Error: Freeing overrun buffer, Freeing unallocated data or underrun buffer

CREATE TABLE t1 (c CHAR(255));

INSERT INTO t1 VALUES (REPEAT('a',255)),(REPEAT('b',255)),(REPEAT('c',255)),(REPEAT('d',255));

INSERT INTO t1 SELECT * FROM t1;

INSERT INTO t1 SELECT * FROM t1;

INSERT INTO t1 SELECT * FROM t1;

INSERT INTO t1 SELECT * FROM t1;

INSERT INTO t1 SELECT * FROM t1;

ALTER TABLE t1 ADD COLUMN vcol CHAR(255) AS (c) VIRTUAL, ADD INDEX IF NOT EXISTS (vcol);

Error: Freeing unallocated data or underrun buffer 0x7ff555ba60ad, 0x7ff555b972ca, 0x7ff555b28b48, 0x7ff555b1af5a, 0x7ff555b1bb17, 0x7ff555b1713c, 0x7ff5553a5055, 0x7ff5553ff8f9

Error: Freeing overrun buffer  0x7ff555ba60ad, 0x7ff555b972ca, 0x7ff555b28b72, 0x7ff555b1af5a, 0x7ff555b1bb17, 0x7ff555b1713c, 0x7ff5553a5055, 0x7ff5553ff8f9

Allocated at 0x7ff555b97521, 0x7ff555b384a7, 0x7ff555b27b47, 0x7ff555b1af5a, 0x7ff555b1bb17, 0x7ff555b1713c, 0x7ff5553a5055, 0x7ff5553ff8f9