From 1d18d8080fb30ed273217ef22ab8ad2b40787ed4 Mon Sep 17 00:00:00 2001
From: Phillip Stephens <antidote.crk@gmail.com>
Date: Thu, 18 Feb 2016 08:33:34 -0800
Subject: [PATCH] Fix crash when encountering invalid identifier

---
 hecl/lib/Frontend/Lexer.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hecl/lib/Frontend/Lexer.cpp b/hecl/lib/Frontend/Lexer.cpp
index 670c0c81e..833dba6a3 100644
--- a/hecl/lib/Frontend/Lexer.cpp
+++ b/hecl/lib/Frontend/Lexer.cpp
@@ -407,7 +407,7 @@ void Lexer::EmitVec4(IR& ir, const Lexer::OperationNode* funcNode, IR::RegID tar
     const Parser::Token* imms[4];
     for (int i=0 ; i<4 ; ++i)
     {
-        if (!gn->m_sub || gn->m_sub->m_tok.m_type != Parser::TokenType::NumLiteral)
+        if (!gn || !gn->m_sub || gn->m_sub->m_tok.m_type != Parser::TokenType::NumLiteral)
         {
             opt = false;
             break;