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  1. or download this
    use strict;
use warnings;
...
{
    $newvar = $undefvar;
}
  2. or download this
    Global symbol "$undefvar" requires explicit package name at C:\Users\l
+iorlew\Desktop\perl\fixes\scripts\test.pl line 5.
Global symbol "$undefvar" requires explicit package name at C:\Users\l
+iorlew\Desktop\perl\fixes\scripts\test.pl line 7.