https://git.ruby-lang.org/ruby.git/commit/?id=b22bfdaa9a

From b22bfdaa9ad0ae96f79ee75503c85908fa2ec934 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sun, 14 Jun 2020 16:08:33 +0900
Subject: Fixed up rest, keywords, keyword rest and block arguments


diff --git a/tool/mk_builtin_loader.rb b/tool/mk_builtin_loader.rb
index db2224c..f28f48f 100644
--- a/tool/mk_builtin_loader.rb
+++ b/tool/mk_builtin_loader.rb
@@ -53,8 +53,15 @@ def collect_params tree https://github.com/ruby/ruby/blob/trunk/tool/mk_builtin_loader.rb#L53
   while tree
     case tree.first
     when :params
-      idents = (tree[1] || []) + (tree[2] || []).map(&:first)
-      return idents.map { |ident| ident[1].to_sym }
+      params = []
+      _, mand, opt, rest, post, kwds, kwrest, block = tree
+      mand.each {|_, v| params << v.to_sym} if mand
+      opt.each {|(_, v), | params << v.to_sym} if opt
+      params << rest[1][1].to_sym if rest
+      post.each {|_, v| params << v.to_sym} if post
+      params << kwrest[1][1].to_sym if kwrest
+      params << block[1][1].to_sym if block
+      return params
     when :paren
       tree = tree[1]
     else
-- 
cgit v0.10.2


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