The diamond operator reads from ARGV, not STDIN. 
open my $INPUT, '<', \"my input\n";
*ARGV = $INPUT;
print <>;

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

In reply to Re: Override "null filehandle" by choroba
in thread Override "null filehandle" by BillKSmith

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