From a31b3426096f1545757386ce5191342c9c565fe5 Mon Sep 17 00:00:00 2001
From: "Todd C. Miller" <Todd.Miller@courtesan.com>
Date: Sat, 28 Nov 1998 00:37:51 +0000
Subject: [PATCH] never say "error on line -1"

---
 parse.yacc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/parse.yacc b/parse.yacc
index 12d0cb92a..7a7cfd8e5 100644
--- a/parse.yacc
+++ b/parse.yacc
@@ -147,10 +147,10 @@ void yyerror(s)
 {
     /* save the line the first error occured on */
     if (errorlineno == -1)
-	errorlineno = sudolineno - 1;
+	errorlineno = sudolineno ? sudolineno - 1 : 0;
 #ifndef TRACELEXER
     (void) fprintf(stderr, ">>> sudoers file: %s, line %d <<<\n", s,
-	sudolineno - 1);
+	sudolineno ? sudolineno - 1 : 0);
 #else
     (void) fprintf(stderr, "<*> ");
 #endif
-- 
2.40.0