I see no reason perlcritic couldn't do the same

PPI won't descend into functions or methods and can't descend into XS. You can only get so far with static analysis when trying to find all modifications of a global variable at or below your current call site.

In reply to Re^6: $1 not "freezing" in an addition by chromatic
in thread $1 not "freezing" in an addition by grondilu

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