From a8332e30f0ee82712d303f29e96fbc9e0c0aae49 Mon Sep 17 00:00:00 2001
From: George Marques <george@gmarqu.es>
Date: Tue, 26 May 2020 20:38:44 -0300
Subject: [PATCH] GDScript: Fix assert message when no custom message is set

(cherry picked from commit f29a2e2606317e0964ffed287187afe6bf115626)
---
 modules/gdscript/gdscript_function.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/modules/gdscript/gdscript_function.cpp b/modules/gdscript/gdscript_function.cpp
index 027350a665d..82829856dfa 100644
--- a/modules/gdscript/gdscript_function.cpp
+++ b/modules/gdscript/gdscript_function.cpp
@@ -1501,11 +1501,14 @@ Variant GDScriptFunction::call(GDScriptInstance *p_instance, const Variant **p_a
 
 #ifdef DEBUG_ENABLED
 				GET_VARIANT_PTR(test, 1);
-				GET_VARIANT_PTR(message, 2);
 				bool result = test->booleanize();
 
 				if (!result) {
-					const String &message_str = *message;
+					String message_str;
+					if (_code_ptr[ip + 2] != 0) {
+						GET_VARIANT_PTR(message, 2);
+						message_str = *message;
+					}
 					if (message_str.empty()) {
 						err_text = "Assertion failed.";
 					} else {