It wouldn't as the variables have a different scope: 
perl -we 'my $x; while($x) { my $x }'

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map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re^3: while loop not working by choroba
in thread while loop not working by catfish1116

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