From ebf856edf9207edd47fe9318d2cb44f4eea25fac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kamil=20Ciu=C5=82a?=
 <35226723+kamil1094@users.noreply.github.com>
Date: Wed, 4 Dec 2024 16:28:52 +0100
Subject: [PATCH] fix: update operationMessagesUnambiguity rule validity check
 (#1038)

---
 .../src/ruleset/v3/functions/operationMessagesUnambiguity.ts    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/parser/src/ruleset/v3/functions/operationMessagesUnambiguity.ts b/packages/parser/src/ruleset/v3/functions/operationMessagesUnambiguity.ts
index 75c1d5206..6f09aec92 100644
--- a/packages/parser/src/ruleset/v3/functions/operationMessagesUnambiguity.ts
+++ b/packages/parser/src/ruleset/v3/functions/operationMessagesUnambiguity.ts
@@ -31,7 +31,7 @@ export const operationMessagesUnambiguity = createRulesetFunction<{ channel?: {'
     const channelPointer = targetVal.channel?.$ref as string; // required
 
     targetVal.messages?.forEach((message, index) => {      
-      if (!message.$ref.startsWith(`${channelPointer}/messages`)) {
+      if (message.$ref && !message.$ref.startsWith(`${channelPointer}/messages`)) {
         results.push({
           message: 'Operation message does not belong to the specified channel.',
           path: [...ctx.path, 'messages', index],