OpenSC pkcs11_eventmgr doesn't detect token removal

[remfalc]

Apparently there is a bug in the OpenSC PKCS11 library and keep returning the token even after it has been removed.

Environment:
Arch x86_64
Ubuntu 19.10 (eoan)
OpenSC 0.19.0-2

Steps to reproduce:

I am using the command line pkcs11-tool to test the detection of the insertion/removal of the token.

shell # pkcs11-tool --test-hotplug
Testing card detection using C_GetSlotList()
Please press return to continue, x to exit: <==== Token inserted
Available slots:
Slot 0 (0x0): Yubico Yubikey NEO OTP+U2F+CCID 00 00
  token label : xxxxx
  token manufacturer : piv_II
  token model : PKCS#15 emulated
  token flags : login required, rng, token initialized, PIN initialized
  hardware version : 0.0
  firmware version : 0.0
  serial num : xxxxxxxxx
  pin min/max : 4/8

Please press return to continue, x to exit: <==== Token removed
Available slots:
Slot 0 (0x0): (GetSlotInfo failed, CKR_GENERAL_ERROR)

Please press return to continue, x to exit:
Available slots:
Slot 0 (0x0): (GetSlotInfo failed, CKR_GENERAL_ERROR)

Please press return to continue, x to exit: <==== Still detecting a token despite token being removed
Available slots:
Slot 0 (0x0): Yubico Yubikey NEO OTP+U2F+CCID 00 00
  token label : xxxxx
  token manufacturer : piv_II
  token model : PKCS#15 emulated
  token flags : login required, rng, token initialized, PIN initialized
  hardware version : 0.0
  firmware version : 0.0
  serial num : xxxxxxxxxxx
  pin min/max : 4/8

Fix
A bug was opened with OpenSC and is now fixed as of version 0.20.0
https://github.com/OpenSC/OpenSC/issues/1706

Would it be possible to upgrade OpenSC to 0.20.0 in the next version?

[Sebastien Bacher (seb128)]

https://bugs.launchpad.net/ubuntu/+source/opensc/0.20.0-3