ipython crashes on import of nonexistent module

[staticfloat]

On OSX, if I attempt to import a nonexistent module, ipython crashes within _get_terminal_size.py:

$ ipython
Python 2.7.13 (default, Apr  4 2017, 08:47:57)
Type "copyright", "credits" or "license" for more information.

IPython 5.4.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]: import not_a_real_module
Traceback (most recent call last):
  File "/usr/local/bin/ipython", line 11, in <module>
    sys.exit(start_ipython())
  File "/usr/local/lib/python2.7/site-packages/IPython/__init__.py", line 119, in start_ipython
    return launch_new_instance(argv=argv, **kwargs)
  File "/Users/sabae/Library/Python/2.7/lib/python/site-packages/traitlets/config/application.py", line 658, in launch_instance
    app.start()
  File "/usr/local/lib/python2.7/site-packages/IPython/terminal/ipapp.py", line 355, in start
    self.shell.mainloop()
  File "/usr/local/lib/python2.7/site-packages/IPython/terminal/interactiveshell.py", line 493, in mainloop
    self.interact()
  File "/usr/local/lib/python2.7/site-packages/IPython/terminal/interactiveshell.py", line 484, in interact
    self.run_cell(code, store_history=True)
  File "/usr/local/lib/python2.7/site-packages/IPython/core/interactiveshell.py", line 2718, in run_cell
    interactivity=interactivity, compiler=compiler, result=result)
  File "/usr/local/lib/python2.7/site-packages/IPython/core/interactiveshell.py", line 2847, in run_ast_nodes
    self.showtraceback()
  File "/usr/local/lib/python2.7/site-packages/IPython/core/interactiveshell.py", line 1826, in showtraceback
    value, tb, tb_offset=tb_offset)
  File "/usr/local/lib/python2.7/site-packages/IPython/core/ultratb.py", line 1412, in structured_traceback
    self, etype, value, tb, tb_offset, number_of_lines_of_context)
  File "/usr/local/lib/python2.7/site-packages/IPython/core/ultratb.py", line 1320, in structured_traceback
    self, etype, value, tb, tb_offset, number_of_lines_of_context
  File "/usr/local/lib/python2.7/site-packages/IPython/core/ultratb.py", line 1170, in structured_traceback
    tb_offset)
  File "/usr/local/lib/python2.7/site-packages/IPython/core/ultratb.py", line 1107, in format_exception_as_a_whole
    head = self.prepare_header(etype, self.long_header)
  File "/usr/local/lib/python2.7/site-packages/IPython/core/ultratb.py", line 1041, in prepare_header
    width = min(75, get_terminal_size()[0])
  File "/usr/local/lib/python2.7/site-packages/IPython/utils/terminal.py", line 125, in get_terminal_size
    return _get_terminal_size((defaultx, defaulty))
  File "/usr/local/lib/python2.7/site-packages/IPython/utils/_get_terminal_size.py", line 80, in _get_terminal_size
    res = fcntl.ioctl(fd, termios.TIOCGWINSZ, b"\x00" * 4)
TypeError: argument must be an int, or have a fileno() method.

The error message goes on to tell me to try setting %config Application.verbose_crash=True, but that doesn't improve matters at all.

[Carreau]

Oups, Sight, We bundled get_terminal_size as namespace packages where missing/an issue, and I have an extra underscore somewhere. Fix comming.

[Carreau]

Can you try re-updateing ?

[Carreau]

I just released 5.4.1 on PyPI.

[staticfloat]

Confirmed fixed on 5.4.1. Thanks for the incredibly fast fix!