D:\Development>copy con deparse.pl
use strict;
my $x=$_ foreach 1..10;
print $x;
^Z
        1 file(s) copied.

D:\Development>copy con deparse.out.pl
use strict;
^Z
        1 file(s) copied.

D:\Development>perl -MO=Deparse deparse.pl >>deparse.out.pl
deparse.pl syntax OK

D:\Development>perl deparse.pl

D:\Development>perl deparse.out.pl
Global symbol "$x" requires explicit package name at deparse.out.pl line 5.
Execution of deparse.out.pl aborted due to compilation errors.

D:\Development>