--- client.c.orig	2023-01-25 11:32:10.764951000 +0100
+++ client.c	2023-01-25 11:34:10.167171000 +0100
@@ -143,6 +143,9 @@
 	maybeSync(client);
 }
 
+static void ignoreClientSpecViolations(struct Client *client, struct Message *msg) {
+}
+
 static void handleUser(struct Client *client, struct Message *msg) {
 	if (!msg->params[0]) {
 		client->error = true;
@@ -355,6 +358,7 @@
 	{ false, false, "NICK", handleNick },
 	{ false, false, "PASS", handlePass },
 	{ false, false, "USER", handleUser },
+	{ false, false, "JOIN", ignoreClientSpecViolations },{ false, false, ""/*CoreIRC weirdness*/, ignoreClientSpecViolations },
 	{ true, false, "CAP", handleCap },
 	{ true, false, "PALAVER", handlePalaver },
 	{ true, false, "PONG", handlePong },