From 9a254643379ba0cbac8b36e3a3cc8f7b1c1ca0fa Mon Sep 17 00:00:00 2001
From: Jeff Young <jeff@rokeby.ie>
Date: Mon, 28 Nov 2022 13:38:26 +0000
Subject: [PATCH] Prevent nullptr dereference.

Fixes https://gitlab.com/kicad/code/kicad/issues/12516
---
 eeschema/sch_edit_frame.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/eeschema/sch_edit_frame.cpp b/eeschema/sch_edit_frame.cpp
index 97ce323f13..36bb651bea 100644
--- a/eeschema/sch_edit_frame.cpp
+++ b/eeschema/sch_edit_frame.cpp
@@ -708,7 +708,10 @@ void SCH_EDIT_FRAME::HardRedraw()
         item->ClearCaches();
 
     for( std::pair<const wxString, LIB_SYMBOL*>& libSymbol : screen->GetLibSymbols() )
-        libSymbol.second->ClearCaches();
+    {
+        if( libSymbol.second )
+            libSymbol.second->ClearCaches();
+    }
 
     RecalculateConnections( LOCAL_CLEANUP );