From 5255f69c14d2c19f0e2f1f4ae8d9a106c92d3b8c Mon Sep 17 00:00:00 2001
From: Kevin Lamonte <kevin.lamonte@gmail.com>
Date: Wed, 27 Dec 2017 18:41:34 -0500
Subject: [PATCH 1/1] #25 fix NPE on double-click in secondary thread

---
 src/jexer/TApplication.java | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/jexer/TApplication.java b/src/jexer/TApplication.java
index ee2e9de..34f1559 100644
--- a/src/jexer/TApplication.java
+++ b/src/jexer/TApplication.java
@@ -1125,8 +1125,14 @@ public class TApplication implements Runnable {
         }
 
         secondaryEventReceiver.handleEvent(event);
-        if (doubleClick != null) {
-            secondaryEventReceiver.handleEvent(doubleClick);
+        // Note that it is possible for secondaryEventReceiver to be null
+        // now, because its handleEvent() might have finished out on the
+        // secondary thread.  So put any extra processing inside a null
+        // check.
+        if (secondaryEventReceiver != null) {
+            if (doubleClick != null) {
+                secondaryEventReceiver.handleEvent(doubleClick);
+            }
         }
     }
 
-- 
2.27.0