[pkg-gnupg-maint] Bug#797719: libgpgme11: when encrypting, sylpheed also asks me to select a key for ""

[Francesco Poli (wintermute)]

Package: libgpgme11
Version: 1.5.5-3
Severity: normal

Hello and thanks for maintaining (in Debian) the library that
makes it possible to integrate sylpheed with gnupg!

I have recently noticed that sylpheed started to behave a bit
strangely, when preparing an encrypted message.
What follows are the steps to reproduce the bug:

  0) compose a new message with sylpheed

  1) check the PGP Sign and PGP Encrypt checkboxes

  2) enter the recipient (someone with a known key), the subject
     and the message body

  3) click on the Send later button

  4) sylpheed asks the user to select a key for the recipient's e-mail
     address (everything's fine so far)

  5) select the recipient's key

  6) at this point sylpheed asks the user to select a key for ""
     and presents a list of choices that is basically the whole
     public keyring of the user

The only way to successfully finalize the message and actually send it,
seems to select the user's own key and proceed to enter the passphrase
in order to sign the message, and so forth...

This is annoying, since I already have an encrypt-to directive in
my ~/.gnupg/gpg.conf, in order to guarantee that the encrypted message
I send to other recipients are also encrypted for my key (so that
I may re-read them after sending them).

This useless additional dialog window to select a key for "" 
didn't exist in the past and only appeared recently (I cannot
figure out exactly when, sorry).

I don't know whether this is a bug in sylpheed or in gpgme1.0,
but I hope you, knowledgeable gpg package maintainers, can help
me by reproducing the issue and pinpointing it, so that my bug
report may be forwarded upstream and/or reassigned to the
correct package.

Please let me know.
Thanks for your time and dedication!



-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (800, 'testing'), (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.1.0-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Init: sysvinit (via /sbin/init)

Versions of packages libgpgme11 depends on:
ii  gnupg2         2.0.28-3
ii  libassuan0     2.2.1-1
ii  libc6          2.19-19
ii  libgpg-error0  1.19-2

libgpgme11 recommends no packages.

Versions of packages libgpgme11 suggests:
ii  gpgsm  2.0.28-3

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