... and if you try with: 
for my $mode (@probe_modes) {
   local (@source,@destination);
   create_map_file $mode;
   get_elements; # @source and @destination are filled here
   scan_matrix $mode;
   @source =();
   @destination =();
}

In reply to Re: The weirdest problem with undef by dirac
in thread The weirdest problem with undef by insaniac

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