From 9c6c2f09e07e65f7819920c4954a7fd54b37d3f6 Mon Sep 17 00:00:00 2001
From: Angad Kambli <angadkambli@gmail.com>
Date: Wed, 17 Feb 2021 21:17:57 +0530
Subject: [PATCH] Check parameter validity in `Object::set_script`

Fixes #46120.
---
 core/object/object.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/core/object/object.cpp b/core/object/object.cpp
index c76188a2cd3..4d19a2c75bd 100644
--- a/core/object/object.cpp
+++ b/core/object/object.cpp
@@ -836,14 +836,16 @@ void Object::set_script(const Variant &p_script) {
 		return;
 	}
 
+	Ref<Script> s = p_script;
+	ERR_FAIL_COND_MSG(s.is_null() && !p_script.is_null(), "Invalid parameter, it should be a reference to a valid script (or null).");
+
+	script = p_script;
+
 	if (script_instance) {
 		memdelete(script_instance);
 		script_instance = nullptr;
 	}
 
-	script = p_script;
-	Ref<Script> s = script;
-
 	if (!s.is_null()) {
 		if (s->can_instantiate()) {
 			OBJ_DEBUG_LOCK