Bug 305404

Summary: REGRESSION (iOS 26): [ iOS ] imported/w3c/web-platform-tests/css/css-text-decor/text-emphasis-position-auto-001.html is a flaky image failure
Product: WebKit Reporter: Karl Rackler <rackler>
Component: New BugsAssignee: pascoe <pascoe>
Status: NEW    
Severity: Normal CC: webkit-bot-watchers-bugzilla, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Diff
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Actual
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Expected
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testlist
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test-list none

Karl Rackler
Reported 2026-01-13 10:53:14 PST
Created attachment 477984 [details] Diff Description: imported/w3c/web-platform-tests/css/css-text-decor/text-emphasis-position-auto-001.html The test is a flaky image failure on iOS 26 ToT, and since the bring-up. This issue can be reproduced using the command: run-webkit-tests --no-build --no-retry --no-show-results --exit-after-n-failures=1 --expect-pass --iterations=50 --force -f --clobber-old-results --ios-simulator --release --child-processes 1 --test-list ede7249f9b15f3a0.txt History: https://results.webkit.org/?recent=false&suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fcss%2Fcss-text-decor%2Ftext-emphasis-position-auto-001.html&platform=ios Image Diff: *Diff images attached*
Attachments
Diff (8.61 KB, image/png)
2026-01-13 10:53 PST, Karl Rackler 		no flags
Details
Actual (54.75 KB, image/png)
2026-01-13 10:54 PST, Karl Rackler 		no flags
Details
Expected (54.39 KB, image/png)
2026-01-13 10:54 PST, Karl Rackler 		no flags
Details
testlist (172 bytes, text/plain)
2026-01-14 08:03 PST, Karl Rackler 		no flags
Details
test-list (191 bytes, text/plain)
2026-01-16 14:48 PST, Karl Rackler 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Radar WebKit Bug Importer
Comment 1 2026-01-13 10:53:19 PST
<rdar://problem/168079127>
Karl Rackler
Comment 2 2026-01-13 10:54:02 PST
Created attachment 477985 [details] Actual
Karl Rackler
Comment 3 2026-01-13 10:54:23 PST
Created attachment 477986 [details] Expected
EWS
Comment 4 2026-01-13 11:02:08 PST
Test gardening commit 305523@main (f9406d71137b): <https://commits.webkit.org/305523@main> Reviewed commits have been landed. Closing PR #56506 and removing active labels.
Karl Rackler
Comment 5 2026-01-14 08:03:58 PST
Created attachment 478018 [details] testlist
Jonathan Bedard
Comment 6 2026-01-15 15:55:27 PST
Pull request: https://github.com/apple/WebKit/pull/4196
alan
Comment 7 2026-01-16 07:23:43 PST
I can't reproduce this. "run-webkit-tests --no-build --no-retry --no-show-results --exit-after-n-failures=1 --expect-pass --iterations=50 --force -f --clobber-old-results --ios-simulator --release --child-processes 1 --test-list ede7249f9b15f3a0.txt" with the attached test list file always fails at letter-spacing/letter-spacing-205.html (as it is an failure but we are forcing pass).
Karl Rackler
Comment 8 2026-01-16 14:48:08 PST
I was able to reproduce this again with the command: run-webkit-tests --ios-simulator --release --no-retry --force --iterations=1 --iterations 1 --no-retry --force --clobber-old-results --child-processes 1 --child-processes 1 --test-list focused_tests_imported_w3c_web-platform-tests_css_css-text-decor_text-emphasis-position-auto-001_html.txt.
Karl Rackler
Comment 9 2026-01-16 14:48:45 PST
Created attachment 478056 [details] test-list
Karl Rackler
Comment 10 2026-01-16 14:50:28 PST
The neweest reproduction from test run: https://build.webkit.org/#/builders/1693/builds/1288
pascoe@apple.com
Comment 11 2026-03-09 20:32:26 PDT
Pull request: https://github.com/WebKit/WebKit/pull/60244
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