On the GTK release bot (Xvfb and software-gl) the test compositing/backing/solid-color-with-paints-into-ancestor.html is flaky and sometimes fails. The failure it gives when it fails is very subtle: https://build.webkit.org/results/GTK-Linux-64-bit-Release-Tests/r269175%20(16720)/compositing/backing/solid-color-with-paints-into-ancestor-diffs.html On the GTK release bot for wayland this tests fails always (see bug 169918) On the GTK release bot on the last 812 runs for the interval [r265175-r269175] it failed 60 times.
Updated expectations on r269178
The test or tests filed under this bug are not failing anymore. Test expectations updated in https://commits.webkit.org/258724@main.