Luckily, the OP used the strictures, and it resulted in compile errors. Without them, some code will compile and silently do the wrong thing:

perl -E'@n=7..9;$x=$n[i];say$x'
7
[download]

In this case, i is kinda evaluated as numeric :)

perl -MO=Deparse -E'@n=7..9;$x=$n[i];say$x'
@n = 7..9;
$x = $n[0];
say $x;
-e syntax OK
[download]