500 ISE from emoji

[UTevZrmnvP]

When using emoji (not in markdown format) passed to the /standup command the server throws a 500. internal server error.

This may be the correct behavior, but could we have a more informative error instead ("input validation failed, see FAQ for known issues"?).

[cvitter]

Is this an issue you can tackle? PRs are welcome.

[howaminotme]

What are the steps to reproduce? I tried to test this and it seemed to work fine.

[cvitter]

@UTevZrmnvP can you provide the steps to reproduce?

[variablenix]

When testing with Python 2.7.12 the 500 internal error is reproducible if you include an emoji with the slash command.

/standup 👍 or any Unicode emoji will crash with the following output:

[2020-03-12 19:12:14,879] ERROR in app: Exception on /standup [POST]
Traceback (most recent call last):
  File "/home/user/.local/lib/python2.7/site-packages/flask/app.py", line 2292, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/user/.local/lib/python2.7/site-packages/flask/app.py", line 1815, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/user/.local/lib/python2.7/site-packages/flask/app.py", line 1718, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/user/.local/lib/python2.7/site-packages/flask/app.py", line 1813, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/user/.local/lib/python2.7/site-packages/flask/app.py", line 1799, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "standup.py", line 43, in slash_command
    form_text,
UnicodeEncodeError: 'ascii' codec can't encode character u'\U0001f61a' in position 0: ordinal not in range(128)
54.183.150.245 - - [12/Mar/2020 19:12:14] "POST /standup HTTP/1.1" 500 -

Note that the 500 error only happens when you paste in an emoji, but if you include an emoji like /standup :+1: then it does not error.