Bug 302901 – [iOS] imported/w3c/web-platform-tests/fetch/security/dangling-markup-mitigation-data-url.tentative.sub.html is a flaky failure

• Status: RESOLVED
• Resolution: FIXED
• Component: New Bugs

[Marta Darbinyan]

The following test is constantly failing on iOS26 after OS upgrade on Opensource.
imported/w3c/web-platform-tests/fetch/security/dangling-markup-mitigation-data-url.tentative.sub.html

 PASS <img id="dangling" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII=">
-FAIL <img id="dangling" src="data:image/png;base64,&#10;iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII="> assert_equals: Height expected 1 but got 0
-FAIL <img id="dangling" src="data:image/png;base64,i&#10;VBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII="> assert_equals: Height expected 1 but got 0
+PASS <img id="dangling" src="data:image/png;base64,&#10;iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII=">
+PASS <img id="dangling" src="data:image/png;base64,i&#10;VBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII=">
 PASS <img id="dangling" src="data:image/svg+xml;utf8,\n      <svg width='1' height='1' xmlns='http://www.w3.org/2000/svg'>\n        <rect width='100%' height='100%' fill='rebeccapurple'/>\n        <rect x='10%' y='10%' width='80%' height='80%' fill='lightgreen'/>\n      </svg>">
 PASS <iframe id="dangling"\n        src="data:text/html,\n            <img\n              onload='window.parent.postMessage(&quot;loaded&quot;, &quot;*&quot;);'\n              onerror='window.parent.postMessage(&quot;error&quot;, &quot;*&quot;);'\n              src='http://web-platform.test:8800/images/gr&#10;een-256x256.png'>\n        ">\n     </iframe>
 PASS <iframe id="dangling"\n        src="data:text/html,\n            <img\n              onload='window.parent.postMessage(&quot;loaded&quot;, &quot;*&quot;);'\n              onerror='window.parent.postMessage(&quot;error&quot;, &quot;*&quo

Test history:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Ffetch%2Fsecurity%2Fdangling-markup-mitigation-data-url.tentative.sub.html&platform=ios

Test result:
https://ews-build.webkit.org/#/builders/154/builds/2868

[Radar WebKit Bug Importer]

<rdar://problem/165165272>

[EWS]

Test gardening commit 303364@main (38d0769811be): <https://commits.webkit.org/303364@main>

Reviewed commits have been landed. Closing PR #54282 and removing active labels.

[youenn fablet]

Pull request: https://github.com/WebKit/WebKit/pull/55165

[EWS]

Committed 304412@main (76bace0870c3): <https://commits.webkit.org/304412@main>

Reviewed commits have been landed. Closing PR #55165 and removing active labels.