From e86ef017f25fd265bb4a43372b50444badccc9ba Mon Sep 17 00:00:00 2001
From: Kelly Thomas <kelly.thomas@hotmail.com.au>
Date: Wed, 6 Jun 2018 22:31:54 +0800
Subject: [PATCH] allow undefined GODOT_DEBUG_MSBUILD environment  variable

(cherry picked from commit 17516822f9424c6a94402339ee466f9d37264482)
---
 modules/mono/editor/GodotSharpTools/Build/BuildSystem.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/mono/editor/GodotSharpTools/Build/BuildSystem.cs b/modules/mono/editor/GodotSharpTools/Build/BuildSystem.cs
index a5dd37b5dc5..16beacb45c3 100644
--- a/modules/mono/editor/GodotSharpTools/Build/BuildSystem.cs
+++ b/modules/mono/editor/GodotSharpTools/Build/BuildSystem.cs
@@ -234,7 +234,7 @@ namespace GodotSharpTools.Build
 
         private static bool IsDebugMSBuildRequested()
         {
-            return Environment.GetEnvironmentVariable("GODOT_DEBUG_MSBUILD").Trim() == "1";
+            return Environment.GetEnvironmentVariable("GODOT_DEBUG_MSBUILD")?.Trim() == "1";
         }
 
         public void Dispose()