Windowed BIT_XOR returns 1 for BIGINT UNSIGNED value 4294967296

CREATE DATABASE window_bits;

USE window_bits;

CREATE TABLE bit_values(v BIGINT UNSIGNED);

INSERT INTO bit_values VALUES(4294967296);

SELECT 'minimal' AS phase,BIT_XOR(v) OVER () AS actual,v AS expected FROM bit_values;

SELECT 'ordinary' AS phase,BIT_XOR(v) AS actual,4294967296 AS expected FROM bit_values;

SELECT 'controls' AS phase,BIT_OR(v) OVER () AS actual_or,BIT_AND(v) OVER () AS actual_and,v AS expected FROM bit_values;

DROP DATABASE window_bits;

SELECT 'cleanup' AS phase,COUNT(*) AS remaining FROM information_schema.SCHEMATA WHERE SCHEMA_NAME='window_bits';

phase	actual	expected

minimal	1	4294967296

phase	actual	expected

ordinary	4294967296	4294967296

phase	actual_or	actual_and	expected

controls	4294967296	4294967296	4294967296

phase	remaining

cleanup	0