added preventive removal of ipc channel

src/gui/qt-daemon/application/mainwindow.cpp

@@ -744,11 +744,25 @@ void qt_log_message_handler(QtMsgType type, const QMessageLogContext &context, c
     }
 }
 
+bool MainWindow::remove_ipc()
+{
+  try {
+    boost::interprocess::message_queue::remove(GUI_IPC_MESSAGE_CHANNEL_NAME);
+  }
+  catch (...)
+  {
+  }
+  return true;
+}
  
 
 bool MainWindow::init_ipc_server()
 {
 
+  //in case previous instance wasn't close graceful, ipc channel will remain open and new creation will fail, so we 
+  //trying to close it anyway before open, to make sure there are no dead channels. If there are another running instance, it wom't 
+  //let channel to close, so it will fail later on creating channel
+  remove_ipc();
 #define GUI_IPC_BUFFER_SIZE  10000
   try {
     //Create a message queue.
@@ -775,18 +789,19 @@ bool MainWindow::init_ipc_server()
             handle_ipc_event(buff);//todo process token
           }
         }        
-        boost::interprocess::message_queue::remove(GUI_IPC_MESSAGE_CHANNEL_NAME);
+        remove_ipc();
         LOG_PRINT_L0("IPC Handling thread finished");
       }
       catch (const std::exception& ex)
       {
+        remove_ipc();
         boost::interprocess::message_queue::remove(GUI_IPC_MESSAGE_CHANNEL_NAME);
         LOG_ERROR("Failed to receive IPC que: " << ex.what());
       }
 
       catch (...)
       {
-        boost::interprocess::message_queue::remove(GUI_IPC_MESSAGE_CHANNEL_NAME);
+        remove_ipc();
         LOG_ERROR("Failed to receive IPC que: unknown exception");
       }
     });

src/gui/qt-daemon/application/mainwindow.h

@@ -240,6 +240,7 @@ private:
   bool load_app_config();
   bool init_window();
   bool init_ipc_server();
+  bool remove_ipc();
   
 
   std::string get_wallet_log_prefix(size_t wallet_id) const { return m_backend.get_wallet_log_prefix(wallet_id); }