Hi!
I upgraded a Moodle 3.5.7 to 3.5.8. After one hour, I noticed an intense CPU activity. The cron was consumming 100% CPU of a core.
It cron was hanging after launching the task core\task\build_installed_themes_task. This task was lost after launching theme_build_css_for_themes().
A simpler way to reproduce the problem is to execute directly php admin/cli/build_theme_css.php. Here is the error I got:
Default exception handler: Exception : Maximum function nesting level of '256' reached, aborting!
Since I was using a custom theme I removed it, to no end.
Does anyone have the same issue?
PS: I also have some Moodle 3.6 and 3.7, all are running fine after upgrading.
Regards,
JF