Merge branch 'master' of https://github.com/The-OpenROAD-Project-priv…

…ate/OpenROAD into grt_buffer_removal

src/gui/src/drcWidget.cpp

@@ -308,6 +308,10 @@ void DRCWidget::setLogger(utl::Logger* logger)
 
 void DRCWidget::selectReport()
 {
+  if (!block_) {
+    logger_->error(utl::GUI, 104, "No database has been loaded");
+  }
+
   // OpenLane uses .drc and OpenROAD-flow-scripts uses .rpt
   QString filename = QFileDialog::getOpenFileName(
       this,
@@ -647,7 +651,7 @@ void DRCWidget::loadTRReport(const QString& filename)
       std::string item_type = single_source.substr(0, ident);
       std::string item_name = single_source.substr(ident + 1);
 
-      std::any item = nullptr;
+      std::any item;
 
       if (item_type == "net") {
         odb::dbNet* net = block_->findNet(item_name.c_str());

src/gui/src/gui.cpp

@@ -1270,6 +1270,23 @@ void Gui::init(odb::dbDatabase* db, utl::Logger* logger)
   placement_density_heat_map_->registerHeatMap();
 }
 
+class SafeApplication : public QApplication
+{
+ public:
+  using QApplication::QApplication;
+
+  bool notify(QObject* receiver, QEvent* event) override
+  {
+    try {
+      return QApplication::notify(receiver, event);
+    } catch (std::exception& ex) {
+      // Ignored here as the message will be logged in the GUI
+    }
+
+    return false;
+  }
+};
+
 //////////////////////////////////////////////////
 
 // This is the main entry point to start the GUI.  It only
@@ -1284,7 +1301,7 @@ int startGui(int& argc,
   // ensure continue after close is false
   gui->clearContinueAfterClose();
 
-  QApplication app(argc, argv);
+  SafeApplication app(argc, argv);
   application = &app;
 
   // Default to 12 point for easier reading