Description of problem:
powerline maybe?

Version-Release number of selected component:
powerline-0.0.1-6.20140226git70a94e.fc20

Additional info:
reporter:       libreport-2.2.0
backtrace_rating: 4
cmdline:        /usr/bin/python /bin/powerline tmux left
crash_function: update_refs
executable:     /usr/bin/python2.7
kernel:         3.13.6-200.fc20.x86_64
runlevel:       N 3
type:           CCpp
uid:            1000

Truncated backtrace:
warning: core file may not match specified executable file.
[New LWP 15286]
warning: File "/var/cache/abrt-di/usr/lib/debug/usr/lib64/libpython2.7.so.1.0.debug-gdb.py" auto-loading has been declined by your `auto-load safe-path' set to "$debugdir:$datadir/auto-load:/usr/bin/mono-gdb.py".
To enable execution of this file add
	add-auto-load-safe-path /var/cache/abrt-di/usr/lib/debug/usr/lib64/libpython2.7.so.1.0.debug-gdb.py
line to your configuration file "/home/john/.gdbinit".
To completely disable this security protection add
	set auto-load safe-path /
line to your configuration file "/home/john/.gdbinit".
For more information about this security protection see the
"Auto-loading safe path" section in the GDB manual.  E.g., run from the shell:
	info "(gdb)Auto-loading safe path"
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `/usr/bin/python /bin/powerline tmux left'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  update_refs (containers=<optimized out>) at /usr/src/debug/Python-2.7.5/Modules/gcmodule.c:400
400	/usr/src/debug/Python-2.7.5/Modules/gcmodule.c: No such file or directory.

Thread 1 (Thread 0x7f147fca8740 (LWP 15286)):
#0  update_refs (containers=<optimized out>) at /usr/src/debug/Python-2.7.5/Modules/gcmodule.c:400
        gc = 0xd007f147fb2a5d0
#1  collect (generation=0) at /usr/src/debug/Python-2.7.5/Modules/gcmodule.c:998
        i = <optimized out>
        m = 0
        n = 0
        young = <optimized out>
        old = 0x7f147fa9f290 <generations+48>
        unreachable = {gc = {gc_next = 0xd0, gc_prev = 0x16c, gc_refs = 115}, dummy = <invalid float value>}
        finalizers = {gc = {gc_next = 0xf84530, gc_prev = 0x7f147f7850ca <_PyString_Eq+42>, gc_refs = 140737463596448}, dummy = <invalid float value>}