From d20549b27a9645519ed86d573b934e5e70094ffb Mon Sep 17 00:00:00 2001
From: Maciej Suminski <maciej.suminski@cern.ch>
Date: Wed, 3 Feb 2016 17:37:15 +0100
Subject: [PATCH] vhdlpp: Fixed a crash in case of dynamic_cast failure.

---
 vhdlpp/architec_elaborate.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/vhdlpp/architec_elaborate.cc b/vhdlpp/architec_elaborate.cc
index e35209f33..87294ebfb 100644
--- a/vhdlpp/architec_elaborate.cc
+++ b/vhdlpp/architec_elaborate.cc
@@ -258,6 +258,8 @@ int ProcessStatement::rewrite_as_always_edge_(Entity*, Architecture*)
 	    return -1;
 
       const ExpCharacter*op2b = dynamic_cast<const ExpCharacter*>(op2b_raw);
+      if (op2b == 0)
+	    return -1;
       if (op2b->value() != '1' && op2b->value() != '0')
 	    return -1;