Getting server crash after running sqlsmith - Mailing list pgsql-hackers

Hi,
After runinng sqlsmith against latest sources of PG v10  , able to see a crash -

here is the standalone testcase -

Make sure 'logging_collector=on' in postgresql.conf file
Connect to psql terminal ,run this query
postgres=# select
          80 as c0,
          pg_catalog.pg_backend_pid() as c1,
          68 as c2,
          subq_1.c0 as c3,
          subq_1.c0 as c4
        from
          (select
                ref_0.specific_schema as c0
              from
                information_schema.role_routine_grants as ref_0,
                lateral (select
                      ref_0.grantor as c0,
                      50 as c1
                    from
                      information_schema.routines as ref_1
                    where (63 = 86)
                      or (pg_catalog.pg_advisory_lock(
                          cast(ref_1.result_cast_datetime_precision as integer),
                          cast(pg_catalog.bttidcmp(
                            cast(null as tid),
                            cast(null as tid)) as integer)) is NULL)
                    limit 143) as subq_0
              where pg_catalog.pg_rotate_logfile() is NULL) as subq_1
        where 50 <> 45;
 c0 | c1 | c2 | c3 | c4
----+----+----+----+----
(0 rows)

postgres=# select 1;
FATAL:  terminating connection due to unexpected postmaster exit
server closed the connection unexpectedly
    This probably means the server terminated abnormally
    before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.
!> \q

here is the stack trace -
[centos@tushar-centos bin]$ gdb -q -c mdata/core.4254 /home/centos/pg10_28march/postgresql/edbpsql/bin/postgres
Reading symbols from /home/centos/pg10_28march/postgresql/edbpsql/bin/postgres...done.
[New Thread 4254]
Missing separate debuginfo for
Try: yum --disablerepo='*' --enablerepo='*-debug*' install /usr/lib/debug/.build-id/5f/7d4ef6f6ba15505d3c42a7a09e2a7ca9ae5ba6
--
--
Loaded symbols for /lib/libkrb5support.so.0
Reading symbols from /lib/libkeyutils.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libkeyutils.so.1
Reading symbols from /lib/libselinux.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libselinux.so.1
Reading symbols from /lib/libnss_files.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libnss_files.so.2
Core was generated by `/home/centos/pg10_28march/postgresql/edbpsql/bin/postgres -D mdata'.
Program terminated with signal 11, Segmentation fault.
#0  0x00a75424 in __kernel_vsyscall ()
Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.132.el6.i686 keyutils-libs-1.4-5.el6.i686 krb5-libs-1.10.3-57.el6.i686 libcom_err-1.41.12-22.el6.i686 libselinux-2.0.94-7.el6.i686 openssl-1.0.1e-48.el6_8.4.i686 zlib-1.2.3-29.el6.i686
(gdb) bt
#0  0x00a75424 in __kernel_vsyscall ()
#1  0x00aa1d7b in sigprocmask () from /lib/libc.so.6
#2  0x083d2d79 in sigusr1_handler (postgres_signal_arg=10) at postmaster.c:5081
#3  <signal handler called>
#4  0x00a75424 in __kernel_vsyscall ()
#5  0x00aa1d7b in sigprocmask () from /lib/libc.so.6
#6  0x083d2d79 in sigusr1_handler (postgres_signal_arg=10) at postmaster.c:5081
#7  <signal handler called>
#8  0x00a75424 in __kernel_vsyscall ()
#9  0x00aa1d7b in sigprocmask () from /lib/libc.so.6
#10 0x083d2d79 in sigusr1_handler (postgres_signal_arg=10) at postmaster.c:5081
#11 <signal handler called>
#12 0x00a75424 in __kernel_vsyscall ()
--
--
#52380 0x00a75424 in __kernel_vsyscall ()
#52381 0x00aa1d7b in sigprocmask () from /lib/libc.so.6
#52382 0x083d2d79 in sigusr1_handler (postgres_signal_arg=10) at postmaster.c:5081
#52383 <signal handler called>
#52384 0x00a75424 in __kernel_vsyscall ()
#52385 0x00b5208d in ___newselect_nocancel () from /lib/libc.so.6
#52386 0x083ce40e in ServerLoop () at postmaster.c:1693
#52387 0x083cdbcb in PostmasterMain (argc=3, argv=0x957ca10) at postmaster.c:1337
#52388 0x083236fc in main (argc=3, argv=0x957ca10) at main.c:228

-- 
regards,tushar
EnterpriseDB  https://www.enterprisedb.com/
The Enterprise PostgreSQL Company