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New pyrepl gives a traceback on exit with "dumb" terminal #119102

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@dgrisby

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@dgrisby
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Bug report

Bug description:

I was experimenting with terminal types:

$ export TERM=dumb
$ python3
Python 3.13.0b1 (main, May 12 2024, 23:38:03) [GCC 13.2.1 20240316 (Red Hat 13.2.1-7)] on linux
Type "help", "copyright", "credits" or "license" for more information.
warning: can't use pyrepl: terminal doesn't have the required clear capability
>>> quit
Use quit() or Ctrl-D (i.e. EOF) to exit
>>> quit()
Exception ignored in atexit callback <function register_readline.<locals>.write_history at 0x7f7204f537e0>:
Traceback (most recent call last):
  File "<frozen site>", line 530, in write_history
  File "/home/duncan/py313inst/lib/python3.13/_pyrepl/readline.py", line 361, in write_history_file
    history = self.get_reader().get_trimmed_history(maxlength)
  File "/home/duncan/py313inst/lib/python3.13/_pyrepl/readline.py", line 277, in get_reader
    console = UnixConsole(self.f_in, self.f_out, encoding=ENCODING)
  File "/home/duncan/omni/py313inst/lib/python3.13/_pyrepl/unix_console.py", line 170, in __init__
    self._clear = _my_getstr("clear")
  File "/home/duncan/py313inst/lib/python3.13/_pyrepl/unix_console.py", line 163, in _my_getstr
    raise InvalidTerminal(
_pyrepl.unix_console.InvalidTerminal: terminal doesn't have the required clear capability

It notices that the terminal is unsuitable, but then tries to use it on exit.

CPython versions tested on:

3.13

Operating systems tested on:

Linux

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    3.13bugs and security fixesbugs and security fixestopic-replRelated to the interactive shellRelated to the interactive shelltype-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

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