From b72f819d57060179a6e0cf92ab0d62cf04518c01 Mon Sep 17 00:00:00 2001
From: Matthias Koefferlein <matthias@koefferlein.de>
Date: Sat, 6 Jun 2020 10:25:20 +0200
Subject: [PATCH] Fixed a potential segfault.

---
 src/laybasic/laybasic/layLayoutView.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/laybasic/laybasic/layLayoutView.cc b/src/laybasic/laybasic/layLayoutView.cc
index 44d534acf..91d0fe807 100644
--- a/src/laybasic/laybasic/layLayoutView.cc
+++ b/src/laybasic/laybasic/layLayoutView.cc
@@ -4739,7 +4739,9 @@ LayoutView::active_library_changed (int /*index*/)
 void
 LayoutView::cellview_changed (unsigned int index)
 {
-  mp_hierarchy_panel->do_update_content (index);
+  if (mp_hierarchy_panel) {
+    mp_hierarchy_panel->do_update_content (index);
+  }
 
   cellview_changed_event (index);