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-rw-r--r--source4/lib/talloc/talloc.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/source4/lib/talloc/talloc.c b/source4/lib/talloc/talloc.c
index 72765448c7..31796a247b 100644
--- a/source4/lib/talloc/talloc.c
+++ b/source4/lib/talloc/talloc.c
@@ -36,6 +36,8 @@
#include <stdarg.h>
#include <stdint.h>
#include "talloc.h"
+/* assume a modern system */
+#define HAVE_VA_COPY
#endif
/* use this to force every realloc to change the pointer, to stress test
@@ -946,10 +948,16 @@ static char *talloc_vasprintf_append(char *s, const char *fmt, va_list ap) PRINT
static char *talloc_vasprintf_append(char *s, const char *fmt, va_list ap)
{
- struct talloc_chunk *tc = talloc_chunk_from_ptr(s);
+ struct talloc_chunk *tc;
int len, s_len;
va_list ap2;
+ if (s == NULL) {
+ return talloc_vasprintf(NULL, fmt, ap);
+ }
+
+ tc = talloc_chunk_from_ptr(s);
+
VA_COPY(ap2, ap);
s_len = tc->size - 1;