lib/asciidoctor/cli/invoker.rb in asciidoctor-2.0.4 vs lib/asciidoctor/cli/invoker.rb in asciidoctor-2.0.5

@@ -84,21 +84,23 @@
             outfile ||= '-'
           end
         end
 
         if outfile == '-'
-          tofile = @out || $stdout
+          # NOTE set_encoding returns nil on JRuby 9.1
+          (tofile = @out) || ((tofile = $stdout).set_encoding UTF_8)
         elsif outfile
           opts[:mkdirs] = true
           tofile = outfile
         else
           opts[:mkdirs] = true
           # automatically calculate outfile based on infile
         end
 
         if stdin
           # allows use of block to supply stdin, particularly useful for tests
-          input = block_given? ? yield : STDIN
+          # NOTE set_encoding returns nil on JRuby 9.1
+          block_given? ? (input = yield) : ((input = $stdin).set_encoding UTF_8, UTF_8)
           input_opts = opts.merge to_file: tofile
           if show_timings
             @documents << (::Asciidoctor.convert input, (input_opts.merge timings: (timings = Timings.new)))
             timings.print_report err, '-'
           else