No expansions performed while declaring an associative array using a list of keys and values

[Oğuz]

I was trying the new features of bash 5.1 and came across this inconsistent
behavior:

    $ foo='1 2'
    $ declare -A bar=($foo 3)
    $ declare -p bar
    declare -A bar=(["\$foo"]="3" )
    $
    $ bar+=($foo 3)
    $ declare -p bar
    declare -A bar=(["\$foo"]="3" ["1 2"]="3" )

Is there a particular reason to avoid performing expansions in `declare -A
bar=($foo 3)'?

Oğuz