From 9379e873b37d1f0d312c870dc3ba7e8268589dd2 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Sat, 21 Jan 2023 09:34:25 +0100
Subject: [PATCH] - error out when encountering an unknown $ token in SNSINFO.

No need to preserve this insanity from old ZDoom times.
---
 source/core/music/s_advsound.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/source/core/music/s_advsound.cpp b/source/core/music/s_advsound.cpp
index bbe0bf70d..7e4ffb4b6 100644
--- a/source/core/music/s_advsound.cpp
+++ b/source/core/music/s_advsound.cpp
@@ -425,6 +425,10 @@ static void S_AddSNDINFO (int lump)
 
 			default:
 			{ // Got a logical sound mapping
+				if (sc.String[0] == '$')
+				{
+					sc.ScriptError("%s: Unknown keyword");
+				}
 				FString name (sc.String);
 				if (wantassigns == -1)
 				{