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Bug #19399

Updated by nobu (Nobuyoshi Nakada) over 1 year ago

`Ripper::Lexer.parse` Ripper::Lexer.paser throws ``undefined method `flatten!' for nil:NilClass (NoMethodError)`` for this input 
 ~~~ruby 
 require 'ripper' 
 code = <<~CODE 
   a do |b # closing "|" is missing 
     <<~C 
     C 
   end 
 CODE 
 Ripper::Lexer.parse code 
 ~~~ 

 ~~~ 
 /Users/tomoya/.rbenv/versions/3.2.0/lib/ruby/3.2.0/ripper/lexer.rb:183:in `parse': undefined method `flatten!' for nil:NilClass (NoMethodError) 

         result.concat(@buf) until (@buf = []; super(); @buf.flatten!; @buf.empty?) 
                                                            ^^^^^^^^^ 
	 from /Users/tomoya/.rbenv/versions/3.2.0/lib/ruby/3.2.0/ripper/core.rb:19:in `parse' 
	 from -:8:in `<main>' 
 ~~~

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