From f6f457ffa48a21e26249e74bf11766dd448e030b Mon Sep 17 00:00:00 2001
From: hneemann <helmut.neemann@arcor.de>
Date: Sat, 13 Mar 2021 17:30:42 +0100
Subject: [PATCH] fixes a NullPointerException

---
 .../de/neemann/digital/gui/components/CircuitComponent.java     | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/main/java/de/neemann/digital/gui/components/CircuitComponent.java b/src/main/java/de/neemann/digital/gui/components/CircuitComponent.java
index 794253dd7..b5de9704f 100644
--- a/src/main/java/de/neemann/digital/gui/components/CircuitComponent.java
+++ b/src/main/java/de/neemann/digital/gui/components/CircuitComponent.java
@@ -1542,6 +1542,8 @@ public class CircuitComponent extends JComponent implements ChangedListener, Lib
         }
 
         private boolean wasMoved(MouseEvent e) {
+            if (pos == null) // seems to happen in very rare cases
+                return false;
             Vector d = new Vector(e.getX(), e.getY()).sub(pos);
             return Math.abs(d.x) > DRAG_DISTANCE || Math.abs(d.y) > DRAG_DISTANCE;
         }