From 655679e7da51e8e82af6f906e99b382a8e8eba44 Mon Sep 17 00:00:00 2001
From: Alexander 'z33ky' Hirsch <1zeeky@gmail.com>
Date: Mon, 23 Jun 2025 20:49:23 +0200
Subject: [PATCH] Check type of SQVector construction instance

This prevents manual invocations of the Vector.constructor with an
invalid value.
---
 sp/src/vscript/vscript_squirrel.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/sp/src/vscript/vscript_squirrel.cpp b/sp/src/vscript/vscript_squirrel.cpp
index 39139fec..f2a27755 100644
--- a/sp/src/vscript/vscript_squirrel.cpp
+++ b/sp/src/vscript/vscript_squirrel.cpp
@@ -327,7 +327,16 @@ namespace SQVector
 		}
 
 		SQUserPointer p;
-		sq_getinstanceup(vm, 1, &p, 0);
+		if (SQ_FAILED(sq_getinstanceup(vm, 1, &p, 0)))
+		{
+			return SQ_ERROR;
+		}
+
+		if (!p)
+		{
+			return sq_throwerror(vm, "Accessed null instance");
+		}
+
 		new (p) Vector(x, y, z);
 
 		return 0;