On thinking about this, it does seem the behavior change of udevadm will be highly disruptive to existing callers of udevadm trigger, so I opened upstream bug to try to address it without needing all callers to ignore its return code.
On thinking about this, it does seem the behavior change of udevadm will be highly disruptive to existing callers of udevadm trigger, so I opened upstream bug to try to address it without needing all callers to ignore its return code.