208817 2020-03-09 08:57:01 -0700 [ iOS and Mac Debug ] fast/canvas/webgl/simulated-vertexAttrib0-invalid-indicies.html is flaky timing out and crashing. 2020-05-22 16:48:37 -0700 1 1 1 Unclassified WebKit WebGL WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 212286 208724 1 Lawrence.j webkit-unassigned dino jdarpinian justin_fan kbr webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 1627789 0 Lawrence.j 2020-03-09 08:57:01 -0700 fast/canvas/webgl/simulated-vertexAttrib0-invalid-indicies.html Description: This test is flaky timing out and crashing on iOS and Mac. It appears to have a regression point of r258025. I was not able to find a valid crash log or diff. History: https://results.webkit.org/?suite=layout-tests&test=fast%2Fcanvas%2Fwebgl%2Fsimulated-vertexAttrib0-invalid-indicies.html Diff/Crash log: No crash log found for WebKitTestRunner:96552. stdout: Content-Type: text/plain CONSOLE MESSAGE: line 49: WebGL: INVALID_OPERATION: drawElements: attempt to access out of bounds arrays PASS: MAX_UINT index was unable to be simulated PASS: MAX_UINT index did not crash FAIL: Huge index did not fail validation PASS: Huge index did not crash #EOF #EOF stderr: #EOF Unable to shrink memory footprint of process (5839 MB) below the kill thresold (4096 MB). Killed #CRASHED - com.apple.WebKit.WebContent.Development (pid 97161) LEAK: 1 WebProcessPool LEAK: 1 WebPageProxy 1627795 1 webkit-bug-importer 2020-03-09 09:10:53 -0700 <rdar://problem/60225353> 1627801 2 Lawrence.j 2020-03-09 09:23:48 -0700 I have marked this test as passing while this issue is investigated. https://trac.webkit.org/changeset/258145/webkit 1627806 3 Lawrence.j 2020-03-09 09:30:53 -0700 I can reproduce the issue with r258141 and r258024 using the command below. run-webkit-tests --iterations 1000 --exit-after-n-failures 3 --debug --force-f fast/canvas/webgl/simulated-vertexAttrib0-invalid-indicies.html [6/1000] fast/canvas/webgl/simulated-vertexAttrib0-invalid-indicies.html failed unexpectedly (test timed out, test was not run) [7/1000] fast/canvas/webgl/simulated-vertexAttrib0-invalid-indicies.html failed unexpectedly (test timed out, test was not run) [8/1000] fast/canvas/webgl/simulated-vertexAttrib0-invalid-indicies.html failed unexpectedly (test timed out, test was not run) Exiting early after 3 failures. 3 tests run. 0 tests ran as expected, 3 didn't (997 didn't run): 1628052 4 ap 2020-03-09 17:40:46 -0700 Please revert r258025 (and unskip the test). 1628301 5 kbr 2020-03-10 10:19:35 -0700 @ap could we please hold off for a couple more hours? It looks like there is some old code in WebKit for vertex attribute 0 simulation that is causing this flaky crash, and that it should be #ifdef'd out with USE_ANGLE. 1628367 6 dino 2020-03-10 13:11:52 -0700 I've temporarily reverted 258025. I have a WIP fix for not-simulating vertex attribute 0. I'll turn them both on in the same patch. 1628368 7 dino 2020-03-10 13:12:17 -0700 "Fixed" in r258226 1630437 8 kbr 2020-03-16 13:13:59 -0700 Linking to the related bug for tracking purposes.