setup: coldcore crashes on public.txt file transfer

[billygarrison]

This is on Windows, I'm not sure if it is reproducible on Mac/Linux.

Steps to reproduce:

• Start coldcore (before having loaded public.txt in)
• Get to the point where it says it's waiting for public.txt
• Load public.txt into coldcore folder

I think coldcore is trying to access public.txt before it is fully written to the folder. I don't have a copy of the error message (because coldcore cleared the output the next time I ran it) but I believe it was a permissions error, presumably because it was in the process of being written to disk.

[jamesob]

You should be able to have coldcore create a durable log by passing --debug; that log might allow us to diagnose what's happening.