Orion

diff --git a/task/schedule.c b/task/schedule.c
index 1c00576..527b9ec 100644
--- a/task/schedule.c
+++ b/task/schedule.c
@@ -103,6 +103,8 @@ Task *
 pop_from_queue(TaskQueue *queue)
 {
 	Task *head = queue->start;
+	if (!head)
+		return NULL;
 	queue->start = head->next;
 	if (!queue->start)
 		queue->end = NULL;