virtuoso 7.2.9 crashed at sqlc_make_policy_trig

[fuboat]

The PoC is generated by my DBMS fuzzer.

DELETE FROM ucview WHERE CURRENT OF c1;

backtrace:

#0 0x7d8904 (sqlc_make_policy_trig+0x54)
#1 0x7ddf99 (sqlc_delete_pos+0x2e9)
#2 0x6b6e53 (sql_stmt_comp+0x453)
#3 0x6ba122 (sql_compile_1+0x1a62)
#4 0x7c8cd0 (stmt_set_query+0x340)
#5 0x7cabc2 (sf_sql_execute+0x922)
#6 0x7cbf4e (sf_sql_execute_w+0x17e)
#7 0x7d4c0d (sf_sql_execute_wrapper+0x3d)
#8 0xe1f01c (future_wrapper+0x3fc)
#9 0xe2691e (_thread_boot+0x11e)
#10 0x7faabf70f609 (start_thread+0xd9)
#11 0x7faabf4df133 (clone+0x43)

ways to reproduce (write poc to the file '/tmp/test.sql' first):

# remove the old one
docker container rm virtdb_test -f
# start virtuoso through docker
docker run --name virtdb_test -itd --env DBA_PASSWORD=dba openlink/virtuoso-opensource-7:7.2.9
# wait the server starting
sleep 10
# check whether the simple query works
echo "SELECT 1;" | docker exec -i virtdb_test isql 1111 dba
# run the poc
docker exec -i virtdb_test isql 1111 dba < "/tmp/test.sql"