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use strict;
use warnings;
...
say *$fh{ IO }-> can( "print" ) ? "yes" : "no";     # no
autoflush $fh 1;
say *$fh{ IO }-> can( "print" ) ? "yes" : "no";     # yes

use strict;
use warnings;
...
__END__

The IO::File class is missing the 'print' method