Function _raise_chained_errors

src/filelock/_api.py:246–267

(first_error: BaseException, second_error: BaseException | None = None)

def _raise_chained_errors(first_error: BaseException, second_error: BaseException | None = None) -> NoReturn:
    if second_error is None:
        first_context = first_error.__context__
        try:
            raise first_error  # ruff:ignore[raise-within-try]  # the handler restores caller-supplied context before propagation
        except BaseException:
            first_error.__context__ = first_context
            raise
    if (second_context := second_error.__context__) is not None and second_context is not first_error:
        _detach_exception_context(second_context, first_error)
        _append_exception_context(first_error, second_context)
    first_context = first_error.__context__
    try:
        raise first_error  # ruff:ignore[raise-within-try]  # the second raise needs this error as implicit context
    except BaseException:  # ruff:ignore[blind-except]  # first_error may be a control-flow exception
        first_error.__context__ = first_context
        try:
            raise second_error  # ruff:ignore[raise-within-try]  # the handler makes the chain interpreter-independent
        except BaseException:
            second_error.__context__ = first_error
            first_error.__context__ = first_context
            raise


def _detach_exception_context(error: BaseException, target: BaseException) -> None: