Perlbrew install of 5.30.2 fails

Question

I'm attempting to install perl 5.30.2 with perlbrew thus: perlbrew install perl-5.30.2

however, this install fails

grep -A2 -B2 -i fail /home/con/perl5/perlbrew/build.perl-5.30.2.log

shows

op/groups.t                                                      (Wstat: 0 Tests: 3 Failed: 1)
  Failed test:  1

And the output of that test (from /home/con/perl5/perlbrew/build.perl-5.30.2.log) is

# Failed test 1 - perl's `$(' agrees with `id -a 2>/dev/null || id 2>/dev/null' at op/groups.t line 117
op/groups.t ........................................................ 
Failed 1/3 subtests 
    (less 1 skipped subtest: 1 okay)

System information (from /etc/os-release)

NAME="Red Hat Enterprise Linux Server"
VERSION="7.6 (Maipo)"
ID="rhel"
ID_LIKE="fedora"
VARIANT="Server"
VARIANT_ID="server"
VERSION_ID="7.6"
PRETTY_NAME="Red Hat Enterprise Linux"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:redhat:enterprise_linux:7.6:GA:server"
HOME_URL="https://www.redhat.com/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"

REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7"
REDHAT_BUGZILLA_PRODUCT_VERSION=7.6
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="7.6"

I have no idea how to debug this. I'm already running the latest perlbrew version:

$ perlbrew --version
/usr/local/bin/perlbrew  - App::perlbrew/0.88

and I've already installed patchperl.

I don't see any useful solutions on other links Why does perlbrew fail while installing perl-5.12.2?

How can I debug this to install perl-5.30.2?