Bug 307882 – REGRESSION(307450@main): [iOS] webgl/lose-context-after-context-lost.html is a constant text failure

• Component: New Bugs
• Status: RESOLVED FIXED

[Diego De La Toba]

webgl/lose-context-after-context-lost.html is a constant text failure on iOS


HISTORY:
https://results.webkit.org/?suite=layout-tests&test=webgl%2Flose-context-after-context-lost.html


DIFF:
--- /Volumes/Data/worker/Apple-iOS-26-Simulator-Release-WK2-Tests/build/layout-test-results/webgl/lose-context-after-context-lost-expected.txt
+++ /Volumes/Data/worker/Apple-iOS-26-Simulator-Release-WK2-Tests/build/layout-test-results/webgl/lose-context-after-context-lost-actual.txt
@@ -2,7 +2,7 @@
 
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
-TEST COMPLETE: 31 PASS, 0 FAIL
+TEST COMPLETE: 28 PASS, 3 FAIL
 
 Running test: loseMethod: loseContext, testedMethod: loseContext
 PASS Got webglcontextlost.
@@ -17,9 +17,9 @@
 PASS gl.getError() is gl.NO_ERROR
 PASS Did not crash on tested method restoreContext.
 Running test: loseMethod: manyContexts, testedMethod: loseContext
-PASS Got webglcontextlost.
-PASS gl.isContextLost() is true
-PASS gl.getError() is gl.CONTEXT_LOST_WEBGL
+FAIL Timed out waiting webglcontextlost.
+FAIL gl.isContextLost() should be true. Was false.
+FAIL gl.getError() should be 37442. Was 0.
 PASS gl.getError() is gl.NO_ERROR
 PASS Did not crash on tested method loseContext.
 Running test: loseMethod: manyContexts, testedMethod: restoreContext


DIFF URL:
https://build.webkit.org/results/Apple-iOS-26-Simulator-Release-WK2-Tests/307494@main%20(1722)/webgl/lose-context-after-context-lost-pretty-diff.html


REPRODUCTION:
I was able to reproduce this failure with an iOS Simulator (iPhone 12 running iOS 26.2 ToT) with the following:

run-webkit-tests --ios-simulator --child-processes=1  --force --no-retry --release --iterations 10 webgl/lose-context-after-context-lost.html

I am going to mark expectations as fail while this pends investigation.

[Radar WebKit Bug Importer]

<rdar://problem/170363832>

[Diego De La Toba]

Pull request: https://github.com/WebKit/WebKit/pull/58700

[EWS]

Test gardening commit 307550@main (5df9841519c9): <https://commits.webkit.org/307550@main>

Reviewed commits have been landed. Closing PR #58700 and removing active labels.

[Kimmo Kinnunen]

Pull request: https://github.com/WebKit/WebKit/pull/59499

[EWS]

Committed 308319@main (586c879d099e): <https://commits.webkit.org/308319@main>

Reviewed commits have been landed. Closing PR #59499 and removing active labels.