Don't race to a double-delete, LambdaThread deletes its own thread

qrenderdoc/Code/CaptureContext.h

@@ -230,6 +230,7 @@ public slots:
     m_Thread->quit();
     deleteLater();
     m_Thread->deleteLater();
+    m_Thread = NULL;
   }
 
 public:
@@ -242,7 +243,7 @@ public:
   }
 
   void start(QThread::Priority prio = QThread::InheritPriority) { m_Thread->start(prio); }
-  bool isRunning() { return m_Thread->isRunning(); }
+  bool isRunning() { return m_Thread && m_Thread->isRunning(); }
 };
 
 // helper for doing a manual blocking invoke of a dialog

qrenderdoc/Code/RenderManager.cpp

@@ -94,7 +94,7 @@ void RenderManager::CloseThread()
   {
   }
 
-  m_Thread->deleteLater();
+  // the thread deletes itself, don't delete here
 
   m_Thread = NULL;
 }