Various parser crashes on random input

[jonathanslenders]

Looks like there are multiple bugs in streams.py and screens.py that cause crashes when feeding random terminal input.

I was testing something, so I created a 100MB file with random content:

dd if=/dev/random of=bigfile bs=1024 count=102400

Then I was feeding this to the input of the stream. Multiple errors occured:

TypeError: insert_lines() got an unexpected keyword argument 'private' 

  File ".../site-packages/pyte/streams.py", line 205, in feed
    taking_plain_text = send(data[offset:offset + 1])
  File ".../site-packages/pyte/streams.py", line 213, in _send_to_parser
    return self._parser.send(data)
           ~~~~~~~~~~~~~~~~~^^^^^^
  File ".../site-packages/pyte/streams.py", line 347, in _parser_fsm
    params.append(min(int(current or 0), 9999))
                      ~~~^^^^^^^^^^^^^^
ValueError: invalid literal for int() with base 10: '³'

  File ".../site-packages/pyte/streams.py", line 205, in feed
    taking_plain_text = send(data[offset:offset + 1])
  File ".../site-packages/pyte/streams.py", line 213, in _send_to_parser
    return self._parser.send(data)
           ~~~~~~~~~~~~~~~~~^^^^^^
  File ".../site-packages/pyte/streams.py", line 355, in _parser_fsm
    csi_dispatch[char](*params)
                                                                                                                                                                                                                                                  ~~~~~~~~~~~~~~~~~~^^^^^^^^^
TypeError: cursor_down() takes from 1 to 2 positional arguments but 3 were given

There were others. I don't think it makes sense to list them all. But I guess it would be good at some point to either run a fuzzer over the parser, or feed huge random files until it doesn't crash anymore on any input.

Note: this is not an hypothetical issue. Anyone can cat some/binary/file into the terminal.

[jonathanslenders]

Script to reproduce:

import pyte
import random

stream = pyte.Stream(pyte.Screen(80, 24))

while True:
    data = ''.join(chr(random.randint(0, 255)) for _ in range(1000))
    stream.feed(data)

Result:

Traceback (most recent call last):
  File ".../test-pyte.py", line 8, in <module>
    stream.feed(data)
    ~~~~~~~~~~~^^^^^^
  File ".../pyte/streams.py", line 205, in feed
    taking_plain_text = send(data[offset:offset + 1])
  File ".../pyte/streams.py", line 213, in _send_to_parser
    return self._parser.send(data)
           ~~~~~~~~~~~~~~~~~^^^^^^
  File ".../pyte/streams.py", line 358, in _parser_fsm
    csi_dispatch[char](*params)
    ~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File ".../pyte/screens.py", line 798, in erase_in_display
    self.dirty.update(interval)
                      ^^^^^^^^
UnboundLocalError: cannot access local variable 'interval' where it is not associated with a value