From d0d5aa6425c8e7f5453a7173b74f95351f7db266 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Mon, 2 Feb 2004 22:35:53 +0000
Subject: [PATCH] (yytokenName): Bullet-proof against YYEMPTY token.
 (yyreportSyntaxError): Handle case where lookahead token is YYEMPTY.

---
 data/glr.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/data/glr.c b/data/glr.c
index eb270a17..586da61e 100644
--- a/data/glr.c
+++ b/data/glr.c
@@ -1,7 +1,7 @@
 m4_divert(-1)                                                       -*- C -*-
 
 # GLR skeleton for Bison
-# Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -636,6 +636,9 @@ yyFail (yyGLRStack* yystack]b4_pure_formals[, const char* yyformat, ...)
 static inline const char*
 yytokenName (yySymbol yytoken)
 {
+  if (yytoken == YYEMPTY)
+    return "";
+
   return yytname[yytoken];
 }
 #endif
@@ -1653,7 +1656,8 @@ yyreportSyntaxError (yyGLRStack* yystack,
 	  if (yymsg != 0)
 	    {
 	      char* yyp = yymsg;
-	      sprintf (yyp, "syntax error, unexpected %s",
+	      sprintf (yyp, "syntax error%s%s",
+		       (*yytokenp == YYEMPTY ? "" : ", unexpected "),
 		       yytokenName (*yytokenp));
 	      yyp += strlen (yyp);
 	      if (yycount < 5)
-- 
2.45.2