The PoC is generated by my DBMS fuzzer. It can also be reproduced in the beta docker image.
```SQL
CREATE TABLE v0 ( v1 REAL ) ;
 UPDATE v0 SET v1 = v1 + ( SELECT 2 AS zero_value DATE ) WHERE v1 IN ( SELECT 2 - v1 FROM v0 ) ;
```

backtrace:
```c
#0 0x87f42d (qst_vec_set_copy+0x69d)
#1 0x88504b (vec_ssl_assign+0x56b)
#2 0x7540c2 (code_vec_run_v+0xe12)
#3 0x7af01f (qn_input+0x38f)
#4 0x7af4c6 (qn_send_output+0x236)
#5 0x8214bd (set_ctr_vec_input+0x99d)
#6 0x7af05e (qn_input+0x3ce)
#7 0x751d38 (subq_next+0x258)
#8 0x8201a2 (ins_vec_subq+0x2a2)
#9 0x753c6b (code_vec_run_v+0x9bb)
#10 0x7af01f (qn_input+0x38f)
#11 0x7af4c6 (qn_send_output+0x236)
#12 0x8214bd (set_ctr_vec_input+0x99d)
#13 0x7af05e (qn_input+0x3ce)
#14 0x7c1be9 (qr_dml_array_exec+0x839)
#15 0x7ce602 (sf_sql_execute+0x15d2)
#16 0x7cecde (sf_sql_execute_w+0x17e)
#17 0x7d799d (sf_sql_execute_wrapper+0x3d)
#18 0xe214bc (future_wrapper+0x3fc)
#19 0xe28dbe (_thread_boot+0x11e)
#20 0x7fcdce3e4609 (start_thread+0xd9)
#21 0x7fcdce1b4133 (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 `qst_vec_set_copy`
This is a GitHub Issue
repo:virtuoso-opensource
owner:openlink
Title : Fuzzer: Virtuoso 7.2.11 crashed at `qst_vec_set_copy`
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 v0 ( v1 REAL ) ;
 UPDATE v0 SET v1 = v1 + ( SELECT 2 AS zero_value DATE ) WHERE v1 IN ( SELECT 2 - v1 FROM v0 ) ;
```

backtrace:
```c
#0 0x87f42d (qst_vec_set_copy+0x69d)
#1 0x88504b (vec_ssl_assign+0x56b)
#2 0x7540c2 (code_vec_run_v+0xe12)
#3 0x7af01f (qn_input+0x38f)
#4 0x7af4c6 (qn_send_output+0x236)
#5 0x8214bd (set_ctr_vec_input+0x99d)
#6 0x7af05e (qn_input+0x3ce)
#7 0x751d38 (subq_next+0x258)
#8 0x8201a2 (ins_vec_subq+0x2a2)
#9 0x753c6b (code_vec_run_v+0x9bb)
#10 0x7af01f (qn_input+0x38f)
#11 0x7af4c6 (qn_send_output+0x236)
#12 0x8214bd (set_ctr_vec_input+0x99d)
#13 0x7af05e (qn_input+0x3ce)
#14 0x7c1be9 (qr_dml_array_exec+0x839)
#15 0x7ce602 (sf_sql_execute+0x15d2)
#16 0x7cecde (sf_sql_execute_w+0x17e)
#17 0x7d799d (sf_sql_execute_wrapper+0x3d)
#18 0xe214bc (future_wrapper+0x3fc)
#19 0xe28dbe (_thread_boot+0x11e)
#20 0x7fcdce3e4609 (start_thread+0xd9)
#21 0x7fcdce1b4133 (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 ---
