I'm wondering why g1 and g2 don't give the same results: 
sub g1 { getpwnam(@_) }
sub g2 { getpwnam($_[0]) }

print "g1: ", g1("root"), "\n";
print "g2: ", g2("root"), "\n";

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Output: 
g1: 
g2: rootx00root/root/bin/bash

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In reply to getpwnam(@_) ??? by perl5ever

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