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[Launchpad Bug Tracker <989819@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package apport - 2.14.1-0ubuntu3.20

---------------
apport (2.14.1-0ubuntu3.20) trusty-proposed; urgency=medium

  * Disambiguate overly generic Python exceptions in duplicate signature
    computation: dbus-glib's DBusException wraps a "real" server-side
    exception, so add the class of that to disambiguate different crashes;
    for OSError that is not a known subclass like FileNotFoundError, add the
    errno. (LP: #989819)

 -- Martin Pitt <martin.pitt@xxxxxxxxxx>  Fri, 01 Apr 2016 16:27:39
+0200

** Changed in: apport (Ubuntu Trusty)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/989819

Title:
  Make duplicate signature more specific for DBusException and OSError

Status in Daisy:
  Confirmed
Status in apport package in Ubuntu:
  Fix Released
Status in apport source package in Trusty:
  Fix Released
Status in apport source package in Xenial:
  Fix Released

Bug description:
  Looking through some db bug examples and saw some incorrect bug
  associations, one example

  "Traceback (most recent call last):
    File "/usr/lib/python2.7/dist-packages/LanguageSelector/gtk/GtkLanguageSelector.py", line 62, in wrapper
      res = f(*args, **kwargs)
    File "/usr/lib/python2.7/dist-packages/LanguageSelector/gtk/GtkLanguageSelector.py", line 74, in wrapper
      res = f(*args, **kwargs)
    File "/usr/lib/python2.7/dist-packages/LanguageSelector/gtk/GtkLanguageSelector.py", line 1090, in on_combobox_locale_chooser_changed
      self.writeUserFormats()
    File "/usr/lib/python2.7/dist-packages/LanguageSelector/gtk/GtkLanguageSelector.py", line 775, in writeUserFormats
      self.writeUserFormatsSetting(userFormats=code)
    File "/usr/lib/python2.7/dist-packages/LanguageSelector/LanguageSelector.py", line 71, in writeUserFormatsSetting
      iface.SetFormatsLocale(macr['SYSLOCALE'])
    File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 70, in __call__
      return self._proxy_method(*args, **keywords)
    File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 145, in __call__
      **keywords)
    File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in call_blocking
      message, timeout)
  DBusException: org.freedesktop.Accounts.Error.PermissionDenied: Not authorized"

  has been associated to
  https://bugs.launchpad.net/ubuntu/+source/accountsservice/+bug/930785

  "Traceback (most recent call last):
    File "/usr/lib/python2.7/dist-packages/LanguageSelector/gtk/GtkLanguageSelector.py", line 62, in wrapper
      res = f(*args, **kwargs)
    File "/usr/lib/python2.7/dist-packages/LanguageSelector/gtk/GtkLanguageSelector.py", line 74, in wrapper
      res = f(*args, **kwargs)
    File "/usr/lib/python2.7/dist-packages/LanguageSelector/gtk/GtkLanguageSelector.py", line 1081, in on_combobox_locale_chooser_changed
      self.writeUserFormats()
    File "/usr/lib/python2.7/dist-packages/LanguageSelector/gtk/GtkLanguageSelector.py", line 775, in writeUserFormats
      self.writeUserFormatsSetting(userFormats=code)
    File "/usr/lib/python2.7/dist-packages/LanguageSelector/LanguageSelector.py", line 71, in writeUserFormatsSetting
      iface.SetFormatsLocale(macr['SYSLOCALE'])
    File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 70, in __call__
      return self._proxy_method(*args, **keywords)
    File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 145, in __call__
      **keywords)
    File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in call_blocking
      message, timeout)
  DBusException: org.freedesktop.Accounts.Error.Failed: 'bg_BG.UTF-8' is not a valid locale name"

  The "functions signature" is the same, the exceptions are different
  though, it should probably consider that as part of the signature

  SRU TEST CASE:
  --------------
   * Modify /usr/bin/pybuild to append these two lines right after "def main(cfg):"

      raise OSError(99, 'some OS error')

   * Now running "pybuild" will provoke an OSError, and you should get a
  /var/crash/_usr_share_dh-python_pybuild.1000.crash

   * With current apport, the crash signature looks like this, i. e. it
  does not include the errno (99):

    $ python3 -c 'import apport; r = apport.Report(); r.load(open("/var/crash/_usr_share_dh-python_pybuild.1000.crash", "rb")); print(r.crash_signature())'
  /usr/share/dh-python/pybuild:OSError:/usr/share/dh-python/pybuild@449:main

   * With this apport update (you need to rm the .crash and re-generate
  it), it will look like this instead:

    /usr/share/dh-python/pybuild:OSError(99):/usr/share/dh-
  python/pybuild@449:main

   i. e. the errno 99 will be used to disambiguate/duplicate the crash.

  This works similarly for DBusErrors, but this is much harder to test
  manually. The backported patch includes automatic test cases which
  cover the DBusError cases, though.

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