The PoC is generated by my DBMS fuzzer. It can also be reproduced in the beta docker image.
```SQL
CREATE TABLE v0 ( v1 nvarchar ) ; 
 UPDATE v0 SET v1 = v1 + 1 WHERE v1 IN ( SELECT xmlagg ( ABS ( 9 ) ) FROM v0 GROUP BY v1 ORDER BY v1 ) ; 
```

backtrace:
```c
#0 0x703d90 (sqlo_strip_in_join+0x60)
#1 0x704163 (sqlo_strip_in_join+0x433)
#2 0x704163 (sqlo_strip_in_join+0x433)
#3 0x704163 (sqlo_strip_in_join+0x433)
#4 0x704163 (sqlo_strip_in_join+0x433)
#5 0x704163 (sqlo_strip_in_join+0x433)
#6 0x704163 (sqlo_strip_in_join+0x433)
#7 0x704163 (sqlo_strip_in_join+0x433)
#8 0x704163 (sqlo_strip_in_join+0x433)
#9 0x7047a4 (sqlo_try_in_loop+0x264)
#10 0x7097fc (sqlo_try+0x25c)
#11 0x70ac5c (sqlo_layout_1+0x94c)
#12 0x6eadab (sqlo_layout+0x5fb)
#13 0x70eb45 (sqlo_top_2+0x335)
#14 0x70e465 (sqlo_top_1+0xf5)
#15 0x7101b1 (sqlo_query_spec+0x1a1)
#16 0x7e0258 (sqlc_update_searched+0x548)
#17 0x6b9ac2 (sql_stmt_comp+0x812)
#18 0x6bc9d2 (sql_compile_1+0x1a62)
#19 0x7cba60 (stmt_set_query+0x340)
#20 0x7cd952 (sf_sql_execute+0x922)
#21 0x7cecde (sf_sql_execute_w+0x17e)
#22 0x7d799d (sf_sql_execute_wrapper+0x3d)
#23 0xe214bc (future_wrapper+0x3fc)
#24 0xe28dbe (_thread_boot+0x11e)
#25 0x7f4011482609 (start_thread+0xd9)
#26 0x7f4011252133 (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 `sqlo_strip_in_join`
This is a GitHub Issue
repo:virtuoso-opensource
owner:openlink
Title : Fuzzer: Virtuoso 7.2.11 crashed at `sqlo_strip_in_join`
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 nvarchar ) ; 
 UPDATE v0 SET v1 = v1 + 1 WHERE v1 IN ( SELECT xmlagg ( ABS ( 9 ) ) FROM v0 GROUP BY v1 ORDER BY v1 ) ; 
```

backtrace:
```c
#0 0x703d90 (sqlo_strip_in_join+0x60)
#1 0x704163 (sqlo_strip_in_join+0x433)
#2 0x704163 (sqlo_strip_in_join+0x433)
#3 0x704163 (sqlo_strip_in_join+0x433)
#4 0x704163 (sqlo_strip_in_join+0x433)
#5 0x704163 (sqlo_strip_in_join+0x433)
#6 0x704163 (sqlo_strip_in_join+0x433)
#7 0x704163 (sqlo_strip_in_join+0x433)
#8 0x704163 (sqlo_strip_in_join+0x433)
#9 0x7047a4 (sqlo_try_in_loop+0x264)
#10 0x7097fc (sqlo_try+0x25c)
#11 0x70ac5c (sqlo_layout_1+0x94c)
#12 0x6eadab (sqlo_layout+0x5fb)
#13 0x70eb45 (sqlo_top_2+0x335)
#14 0x70e465 (sqlo_top_1+0xf5)
#15 0x7101b1 (sqlo_query_spec+0x1a1)
#16 0x7e0258 (sqlc_update_searched+0x548)
#17 0x6b9ac2 (sql_stmt_comp+0x812)
#18 0x6bc9d2 (sql_compile_1+0x1a62)
#19 0x7cba60 (stmt_set_query+0x340)
#20 0x7cd952 (sf_sql_execute+0x922)
#21 0x7cecde (sf_sql_execute_w+0x17e)
#22 0x7d799d (sf_sql_execute_wrapper+0x3d)
#23 0xe214bc (future_wrapper+0x3fc)
#24 0xe28dbe (_thread_boot+0x11e)
#25 0x7f4011482609 (start_thread+0xd9)
#26 0x7f4011252133 (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 ---
