Comment 4 for bug 1585270

=== modified file 'src/vanishing-point.cpp'
--- src/vanishing-point.cpp 2016-08-03 14:56:48 +0000
+++ src/vanishing-point.cpp 2016-09-23 20:06:34 +0000
@@ -307,7 +307,7 @@
     this->_ungrabbed_connection.disconnect();

     /* unref should call destroy */
- knot_unref(this->knot);
+ //knot_unref(this->knot);
 }

 /**

prevents the crash but ends up in orphan knots (not ideal)