Issue #20186 has been updated by rdimartino (Robert DiMartino). Another case of this causing a problem https://github.com/davidwessman/syntax_tree-erb/issues/81 Relevant commits, I believe: https://github.com/ruby/ruby/commit/e1250a5f9778f463a541bc1ee5a951f64c131bbf https://github.com/ruby/ruby/commit/29e5fca7181de5f0db372374d5f39704f81f2731 https://github.com/ruby/ruby/commit/b5e23d3e3b5ff2f5328aa43a2392ebe7c951a222 ---------------------------------------- Bug #20186: Ripper does not generate AST for some keywords in Ruby 3.3 https://bugs.ruby-lang.org/issues/20186#change-108102 * Author: kzkn (Kazuki Nishikawa) * Status: Open * ruby -v: 3.3.0 * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- Ripper does not generate AST for the below keyword: - break - next - redo - retry - yield Ruby 3.2 ``` $ ruby -v ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-linux] $ ruby -rripper -e "p Ripper.sexp('break')" [:program, [[:break, []]]] $ ruby -rripper -e "p Ripper.sexp('next')" [:program, [[:next, []]]] $ ruby -rripper -e "p Ripper.sexp('redo')" [:program, [[:redo]]] $ ruby -rripper -e "p Ripper.sexp('retry')" [:program, [[:retry]]] $ ruby -rripper -e "p Ripper.sexp('yield')" [:program, [[:yield0]]] ``` Ruby 3.3 ``` $ ruby -v ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [x86_64-linux] $ ruby -rripper -e "p Ripper.sexp('break')" nil $ ruby -rripper -e "p Ripper.sexp('next')" nil $ ruby -rripper -e "p Ripper.sexp('redo')" nil $ ruby -rripper -e "p Ripper.sexp('retry')" nil $ ruby -rripper -e "p Ripper.sexp('yield')" nil ``` EDIT) Here is a case of real-world problem: https://github.com/ruby-formatter/rufo/issues/319 -- https://bugs.ruby-lang.org/