Issue #20094 has been updated by Eregon (Benoit Daloze). Indeed: ``` $ ruby -ve '(p 1) while false' ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-linux] $ ruby -ve '(p 1) while false' ruby 3.3.1 (2024-04-23 revision c56cd86388) [x86_64-linux] 1 ``` ---------------------------------------- Bug #20094: Inline while loop behavior changed unexpectedly in 3.3.0 https://bugs.ruby-lang.org/issues/20094#change-108165 * Author: sisyphus_cg (Sisyphus CG) * Status: Closed * ruby -v: 3.3.0 * Backport: 3.0: UNKNOWN, 3.1: DONTNEED, 3.2: DONTNEED, 3.3: DONE ---------------------------------------- The behavior of the inline while loop has changed in 3.3.0. This unexpectedly broke my code and I couldn't find anything in the changelog about it so reporting it as a bug. In ruby <= 3.2: ``` ruby (p 1) while false # nothing (p 1; p 2) while false # nothing ``` In ruby 3.3: ``` ruby (p 1) while false # 1 (p 1; p 2) while false # 1 2 ``` Essentially, if the left hand side looks like a statement, now it is treated as a do-while loop. In ruby 3.2 and less this only happened with explicit use of `begin` and `end`. -- https://bugs.ruby-lang.org/