Array index out of bounds
fish: show "$foo[2]"
                 ^
Array index out of bounds
fish: show $foo[2]
                ^
Array index out of bounds
fish: show "$foo[1 2]"
                   ^
Array index out of bounds
fish: show $foo[1 2]
                  ^
Array index out of bounds
fish: show "$foo[2 1]"
                 ^
Array index out of bounds
fish: show $foo[2 1]
                ^
Invalid index value
fish: echo "$foo[d]"
                 ^
Invalid index value
fish: echo $foo[d]
                ^
Array index out of bounds
fish: echo ()[1]
              ^
Invalid index value
fish: echo ()[d]
              ^
$) is not a valid variable in fish.
fish: echo $$paren
            ^