From 952be0b49196b9410118bd130928e2c38b35ac4d Mon Sep 17 00:00:00 2001
From: Stephan Sundermann <stephansundermann@gmail.com>
Date: Fri, 6 Mar 2015 22:45:03 +0100
Subject: [PATCH] Don't visit invalid units

---
 src/Generator/Passes/Pass.cs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Generator/Passes/Pass.cs b/src/Generator/Passes/Pass.cs
index d9bb6efe..d5d84404 100644
--- a/src/Generator/Passes/Pass.cs
+++ b/src/Generator/Passes/Pass.cs
@@ -30,6 +30,9 @@ namespace CppSharp.Passes
 
         public virtual bool VisitTranslationUnit(TranslationUnit unit)
         {
+            if (!unit.IsValid)
+                return false;
+
             if (unit.IsSystemHeader)
                 return false;