buildworld: "cp: /dev/null: Invalid argument"

Is anyone else seeing failures like this in building world and, in my
case, cron jobs as well?


Building /usr/obj/usr/src/amd64.amd64/stand/i386/zfsboot/zfsboot.ldr
--- all_subdir_sbin ---
Building /usr/obj/usr/src/amd64.amd64/sbin/bsdlabel/bsdlabel
--- all_subdir_stand ---
--- zfsboot.ldr ---
cp: /dev/null: Invalid argument
*** [zfsboot.ldr] Error code 1
make[5]: *** zfsboot.ldr removed
--- all_subdir_kerberos5 ---
Building /usr/obj/usr/src/amd64.amd64/kerberos5/usr.sbin/iprop-log/iprop-log
--- all_subdir_stand ---

make[5]: stopped in /usr/src/stand/i386/zfsboot
.ERROR_TARGET='zfsboot.ldr'
.ERROR_META_FILE='/usr/obj/usr/src/amd64.amd64/stand/i386/zfsboot/zfsboot.ldr.meta'
.MAKE.LEVEL='5'
MAKEFILE=''
.MAKE.MODE='meta missing-filemon=yes missing-meta=yes silent=yes verbose'
_ERROR_CMD='cp /dev/null zfsboot.ldr;'
.CURDIR='/usr/src/stand/i386/zfsboot'
.MAKE='make'
.OBJDIR='/usr/obj/usr/src/amd64.amd64/stand/i386/zfsboot'
.TARGETS='all'
DESTDIR='/usr/obj/usr/src/amd64.amd64/tmp'
LD_LIBRARY_PATH=''
MACHINE='amd64'
MACHINE_ARCH='amd64'
MAKEOBJDIRPREFIX=''
MAKESYSPATH='/usr/src/share/mk'
MAKE_VERSION='20200902'