From ffbe0d1b9649351651de064a1a126effe8f46a33 Mon Sep 17 00:00:00 2001
From: Yorik van Havre <yorik@uncreated.net>
Date: Tue, 5 Apr 2022 16:02:44 +0200
Subject: [PATCH] Arch: workaround race condition in building part creation

---
 src/Mod/Arch/ArchBuildingPart.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Mod/Arch/ArchBuildingPart.py b/src/Mod/Arch/ArchBuildingPart.py
index ebb81d8ab5..4de74ba342 100644
--- a/src/Mod/Arch/ArchBuildingPart.py
+++ b/src/Mod/Arch/ArchBuildingPart.py
@@ -661,7 +661,8 @@ class ViewProviderBuildingPart:
         self.lco = coin.SoCoordinate3()
         self.sep.addChild(self.lco)
         lin = coin.SoType.fromName("SoBrepEdgeSet").createInstance()
-        lin.coordIndex.setValues([0,1,-1,2,3,-1,4,5,-1])
+        if lin:
+            lin.coordIndex.setValues([0,1,-1,2,3,-1,4,5,-1])
         self.sep.addChild(lin)
         self.bbox = coin.SoSwitch()
         self.bbox.whichChild = -1