fix crash in DocumentIndex::cloneViewProvider

2016-10-08 12:47:27 +02:00
parent 9ac1810ea3
commit 8a21cd4daa
1 changed files with 5 additions and 2 deletions
--- a/src/Gui/DocumentModel.cpp
+++ b/src/Gui/DocumentModel.cpp
@@ -225,8 +225,11 @@ namespace Gui {
        it = vp_nodes.find(&vp);
        if (it != vp_nodes.end()) {
            boost::unordered_set<ViewProviderIndex*>::const_iterator v;
-            v = it->second.begin();
-            return (*v)->clone();
+            if (!it->second.empty()) {
+                v = it->second.begin();
+                if (*v)
+                    return (*v)->clone();
+            }
        }
        return new ViewProviderIndex(vp, const_cast<DocumentIndex*>(this));
    }