This looks like a duplicate ofissue 21398. I can reproduce it with Python 3.4.1 (compiled myself) on Ubuntu 12.04.>>> help(str)Ctrl-C:Traceback (most recent call last):  File "<stdin>", line 1, in <module>  File "/usr/local/lib/python3.4/_sitebuiltins.py", line 103, in __call__    return pydoc.help(*args, **kwds)  File "/usr/local/lib/python3.4/pydoc.py", line 1817, in __call__    self.help(request)  File "/usr/local/lib/python3.4/pydoc.py", line 1867, in help    else: doc(request, 'Help on %s:', output=self._output)  File "/usr/local/lib/python3.4/pydoc.py", line 1603, in doc    pager(render_doc(thing, title, forceload))  File "/usr/local/lib/python3.4/pydoc.py", line 1411, in pager    pager(text)  File "/usr/local/lib/python3.4/pydoc.py", line 1431, in <lambda>    return lambda text: pipepager(text, 'less')  File "/usr/local/lib/python3.4/pydoc.py", line 1453, in pipepager    pipe.close()  File "/usr/local/lib/python3.4/os.py", line 957, in close    returncode = self._proc.wait()  File "/usr/local/lib/python3.4/subprocess.py", line 1565, in wait    (pid, sts) = self._try_wait(0)  File "/usr/local/lib/python3.4/subprocess.py", line 1513, in _try_wait    (pid, sts) = _eintr_retry_call(os.waitpid, self.pid, wait_flags)  File "/usr/local/lib/python3.4/subprocess.py", line 491, in _eintr_retry_call    return func(*args)KeyboardInterrupt