# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1638292780 -3600
# Node ID 520ce76440adab911551a87d4680b25ccb776eb2
# Parent  0b350909da243e7f57f18e2606ab0046b6bc1c9e
net.server_epoll: Prevent loop attempting to send last data after close

If the connection is closed by the peer, any buffered data is given a
last chance to be sent (see f27b9319e0da). If the connection is Really
closed, no attempt to write will occur, instead epoll will raise the
error flag and :onreadable() will be invoked again, where it will try to
:close() again for the same reason, thus looping until the connection
somehow gets destroyed.

By clearing the _connected flag, the second time it passes :onreadable()
it should go directly to :destroy(), breaking the loop.

Thanks Link Mauve for reporting

diff -r 0b350909da24 -r 520ce76440ad net/server_epoll.lua
--- a/net/server_epoll.lua	Tue Nov 30 16:26:01 2021 +0100
+++ b/net/server_epoll.lua	Tue Nov 30 18:19:40 2021 +0100
@@ -577,6 +577,7 @@
 -- Close, possibly after writing is done
 function interface:close()
 	if self._connected and self.writebuffer and (self.writebuffer[1] or type(self.writebuffer) == "string") then
+		self._connected = false;
 		self:set(false, true); -- Flush final buffer contents
 		self:setreadtimeout(false);
 		self:setwritetimeout();