From fed3a7c68a0247b1e19a94a47776797c26b669b2 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Thu, 29 Jul 2021 11:58:44 +0900
Subject: parse.y: revert some changes to be compiled by old `bison`.

---
 mrbgems/mruby-compiler/core/parse.y | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mrbgems/mruby-compiler/core/parse.y b/mrbgems/mruby-compiler/core/parse.y
index 6913eb1b9..23bff17b2 100644
--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -1383,10 +1383,10 @@ heredoc_end(parser_state *p)
 
 /* xxx ----------------------------- */
 
+#define YYERROR_VERBOSE 1
 %}
 
-%define parse.error verbose
-%define api.pure
+%pure-parser
 %parse-param {parser_state *p}
 %lex-param {parser_state *p}
 
-- 
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