makeinfo (texinfo 6.5) hangs on perl 5.28, building emacs 26.1

[jpbion]

Sent this yesterday - still not in mailing list archive 12 hours later, 
with the archive saying it updates every 30 minutes, so I will assume 
the message was lost... apologies if this is a duplicate.

As the subject states, 'makeinfo' hangs on making elisp.info with Perl 
5.28,Texinfo 6.5. It never completes its task, no matter how long you 
wait. I apologize for not having more info, but I am unskilled in Perl, 
and do not know how to debug it.

Texinfo: 6.5
Perl: 5.28
Emacs: 26.1

The hanging command is:

/usr/bin/makeinfo  --force --verbose
  --enable-encoding -I ./../emacs -I . --no-split -o 
../../info/elisp.info
  elisp.texi

This was invoked by issuing:

tar xf sourcearchive/emacs-26.1.tar.xz
cd emacs-26.1
./autogen.sh
./configure --prefix=/usr --libexecdir=/usr/lib --localstatedir=/var 
--with-x-t\
oolkit=no --without-x --without-gif
make bootstrap

Texinfo 6.5 was compiled by using:

./configure --prefix=/usr
make
make install

Perl 5.28 was compiled by using:

export BUILD_ZLIB=False
export BUILD_BZIP2=0
sh Configure -des -Dprefix=/usr \
                  -Dvendorprefix=/usr           \
                  -Dman1dir=/usr/share/man/man1 \
                  -Dman3dir=/usr/share/man/man3 \
                  -Dpager="/usr/bin/less -isR" \
                  -Duseshrplib \
                  -Dusethreads
make -j4 &&
make install
unset BUILD_ZLIB BUILD_BZIP2