gpg2: pkglue.c:41: mpi_from_sexp: Assertion `data' failed.

[Anders Kaseorg]

I get the following error messages about half the time when using gpg2 in oneiric:

gpg2: pkglue.c:41: mpi_from_sexp: Assertion `data' failed.
Aborted (core dumped)

Based on http://marc.info/?l=gcrypt-devel&m=130963052602822&w=3 , I tried this upstream patch and confirmed that it fixes the problem:
http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commitdiff;h=13290b0e0fcf3a493e4848b29329d56b69bc4dd9

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gnupg2 2.0.17-2ubuntu1 [modified: usr/share/doc/gnupg2/changelog.Debian.gz]
ProcVersionSignature: Ubuntu 3.0.0-6.7-generic 3.0.0-rc7
Uname: Linux 3.0.0-6-generic x86_64
NonfreeKernelModules: openafs
Architecture: amd64
Date: Sat Jul 23 15:31:23 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20101202)
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: gnupg2
UpgradeStatus: No upgrade log present (probably fresh install)

[Martin Pool (mbp)]

I get this too.

It seems like running 'gpg --update-trustdb' may work around the problem? (I don't know; perhaps it's just intermittent?)

[Martin Pool (mbp)]

No, I spoke too soon, it still fails.

[Anders Kaseorg (andersk)]

Can you try my patch in comment 2 (also built in https://launchpad.net/~anders-kaseorg/+archive/ppa )? It completely fixed it for me.

[Martin Pool (mbp)]

I have a test build of that in http://pad.lv/ppa/mbp

[Martin Pool (mbp)]

I'm just going to try a duplicity run (which starts gpg many times) to see if it fixes the problem. It certainly looks like it will.

[Martin Pool (mbp)]

This seems to be working for me.

mp https://code.launchpad.net/~mbp/ubuntu/oneiric/gnupg2/815190-assertion/+merge/71140

[Martin Pool (mbp)]

daviey spoke to me on irc about sponsoring an upload of this.

[Launchpad Janitor (janitor)]

This bug was fixed in the package gnupg2 - 2.0.17-2ubuntu2

---------------
gnupg2 (2.0.17-2ubuntu2) oneiric; urgency=low

  * debian/patches/gnupg2-fix-libgcrypt.diff: Fix assertion failure with
    libgcrypt 1.5.0. (LP: #815190)
 -- Anders Kaseorg <email address hidden> Sat, 23 Jul 2011 15:50:51 -0400