build failure (Bad file descriptor)

[bch <brad.harder%gmail.com@localhost>]

Build failure, related to (?):

Module Name:    src
Committed By:   christos
Date:           Mon Jan  4 03:00:24 UTC 2016

Modified Files:
        src/bin/sh: cd.c eval.c input.c redir.c redir.h

Log Message:
Don't leak redirected rescriptors to exec'ed processes. This is what ksh
does, but bash does not.

==============

#   install  /usr/src/obj/tooldir.NetBSD-7.99.25-amd64/bin/nbmakestrs
mkdir -p /usr/src/obj/tooldir.NetBSD-7.99.25-amd64/bin
/usr/src/obj/tooldir.NetBSD-7.99.25-amd64/bin/x86_64--netbsd-install
-c -p -r -m 555 nbmakestrs
/usr/src/obj/tooldir.NetBSD-7.99.25-amd64/bin/nbmakestrs
install ===> tools/makekeys
--- /usr/src/obj/tooldir.NetBSD-7.99.25-amd64/bin/nbmakekeys ---
#   install  /usr/src/obj/tooldir.NetBSD-7.99.25-amd64/bin/nbmakekeys
mkdir -p /usr/src/obj/tooldir.NetBSD-7.99.25-amd64/bin
/usr/src/obj/tooldir.NetBSD-7.99.25-amd64/bin/x86_64--netbsd-install
-c -p -r -m 555 nbmakekeys
/usr/src/obj/tooldir.NetBSD-7.99.25-amd64/bin/nbmakekeys
install ===> tools/config
params ===> .
--- params ---
#    create  params
sh: 3: Bad file descriptor
*** Failed target:  _params
*** Failed command: printf "%20s = '%-s'\n" BSDOBJDIR /usr/obj >&3
*** [params] Error code 1
nbmake[2]: stopped in /usr/src
1 error
nbmake[2]: stopped in /usr/src
*** [build] Error code 2
nbmake[1]: stopped in /usr/src
1 error
nbmake[1]: stopped in /usr/src
*** [distribution] Error code 2

nbmake: stopped in /usr/src
1 error

nbmake: stopped in /usr/src

ERROR: Failed to make distribution
*** BUILD ABORTED ***