Stuart Henderson wrote:
>> Gnucash hangs for a couple of seconds, then crashes.
>>
> 
> https://www.openbsd.org/faq/ports/ports.html#Backtrace
> 

It is an upstream bug. I reproduced it in Linux using the Flathub build. 
Sadly I have no time to do any debugging because I am so busy trying to 
put off fires here and get the accounting done on time.