From 66d31b02be665b0a6342588c51f994050facca32 Mon Sep 17 00:00:00 2001
From: Maciej Suminski <maciej.suminski@cern.ch>
Date: Fri, 1 Aug 2014 15:13:19 +0200
Subject: [PATCH] Fixed vhdlpp segfault if it processes an entity without any
 ports declared.

---
 vhdlpp/entity.cc | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/vhdlpp/entity.cc b/vhdlpp/entity.cc
index 4df745412..4d92f7ddc 100644
--- a/vhdlpp/entity.cc
+++ b/vhdlpp/entity.cc
@@ -47,9 +47,12 @@ void ComponentBase::set_interface(std::list<InterfacePort*>*parms,
 		  parms->pop_front();
 	    }
       }
-      while (! ports->empty()) {
-	    ports_.push_back(ports->front());
-	    ports->pop_front();
+
+      if (ports) {
+        while (! ports->empty()) {
+          ports_.push_back(ports->front());
+          ports->pop_front();
+        }
       }
 }