nounset option and arrays

[Poor Yorick]

In the following example, I was expecting var2 not to be seen as an unbound 
variable after it was declared.  Wouldn't it be more consistent with the 
treatment of var1 not to issue the unbound variable error in this case?  What 
is the rationale behind the current behavior?

    bash-3.2$ shopt -s -o nounset
    bash-3.2$ declare var1
    bash-3.2$ echo $var1

    bash-3.2$ declare -a var2
    bash-3.2$ echo $var2
    bash: var2: unbound variable
    bash-3.2$ echo ${var2[@]}
    bash: var2[@]: unbound variable

-- 
Yorick