bug#26298: 26.0.50; Gnus fails to sign mail with PGP

[Toon Claes]

Torsten Bronger <bronger@physik.rwth-aachen.de> writes:

> Debugger entered--Lisp error: (wrong-type-argument char-or-string-p
> nil)

I've been digging deeper into this bug.

What I've found so far, `epg-start-sign' (or `epg-wait-for-completion',
I am not sure) called in `epg-sign-string' is failing with the error:

  gpg: signing failed: Inappropriate ioctl for device

I have to stop digging for today, but I'd like to know why
`epg-sign-string' fails to get passphrase, while `epa-sign-file'
succeeds.


-- Toon