Method fail

mypy/checker.py:8001–8007

Produce an error message.

(
        self, msg: str | ErrorMessage, context: Context, *, code: ErrorCode | None = None
    )

        return TempNode(t, context=context)

    def fail(
        self, msg: str | ErrorMessage, context: Context, *, code: ErrorCode | None = None
    ) -> ErrorInfo:
        """Produce an error message."""
        if isinstance(msg, ErrorMessage):
            return self.msg.fail(msg.value, context, code=msg.code)
        return self.msg.fail(msg, context, code=code)

    def note(
        self,