From 1139a1b6acbe839826742992b2051500ff37f9f4 Mon Sep 17 00:00:00 2001
From: sephiroth99 <sephiroth99@gmail.com>
Date: Thu, 4 Jun 2015 23:52:47 -0400
Subject: [PATCH] gl4: fix nullptr dereference in GL4Shader::CompileProgram

A nullptr dereference will occur when the disassembly string is not
found, which will obviously happen on AMD. Check for the condition and
if it is not found, put a message indicating so.
---
 src/xenia/gpu/gl4/gl4_shader.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/xenia/gpu/gl4/gl4_shader.cc b/src/xenia/gpu/gl4/gl4_shader.cc
index e2e20be14..798bd06c5 100644
--- a/src/xenia/gpu/gl4/gl4_shader.cc
+++ b/src/xenia/gpu/gl4/gl4_shader.cc
@@ -424,7 +424,11 @@ bool GL4Shader::CompileProgram(std::string source) {
       search_offset = p - search_start;
       ++search_offset;
     }
-    host_disassembly_ = std::string(disasm_start);
+    if (disasm_start) {
+      host_disassembly_ = std::string(disasm_start);
+    } else {
+      host_disassembly_ = std::string("Shader disassembly not available.");
+    }
 
     // Append to shader dump.
     if (FLAGS_dump_shaders.size()) {