From f4ed6e3898b0e21cf131533bb9b4511ce82de86a Mon Sep 17 00:00:00 2001
From: Marc Jeanmougin <marc@jeanmougin.fr>
Date: Thu, 19 Nov 2015 22:15:59 +0100
Subject: fix for bug 1517740 (crash in some cases in selection sets)

Fixed bugs:
  - https://launchpad.net/bugs/1517740

(bzr r14478)
---
 src/uri-references.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'src/uri-references.cpp')

diff --git a/src/uri-references.cpp b/src/uri-references.cpp
index b6ccdbf5f..db46a156f 100644
--- a/src/uri-references.cpp
+++ b/src/uri-references.cpp
@@ -19,7 +19,7 @@
 #include "uri.h"
 #include "uri-references.h"
 #include "extract-uri.h"
-
+#include "sp-tag-use.h"
 #include <glibmm/miscutils.h>
 #include <sigc++/functors/mem_fun.h>
 
@@ -84,7 +84,14 @@ bool URIReference::_acceptObject(SPObject *obj) const
             positions.push_back(position);
             owner = owner->parent;
         }
-        owner = ((SPUse *)owner)->get_original();
+        if (dynamic_cast<SPUse *>(owner))
+            owner = ((SPUse *)owner)->get_original();
+        else if (dynamic_cast<SPTagUse *>(owner))
+            owner = ((SPTagUse *)owner)->get_original();
+        else {
+            g_warning("cloned object with no known type\n");
+            return false;
+        }
         for (int i = positions.size() - 2; i >= 0; i--)
             owner = owner->childList(false)[positions[i]];
     }
-- 
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