lol.py

def note_error(self, *msg):
    if self.strict:
        raise PermError(*msg)
    # if lax mode, note error and continue
    if not self.perm_error:
        try:
            raise PermError(*msg)
        except PermError as x:
            # FIXME: keep a list of errors for even friendlier diagnostics.
            self.perm_error = x
    return self.perm_error