--- a/net/server_epoll.lua	Sat Jul 17 14:54:48 2021 +0200
+++ b/net/server_epoll.lua	Sun Jul 18 08:53:37 2021 +0200
@@ -504,7 +504,7 @@
 				buffer[i] = nil;
 			end
 		else
-			data.writebuffer = data:sub(partial+1);
+			self.writebuffer = data:sub(partial+1);
 		end
 		self:set(nil, true);
 		self:setwritetimeout();