From 2f65eda7bdecf408bd562fd7d2d4d6ed22d361c0 Mon Sep 17 00:00:00 2001
From: Danila Fedorin <danila.fedorin@gmail.com>
Date: Sun, 26 Feb 2017 22:35:45 -0800
Subject: [PATCH] Try to fix reading freed memory in eval.c. This occurred when
 the null term was reached - the token was freed, but no error was thrown
 (it's just the end of the string), so the program attempted to increment the
 index using freed token data.

---
 src/eval.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/eval.c b/src/eval.c
index fa61eb3..9e51176 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -209,7 +209,7 @@ liblex_result eval_all(char* string, int index, eval_config* config, ll* matches
           result = ll_append(matches, new_match) == LIBDS_SUCCESS ? LIBLEX_SUCCESS : LIBLEX_MALLOC;
         }
       }
-      if(result == LIBLEX_SUCCESS){
+      if(result == LIBLEX_SUCCESS && string[index] != '\0'){
         index += new_match->to - new_match->from;
       }
     } else {