From bb479e5010eed3b2c3f7ceeba04db3679cb079df Mon Sep 17 00:00:00 2001
From: Christian Speckner <christian.speckner@mayflower.de>
Date: Mon, 11 Oct 2021 17:46:47 +0200
Subject: [PATCH] Fix segfault on invalid PlusROM URL.

---
 src/emucore/PlusROM.cxx | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/emucore/PlusROM.cxx b/src/emucore/PlusROM.cxx
index 3476dfd4c..5c93155ab 100644
--- a/src/emucore/PlusROM.cxx
+++ b/src/emucore/PlusROM.cxx
@@ -99,6 +99,22 @@ class PlusROMRequest {
         "application/octet-stream"
       );
 
+      if (!response) {
+        ostringstream ss;
+        ss
+          << "PlusCart: request to "
+          << myDestination.host
+          << "/"
+          << myDestination.path
+          << ": failed --- bad URL";
+
+        Logger::error(ss.str());
+
+        myState = State::failed;
+
+        return;
+      }
+
       if (response->status != 200) {
         ostringstream ss;
         ss