zsh style associative array assignment bug

[Eric Cook]

Hey,

When doing an assignment with an uneven number of elements bash currently 
silently treat the last element
as a key and assigns it an empty string.

$ typeset -A ary=(this feature came from zsh); typeset -p ary
declare -A ary=([came]="from" [this]="feature" [zsh]="" )

In zsh this is an error,
% typeset -A ary=(this feature came from zsh); typeset -p ary
zsh: bad set of key/value pairs for associative array

Could bash be adjusted to align with zsh in this case?