From 0ff4e5cf646b23664eaf6356ed216164001d4386 Mon Sep 17 00:00:00 2001
From: uz <uz@b7a2c559-68d2-44c3-8de9-860c34a00d81>
Date: Sun, 22 Apr 2012 21:57:28 +0000
Subject: [PATCH] The program dumped core when read/write was used without a
 conversion of the input to binary data.

git-svn-id: svn://svn.cc65.org/cc65/trunk@5651 b7a2c559-68d2-44c3-8de9-860c34a00d81
---
 src/sp65/main.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/sp65/main.c b/src/sp65/main.c
index a776bf9fb..3faf1f387 100644
--- a/src/sp65/main.c
+++ b/src/sp65/main.c
@@ -302,6 +302,11 @@ static void OptWrite (const char* Opt attribute ((unused)), const char* Arg)
     /* Parse the argument */
     Collection* A = ParseAttrList (Arg, NameList, 2);
 
+    /* We must have output data */
+    if (D == 0) {
+        Error ("No conversion, so there's nothing to write");
+    }
+
     /* Write the file */
     WriteOutputFile (D, A, C);