If you need to go hunting for lexicals then you start with PadWalker. If the lexical you are looking for isn't immediately visible then you might also use Devel::Caller to get the code references for other places in the calling stack. You'd then use PadWalker on those references to check for otherwise inaccessible lexicals. Eventually every lexical exists in some scope that itself is visible either from the symbol table or via the calling stack.
Fun Fun Fun in the Fluffy Chair
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