$ gdb python
GNU gdb (GDB) 7.6 (Debian 7.6-5)
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/python2.7...Reading symbols from /usr/lib/debug/usr/bin/python2.7...done.
done.
(gdb) break setup_struct::~setup_struct
Function "setup_struct::~setup_struct" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y

Breakpoint 1 (setup_struct::~setup_struct) pending.
(gdb) b Py_Finalize
Breakpoint 2 at 0x421226: file ../Python/pythonrun.c, line 405.
(gdb) r -c 'import gcode; gcode.parse("", "")'
Starting program: /usr/bin/python2.7 -c 'import gcode; gcode.parse("", "")'
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Traceback (most recent call last):
  File "<string>", line 1, in <module>
AttributeError: 'str' object has no attribute 'parameter_file'

Breakpoint 2, Py_Finalize () at ../Python/pythonrun.c:405
405	../Python/pythonrun.c: No such file or directory.
(gdb) where
#0  Py_Finalize () at ../Python/pythonrun.c:405
#1  0x0000000000435472 in Py_Main (argc=<optimized out>, argv=0x7fffffffe178)
    at ../Modules/main.c:665
#2  0x00007ffff6f17995 in __libc_start_main (main=0x4354a1 <main>, argc=3,
    ubp_av=0x7fffffffe178, init=<optimized out>, fini=<optimized out>,
    rtld_fini=<optimized out>, stack_end=0x7fffffffe168) at libc-start.c:260
#3  0x0000000000574a0e in _start ()
(gdb) c
Continuing.

Breakpoint 1, setup_struct::~setup_struct (
    this=0x7ffff6b4bd10 <Interp::_setup>, __in_chrg=<optimized out>)
    at emc/rs274ngc/interp_internal.hh:572
warning: Source file is more recent than executable.
572	  ~setup_struct() {
(gdb) where
#0  setup_struct::~setup_struct (this=0x7ffff6b4bd10 <Interp::_setup>,
    __in_chrg=<optimized out>) at emc/rs274ngc/interp_internal.hh:572
#1  0x00007ffff6f2faa1 in __run_exit_handlers (status=1,
    listp=0x7ffff729c5c8 <__exit_funcs>,
    run_list_atexit=run_list_atexit@entry=true) at exit.c:77
#2  0x00007ffff6f2fb25 in __GI_exit (status=<optimized out>) at exit.c:99
#3  0x00007ffff6f1799c in __libc_start_main (main=0x4354a1 <main>, argc=3,
    ubp_av=0x7fffffffe178, init=<optimized out>, fini=<optimized out>,
    rtld_fini=<optimized out>, stack_end=0x7fffffffe168) at libc-start.c:294
#4  0x0000000000574a0e in _start ()