Ensure QObject context is retained to avoid crashesv5.12.0-beta4

If the public class is deleted pending lambda invocation can cause
crashes unless QObject context is provided. This fixes a regression
introduced by 819bb06c2cb3372cb1bb9ddd7f3a504f78d3452d.

This was discovered while investigating QTBUG-71479.

Change-Id: I3a49916ce6d9425c684863bb0b04a10bd3e652b9
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/bluetooth/qbluetoothservicediscoveryagent.cpp b/src/bluetooth/qbluetoothservicediscoveryagent.cpp
index 3260d7db..390b9f74 100644
--- a/src/bluetooth/qbluetoothservicediscoveryagent.cpp
+++ b/src/bluetooth/qbluetoothservicediscoveryagent.cpp
@@ -435,16 +435,16 @@ void QBluetoothServiceDiscoveryAgentPrivate::startDeviceDiscovery()
         deviceDiscoveryAgent = new QBluetoothDeviceDiscoveryAgent(q);
 #endif
         QObject::connect(deviceDiscoveryAgent, &QBluetoothDeviceDiscoveryAgent::finished,
-                         [this](){
+                         q, [this](){
             this->_q_deviceDiscoveryFinished();
         });
         QObject::connect(deviceDiscoveryAgent, &QBluetoothDeviceDiscoveryAgent::deviceDiscovered,
-                         [this](const QBluetoothDeviceInfo &info){
+                         q, [this](const QBluetoothDeviceInfo &info){
             this->_q_deviceDiscovered(info);
         });
         QObject::connect(deviceDiscoveryAgent,
                          QOverload<QBluetoothDeviceDiscoveryAgent::Error>::of(&QBluetoothDeviceDiscoveryAgent::error),
-                         [this](QBluetoothDeviceDiscoveryAgent::Error newError){
+                         q, [this](QBluetoothDeviceDiscoveryAgent::Error newError){
             this->_q_deviceDiscoveryError(newError);
         });
     }