From 42ad987bb7de8a628cad840300f92d44cac67afb Mon Sep 17 00:00:00 2001
From: Haoyu Qiu <timothyqiu32@gmail.com>
Date: Sun, 13 Jun 2021 14:07:01 +0800
Subject: [PATCH] Validate parameter of
 SkeletonModificationStack2D::add_modification

---
 scene/resources/skeleton_modification_stack_2d.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/scene/resources/skeleton_modification_stack_2d.cpp b/scene/resources/skeleton_modification_stack_2d.cpp
index d12ec4add30..72c1c330eff 100644
--- a/scene/resources/skeleton_modification_stack_2d.cpp
+++ b/scene/resources/skeleton_modification_stack_2d.cpp
@@ -160,6 +160,8 @@ Ref<SkeletonModification2D> SkeletonModificationStack2D::get_modification(int p_
 }
 
 void SkeletonModificationStack2D::add_modification(Ref<SkeletonModification2D> p_mod) {
+	ERR_FAIL_COND(!p_mod.is_valid());
+
 	p_mod->_setup_modification(this);
 	modifications.push_back(p_mod);