read_input.py works fine, but read_input_rpython_import.py writes a strange traceback to the console

behaviour of rpython version

$ PYTHONPATH=pypy python2 read_input_rpython_import.py
[platform:execute] gcc -c -O3 -pthread -fomit-frame-pointer -Wall -Wno-unused /tmp/usession-release-2.2.x-41/platcheck_0.c -o /tmp/usession-release-2.2.x-41/platcheck_0.o
[platform:execute] gcc /tmp/usession-release-2.2.x-41/platcheck_0.o -pthread -lintl -lrt -o /tmp/usession-release-2.2.x-41/platcheck_0
> ^C
Traceback (most recent call last):
caught keyboard interrupt
  File "/home/wilfred/projects/baobob/pypy/rpython/tool/runsubprocess.py", line 39, in <module>
>     operation = sys.stdin.readline()
KeyboardInterrupt
^C
caught keyboard interrupt
> ^C
caught keyboard interrupt
> 

read_input.py

import sys

def entry_point(argv):
    while True:
        try:
            user_input = raw_input('> ')
            print user_input
        except KeyboardInterrupt:
            print '\nkeyboard interrupt'
    
    return 0


def target(*args):
    return entry_point, None


if __name__ == '__main__':
    entry_point(sys.argv)

read_input_rpython_import.py

import sys

from rpython.rlib.rsre import rsre_core

def entry_point(argv):
    while True:
        try:
            user_input = raw_input('> ')
            print user_input
        except KeyboardInterrupt:
            print '\ncaught keyboard interrupt'
    
    return 0


def target(*args):
    return entry_point, None


if __name__ == '__main__':
    entry_point(sys.argv)