[Bug 950087] Re: python2.7 crashed with SIGSEGV in g_object_newv() when using gi binding for xklavier (gir1.2-xkl-1.0)

[Martin Pitt]

This is not a bug. The API does not publicly expose the constructor, i.
e. Xkl.Engine.new() does not exist. Xkl.Engine() invokes the GObject
constructor on it, which we cannot hide unfortunately.

The API documentation [1] shows that you need to use the singleton
function Xkl.Engine.get_instance(display) for this. This works fine, the
upstream code has a test script for all this, which you might steal from
[2].

[1] http://xlibs.freedesktop.org/xkbdesc/doc/libxklavier-xkl-engine.html#xkl-engine-get-instance
[2] http://cgit.freedesktop.org/libxklavier/tree/tests/test_gi.py

** Changed in: libxklavier (Ubuntu Precise)
       Status: In Progress => Triaged

** Package changed: libxklavier (Ubuntu Precise) => ubiquity (Ubuntu
Precise)

** Changed in: ubiquity (Ubuntu Precise)
     Assignee: Martin Pitt (pitti) => Stéphane Graber (stgraber)

** Summary changed:

- python2.7 crashed with SIGSEGV in g_object_newv() when using gi binding for xklavier (gir1.2-xkl-1.0)
+ Calls Xkl.Engine() gobject constructor which is invalid; needs to use Xkl.Engine.get_instance

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https://bugs.launchpad.net/bugs/950087

Title:
  Calls Xkl.Engine() gobject constructor which is invalid; needs to use
  Xkl.Engine.get_instance

Status in “ubiquity” package in Ubuntu:
  Triaged
Status in “ubiquity” source package in Precise:
  Triaged

Bug description:
  stgraber at castiana:~/data/code/ubiquity/ubiquity$ python
  Python 2.7.2+ (default, Feb 16 2012, 18:47:58) 
  [GCC 4.6.2] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  >>> from gi.repository import Xkl
  >>> test = Xkl.Engine()
  Segmentation fault (core dumped)

  
  Mostly annoying as it's blocking the bugfix for bug 800561

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: python2.7-minimal 2.7.2-13ubuntu5
  ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
  Uname: Linux 3.2.0-18-generic x86_64
  ApportVersion: 1.94.1-0ubuntu1
  Architecture: amd64
  Date: Thu Mar  8 12:04:58 2012
  ExecutablePath: /usr/bin/python2.7
  ProcCmdline: python
  ProcEnviron:
   SHELL=/bin/bash
   TERM=xterm
   LANG=en_US.UTF-8
  SegvAnalysis:
   Segfault happened at: 0x7f6446e98bef:	movslq 0xe0(%r12),%rax
   PC (0x7f6446e98bef) ok
   source "0xe0(%r12)" (0x000000e0) not located in a known VMA region (needed readable region)!
   destination "%rax" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: python2.7
  StacktraceTop:
   ?? () from /usr/lib/libxklavier.so.16
   g_object_newv () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
   ?? () from /usr/lib/python2.7/dist-packages/gi/_gobject/_gobject.so
   ?? () from /usr/lib/python2.7/dist-packages/gi/_gobject/_gobject.so
   ?? ()
  Title: python2.7 crashed with SIGSEGV in g_object_newv()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: pkcs11

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