Sticky error after trying to generate "IDN" certificate

[pfg]

I couldn't reproduce initially, but I found a post explaining this behaviour:

@schoen

@ebel, @bmw told me that this is an effect of a deliberate feature: if certbot crashes early enough that it couldn't set up logging in /var/log, it will save its crash log into the current directory in order to avoid having to print a Python traceback.

I guess the benefits of this can be questioned in the kind of situation you encountered, but it seems like it could be useful to people in other circumstances.

I'm guessing certbot crashed previously while your cwd was /etc/apache2/sites-available.