postgresql v11.1 Segmentation fault: signal 11: by running SELECT... JIT Issue?

[pabloa98 <pabloa98@xxxxxxxxx>]

Hello

I just migrated our databases from PostgreSQL version 9.6 to version 11.1. We got a segmentation fault while running this query:

SELECT f_2110 as x FROM baseline_denull

ORDER BY eid ASC

limit 500

OFFSET 131000;

It works in version 11,1 if offset + limit < 131000 approx (it is some number around it).

It works too if I disable jit (it was enabled). So this works:

set jit = 0;

SELECT f_2110 as x FROM baseline_denull

ORDER BY eid ASC

limit 500

OFFSET 131000;

It works all the time in version 9.6

The workaround seems to disable JIT. Is this a configuration problem or a bug?

We are using a compiled version of Postgres because we have tables (like this one) with thousands of columns.

This server was compiled as follows:

In Ubuntu 16.04:

sudo apt update
sudo apt install --yes libcrypto++-utils libssl-dev libcrypto++-dev libsystemd-dev libpthread-stubs0-dev libpthread-workqueue-dev
sudo apt install --yes docbook-xml docbook-xsl fop libxml2-utils xsltproc
sudo apt install --yes gcc zlib1g-dev libreadline6-dev make
sudo apt install --yes llvm-6.0 clang-6.0
sudo apt install --yes build-essential
sudo apt install --yes opensp
sudo locale-gen en_US.UTF-8

Download the source code:

mkdir -p ~/soft
cd ~/soft
wget https://ftp.postgresql.org/pub/source/v11.1/postgresql-11.1.tar.gz
tar xvzf postgresql-11.1.tar.gz
cd postgresql-11.1/

./configure --prefix=$HOME/soft/postgresql/postgresql-11 --with-extra-version=ps.2.0 --with-llvm --with-openssl --with-systemd --with-blocksize=32 --with-wal-blocksize=32 --with-system-tzdata=/usr/share/zoneinfo

make world
make check   # 11 tests fail. I assumed it is because the planner behaves differently because the change of blocksize.

make install-world

$HOME/soft/postgresql/postgresql-11/bin/initdb -D $HOME/soft/postgresql/postgresql-11/data/

Changes in ./data/postgresql.conf:

    listen_addresses = '*'
    max_connections = 300
    work_mem = 32MB
    maintenance_work_mem = 256MB
    shared_buffers = 1024MB
    log_timezone = 'US/Pacific'
    log_destination = 'csvlog'
    logging_collector = on
    log_filename = 'postgresql-%Y-%m-%d.log'
    log_rotation_size = 0
    log_min_duration_statement = 1000
    debug_print_parse = off
    debug_print_rewritten = off
    debug_print_plan = off
    log_temp_files = 100000000

    jit = on  # As a workaround, I turned off... but I want it on.

The database is created as:

CREATE DATABASE xxx
    WITH
    OWNER = user
    ENCODING = 'UTF8'
    LC_COLLATE = 'en_US.UTF-8'
    LC_CTYPE = 'en_US.UTF-8'
    TABLESPACE = pg_default
    CONNECTION LIMIT = -1;

the table baseline_denull has 1765 columns, mainly numbers, like:

CREATE TABLE public.baseline_denull
(
    eid integer,
    f_19 integer,
    f_21 integer,
    f_23 integer,
    f_31 integer,
    f_34 integer,
    f_35 integer,
    f_42 text COLLATE pg_catalog."default",
    f_43 text COLLATE pg_catalog."default",
    f_45 text COLLATE pg_catalog."default",
    f_46 integer,
    f_47 integer,
    f_48 double precision,
    f_49 double precision,
    f_50 double precision,
    f_51 double precision,
    f_52 integer,
    f_53 date,
    f_54 integer,
    f_68 integer,
    f_74 integer,
    f_77 double precision,
    f_78 double precision,
    f_84 integer[],
    f_87 integer[],
    f_92 integer[],
    f_93 integer[],
    f_94 integer[],
    f_95 integer[],
    f_96 integer[],
    f_102 integer[],
    f_120 integer,
    f_129 integer,

etc

and 1 index:

CREATE INDEX baseline_denull_eid_idx
    ON public.baseline_denull USING btree
    (eid)
    TABLESPACE pg_default;

I have a core saved, It says:

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `postgres: user xxx 172.17.0.64(36654) SELECT                      '.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f3c0c08c290 in ?? ()
(gdb) bt
#0  0x00007f3c0c08c290 in ?? ()
#1  0x0000000000000000 in ?? ()
(gdb) quit

How could I enable JIT again without getting a segmentation fault?

Regards,

Pablo