Strange behavior when executing programs

[Jon Turney]

On 13/12/2022 16:35, Frank Redeker via Cygwin wrote:

> I tried to install in fresh VM without success. (No AV installed and the 
> Windows Firewall is off)
> 
[...]
> 2022/12/13 17:04:55 net: Direct
> Cached mirror list unavailable
> User-Agent: default is "Cygwin-Setup/2.924 (Windows NT 
> 10.0.18362;Win64;0407;SymLinkPriv)"
> 2022/12/13 17:05:25 connection error: 12057 fetching 
> https://cygwin.com/mirrors.lst
> 2022/12/13 17:05:25 mbox note: Could not download mirror sites list
> Defaulting to empty mirror list

The meaning of the 12057 error isn't clear, but it seems to mean you are 
behind a proxy, which isn't co-operating. (See e.g. [1])

[1] https://cygwin.com/pipermail/cygwin/2022-February/250814.html

You could work around the inability to fetch the mirror list (the only 
piece of information setup tries to get from cygwin.com), by explicitly 
specifying one from [2]

[2]  https://cygwin.com/mirrors.html