my $gz = 'f';
my $data;
 eval { $data = gunzip( $gz );};
 if ($@) { say "Something wrong"; exit; };
say "done";
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Produce Attempt to uncompress empty string at ./aa.pl line 11. done which mean - generate fatal error but not recognize it YES, i will check that the file is not empty before using gzip - it will be easier for now