From dae24d75047d31e922880d68cac57a61948b010f Mon Sep 17 00:00:00 2001
From: Cyrill Gorcunov <gorcunov@gmail.com>
Date: Sat, 28 Jun 2014 10:17:39 +0400
Subject: preproc: pp_cleanup -- Don't forget to zeroify variables

Once we free allocated memory don't forget to setup variables
to NULL, otherwise they are pointing into nonexisting memory,
which might lead into sigsegv in best case.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
---
 preproc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/preproc.c b/preproc.c
index 9b114c2e..12b39782 100644
--- a/preproc.c
+++ b/preproc.c
@@ -1184,6 +1184,7 @@ static void delete_Blocks(void)
         if (a != &blocks)
             nasm_free(a);
     }
+    memset(&blocks, 0, sizeof(blocks));
 }
 
 /*
@@ -5141,7 +5142,9 @@ static void pp_cleanup(int pass)
     if (pass == 0) {
         IncPath *i;
         free_llist(predef);
+        predef = NULL;
         delete_Blocks();
+        freeTokens = NULL;
         while ((i = ipath)) {
             ipath = i->next;
             if (i->path)
-- 
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