The PoC is generated by my DBMS fuzzer. It can also be reproduced in the beta docker image.
```SQL
CREATE TABLE x ( x INT PRIMARY KEY CHECK ( CASE WHEN x = ( SELECT x FROM x WHERE ( 'x' ) GROUP BY x HAVING x ( ) > 1 OR x ( x ) = x ( x ) ) THEN 'x' WHEN x > 1 OR CASE WHEN ( SELECT 1 FROM ( SELECT x ( x ( x ) , x ) ISNULL FROM x ORDER BY - x , x ) AS x WHERE x = 'x' OR x ( x ( ) ) = x OR x = 'x' GROUP BY x , x , x ) THEN ( - x ( 1 ) ) ELSE ( 1 * x ) END AND - x ( 1 ) >= x OR ( SELECT x FROM ( SELECT x ) AS x WHERE x = ( SELECT x FROM x AS x JOIN x ON ( ( ( SELECT x ( x , CASE WHEN 1 THEN 'x' WHEN x = 1 AND x ( 1.000000 ) AND x = 1 AND x = 1 OR x = 1 AND ( x = 1 OR x = 1 OR x = 1 ) THEN 'x' ELSE 'x' END , CASE 1 WHEN 1 THEN 'x' WHEN 1 THEN 'x' ELSE 'x' END ) , 1 , 'x' ) ) , 1 ) = x WHERE ( - 'x' >= x AND x = 1 * 1 ) ) ) THEN 'x' ELSE 'x' END ) ) ;
 INSERT INTO x ( x ) VALUES ( 78 ) ;
```

backtrace:
```c
#0 0x87936b (sslr_qst_get+0x65b)
#1 0x75ba77 (code_vec_run_1+0xe97)
#2 0x7af051 (qn_input+0x3c1)
#3 0x7c328a (qr_subq_exec+0x94a)
#4 0x7e296c (trig_call_1+0x29c)
#5 0x7e2dcb (trig_call+0x12b)
#6 0x7e38fa (trig_wrapper+0x1ba)
#7 0x7b6ab7 (insert_node_input+0xb7)
#8 0x7af05e (qn_input+0x3ce)
#9 0x7af05e (qn_input+0x3ce)
#10 0x7c1be9 (qr_dml_array_exec+0x839)
#11 0x7ce602 (sf_sql_execute+0x15d2)
#12 0x7cecde (sf_sql_execute_w+0x17e)
#13 0x7d799d (sf_sql_execute_wrapper+0x3d)
#14 0xe214bc (future_wrapper+0x3fc)
#15 0xe28dbe (_thread_boot+0x11e)
#16 0x7f9292052609 (start_thread+0xd9)
#17 0x7f9291e22133 (clone+0x43)
```

ways to reproduce (write poc to the file /tmp/test.sql first):
```bash
# remove the old one
docker container rm virtdb_test -f
# start virtuoso through docker
docker run --name virtdb_test -itd --env DBA_PASSWORD=dba  pkleef/virtuoso-opensource-7
# 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
cat /tmp/test.sql | docker exec -i virtdb_test isql 1111 dba
```
Fuzzer: Virtuoso 7.2.11 crashed at `sslr_qst_get`
This is a GitHub Issue
repo:virtuoso-opensource
owner:openlink
Title : Fuzzer: Virtuoso 7.2.11 crashed at `sslr_qst_get`
Issue date:

--- start body ---
The PoC is generated by my DBMS fuzzer. It can also be reproduced in the beta docker image.
```SQL
CREATE TABLE x ( x INT PRIMARY KEY CHECK ( CASE WHEN x = ( SELECT x FROM x WHERE ( 'x' ) GROUP BY x HAVING x ( ) > 1 OR x ( x ) = x ( x ) ) THEN 'x' WHEN x > 1 OR CASE WHEN ( SELECT 1 FROM ( SELECT x ( x ( x ) , x ) ISNULL FROM x ORDER BY - x , x ) AS x WHERE x = 'x' OR x ( x ( ) ) = x OR x = 'x' GROUP BY x , x , x ) THEN ( - x ( 1 ) ) ELSE ( 1 * x ) END AND - x ( 1 ) >= x OR ( SELECT x FROM ( SELECT x ) AS x WHERE x = ( SELECT x FROM x AS x JOIN x ON ( ( ( SELECT x ( x , CASE WHEN 1 THEN 'x' WHEN x = 1 AND x ( 1.000000 ) AND x = 1 AND x = 1 OR x = 1 AND ( x = 1 OR x = 1 OR x = 1 ) THEN 'x' ELSE 'x' END , CASE 1 WHEN 1 THEN 'x' WHEN 1 THEN 'x' ELSE 'x' END ) , 1 , 'x' ) ) , 1 ) = x WHERE ( - 'x' >= x AND x = 1 * 1 ) ) ) THEN 'x' ELSE 'x' END ) ) ;
 INSERT INTO x ( x ) VALUES ( 78 ) ;
```

backtrace:
```c
#0 0x87936b (sslr_qst_get+0x65b)
#1 0x75ba77 (code_vec_run_1+0xe97)
#2 0x7af051 (qn_input+0x3c1)
#3 0x7c328a (qr_subq_exec+0x94a)
#4 0x7e296c (trig_call_1+0x29c)
#5 0x7e2dcb (trig_call+0x12b)
#6 0x7e38fa (trig_wrapper+0x1ba)
#7 0x7b6ab7 (insert_node_input+0xb7)
#8 0x7af05e (qn_input+0x3ce)
#9 0x7af05e (qn_input+0x3ce)
#10 0x7c1be9 (qr_dml_array_exec+0x839)
#11 0x7ce602 (sf_sql_execute+0x15d2)
#12 0x7cecde (sf_sql_execute_w+0x17e)
#13 0x7d799d (sf_sql_execute_wrapper+0x3d)
#14 0xe214bc (future_wrapper+0x3fc)
#15 0xe28dbe (_thread_boot+0x11e)
#16 0x7f9292052609 (start_thread+0xd9)
#17 0x7f9291e22133 (clone+0x43)
```

ways to reproduce (write poc to the file /tmp/test.sql first):
```bash
# remove the old one
docker container rm virtdb_test -f
# start virtuoso through docker
docker run --name virtdb_test -itd --env DBA_PASSWORD=dba  pkleef/virtuoso-opensource-7
# 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
cat /tmp/test.sql | docker exec -i virtdb_test isql 1111 dba
```
--- end body ---
