From dfe734f3f1140504e0747c76f46b2931b32bae1b Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Sun, 30 Sep 2018 14:56:47 +0200
Subject: [PATCH] fix infinite recursion when creating dependency graph with
 loops

---
 src/App/Document.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/App/Document.cpp b/src/App/Document.cpp
index e0dedfb0b0..3ac0753d23 100644
--- a/src/App/Document.cpp
+++ b/src/App/Document.cpp
@@ -525,8 +525,13 @@ void Document::exportGraphviz(std::ostream& out) const
             setGraphLabel(sub, cs);
 
             for(auto obj : cs->getOutList()) {
-                if(obj->hasExtension(GeoFeatureGroupExtension::getExtensionClassTypeId()))
-                    recursiveCSSubgraphs(obj, cs);
+                if (obj->hasExtension(GeoFeatureGroupExtension::getExtensionClassTypeId())) {
+                    // in case of dependencies loops check if obj is already part of the
+                    // map to avoid infinite recursions
+                    auto it = GraphList.find(obj);
+                    if (it == GraphList.end())
+                        recursiveCSSubgraphs(obj, cs);
+                }
             }
 
             //setup the origin if available