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#
# MDEV-21259 Assertion 'w != NORMAL || mach_read_from_4(ptr) != val'
# failed in mtr_t::write(), btr_free_externally_stored_field()
#
CREATE TABLE t1 (c TEXT, f2 INT PRIMARY KEY, f3 INT UNIQUE)
ENGINE=InnoDB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=4;
SET @level= @@GLOBAL.innodb_compression_level;
SET GLOBAL innodb_compression_level=0;
connect prevent_purge,localhost,root;
START TRANSACTION WITH CONSISTENT SNAPSHOT;
connection default;
INSERT INTO t1 VALUES('a',1,0);
UPDATE t1 SET c= REPEAT('a b ',4096);
REPLACE INTO t1 SELECT * FROM t1;
disconnect prevent_purge;
InnoDB 0 transactions not purged
DROP TABLE t1;
SET GLOBAL innodb_compression_level = @level;
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