Possible protection from acessing deleted window data.

(Long shot for Sentry KICAD-MM.)

eeschema/symbol_editor/symbol_edit_frame.h

@@ -247,7 +247,14 @@ public:
         UpdateSymbolMsgPanelInfo();
     }
 
-    bool IsSymbolFromSchematic() const { return m_isSymbolFromSchematic; }
+    bool IsSymbolFromSchematic() const
+    {
+        // If we've already vetted closing this window, then we have no symbol anymore
+        if( m_isClosing )
+            return false;
+
+        return m_isSymbolFromSchematic;
+    }
 
     bool IsSymbolFromLegacyLibrary() const;
 

pcbnew/footprint_edit_frame.cpp

@@ -494,6 +494,10 @@ void FOOTPRINT_EDIT_FRAME::ClearModify()
 
 bool FOOTPRINT_EDIT_FRAME::IsCurrentFPFromBoard() const
 {
+    // If we've already vetted closing this window, then we have no FP anymore
+    if( m_isClosing )
+        return false;
+
     FOOTPRINT* footprint = GetBoard()->GetFirstFootprint();
 
     return ( footprint && footprint->GetLink() != niluuid );