[GTK][WPE] Error on simulated vertexAttrib0 array

[Diego Pino]

Test started to fail since r258875 ([WebGL] Skip vertexAttrib0 simulation when using ANGLE):

  fast/canvas/webgl/out-of-bounds-simulated-vertexAttrib0-drawArrays.html [ Failure ]

Diff:

--- /home/dpino/workspace/webkit-wpe/layout-test-results/retries/fast/canvas/webgl/out-of-bounds-simulated-vertexAttrib0-drawArrays-expected.txt
+++ /home/dpino/workspace/webkit-wpe/layout-test-results/retries/fast/canvas/webgl/out-of-bounds-simulated-vertexAttrib0-drawArrays-actual.txt
@@ -1 +1,2 @@
+CONSOLE MESSAGE: line 30: WebGL: INVALID_OPERATION: drawArrays: attempt to access outside the bounds of the simulated vertexAttrib0 array

[Diego Pino]

A similar test is failing:

  fast/canvas/webgl/index-validation-with-subsequent-draws.html

The test started failing after r260889, but it's also happening in r260880 (without the bots reporting about this failure). It's likely this issue started to happen due to the switch to flatpak in r260889.

[Diego Pino]

Forgot to add reference and diff.

See: https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20(Tests)/r260889%20(13542)/results.html

--- /home/slave/webkitgtk/gtk-linux-64-release-tests/build/layout-test-results/fast/canvas/webgl/index-validation-with-subsequent-draws-expected.txt
+++ /home/slave/webkitgtk/gtk-linux-64-release-tests/build/layout-test-results/fast/canvas/webgl/index-validation-with-subsequent-draws-actual.txt
@@ -1 +1,3 @@
+CONSOLE MESSAGE: WebGL: INVALID_OPERATION: drawElements: unable to simulate vertexAttrib0 array
+CONSOLE MESSAGE: WebGL: INVALID_OPERATION: drawElements: unable to simulate vertexAttrib0 array

[Lauro Moura]

*** Bug 209725 has been marked as a duplicate of this bug. ***

[Alejandro G. Castro]

After replacing the WebGL backend with ANGLE this bug is fixed. The gardening commit is:

https://commits.webkit.org/255008@main

[Radar WebKit Bug Importer]

<rdar://problem/100577616>