Index: /trunk/src/VBox/Main/src-server/MachineImpl.cpp
===================================================================
--- /trunk/src/VBox/Main/src-server/MachineImpl.cpp	(revision 50434)
+++ /trunk/src/VBox/Main/src-server/MachineImpl.cpp	(revision 50435)
@@ -572,4 +572,8 @@
         else
         {
+            /* Ignore all errors from unregistering, they would destroy
+             * the more interesting error information we already have,
+             * pinpointing the issue with the VM config. */
+            ErrorInfoKeeper eik;
             autoInitSpan.setLimited();