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[commands] reset view when Optional argument encounters parsing error

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Sebastian Law 2021-08-19 16:56:28 -07:00 committed by GitHub
parent f3cb197429
commit 1d2eaf8526
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1 changed files with 8 additions and 1 deletions
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discord/ext/commands/core.py
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@ -564,7 +564,14 @@ class Command(_BaseCommand, Generic[CogT, P, T]):
if consume_rest_is_special: if consume_rest_is_special:
argument = view.read_rest().strip() argument = view.read_rest().strip()
else: else:
argument = view.get_quoted_word() try:
argument = view.get_quoted_word()
except ArgumentParsingError as exc:
if self._is_typing_optional(param.annotation):
view.index = previous
return None
else:
raise exc
view.previous = previous view.previous = previous
# type-checker fails to narrow argument # type-checker fails to narrow argument