1 files changed, 10 insertions, 8 deletions

diff --git a/src/vector.c b/src/vector.c
index b12fa942d..aac4863d4 100644
--- a/src/vector.c
+++ b/src/vector.c
@@ -50,22 +50,24 @@ int git_vector_size_hint(git_vector *v, size_t size_hint)
 
 int git_vector_dup(git_vector *v, const git_vector *src, git_vector_cmp cmp)
 {
-	size_t bytes;
-
 	assert(v && src);
 
-	GITERR_CHECK_ALLOC_MULTIPLY(&bytes, src->length, sizeof(void *));
-
-	v->_alloc_size = src->length;
+	v->_alloc_size = 0;
+	v->contents = NULL;
 	v->_cmp = cmp ? cmp : src->_cmp;
 	v->length = src->length;
 	v->flags  = src->flags;
 	if (cmp != src->_cmp)
 		git_vector_set_sorted(v, 0);
-	v->contents = git__malloc(bytes);
-	GITERR_CHECK_ALLOC(v->contents);
 
-	memcpy(v->contents, src->contents, bytes);
+	if (src->length) {
+		size_t bytes;
+		GITERR_CHECK_ALLOC_MULTIPLY(&bytes, src->length, sizeof(void *));
+		v->contents = git__malloc(bytes);
+		GITERR_CHECK_ALLOC(v->contents);
+		v->_alloc_size = src->length;
+		memcpy(v->contents, src->contents, bytes);
+	}
 
 	return 0;
 }