Deparse is wrong in this case, on two counts: 1) print($t) is not strict safe in the deparsed version, but it is in the original, and 2) print($t) prints the package variable in the deparsed version, but not in the original.

To answer the OP, my is considered a function for syntax purposes, so my ... foreach ...; means (my ...) foreach ...;, which makes no sense.