From 7cc48870bafc5e1be6abe63e2c274c47afd9670e Mon Sep 17 00:00:00 2001
From: Willian Galvani <williangalvani@gmail.com>
Date: Mon, 17 Dec 2018 20:40:56 -0200
Subject: [PATCH] PositionManager: fix bad cleaning of pointers

---
 src/PositionManager/PositionManager.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/PositionManager/PositionManager.cpp b/src/PositionManager/PositionManager.cpp
index 88c4e2520..5de73d0f6 100644
--- a/src/PositionManager/PositionManager.cpp
+++ b/src/PositionManager/PositionManager.cpp
@@ -50,8 +50,19 @@ void QGCPositionManager::setToolbox(QGCToolbox *toolbox)
 
 void QGCPositionManager::setNmeaSourceDevice(QIODevice* device)
 {
+    // stop and release _nmeaSource
     if (_nmeaSource) {
+        _nmeaSource->stopUpdates();
+        disconnect(_nmeaSource);
+
+        // if _currentSource is pointing there, point to null
+        if (_currentSource == _nmeaSource){
+            _currentSource = nullptr;
+        }
+
         delete _nmeaSource;
+        _nmeaSource = nullptr;
+
     }
     _nmeaSource = new QNmeaPositionInfoSource(QNmeaPositionInfoSource::RealTimeMode, this);
     _nmeaSource->setDevice(device);
-- 
2.22.0