[Python-apps-team] Bug#646546: mercurial fails to run: abort: couldn't find mercurial libraries in [/usr/bin /usr/lib/python2.6 [...]

[Thilo-Alexander Ginkel]

Package: mercurial
Version: 1.6.4-1
Severity: normal
Tags: squeeze

Mercurial as installed on a fresh Debian 6.0 installation fails to execute with the following error message:

tg at vega ~$ hg
abort: couldn't find mercurial libraries in [/usr/bin /usr/lib/python2.6 /usr/lib/python2.6/plat-linux2 /usr/lib/python2.6/lib-tk /usr/lib/python2.6/lib-old /usr/lib/python2.6/lib-dynload /usr/local/lib/python2.6/dist-packages /usr/lib/python2.6/dist-packages /usr/lib/pymodules/python2.6]
(check your install and PYTHONPATH)

Some more verbose output:

tg at vega ~$ PYTHONVERBOSE=x hg
# installing zipimport hook
import zipimport # builtin
# installed zipimport hook
# /usr/lib/python2.6/site.pyc matches /usr/lib/python2.6/site.py
import site # precompiled from /usr/lib/python2.6/site.pyc
# /usr/lib/python2.6/os.pyc matches /usr/lib/python2.6/os.py
import os # precompiled from /usr/lib/python2.6/os.pyc
import errno # builtin
import posix # builtin
# /usr/lib/python2.6/posixpath.pyc matches /usr/lib/python2.6/posixpath.py
import posixpath # precompiled from /usr/lib/python2.6/posixpath.pyc
# /usr/lib/python2.6/stat.pyc matches /usr/lib/python2.6/stat.py
import stat # precompiled from /usr/lib/python2.6/stat.pyc
# /usr/lib/python2.6/genericpath.pyc matches /usr/lib/python2.6/genericpath.py
import genericpath # precompiled from /usr/lib/python2.6/genericpath.pyc
# /usr/lib/python2.6/warnings.pyc matches /usr/lib/python2.6/warnings.py
import warnings # precompiled from /usr/lib/python2.6/warnings.pyc
# /usr/lib/python2.6/linecache.pyc matches /usr/lib/python2.6/linecache.py
import linecache # precompiled from /usr/lib/python2.6/linecache.pyc
# /usr/lib/python2.6/types.pyc matches /usr/lib/python2.6/types.py
import types # precompiled from /usr/lib/python2.6/types.pyc
# /usr/lib/python2.6/UserDict.pyc matches /usr/lib/python2.6/UserDict.py
import UserDict # precompiled from /usr/lib/python2.6/UserDict.pyc
# /usr/lib/python2.6/_abcoll.pyc matches /usr/lib/python2.6/_abcoll.py
import _abcoll # precompiled from /usr/lib/python2.6/_abcoll.pyc
# /usr/lib/python2.6/abc.pyc matches /usr/lib/python2.6/abc.py
import abc # precompiled from /usr/lib/python2.6/abc.pyc
# /usr/lib/python2.6/copy_reg.pyc matches /usr/lib/python2.6/copy_reg.py
import copy_reg # precompiled from /usr/lib/python2.6/copy_reg.pyc
# /usr/lib/python2.6/sitecustomize.pyc matches /usr/lib/python2.6/sitecustomize.py
import sitecustomize # precompiled from /usr/lib/python2.6/sitecustomize.pyc
import encodings # directory /usr/lib/python2.6/encodings
# /usr/lib/python2.6/encodings/__init__.pyc matches /usr/lib/python2.6/encodings/__init__.py
import encodings # precompiled from /usr/lib/python2.6/encodings/__init__.pyc
# /usr/lib/python2.6/codecs.pyc matches /usr/lib/python2.6/codecs.py
import codecs # precompiled from /usr/lib/python2.6/codecs.pyc
import _codecs # builtin
# /usr/lib/python2.6/encodings/aliases.pyc matches /usr/lib/python2.6/encodings/aliases.py
import encodings.aliases # precompiled from /usr/lib/python2.6/encodings/aliases.pyc
# /usr/lib/python2.6/encodings/utf_8.pyc matches /usr/lib/python2.6/encodings/utf_8.py
import encodings.utf_8 # precompiled from /usr/lib/python2.6/encodings/utf_8.pyc
Python 2.6.6 (r266:84292, Dec 26 2010, 22:31:48) 
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
abort: couldn't find mercurial libraries in [/usr/bin /usr/lib/python2.6 /usr/lib/python2.6/plat-linux2 /usr/lib/python2.6/lib-tk /usr/lib/python2.6/lib-old /usr/lib/python2.6/lib-dynload /usr/local/lib/python2.6/dist-packages /usr/lib/python2.6/dist-packages /usr/lib/pymodules/python2.6]
(check your install and PYTHONPATH)
# clear __builtin__._
[...]

Manually attempting to import mercurial from a python shell also fails (but succeeds on Lenny, where mercurial is also working correctly):

tg at vega ~$ python
Python 2.6.6 (r266:84292, Dec 26 2010, 22:31:48) 
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import mercurial
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named mercurial


-- System Information:
Debian Release: 6.0.3
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-028stab092.1 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages mercurial depends on:
ii  libc6                   2.11.2-10        Embedded GNU C Library: Shared lib
ii  mercurial-common        1.6.4-1          scalable distributed version contr
ii  python                  2.6.6-3+squeeze6 interactive high-level object-orie
ii  python-support          1.0.10           automated rebuilding support for P
ii  ucf                     3.0025+nmu1      Update Configuration File: preserv

mercurial recommends no packages.

Versions of packages mercurial suggests:
pn  kdiff3 | tkd <none>                      (no description available)
pn  qct          <none>                      (no description available)
ii  vim          2:7.2.445+hg~cb94c42c0e1a-1 Vi IMproved - enhanced vi editor
pn  wish         <none>                      (no description available)

-- no debconf information