Greetings, Earthlings!
  Playing with NetBSD 0.9 and stumbled upon:
	unset VAR
	...
	echo ${VAR:=`date`}
will core while VAR is undefined whereas:
	VAR=Friday
	...
	echo ${VAR:=`date`}
will not (i.e. chokes when the expression must be evaluated -- `date`, etc.).

Have not had time to look through sources and hopefully some other slob
has caught this before me and /bin/sh has been repaired (has it?)
Thx!

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