From 141c2ca04f479a877b8b9318818295c206cf1173 Mon Sep 17 00:00:00 2001
From: Lukas Merten <lukas.merten@rub.de>
Date: Tue, 30 Jan 2018 10:11:00 +0100
Subject: [PATCH] Solution for: Issue - Segfault extending by inheritance in
 python #165

---
 Extending-CRPropa.md | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Extending-CRPropa.md b/Extending-CRPropa.md
index 1dd2eb370..2866b4467 100644
--- a/Extending-CRPropa.md
+++ b/Extending-CRPropa.md
@@ -56,8 +56,11 @@ class MySourceFeature(SourceFeature):
     def prepareCandidate(self, candidate):
         candidate.setRedshift(0.6)
 
+# The source feature has to be created outside of the class attribute
+# s.add(MySourceFeature()) wil NOT work!
+srcFtr = MySourceFeature()
 s = Source()
-s.add(MySourceFeature())
+s.add(srcFtr)
 c = s.getCandidate()
 print c.getRedshift()
 ```