IOError: Not a gzipped file on uncompressed gzip attachment

[Jean-Baptiste Lallement]

Binary package hint: apport

When you download a report with an attachment with a .gz extension but this attachment is already decompressed, the download of the report fails with the error:

Traceback (most recent call last):
  File "./crashdb_bug.py", line 6, in <module>
    report = crashdb.download(573714)
  File "/usr/lib/python2.6/dist-packages/apport/crashdb_impl/launchpad.py", line 291, in download
    report[key] = gzip.GzipFile(fileobj=attachment).read()#TODO: is this the best solution?
  File "/usr/lib/python2.6/gzip.py", line 212, in read
    self._read(readsize)
  File "/usr/lib/python2.6/gzip.py", line 255, in _read
    self._read_gzip_header()
  File "/usr/lib/python2.6/gzip.py", line 156, in _read_gzip_header
    raise IOError, 'Not a gzipped file'
IOError: Not a gzipped file

== Example to reproduce ==
#!/usr/bin/python
import apport
from apport.crashdb import get_crashdb

crashdb = get_crashdb(None)
report = crashdb.download(573714)

This is a very common failure with reports with VarLogDistupgradeLspcitxt.gz attached.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: apport 1.13.3-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-19-generic i686
ApportLog:

Architecture: i386
CrashReports: 600:0:0:804682:2010-04-27 00:27:41.000000000 +0200:2010-04-27 10:30:31.000000000 +0200:/var/crash/lemonpos.0.crash
Date: Mon May 3 12:28:17 2010
EcryptfsInUse: Yes
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: apport

[Jean-Baptiste Lallement (jibel)]

Here is a possible patch.

[Martin Pitt (pitti)]

Fixed in trunk r1775

[Launchpad Janitor (janitor)]

This bug was fixed in the package apport - 1.14-0ubuntu1

---------------
apport (1.14-0ubuntu1) maverick; urgency=low

  * New upstream release:
    - hookutils.py: Add new method attach_drm_info() to read and format
      /sys/class/drm/*. (desktop-maverick-xorg-gpu-freeze-reports)
    - packaging-apt-dpkg.py: Fix deprecated python-apt variables, thanks David
      Stansby. (LP: #591695)
    - launchpad.py: Fix crash on attachments which are named *.gz, but
      uncompressed. (LP: #574360)
    - hookutils.py, attach_gconf(): Fix defaults parsing for boolean keys.
      (LP: #583109)
  * debian/control: Bump p-distutils-extra build-dependency to 2.19, to ensure
    that we get a complete translation template. (LP: #533565)
 -- Martin Pitt <email address hidden> Wed, 16 Jun 2010 15:50:55 +0200