[Draft] Assertion `!rw_lock_own(dict_operation_lock, RW_LOCK_S)' failed in row_purge

mysqld: /home/travis/src/storage/innobase/row/row0purge.cc:1268: void row_purge(purge_node_t*, trx_undo_rec_t*, que_thr_t*): Assertion `!rw_lock_own(dict_operation_lock, RW_LOCK_S)' failed.

181226 13:51:25 [ERROR] mysqld got signal 6 ;

#7  0x00007f96d4d26c82 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6

#8  0x000055b19c628db7 in row_purge (node=0x55b1a0083ed8, undo_rec=0x55b1a0084aa8 "", thr=0x55b1a0083a30) at /home/travis/src/storage/innobase/row/row0purge.cc:1268

#9  0x000055b19c6290bd in row_purge_step (thr=0x55b1a0083a30) at /home/travis/src/storage/innobase/row/row0purge.cc:1347

#10 0x000055b19c5aa4c1 in que_thr_step (thr=0x55b1a0083a30) at /home/travis/src/storage/innobase/que/que0que.cc:1042

#11 0x000055b19c5aa6f4 in que_run_threads_low (thr=0x55b1a0083a30) at /home/travis/src/storage/innobase/que/que0que.cc:1104

#12 0x000055b19c5aa8e5 in que_run_threads (thr=0x55b1a0083a30) at /home/travis/src/storage/innobase/que/que0que.cc:1144

#13 0x000055b19c668ab0 in srv_task_execute () at /home/travis/src/storage/innobase/srv/srv0srv.cc:2449

#14 0x000055b19c668c55 in srv_worker_thread (arg=0x0) at /home/travis/src/storage/innobase/srv/srv0srv.cc:2497

#15 0x00007f96d596b6ba in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0

#16 0x00007f96d4e0041d in clone () from /lib/x86_64-linux-gnu/libc.so.6

perl ./runall-new.pl --basedir=/home/travis/server --vardir=/home/travis/logs/vardir --duration=350 --threads=6 --seed=1545832264 --reporters=Backtrace,ErrorLog,Deadlock --validators=TransformerNoComparator --views --redefine=conf/mariadb/alter_table.yy --redefine=conf/mariadb/instant_add.yy --redefine=conf/mariadb/sp.yy --redefine=conf/mariadb/bulk_insert.yy --redefine=conf/mariadb/sequences.yy --redefine=conf/mariadb/modules/admin.yy --redefine=conf/mariadb/modules/userstat.yy --redefine=conf/mariadb/modules/foreign_keys.yy -redefine=conf/mariadb/modules/locks.yy --redefine=conf/mariadb/modules/locks-10.4-extra.yy --redefine=conf/mariadb/modules/alter_table_columns.yy --mysqld=--log_output=FILE --mysqld=--max-statement-time=30 --mysqld=--lock-wait-timeout=10 --mysqld=--loose-innodb-lock-wait-timeout=5 --mysqld=--loose-debug_assert_on_not_freed_memory=0 --grammar=conf/partitioning/partition_pruning.yy --gendata=conf/partitioning/partition_pruning.zz --skip-gendata --gendata-advanced --vcols --transformers=ExecuteAsIntersect,ExecuteAsExcept,ExecuteAsCTE,ExecuteAsExecuteImmediate,ExecuteAsDeleteReturning,ExecuteAsInsertSelect,ExecuteAsUnion,ExecuteAsUpdateDelete,ExecuteAsView,ExecuteAsPreparedTwice --redefine=conf/mariadb/versioning.yy --filter=/home/travis/mariadb-toolbox/travis/10.4-combo-filter.ff