Crash when attempting to access locked keyring via libsecret

[pjcdawkins]

Using version 0.8.1 (docker-credential-secretservice-v0.8.1.linux-amd64) saved as credential-helper in Ubuntu / Gnome:

1. Lock the login keyring by clicking the padlock in seahorse (Passwords and Keys)
2. Run ./credential-helper get <<< my-server-url
3. The dialog appears saying "Authentication Required" / "The login keyring did not get unlocked when you logged into your computer"
4. I could enter a password, but I wonder what happens if I click "Cancel"
5. This causes credential-helper to crash with the attached output (TXT file)

(process:746257): libsecret-CRITICAL **: 20:20:45.887: secret_value_get: assertion 'value' failed
SIGSEGV: segmentation violation