From 83dca78ab6b101853bb5e10078de2d216f9da9df Mon Sep 17 00:00:00 2001
From: zheng <zheng@finereport.com>
Date: Fri, 30 Mar 2018 11:12:49 +0800
Subject: [PATCH] npe

---
 src/com/fr/plugin/demo/DemoChart.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/com/fr/plugin/demo/DemoChart.java b/src/com/fr/plugin/demo/DemoChart.java
index f06a0ae..05c6818 100644
--- a/src/com/fr/plugin/demo/DemoChart.java
+++ b/src/com/fr/plugin/demo/DemoChart.java
@@ -56,7 +56,9 @@ public class DemoChart extends AbstractChart<DemoDataConfig>{
     @Override
     public Object clone() throws CloneNotSupportedException {
         DemoChart result = (DemoChart) super.clone();
-        result.setTitleFormula(this.getTitleFormula().clone());
+        if (getTitleFormula() != null) {
+            result.setTitleFormula(this.getTitleFormula().clone());
+        }
         return result;
     }