From df76c26fbb4995053c81c0006d25d56398f7521e Mon Sep 17 00:00:00 2001
From: Berserker <fabian.dill@web.de>
Date: Sun, 8 Mar 2026 21:21:39 +0100
Subject: [PATCH] Core: add assertion preventing building with empty platforms
 list

---
 worlds/LauncherComponents.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/worlds/LauncherComponents.py b/worlds/LauncherComponents.py
index 19be413708..e0db60b941 100644
--- a/worlds/LauncherComponents.py
+++ b/worlds/LauncherComponents.py
@@ -289,6 +289,12 @@ if not is_frozen():
             if not worldtype:
                 logging.error(f"Requested APWorld \"{worldname}\" does not exist.")
                 continue
+
+            assert worldtype.platforms != [], (
+                f"World {worldname} has an empty list for platforms. "
+                "Use None or omit the attribute for 'any platform'."
+            )
+
             file_name = os.path.split(os.path.dirname(worldtype.__file__))[1]
             world_directory = os.path.join("worlds", file_name)
             if os.path.isfile(os.path.join(world_directory, "archipelago.json")):