This patch comes from in-house and has been submitted upstream:

--- groff-1.22.2/src/roff/nroff/nroff.sh.org 2015-02-07 19:56:25.275467577 +0900

+++ groff-1.22.2/src/roff/nroff/nroff.sh 2015-02-07 20:11:22.308246071 +0900

@@ -39,7 +39,7 @@

IBM-1047)

Tloc=cp1047 ;;

*)

- case "${LC_ALL-${LC_CTYPE-${LANG}}}" in

+ case "${LC_ALL:-${LC_CTYPE:-${LANG}}}" in

*.UTF-8)

Tloc=utf8 ;;

iso_8859_1 | *.ISO-8859-1 | *.ISO8859-1 | \

@@ -65,6 +65,7 @@

Topt=

opts=

+disable_error=

for i

do

case $1 in

@@ -72,6 +73,9 @@

opts="$opts -P-c" ;;

-h)

opts="$opts -P-h" ;;

+ -E)

+ opts="$opts -E"

+ disable_error="2> /dev/null" ;;

-[eq] | -s*)

# ignore these options

;;

@@ -133,6 +137,6 @@

# Load nroff-style character definitions too.

-PATH="$GROFF_RUNTIME$PATH" groff -mtty-char $T $opts ${1+"$@"}

+PATH="$GROFF_RUNTIME$PATH" eval groff -mtty-char $T $opts ${1+"$@"} $disable_error

# eof