From 33d084bcbc844c5ab96d73197b64cfc7f6261c3e Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Sun, 18 Nov 2007 19:53:17 +0100
Subject: [PATCH] An empty token is not a valid number.

---
 judge/token.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/judge/token.c b/judge/token.c
index 3c8ce38..795cc08 100644
--- a/judge/token.c
+++ b/judge/token.c
@@ -101,6 +101,8 @@ char *get_token(struct tokenizer *t)
 #define PARSE(f, ...)						\
 	char *end;						\
 	errno = 0;						\
+	if (!t->toksize)					\
+	  return 0;						\
 	*x = f(t->token, &end, ##__VA_ARGS__);			\
 	return !(errno || (unsigned char *) end != t->token + t->toksize)
 
-- 
2.39.2