Unexpected deadlock when one of the two transactions does not acquire any locks

/*init*/ CREATE TABLE t(c1 INT PRIMARY KEY);

/*init*/ INSERT INTO t(c1) VALUES (3);

/* t1 */ BEGIN;

/* t1 */ UPDATE t SET c1=2 WHERE -5;

/* t2 */ BEGIN;

/* t2 */ DELETE FROM t WHERE -3;  -- blocked

/* t1 */ UPDATE t SET c1=1 WHERE 3;

/* t2 */ Error 1213: Deadlock found when trying to get lock; try restarting transaction

/* t1 */ COMMIT;

/* t2 */ COMMIT;

/* t2 */ SELECT * FROM t;  -- [(1)]