PG 14.1 psql: symbol lookup error: psql: undefined symbol: PQmblenBounded

New installation of PG-14.1 from tarball on RH 8.3 built with gcc-11
using CFLAGS='-O2 -march=native -pipe' (didn't seem particularly
exotic). Sample session is shown below, error appears to happen
more-or-less randomly: using "\l+" or "\db+" has caused it a few
times. Restarting the psql session and re-issuing the same commands
does not cause a repeatable error.

No errors show up in the logs -- it just repeats the

# cat postgresql-14*
2021-11-22 10:24:10.108 EST [3216099] LOG:  starting PostgreSQL 14.1 on x86_64-pc-linux-gnu, compiled by gcc (GCC)
10.2.120201112 (Red Hat 10.2.1-8), 64-bit 
2021-11-22 10:24:10.108 EST [3216099] LOG:  listening on IPv4 address "127.0.0.1", port 5433
2021-11-22 10:24:10.109 EST [3216099] LOG:  listening on Unix socket "/tmp/.s.PGSQL.5433"
2021-11-22 10:24:10.113 EST [3216101] LOG:  database system was shut down at 2021-11-22 10:24:03 EST
2021-11-22 10:24:10.117 EST [3216099] LOG:  database system is ready to accept connections

$ cat /etc/*release
NAME="Red Hat Enterprise Linux"
VERSION="8.3 (Ootpa)"
ID="rhel"
ID_LIKE="fedora"
VERSION_ID="8.3"
PLATFORM_ID="platform:el8"
PRETTY_NAME="Red Hat Enterprise Linux 8.3 (Ootpa)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:redhat:enterprise_linux:8.3:GA"
HOME_URL="https://www.redhat.com/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"

REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 8"
REDHAT_BUGZILLA_PRODUCT_VERSION=8.3
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="8.3"
Red Hat Enterprise Linux release 8.3 (Ootpa)
Red Hat Enterprise Linux release 8.3 (Ootpa)

$ PGDATABASE=postgres PGUSER=postgres PGPORT=5433 PGHOST=localhost psql -a
\i 00-dbname.psql
\echo

\echo Current database: :"DBNAME"
Current database: "postgres"
\set etl_role :DBNAME '_etl'
\set qry_role :DBNAME '_qry'
\echo

\echo Loading database: :"DBNAME" as :"etl_role";
Loading database: "postgres" as "postgres_etl";
\set search_path log_data, loader_detail, calendar, audit, public
set role :etl_role;
psql:00-dbname.psql:13: ERROR:  role "postgres_etl" does not exist
set search_path to :search_path;
SET
psql (14.1)
Type "help" for help.

(cmd)postgres=# \set VERBOSITY verbose
(ins)postgres=# \set ECHO all
(ins)postgres=# \h create database
Command:     CREATE DATABASE
Description: create a new database
Syntax:
CREATE DATABASE name
    [ [ WITH ] [ OWNER [=] user_name ]
           [ TEMPLATE [=] template ]
           [ ENCODING [=] encoding ]
           [ LOCALE [=] locale ]
           [ LC_COLLATE [=] lc_collate ]
           [ LC_CTYPE [=] lc_ctype ]
           [ TABLESPACE [=] tablespace_name ]
           [ ALLOW_CONNECTIONS [=] allowconn ]
           [ CONNECTION LIMIT [=] connlimit ]
           [ IS_TEMPLATE [=] istemplate ] ]

URL: https://www.postgresql.org/docs/14/sql-createdatabase.html

(ins)postgres=# \connect cmod_log cmod_log
psql: symbol lookup error: psql: undefined symbol: PQmblenBounded

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