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  1. do
  2. i = 5
  3. puts 'hey'
  4. end
  5.  
  6. # i undefined here
  7. #puts i
  8.  
Runtime error #stdin #stdout #stderr 0s 5936KB
stdin
Standard input is empty
stdout
Standard output is empty
stderr
prog.rb:1: syntax error, unexpected keyword_do_block
prog.rb:4: syntax error, unexpected keyword_end, expecting end-of-input