yep, correct, this I meant.

hence

> > without dependency to a non-core XS module

updated

B::Xref itself is written in Perl, necessary methods are imported from B

> which is an XS module (albeit bundled with the perl distribution).

B is advertised as "Perl's Compiler Backend" and bundled in core.

Hence no dependency risk, using it is far safer as recompiling an XS module.

PadWalker has bugs, a Pure Perl solution could be updated more often.