bug#81642: [PATCH] rcirc: Allow UnrealIRCd CAP whitespace quirk

Tags: patch

Hi there,

I've got a minor minor bugfix.

Trying to connect to Slashnet recently, I found rcirc couldn't
get out of registration because of a weird quirk with their
server's CAP messages: Names sometimes have trailing whitespace,
so rcirc doesn't catch that it's been properly ACKd by the server.

Where `cap` parsed out of the server's mesage is
"multi-prefix " and rcirc-requested-capabilities only contains
"multi-prefix", this won't work:
`(delete cap rcirc-requested-capabilities)`

String-trimming `cap` there fixes it.

Cheers,
jadedctrl



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From cd424bb53a87c40f6570ecd4d5cd83eedce5448f Mon Sep 17 00:00:00 2001
From: Jaidyn Ann <[email protected]>
Date: Sun, 16 Aug 2026 21:32:03 -0500
Subject: [PATCH] rcirc: Allow UnrealIRCd CAP whitespace quirk

(rcirc-handler-CAP): Trim received capability
names, since some servers *cough* add trailing whitespace.
---
 lisp/net/rcirc.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/net/rcirc.el b/lisp/net/rcirc.el
index a7cf5c0db37..cd1638c2d1f 100644
--- a/lisp/net/rcirc.el
+++ b/lisp/net/rcirc.el
@@ -3820,7 +3820,7 @@ ARGS should have the form (USER SUBCOMMAND . ARGUMENTS).  PROCESS
 is the process object for the current connection."
   (with-rcirc-process-buffer process
     (let ((subcmd (cadr args)))
-      (dolist (cap (cddr args))
+      (dolist (cap (mapcar 'string-trim (cddr args)))
         (cond ((string= subcmd "ACK")
                (push (intern (downcase cap)) rcirc-acked-capabilities)
                (setq rcirc-requested-capabilities
-- 
2.53.0