compositing/filters/opacity-change-on-filtered-paints-into-ancestor.html [ ImageOnlyFailure Pass ] The test frequently fails on the first run and passes on the second. The images when it fails can be seen here: https://build.webkit.org/results/GTK%20Linux%2064-bit%20Release%20(Tests)/r235732%20(8061)/compositing/filters/opacity-change-on-filtered-paints-into-ancestor-diffs.html Curiously, it seems that a blur is missing in the resulting image when it fails. This was passing fine until r235406. After that there are a lot of revisions missing to test until r235648 where it failed for the first time.
The test or tests filed under this bug are not failing anymore. Test expectations updated in https://commits.webkit.org/258724@main.