Made the PopupMenu keep a weak reference to its LookAndFeel, so that it'll avoid crashing in situations where the L+F is deleted while the menu is still on-screen.

modules/juce_gui_basics/menus/juce_PopupMenu.cpp

@@ -1234,7 +1234,6 @@ private:
 
 //==============================================================================
 PopupMenu::PopupMenu()
-    : lookAndFeel (nullptr)
 {
 }
 

modules/juce_gui_basics/menus/juce_PopupMenu.h

@@ -614,7 +614,7 @@ private:
     friend class MenuBarComponent;
 
     OwnedArray<Item> items;
-    LookAndFeel* lookAndFeel;
+    WeakReference<LookAndFeel> lookAndFeel;
 
     Component* createWindow (const Options&, ApplicationCommandManager**) const;
     int showWithOptionalCallback (const Options&, ModalComponentManager::Callback*, bool);