From bd60f38569f47cd0ff91c8029d1b51da61061e64 Mon Sep 17 00:00:00 2001
From: Jeff Young <jeff@rokeby.ie>
Date: Mon, 3 Apr 2023 18:09:21 +0100
Subject: [PATCH] Possible protection from acessing deleted window data.

(Long shot for Sentry KICAD-MM.)
---
 eeschema/symbol_editor/symbol_edit_frame.h | 9 ++++++++-
 pcbnew/footprint_edit_frame.cpp            | 4 ++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/eeschema/symbol_editor/symbol_edit_frame.h b/eeschema/symbol_editor/symbol_edit_frame.h
index 216bbeb499..b363f26a21 100644
--- a/eeschema/symbol_editor/symbol_edit_frame.h
+++ b/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;
 
diff --git a/pcbnew/footprint_edit_frame.cpp b/pcbnew/footprint_edit_frame.cpp
index b5c1a0851f..97fa4e93db 100644
--- a/pcbnew/footprint_edit_frame.cpp
+++ b/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 );