From 649a767f6aa476664d9a112485e4d546786250ae Mon Sep 17 00:00:00 2001
From: Roy-043 <70520633+Roy-043@users.noreply.github.com>
Date: Wed, 20 Jan 2021 19:17:30 +0100
Subject: [PATCH] Update ArchRoof.py

A relative profile can now be used if it references itself. This fixes a compatibility issue with the V0.18 version of ArchRoof, where the first profile initially always references itself.
---
 src/Mod/Arch/ArchRoof.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Mod/Arch/ArchRoof.py b/src/Mod/Arch/ArchRoof.py
index cb81df88a5..3a422a513c 100644
--- a/src/Mod/Arch/ArchRoof.py
+++ b/src/Mod/Arch/ArchRoof.py
@@ -438,8 +438,9 @@ class _Roof(ArchComponent.Component):
         rel = profilCurr["idrel"]
         if i != rel and 0 <= rel < numEdges:
             profilRel = self.profilsDico[rel]
-            # do not use data from the relative profile if it in turn references a relative profile:
-            if 0 <= profilRel["idrel"] < numEdges:
+            # do not use data from the relative profile if it in turn references a relative profile
+            # other than itself:
+            if 0 <= profilRel["idrel"] < numEdges and rel != profilRel["idrel"]:
                 hgt = self.calcHeight(i)
                 profilCurr["height"] = hgt
             elif ang == 0.0 and run == 0.0: