Tvheadend

This is possibly happening since #2969 was fixed but may be completely unrelated. gdb.txt attached. It happened a few times for now, but I could not track it down to a specific task, currently i was watching a channel + epg grabber did run. If you need a core dump I would have this as well.
The last thing i can see in the web log is broken pipe for all my clients (active and non active) and a little bit later it's trying to reconnect (not sure about that as this could be caused by gdb as well)