From c2d3d22271cb81aacce318df85a1cf8be1ad8122 Mon Sep 17 00:00:00 2001
From: Jason C <JC3@users.noreply.github.com>
Date: Sat, 1 May 2021 10:58:29 -0400
Subject: [PATCH] Fix crash in CanRead when file can not be opened.

Addresses #3849
---
 code/AssetLib/M3D/M3DImporter.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/code/AssetLib/M3D/M3DImporter.cpp b/code/AssetLib/M3D/M3DImporter.cpp
index 8cbda23cb..91fa54b75 100644
--- a/code/AssetLib/M3D/M3DImporter.cpp
+++ b/code/AssetLib/M3D/M3DImporter.cpp
@@ -137,7 +137,7 @@ bool M3DImporter::CanRead(const std::string &pFile, IOSystem *pIOHandler, bool c
         */
         std::unique_ptr<IOStream> pStream(pIOHandler->Open(pFile, "rb"));
         unsigned char data[4];
-        if (4 != pStream->Read(data, 1, 4)) {
+        if (!pStream || 4 != pStream->Read(data, 1, 4)) {
             return false;
         }
         return !memcmp(data, "3DMO", 4) /* bin */