versioncontrol: Prevent a use-after-free in UpdateItemStatesThread

UpdateItemStatesThread kept a pointer reference to m_plugin whose
lifetime was tied to VersionControlObserver parents.
On application shutdown it could happen the thread is still running when
the Observer is destroyed.

Make the plugin pointer a weak reference, allowing to stop the thread
when the plugin is gone.

BUG: 477425

1 files changed, 2 insertions, 1 deletions

diff --git a/src/views/versioncontrol/updateitemstatesthread.h b/src/views/versioncontrol/updateitemstatesthread.h
index 24f060d26..550436010 100644
--- a/src/views/versioncontrol/updateitemstatesthread.h
+++ b/src/views/versioncontrol/updateitemstatesthread.h
@@ -11,6 +11,7 @@
 #include "views/versioncontrol/versioncontrolobserver.h"
 
 #include <QMutex>
+#include <QPointer>
 #include <QThread>
 
 /**
@@ -41,7 +42,7 @@ protected:
 
 private:
     QMutex *m_globalPluginMutex; // Protects the m_plugin globally
-    KVersionControlPlugin *m_plugin;
+    QPointer<KVersionControlPlugin> m_plugin;
 
     QMap<QString, QVector<VersionControlObserver::ItemState>> m_itemStates;
 };