import ctypes

def c_segfault():
    libc = ctypes.cdll.LoadLibrary('libc.so.6')
    pos = libc.strstr(1, 1)

def python_segfault():
    ctypes.string_at(1)

def e():
    print "enter e"
    try:
        python_segfault()
    except Exception, err:
        print "ERROR in e(): %s"  % err
        c_segfault()
    print "exit e"

def d():
    print "enter d"
    try:
        e()
    except Exception, err:
        print "ERROR in d(): %s"  % err
    print "exit d"

def c():
    print "enter c"
    try:
        d()
    except Exception, err:
        print "ERROR in c(): %s"  % err
    print "exit c"

def b():
    print "enter b"
    try:
        c()
    except Exception, err:
        print "ERROR in b(): %s"  % err
    print "exit b"

def a():
    print "enter a"
    try:
        b()
    except Exception, err:
        print "ERROR in a(): %s"  % err
    print "exit a"

a()