Auto-repair doesn't work under LOCK TABLES

--- a/mysql-test/t/myisam_recover.test

+++ b/mysql-test/t/myisam_recover.test

@@ -88,6 +88,8 @@ flush table t1;

 --remove_file $MYSQLD_DATADIR/test/t1.MYI

 --copy_file $MYSQLD_DATADIR/test/t1_copy.MYI $MYSQLD_DATADIR/test/t1.MYI

 --remove_file $MYSQLD_DATADIR/test/t1_copy.MYI

+lock tables t1 write, t1_mrg write;

+flush table t1;

 --echo # check table is needed to mark the table as crashed.

 check table t1;

 --echo #

@@ -100,6 +102,8 @@ select * from t1_mrg;

 --echo #

 --echo # Cleanup

 --echo #

+unlock tables;

+select * from t1_mrg;

 drop table t1, t1_mrg;

 connection con1;

 unlock tables;

--- /home/midenok/src/mariadb/10.2/src/mysql-test/r/myisam_recover.result       2019-11-07 10:25:52.814204742 +0300

+++ /home/midenok/src/mariadb/10.2/src/mysql-test/r/myisam_recover.reject       2020-04-18 18:38:52.040652191 +0300

@@ -66,6 +66,8 @@

 flush table t1;

 insert into  t1 (a) values (4), (5), (6);

 flush table t1;

+lock tables t1 write, t1_mrg write;

+flush table t1;

 # check table is needed to mark the table as crashed.

 check table t1;

 Table  Op      Msg_type        Msg_text

@@ -86,13 +88,22 @@

 4

 5

 6

-Warnings:

-Error  145     Table 't1' is marked as crashed and should be repaired

-Error  1194    Table 't1' is marked as crashed and should be repaired

-Error  1034    Number of rows changed from 3 to 6

 #

 # Cleanup

 #

+unlock tables;

+select * from t1_mrg;

+a

+1

+2

+3

+4

+5

+6

+Warnings:

+Error  145     Table './test/t1' is marked as crashed and should be repaired

+Error  1194    Table 't1' is marked as crashed and should be repaired

+Error  1034    Number of rows changed from 3 to 6

 drop table t1, t1_mrg;

 connection con1;

 unlock tables;