ssh-add -l hangs under cygwin test 3.6.0-0.139.g...

[Norton Allen]

On 6/29/2024 5:29 PM, Brian Inglis via Cygwin wrote:
> On 2024-06-29 14:20, Norton Allen via Cygwin wrote:
>> On 6/29/2024 1:39 AM, Brian Inglis via Cygwin wrote:
>>> Installed cygwin test to try to diagnose another issue - but not 
>>> involved there.
>>> Attempting to cygport upload - just hung without start ftp connection.
>>> Reran cygport --debug upload and command hanging was ssh-add -l!
>>> Confirmed by rerunning command ssh-add -l from bash.
>>> Killed eventually with series of ctrl-C and ctrl-\.
>>> Reran under strace and output log attached.
>>> No version or help output from ssh-add so:
>>> $ ssh -V
>>> OpenSSH_9.7p1, OpenSSL 3.0.14 4 Jun 2024
>>> After running setup and reinstalling 3.5.3, ssh-add -l works 
>>> normally, and cygport upload succeeds to ftp package.
>>> Only variable was the cygwin version installed.
>
>> I have experienced otherwise inexplicable hangs of ssh that have been 
>> resolved by killing ssh-agent and restarting it. This doesn't happen 
>> very often, so it is usually mystifying when it does occur -- until I 
>> remember.
>
> I have *NEVER* had *ANY* issues using (Open)ssh etc. for remote login, 
> shell, commands, file trees, or git (and earlier vcs) access, 
> professionally and personally, over many years, releases, and systems, 
> mainly from Cygwin/-X shells and sessions (due to using mainly Windows 
> desktops with various Unix servers), with/out authorized_keys, 
> passphrases, and/or keychain, until these recent instances under the 
> test build.
>
I'm not above suspecting my problems arise from something unique in my 
setup, but it hasn't occurred often enough for me to investigate further.