Issue #21446 has been updated by nobu (Nobuyoshi Nakada). It does not seem to need to reopen the refinement. Reproduces just by changing visibility twice. ```ruby module R refine B do private :a public :a end end ``` ---------------------------------------- Bug #21446: StackOverflow when changing visibility in reopened refinement https://bugs.ruby-lang.org/issues/21446#change-113791 * Author: luke-gru (Luke Gruber) * Status: Open * ruby -v: 3.5.0 * Backport: 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- ```ruby class A def a :a end end class B < A end module R refine B do private :a end end module R refine B do public :a end end using R B.new.a # StackOverflow ``` I would expect it to change the visibility, not to overflow the stack. -- https://bugs.ruby-lang.org/