Bug#750496: texlive-xetex crashes install

script as it is now (original except -x added to set line)

Eric_Admin@INSPIRON1545 ~
$ ssh 192.168.1.5 -l root
Debian GNU/Linux 7

BeagleBoard.org BeagleBone Debian Image 2014-05-14

Support/FAQ: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian
Last login: Wed Jun 4 05:53:36 2014 from 192.168.1.7
root@beaglebone:~# df -h
Filesystem      Size Used Avail Use% Mounted on
rootfs           30G 9.6G   19G 35% /
udev             10M     0   10M   0% /dev
tmpfs            49M 832K   48M   2% /run
/dev/mmcblk0p2   30G 9.6G   19G 35% /
tmpfs           122M     0 122M   0% /dev/shm
tmpfs           122M     0 122M   0% /sys/fs/cgroup
tmpfs           5.0M     0 5.0M   0% /run/lock
tmpfs           100M     0 100M   0% /run/user
/dev/mmcblk0p1   96M   78M   19M 82% /boot/uboot
root@beaglebone:~# cd /var/lib/dpkg/info/
root@beaglebone:/var/lib/dpkg/info# nano texlive-
Display all 112 possibilities? (y or n)
root@beaglebone:/var/lib/dpkg/info# nano texlive-xetex.post
texlive-xetex.postinst texlive-xetex.postrm
root@beaglebone:/var/lib/dpkg/info# nano texlive-xetex.postinst
root@beaglebone:/var/lib/dpkg/info# cat texlive-xetex.postinst
#!/bin/sh

set -e -x
# Automatically added by dh_installtex
##
## postinst-tex
##
## postinst snippets for everything TeX related (mktlsr, hyphenation
## patterns, formats, font maps)
##
## Authors:
##       Florent Rougon <f.rougon@free.fr>
##       Norbert Preining <preining@logic.at>
##
#

TEXMFTREES="/usr/share/texmf /var/lib/texmf"
FULLTEXMFTREES="$TEXMFTREES /usr/share/texlive/texmf /usr/share/texlive/texmf-dist"

#
#
dhit_libkpathsea_configured ()
{
    kpsewhich --version >/dev/null 2>&1
}

dhit_update_lsr_files ()
{
    tempfile=$(mktemp -p /tmp mktexlsr.XXXXXXXX)
    printf "Running mktexlsr. This may take some time... "
    if mktexlsr $* > $tempfile 2>&1 ; then
        rm -f $tempfile
        echo "done."
    else
        exec >&2
        echo
        echo "mktexlsr $* failed. Output has been stored in"
        echo "$tempfile"
        echo "Please include this file if you report a bug."
        echo
        exit 1
    fi
}

dhit_build_hyphen_format_if_format_exists ()
{
    v=$(kpsewhich -var-value TEXMFSYSVAR)
    c=$(kpsewhich -var-value TEXMFSYSCONFIG)
    TEXMFVAR="$v"
    TEXMFCONFIG="$c"
    export TEXMFVAR TEXMFCONFIG
    fmtcnffile=$(kpsewhich --format='web2c files' fmtutil.cnf)
    X=$(grep "^[[:space:]]*$1[[:space:]]" $fmtcnffile || true)
    if [ -n "$X" ] ; then
        dhit_build_format --byhyphen "$2"
    fi
}

dhit_build_format ()
{

    tempfile=$(mktemp -p /tmp fmtutil.XXXXXXXX)
    printf "Building format(s) $*.\n\tThis may take some time... "
    if fmtutil-sys "$@" > $tempfile 2>&1 ; then
        rm -f $tempfile
        echo "done."
    else
        exec >&2
        echo
        echo "fmtutil-sys failed. Output has been stored in"
        echo "$tempfile"
        echo "Please include this file if you report a bug."
        echo
        exit 1
    fi
}

case "$1" in
    configure|abort-upgrade|abort-remove|abort-deconfigure)
        update-updmap --quiet
        update-language
        update-fmtutil
        if dhit_libkpathsea_configured; then
            #
            do_lsr=0
            for i in format lsrfull ; do
                if [ "$i" = lsrfull ] ; then
                    TEXMFTREES=$FULLTEXMFTREES
                fi
                if [ "$i" = allformats ] ; then
                    do_lsr=1
                fi
                if [ "$i" = format ] ; then
                    do_lsr=1
                fi
            done
            if [ $do_lsr = 1 ] ; then
                if which mktexlsr >/dev/null; then
                    dhit_update_lsr_files $TEXMFTREES
                fi
            fi
            for i in format lsrfull ; do
                if [ "$i" = lsr ] ; then
                    if [ $do_lsr = 0 ] ; then
                        update-texmf-config lsr
                    fi
                fi
                if [ "$i" = lsrfull ] ; then
                    if [ $do_lsr = 0 ] ; then
                        update-texmf-config lsrfull
                    fi
                fi
                if [ "$i" = map ] ; then
                    update-texmf-config map
                fi
                if [ "$i" = allformats ] ; then
                    dhit_build_format --all
                fi
                if [ "$i" = format ] ; then
                    for fmt in 10texlive-xetex ; do
                        if [ -r "/etc/texmf/fmt.d/$fmt.cnf" ] ; then
                            dhit_build_format --all --cnffile "/etc/texmf/fmt.d/$fmt.cnf"
                        else
                            echo "config file /etc/texmf/fmt.d/$fmt.cnf not available"
                        fi
                    done
                fi
                if [ "$i" = hyphen ] ; then
                    update-texmf-config hyphen
                fi
            done
        fi
    ;;

esac

# End automatically added section
root@beaglebone:/var/lib/dpkg/info# dpkg --configure -a
root@beaglebone:/var/lib/dpkg/info#

(as you can see no output. not lots like expected!)