This probably applies to more recent version also.

It may be a readline bug, but I haven't seen it except when using the python interface, despite using this same .inputrc file with many different command line programs.

I've attached the ~/.inputrc which are required to trigger the problem. 
This simple script will allow the problem to be reproduced:

     #!/usr/bin/python3.4-dbg

     import readline

     input('the_prompt> ')

After launching test.py with the given ~/.inputrc in place, simply type Cntrl-q to trigger the seg fault.

Perhaps if this can be confirmed to be a readline issue someone can submit a bug report to that project.

Britton