From e22e9e2f868ccec73fbf23bf60f1dcfa8ca7ff20 Mon Sep 17 00:00:00 2001
From: parkrrrr <parkrrrr>
Date: Thu, 1 Dec 2005 20:01:16 +0000
Subject: [PATCH] prevent a potential but currently impossible segfault that
 could happen when an fs-copy function just does a memcpy

---
 formspec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/formspec.c b/formspec.c
index 1c20c53c9..ce1dbf90b 100644
--- a/formspec.c
+++ b/formspec.c
@@ -31,6 +31,8 @@ format_specific_data *fs_chain_copy( format_specific_data *source ) {
 	format_specific_data **copy = &result;
 	while ( source ) {
 		source->copy( (void **)copy, (void *)source );
+		/* prevent segfaults from badly-behaved copy functions */
+		(*copy)->next = NULL; 
 		copy = &((*copy)->next);
 		source = source->next;
 	} 
-- 
2.30.2