hkaiser: I've tested my example from #5117 with the channel-branch. The error message has changed constantly to
```
{stack-trace}: 1 frame:
0x7fa5e0e822d0  : /lib64/libpthread.so.0(+0x132d0) [0x7fa5e0e822d0] in /lib64/libpthread.so.0
{what}: Segmentation fault
```
I'll have to see when I can check it in the second environment.