Description of problem:
pavucontrol segfaults when run. This makes it hard to change settings for sound devices.

I am running an xfce desktop.

Version-Release number of selected component (if applicable):
pavucontrol-2.0-2.fc20.i686

How reproducible:
100%

Steps to Reproduce:
If you want to see the segfault message you can run pavucontrol from a shell prompt. If you run it normally you just see a window open briefly and then close.

Actual results:

bash-4.2$ gdb `which pavucontrol`
GNU gdb (GDB) Fedora 7.6.50.20130731-12.fc21
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
This GDB was configured as "i686-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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..
Reading symbols from /usr/bin/pavucontrol...Reading symbols from /usr/bin/pavucontrol...(no debugging symbols found)...done.
(no debugging symbols found)...done.
Missing separate debuginfos, use: debuginfo-install pavucontrol-2.0-2.fc20.i686
(gdb) run
Starting program: /usr/bin/pavucontrol 
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib/libgobject-2.0.so.0.3800.0-gdb.py", line 9, in <module>
    from gobject import register
  File "/usr/share/glib-2.0/gdb/gobject.py", line 3, in <module>
    import gdb.backtrace
ImportError: No module named backtrace
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib/libgobject-2.0.so.0.3800.0-gdb.py", line 9, in <module>
    from gobject import register
  File "/usr/share/glib-2.0/gdb/gobject.py", line 3, in <module>
    import gdb.backtrace
ImportError: No module named backtrace
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
[New Thread 0xb7ba5b40 (LWP 20320)]

Program received signal SIGSEGV, Segmentation fault.
0x4b7af261 in __strlen_ia32 () from /lib/libc.so.6
(gdb)