If the following code is typed very quickly after bpython-curtsies invocation, import completion has not yet finished, and bpython crashes:
$ bpython-curtsies
>>> import os

#!python

tom-mba:~ tomb$ bpython-curtsies
>>> import o
Traceback (most recent call last):
  File "/usr/local/bin/bpython-curtsies", line 9, in <module>
    load_entry_point('bpython==mercurial', 'console_scripts', 'bpython-curtsies')()
  File "/Users/tomb/Dropbox/code/bpython/bpython/curtsies.py", line 51, in main
    mainloop(config, locals_, banner, interp, paste)
  File "/Users/tomb/Dropbox/code/bpython/bpython/curtsies.py", line 88, in mainloop
    process_event(tc.get_event())
  File "/Users/tomb/Dropbox/code/bpython/bpython/curtsies.py", line 67, in process_event
    repl.process_event(e)
  File "/Users/tomb/Dropbox/code/bpython/bpython/curtsiesfrontend/repl.py", line 335, in process_event
    self.update_completion()
  File "/Users/tomb/Dropbox/code/bpython/bpython/curtsiesfrontend/repl.py", line 450, in update_completion
    self.list_win_visible = BpythonRepl.complete(self, tab)
  File "/Users/tomb/Dropbox/code/bpython/bpython/repl.py", line 588, in complete
    matches = importcompletion.complete(self.current_line(), cw)
  File "/Users/tomb/Dropbox/code/bpython/bpython/importcompletion.py", line 77, in complete
    for name in modules:
RuntimeError: Set changed size during iteration
tom-mba:~ tomb$

Import completion should happen in a coroutine instead of a thread, or there should be a lock around the import completion modules list that the import completion code gives up to allow keys to be pressed, or something.

• Bitbucket: https://bitbucket.org/bobf/bpython/issue/263
• Originally Reported By:
• Originally Created At: 2014-03-01T02:13:29.395