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% cat test_argparse_narrow.py
import argparse
argparse.ArgumentParser().print_help()
% COLUMNS=15 ./python test_argparse_narrow.py
Traceback (most recent call last):
 File "test_argparse_narrow.py", line 2, in <module>
 argparse.ArgumentParser().print_help()
 File "/home/zbyszek/python/cpython/Lib/argparse.py", line 2347, in print_help
 self._print_message(self.format_help(), file)
 File "/home/zbyszek/python/cpython/Lib/argparse.py", line 2321, in format_help
 return formatter.format_help()
 File "/home/zbyszek/python/cpython/Lib/argparse.py", line 276, in format_help
 help = self._root_section.format_help()
 File "/home/zbyszek/python/cpython/Lib/argparse.py", line 206, in format_help
 func(*args)
 File "/home/zbyszek/python/cpython/Lib/argparse.py", line 206, in format_help
 func(*args)
 File "/home/zbyszek/python/cpython/Lib/argparse.py", line 514, in _format_action
 help_lines = self._split_lines(help_text, help_width)
 File "/home/zbyszek/python/cpython/Lib/argparse.py", line 615, in _split_lines
 return _textwrap.wrap(text, width)
 File "/home/zbyszek/python/cpython/Lib/textwrap.py", line 316, in wrap
 return w.wrap(text)
 File "/home/zbyszek/python/cpython/Lib/textwrap.py", line 291, in wrap
 return self._wrap_chunks(chunks)
 File "/home/zbyszek/python/cpython/Lib/textwrap.py", line 220, in _wrap_chunks
 raise ValueError("invalid width %r (must be > 0)" % self.width)
ValueError: invalid width -1 (must be > 0)
argparse should not fail if the user resizes the window to something very thin...