CREATE TABLE bug51920 (i INT) ENGINE=InnoDB;
INSERT INTO bug51920 VALUES (1);
BEGIN;
SELECT * FROM bug51920 FOR UPDATE;
i
1
connect  con1,localhost,root,,;
connection con1;
UPDATE bug51920 SET i=2;
connection default;
SELECT ID FROM INFORMATION_SCHEMA.PROCESSLIST
WHERE INFO="UPDATE bug51920 SET i=2"
INTO @thread_id;
Warnings:
Warning	1287	'<select expression> INTO <destination>;' is deprecated and will be removed in a future release. Please use 'SELECT <select list> INTO <destination> FROM...' instead
KILL @thread_id;
connection con1;
Got one of the listed errors
connection default;
DROP TABLE bug51920;
disconnect con1;