--- a/util/dbuffer.lua	Sun Aug 16 20:30:02 2020 +0200
+++ b/util/dbuffer.lua	Thu Aug 20 15:22:19 2020 +0100
@@ -142,7 +142,7 @@
 
 	local front_chunk = self.items:peek();
 
-	if #front_chunk - self.front_consumed >= bytes then
+	if not front_chunk or #front_chunk - self.front_consumed >= bytes then
 		return;
 	end