[pkg-gnupg-maint] Bug#840687: gnupg: Fails to sign git commits

[Josef Vitu]

Package: gnupg
Version: 2.1.15-4
Severity: normal

Dear Maintainer,

after upgrading from 1.4.20-6 to 2.1.15-4, signing a git commit fails with
the following errors:

gpg: signing failed: No data callback in IPC
gpg: signing failed: No data callback in IPC
error: gpg failed to sign the data
fatal: failed to write commit object

The password input into the pinentry-gnome3 (or pinentry-gtk-2) dialog is
100% correct.

Attempts to use pinentry-tty failed with:

gpg: signing failed: Invalid IPC response

I can view/edit/etc. all of the stored keys (using gpg; tried to install
seahorse as well), only the communication wit git seems to be failing.

Downgrading to 1.4.18-7+deb8u2 fixes the problem.

Regards
Josef Vitu


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

Kernel: Linux 4.7.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gnupg depends on:
ii  gnupg-agent    2.1.15-4
ii  libassuan0     2.4.3-1
ii  libbz2-1.0     1.0.6-8
ii  libc6          2.24-3
ii  libgcrypt20    1.7.3-1
ii  libgpg-error0  1.24-1
ii  libksba8       1.3.5-2
ii  libreadline7   7.0-1
ii  libsqlite3-0   3.14.2-1+b1
ii  zlib1g         1:1.2.8.dfsg-2+b1

Versions of packages gnupg recommends:
ii  dirmngr     2.1.15-4
pn  gnupg-l10n  <none>

Versions of packages gnupg suggests:
pn  parcimonie  <none>
pn  xloadimage  <none>

-- no debconf information