From 67583876684ec56b99d71b7480d6bcfa4d1f4c14 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christophe=20Sta=C3=AFesse?= <chastai@skynet.be>
Date: Sun, 5 Oct 2014 16:36:57 +0200
Subject: [PATCH] Add assertion to symFindMacroArg() to debug oob array access

---
 src/asm/symbol.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/asm/symbol.c b/src/asm/symbol.c
index 64b8ad1b..18f942af 100644
--- a/src/asm/symbol.c
+++ b/src/asm/symbol.c
@@ -5,6 +5,7 @@
  *
  */
 
+#include <assert.h>
 #include <stdio.h>
 #include <string.h>
 #include <time.h>
@@ -431,6 +432,8 @@ sym_FindMacroArg(SLONG i)
 	if (i == -1)
 		i = MAXMACROARGS + 1;
 
+	assert(i-1 >= 0 &&
+	    i-1 < sizeof(currentmacroargs)/sizeof(*currentmacroargs));
 	return (currentmacroargs[i - 1]);
 }