1 files changed, 1 insertions, 0 deletions
diff --git a/bftw.c b/bftw.c
index e76ca09..ce3a567 100644
--- a/bftw.c
+++ b/bftw.c
@@ -545,6 +545,7 @@ static struct bftw_dir *bftw_queue_pop(struct bftw_queue *queue) {
 
 /** Destroy a bftw_queue. */
 static void bftw_queue_destroy(struct bftw_queue *queue) {
+	assert(queue->size == 0);
 	free(queue->buffer);
 }