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my $raw   = path( sample.vcd)->slurp_raw;
my $re = qr{
...
    say $i; 
    say $2; 
        }

 
Global symbol "$dumpoff" requires explicit package name at ./vcd2net.p
+l line 8.
Global symbol "$end" requires explicit package name at ./vcd2net.pl li
+ne 8.
...
    declared beforehand using "our", or explicitly qualified to say 
    which package the global variable is in (using "::").