
• Bug 1746324
• Bug 1760124
• Bug 1775763
• Bug 1803884

Set release status flags based on info from the regressing bug 1771867

Backed out changeset 40b60e5f1d72 (Bug 1803884) for causing mass failures on Linux webrender CLOSED TREE

Push range with all the failures: https://treeherder.mozilla.org/jobs?repo=autoland&group_state=expanded&collapsedPushes=1155668&resultStatus=testfailed%2Cbusted%2Cexception%2Cretry%2Cusercancel&searchStr=linux%2C18.04%2Cx64%2Cwebrender%2Ctsan%2Copt&fromchange=1b3d211c35998c7a277d40b8a01c242e45a1223a&tochange=734d03776a9c83937ce61fedd6ef4dc0555546f3

Log: https://treeherder.mozilla.org/logviewer?job_id=399909113&repo=autoland&lineNumber=1784
https://treeherder.mozilla.org/logviewer?job_id=399908066&repo=autoland&lineNumber=4624
https://treeherder.mozilla.org/logviewer?job_id=399908146&repo=autoland&lineNumber=3172
https://treeherder.mozilla.org/logviewer?job_id=399909537&repo=autoland&lineNumber=3233
https://treeherder.mozilla.org/logviewer?job_id=399908356&repo=autoland&lineNumber=5518

Backout: https://hg.mozilla.org/integration/autoland/rev/5acaf0150cc406d392c249afd5eafba70943bb6e

https://hg.mozilla.org/mozilla-central/rev/b816f9b676bb

The patch landed in nightly and beta is affected.
:manuel, is this bug important enough to require an uplift?

• If yes, please nominate the patch for beta approval.
• If no, please set status-firefox109 to wontfix.

For more information, please visit auto_nag documentation.

This only affects testing, so no need to uplift.