From 00a7b7edc76ef4e1595e084ea0ce986dce999c6c Mon Sep 17 00:00:00 2001
From: Sampo Niskanen <sampo.niskanen@iki.fi>
Date: Tue, 23 Dec 2014 23:48:51 +0200
Subject: [PATCH] Fix copy-paste bug

---
 core/src/net/sf/openrocket/document/Simulation.java | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/src/net/sf/openrocket/document/Simulation.java b/core/src/net/sf/openrocket/document/Simulation.java
index eebc32532..5a8b8ed23 100644
--- a/core/src/net/sf/openrocket/document/Simulation.java
+++ b/core/src/net/sf/openrocket/document/Simulation.java
@@ -435,6 +435,7 @@ public class Simulation implements ChangeSource, Cloneable {
 			copy.mutex = SafetyMutex.newInstance();
 			copy.status = Status.NOT_SIMULATED;
 			copy.options = this.options.clone();
+			copy.simulationExtensions = new ArrayList<SimulationExtension>();
 			for (SimulationExtension c : this.simulationExtensions) {
 				copy.simulationExtensions.add(c.clone());
 			}