Joining two text/longtext/blob/longblob columns returns an internal error.

Build tested:

[root@localhost mariadb-columnstore-server]# git show
commit 5a090c64bced6532578dd8910f15530fd37fce2c
Merge: 9efb0a7 b062156
Author: david hill <david.hill@mariadb.com>
Date: Thu Apr 27 16:13:15 2017 -0500

Merge pull request #45 from mariadb-corporation/FixPackageName

Change the package name to match engines format

[root@localhost mariadb-columnstore-server]# cd mariadb-columnstore-engine/
[root@localhost mariadb-columnstore-engine]# git show
commit cb788c0be215ad30e77e35298142fef43c61e70e
Merge: 775c605 de06c48
Author: dhall-InfiniDB <david.hall@mariadb.com>
Date: Wed May 3 09:43:29 2017 -0500

Merge pull request #163 from mariadb-corporation/MCOL-697

MCOL-697 Remove 64KB VARCHAR response limit

MariaDB [mytest]> truncate text1;
Query OK, 0 rows affected (0.10 sec)

MariaDB [mytest]> truncate text2;
Query OK, 0 rows affected (0.08 sec)

MariaDB [mytest]> insert into text1 values (1, "this is a test");
Query OK, 1 row affected (0.09 sec)

MariaDB [mytest]> insert into text2 values (1, "this is a test");
Query OK, 1 row affected (0.09 sec)

MariaDB [mytest]> select 'text1' as tableName, length(t1.c2) from text1 t1, text2 t2 where t1.c2 = t2.c2;
ERROR 1815 (HY000): Internal error: IDB-2035: An internal error occurred. Check the error log file & contact support.
MariaDB [mytest]> desc text1;
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