Issue #20401 has been updated by kddnewton (Kevin Newton). I've updated the message to say: ``` 'when' clause on line 4 duplicates 'when' clause on line 2 and is ignored ``` I hope this is okay, I believe it is much more clear. The PR is here: https://github.com/ruby/ruby/pull/10776. @nobu or @mame could you review? ---------------------------------------- Bug #20401: Duplicated when clause warning line number https://bugs.ruby-lang.org/issues/20401#change-108302 * Author: kddnewton (Kevin Newton) * Status: Open * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- When you have a duplicated when clause, you get a warning for it. For example: ```ruby case foo when :bar when :baz when :bar end ``` you get ``warning: duplicated `when' clause with line 2 is ignored``. But the when clause that is ignored is the one on line 4, not line 2. It seems like it's warning for the wrong line. -- https://bugs.ruby-lang.org/