Issue #21043 has been updated by k0kubun (Takashi Kokubun). Backporting commit:d492cfdaadf9e936217e80e0899809313ff4b3d5 to `ruby_3_4` causes a conflict. ---------------------------------------- Bug #21043: Prism defined? has slight deviations from parse.y https://bugs.ruby-lang.org/issues/21043#change-111939 * Author: kddnewton (Kevin Newton) * Status: Closed * Assignee: prism * Backport: 3.1: DONTNEED, 3.2: DONTNEED, 3.3: DONTNEED, 3.4: REQUIRED ---------------------------------------- ```ruby defined?((alias foo bar)) defined?((undef foo)) def foo(*) = defined?(foo(*)) def foo(**) = defined?(foo(**)) def foo(...) = defined?(foo(...)) def foo(&) = defined?(foo(&)) ``` and a couple others have slightly different behavior. -- https://bugs.ruby-lang.org/