https://bugs.gentoo.org/912720
https://gitlab.gnome.org/GNOME/evolution-data-server/-/issues/484
https://gitlab.gnome.org/GNOME/evolution/-/issues/2485
https://gitlab.gnome.org/GNOME/evolution-data-server/-/merge_requests/126

From 087226d29de3ef9070fb7436ca3dcc476cd9a9a5 Mon Sep 17 00:00:00 2001
From: Enrik Berkhan <enrik.berkhan@inka.de>
Date: Thu, 6 Jul 2023 15:44:53 +0000
Subject: [PATCH] Camel MIME utils: fix aliasing issue in datetok

Due to an aliasing issue, datetok() always returned NULL.

With this change, the C aliasing rules will be respected. Further, next is no longer required to be the first element in struct _date_token.
--- a/src/camel/camel-mime-utils.c
+++ b/src/camel/camel-mime-utils.c
@@ -4160,7 +4160,7 @@ struct _date_token {
 static struct _date_token *
 datetok (const gchar *date)
 {
-	struct _date_token *tokens = NULL, *token, *tail = (struct _date_token *) &tokens;
+	struct _date_token *tokens = NULL, *token, **tail = &tokens;
 	const gchar *start, *end;
 	guchar mask;
 
@@ -4187,8 +4187,8 @@ datetok (const gchar *date)
 			token->len = end - start;
 			token->mask = mask;
 
-			tail->next = token;
-			tail = token;
+			*tail = token;
+			tail = &token->next;
 		}
 
 		if (*end)
-- 
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