Bug 271770 – imported/w3c/web-platform-tests/xhr/setrequestheader-case-insensitive.htm is a flaky failure

• Component: Tools / Tests
• Status: NEW

[Jay Stfleur]

Description:
imported/w3c/web-platform-tests/xhr/setrequestheader-case-insensitive.htm

Is a consistent failure after test expectation was removed on 274826@main, test continued to fail after.


History:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fxhr%2Fsetrequestheader-case-insensitive.htm&platform=mac&flavor=wk1&

Diff/Image Diff/Crash Log:
--- /Volumes/Data/worker/Apple-Sonoma-Debug-AppleSilicon-WK1-Tests/build/layout-test-results/imported/w3c/web-platform-tests/xhr/setrequestheader-case-insensitive-expected.txt
+++ /Volumes/Data/worker/Apple-Sonoma-Debug-AppleSilicon-WK1-Tests/build/layout-test-results/imported/w3c/web-platform-tests/xhr/setrequestheader-case-insensitive-actual.txt
@@ -1,4 +1,4 @@
 
 PASS XMLHttpRequest: setRequestHeader() - headers that differ in case
-FAIL XMLHttpRequest: setRequestHeader() - headers that differ in case 1 assert_regexp_match: expected object "/content-TYPE/" but got "Host: localhost:8800\nContent-Type: x/x\nConnection: keep-alive\nTHIS-IS-A-TEST: 1, 2\nAccept: */*\nUser-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)\nReferer: http://localhost:8800/xhr/setrequestheader-case-insensitive.htm\nAccept-Language: en-US,en;q=0.9\nAccept-Encoding: gzip, deflate\n\n"
+FAIL XMLHttpRequest: setRequestHeader() - headers that differ in case 1 assert_regexp_match: expected object "/content-TYPE/" but got "Host: localhost:8800\nContent-Type: x/x\nConnection: keep-alive\nTHIS-IS-A-TEST: 1, 2\nAccept: */*\nUser-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko)\nReferer: http://localhost:8800/xhr/setrequestheader-case-insensitive.htm\nAccept-Language: en\nAccept-Encoding: gzip, deflate\n\n"

[Radar WebKit Bug Importer]

<rdar://problem/125494602>

[Dawn Morningstar]

This is flaky on iOS too

[Alexey Proskuryakov]

I'm not sure why the failure expectation for the test was removed as part of the change, it seems unrelated to me. The test was failing before that, too.

The difference here is in Accept-Language header field, which is very much not something I'd expect.

Is this reproducible locally? Could be leaking state from some preceding test. Seems worth investigating.

[EWS]

Test gardening commit 278836@main (1b89fed26859): <https://commits.webkit.org/278836@main>

Reviewed commits have been landed. Closing PR #28629 and removing active labels.