From e822182bb71033c9899c837c01efa5c978c2cc02 Mon Sep 17 00:00:00 2001
From: kobewi <kobewi4e@gmail.com>
Date: Wed, 8 Feb 2023 20:19:24 +0100
Subject: [PATCH] Fix null message in assert()

---
 modules/gdscript/gdscript_vm.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/modules/gdscript/gdscript_vm.cpp b/modules/gdscript/gdscript_vm.cpp
index b99f5d26853..6c26e226a50 100644
--- a/modules/gdscript/gdscript_vm.cpp
+++ b/modules/gdscript/gdscript_vm.cpp
@@ -3427,7 +3427,10 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
 					String message_str;
 					if (_code_ptr[ip + 2] != 0) {
 						GET_VARIANT_PTR(message, 1);
-						message_str = *message;
+						Variant message_var = *message;
+						if (message->get_type() != Variant::NIL) {
+							message_str = message_var;
+						}
 					}
 					if (message_str.is_empty()) {
 						err_text = "Assertion failed.";