No because /\d*/ will always match so you must be significantly more optimistic about the state of your data than a more restrictive /\d+/. requiring at least /something/ is still pretty optimistic...

__SIG__
use B;
printf "You are here %08x\n", unpack "L!", unpack "P4", pack
  "L!", B::svref_2object(sub{})->OUTSIDE;
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