Nothing odd in the log.
This is the only message I can see in the terminal window of the server when it crashes:
Sat Jan 25 19:51:27 EET 2020: hansa exited, sleeping for 5 seconds
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Sat Jan 25 19:51:32 EET 2020: starting hansa
2020-01-25 19:51:32 HansaWorld 8.5 (33) for Linux, (64-bit pointers, 64-bit db access) starting
Strange that the above 3 lines never get written to the log.