Inconsistent error upon updating read-only table with ROW_FORMAT=COMPRESSED

set global innodb_read_only_compressed= off;

create table t (a int) row_format=compressed;

insert into t values (1),(2),(3);

set global innodb_read_only_compressed= on;

insert into t values (4);

show warnings;

delete from t where a = 2;

show warnings;

drop table t;

MariaDB [db]> insert into t values (4);

ERROR 4047 (HY000): InnoDB refuses to write tables with ROW_FORMAT=COMPRESSED or KEY_BLOCK_SIZE.

MariaDB [db]> show warnings;

+-------+------+------------------------------------------------------------------------------+

| Level | Code | Message                                                                      |

+-------+------+------------------------------------------------------------------------------+

| Error | 4047 | InnoDB refuses to write tables with ROW_FORMAT=COMPRESSED or KEY_BLOCK_SIZE. |

| Error | 1036 | Table 't' is read only                                                       |

+-------+------+------------------------------------------------------------------------------+

2 rows in set (0.000 sec)

MariaDB [db]> delete from t where a = 2;

ERROR 1036 (HY000): Table 't' is read only

MariaDB [db]> show warnings;

+---------+------+------------------------------------------------------------------------------+

| Level   | Code | Message                                                                      |

+---------+------+------------------------------------------------------------------------------+

| Warning | 4047 | InnoDB refuses to write tables with ROW_FORMAT=COMPRESSED or KEY_BLOCK_SIZE. |

| Error   | 1036 | Table 't' is read only                                                       |

+---------+------+------------------------------------------------------------------------------+

2 rows in set (0.000 sec)

--source include/have_innodb.inc

set global innodb_read_only_compressed= off;

create table t (a int) engine=InnoDB row_format=compressed;

insert into t values (1),(2),(3);

set global innodb_read_only_compressed= on;

--error ER_UNSUPPORTED_COMPRESSED_TABLE

insert into t values (4);

show warnings;

--error ER_UNSUPPORTED_COMPRESSED_TABLE

delete from t where a = 2;

show warnings;

# Cleanup 

drop table t;