Created attachment 14725 [details]
Running samba-tool domain functionalprep on a running AD DC 4.9.3 leads to INTERNAL ERROR: Signal 11.
Backtrace is attached
Steps to reproduce:
# samba-tool domain provision
# samba-tool domain schemaupgrade
# samba-tool domain functionalprep --function-level=2012_R2
The functional prep command actually succeeds in this case, but for some reason it's crashing in the messaging code with a live server. I think this is a general issue, rather than one specific to the functional prep code.