ykls panics when a non-YubiKey smartcard reader is present

[nbraud]

The following occurs if I run ykls while my laptop's ExpressCard smartcard reader is in:

$ dpkg -x /opt/deb/buildarea/golang-pault-go-ykpiv-dev_1.3.2-1_amd64.deb .
$ ./usr/bin/ykls --help
Reader:  Gemalto GemPC Express 00 00
panic: ykpiv ykpiv_connect: PKCS Error (-2) - Error in PCSC call

goroutine 1 [running]:
main.ohshit(...)
	pault.ag/go/ykpiv/cmd/ykls/ykls.go:31
main.main()
	pault.ag/go/ykpiv/cmd/ykls/ykls.go:44 +0x7cd

After removing the reader:

$ ./usr/bin/ykls 
Reader:  Yubico YubiKey FIDO+CCID 00 00
Version: 4.3.7
Serial:  6447364
Slot Authentication (9a): [email protected]

[LudovicRousseau]

I have the same problem and in my case the PC/SC reader is also my main keyboard. So I can't disconnect it.

$ ykls
Reader:  Cherry GmbH CHERRY SECURE BOARD 1.0 [CHERRY SECURE BOARD 1.0] (00000002JS0405948M3DOGKTHA) 00 00
panic: ykpiv ykpiv_connect: PKCS Error (-2) - Error in PCSC call

goroutine 1 [running]:
main.ohshit(...)
	pault.ag/go/ykpiv/cmd/ykls/ykls.go:31
main.main()
	pault.ag/go/ykpiv/cmd/ykls/ykls.go:44 +0x7cd

One workaround is to use PCSCLITE_FILTER_IGNORE_READER_NAMES= as documented in https://ludovicrousseau.blogspot.com/2015/12/remove-andor-customize-pcsc-reader-names.html

$ sudo PCSCLITE_FILTER_IGNORE_READER_NAMES=Cherry pcscd
$ ykls
Reader:  Yubico YubiKey OTP+FIDO+CCID 00 00
Version: 5.1.2
Serial:  9718408

A correct fix would be to ignore a PC/SC reader that do not contain a Yubikey and continue with the next reader in the list.
I guess the problem is this line https://github.com/go-piv/go-ykpiv/blob/master/cmd/ykls/ykls.go#L44

[LudovicRousseau]

I was about the report, again, the same bug.
But I see it is a known issue since more than 2 years. And nothing happened.
It looks like it is a dead project :-(