Issue #21159 has been updated by ufuk (Ufuk Kayserilioglu). Backport changed from 3.1: DONTNEED, 3.2: DONTNEED, 3.3: REQUIRED, 3.4: REQUIRED to 3.1: DONTNEED, 3.2: DONTNEED, 3.3: REQUIRED, 3.4: DONE ruby_3_4 commit:ddb73fbd115631e6dec3bdd230c1cfc13027602e. ---------------------------------------- Bug #21159: `Module#set_temporary_name` should freeze given name https://bugs.ruby-lang.org/issues/21159#change-112181 * Author: ko1 (Koichi Sasada) * Status: Closed * Backport: 3.1: DONTNEED, 3.2: DONTNEED, 3.3: REQUIRED, 3.4: DONE ---------------------------------------- I think it is preferable to freeze the name. So `#set_temporary_name` should copy and freeze the name string. ```ruby c = Class.new.set_temporary_name(str = +'<c>') p c #=> <c> str.upcase! p c #=> actual: <C> #=> expected: <c> p c.name.frozen? #=> actual: false #=> expected: true ``` From the Ractor's aspect, shareable modules should refer only immutable string. -- https://bugs.ruby-lang.org/