Issue #20649 has been updated by nobu (Nobuyoshi Nakada). https://github.com/ruby/ruby/pull/11235 ---------------------------------------- Bug #20649: Ripper fails to tokenize `def f; (x)::A =` https://bugs.ruby-lang.org/issues/20649#change-109213 * Author: tompng (tomoya ishida) * Status: Open * ruby -v: ruby 3.4.0dev (2024-07-24T05:44:32Z master e642ddf7ae) [x86_64-linux] * Backport: 3.1: REQUIRED, 3.2: REQUIRED, 3.3: REQUIRED ---------------------------------------- Ripper fails to tokenize some dynamic constant assignment syntax error code. `''::A=` `(x)::A=` `(x).y::Z=` `[]::A=` `{}::A=` ``` ``::A=``` `//::A=` `%()::A=` in method body seems to fail. Same for `for ''::A in` and `rescue => ''::A;` in method body. ~~~ruby Ripper.tokenize 'def f; (x)::A =' #=> /opt/ruby/lib/ruby/3.4.0+0/ripper/lexer.rb:245:in 'Ripper::Lexer#on_error2': undefined method 'pos' for nil (NoMethodError) @errors.push Elem.new(elem.pos, __callee__, elem.tok, elem.state, mesg) ^^^^ from /opt/ruby/lib/ruby/3.4.0+0/ripper/lexer.rb:176:in 'Ripper#parse' from /opt/ruby/lib/ruby/3.4.0+0/ripper/lexer.rb:176:in 'Ripper::Lexer#parse' from /opt/ruby/lib/ruby/3.4.0+0/ripper/lexer.rb:150:in 'Ripper::Lexer#tokenize' from /opt/ruby/lib/ruby/3.4.0+0/ripper/lexer.rb:26:in 'Ripper.tokenize' from -e:1:in '<main>' ~~~ -- https://bugs.ruby-lang.org/