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use strict;
use warnings;
...
open my $fh, '>', 'data_out.json';
print $fh encode_json($json); #this line is in error
close $fh;

Select or download this

use strict;
use warnings;
...
open my $fh, '>', 'data_out.json';
print $fh encode_json($json); #this line is in error
close $fh;