Case with endless loop with no way to interrupt

[anki-code]

Sometimes I'm facing with loops without the way to interrupt it (MacOS):

while 1:
    xonsh -c 'date; sleep 1'
# Ctrl-C
# KeyboardInterrupt
# Ctrl-C
# KeyboardInterrupt
# Ctrl-D
# ^D
# Ctrl-C
# KeyboardInterrupt
# ...
# No way to stop it.

We need to add the way to stop the execution.

For community

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[JamesParrott]

If this outer loop is run in xonsh, even if Ctrl+D quits the inner sleep process, the outer while loop will then immediately start another one. With fortunate timing and luck, perhaps it's rarely possible to quit the outer loop if the interrupt is processed just after the inner process ends and just before the next one starts.

while 1:
    xonsh -c 'date; sleep 1'

Is the idea to pass an interrupt from a xonsh process, to its calling process?
https://xon.sh/aliases.html#eof-exit-and-quit

[JamesParrott]

I think this functionality might even already exist. Or at the very least I can't reproduce the failure. Admittedly it can cause the outer interactive xonsh to hang, but I was able to quit the loop in MINGW64 Git Bash on Windows by simply spamming (not holding down) Ctrl+C:

@LAPTOP ~ @ while 1:
.........................   xonsh -c 'date; sleep 1'
.........................
Sun, Mar 17, 2024 12:01:35 PM
Sun, Mar 17, 2024 12:01:37 PM
Sun, Mar 17, 2024 12:01:39 PM

Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Users\\.local\bin\xonsh.exe\__main__.py", line 4, in <module>
  File "C:\Users\\.local\pipx\venvs\xonsh\Lib\site-packages\xonsh\main.py", line 2, in <module>
    import argparse
  File "C:\Users\\AppData\Local\Programs\Python\Python311\Lib\argparse.py", line 94, in <module>

    from gettext import gettext as _, ngettext
  File "<frozen importlib._bootstrap>", line 1176, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1138, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 1078, in _find_spec
  File "<frozen importlib._bootstrap_external>", line 1504, in find_spec
  File "<frozen importlib._bootstrap_external>", line 1476, in _get_spec
  File "<frozen importlib._bootstrap_external>", line 1612, in find_spec
  File "<frozen importlib._bootstrap_external>", line 147, in _path_stat
KeyboardInterrupt

@LAPTOP-~ @
@LAPTOP-~ @ print(_)

[anki-code]

Solved in #5380. Now $RAISE_SUBPROC_ERROR = True allows to achieve interrupting.