What should happen:
Running gpg2 --card-edit and then verify should probably just ask for my PIN. GPG's SSH agent can list my public keys and use them.
What happens:
Running gpg2 --card-edit and then verify causes a segfault.
I think this error is what also breaks gpg's SSH agent.
The same setup works with Windows and/or opensc.
OS: Fedora 33, latest everything
We had some card related regressions in 2.2.23. I would appreciate if you could first test again with 2.2.24 which was released yesterday.
You have multiple readers and using PC/SC by specifying reader-port.
We fixed in master by T4998: scdaemon: PC/SC "No such device" without reader-port, and I didn't know similar fixes should be backported.
I will soon.
Building and installing 2.2.24 at least made it not crash, the very least it's an improvement in that respect.
I looked the gpg-agent.log, it indeed suggested the problem fixed in rG61aea64b3c17: scd: Fix the use case of verify_chv2 by CHECKPIN., which is included in 2.2.24.
If you encounter a problem like that in 2.2.22-2.2.24, please try doing gpg --card-status at first before actual use of card keys. Forthcoming 2.2.25 will fix all problems around that.