REPL errors out on numpy.array initialization expression #879
Description
As the user starts typing a numpy.array initialization expression, the REPL produces a TypeError and exits.
Consider the following example, where the error is produced when the user tries to type np.array([1, 2:
(env) /Users/georgepf>bpython
bpython version 0.20.1 on top of Python 3.9.1 /Users/georgepf/env/bin/python3
>>> import numpy as np
>>> np.array([1,
Traceback (most recent call last):
File "/Users/georgepf/env/bin/bpython", line 8, in <module>
sys.exit(main())
File "/Users/georgepf/env/lib/python3.9/site-packages/bpython/curtsies.py", line 221, in main
exit_value = repl.mainloop(True, paste)
File "/Users/georgepf/env/lib/python3.9/site-packages/bpython/curtsies.py", line 133, in mainloop
self.process_event_and_paint(e)
File "/Users/georgepf/env/lib/python3.9/site-packages/bpython/curtsies.py", line 97, in process_event_and_paint
self.process_event(e)
File "/Users/georgepf/env/lib/python3.9/site-packages/bpython/curtsiesfrontend/repl.py", line 658, in process_event
return self.process_key_event(e)
File "/Users/georgepf/env/lib/python3.9/site-packages/bpython/curtsiesfrontend/repl.py", line 825, in process_key_event
self.add_normal_character(e)
File "/Users/georgepf/env/lib/python3.9/site-packages/bpython/curtsiesfrontend/repl.py", line 1111, in add_normal_character
self.cursor_offset += 1
File "/Users/georgepf/env/lib/python3.9/site-packages/bpython/curtsiesfrontend/repl.py", line 1821, in _set_cursor_offset
self.update_completion()
File "/Users/georgepf/env/lib/python3.9/site-packages/bpython/curtsiesfrontend/repl.py", line 1143, in update_completion
self.list_win_visible = self.complete(tab)
File "/Users/georgepf/env/lib/python3.9/site-packages/bpython/repl.py", line 770, in complete
self.matches_iter.update(
File "/Users/georgepf/env/lib/python3.9/site-packages/bpython/repl.py", line 356, in update
self.start, self.end, self.current_word = self.completer.locate(
TypeError: cannot unpack non-iterable NoneType object
(env) /Users/georgepf>
This was on an M1 MacBook Pro running macOS Big Sur 11.1, python 3.9.1 and bpython are running natively on Apple silicon, numpy is 1.21.0 compiled locally for M1.