Comment 2 for bug 1120844

StacktraceTop:
 Bstr (that=..., this=0x7f2e2467e930) at /build/buildd/virtualbox-4.1.22-dfsg/include/VBox/com/ErrorInfo.h:315
 com::Utf8Str::cloneTo (this=0x0, pstr=0x7f2e10024940) at /build/buildd/virtualbox-4.1.22-dfsg/include/VBox/com/string.h:534
 Machine::GetName (this=0x7f2e08019770, aName=0x7f2e10024940) at /build/buildd/virtualbox-4.1.22-dfsg/src/VBox/Main/src-server/MachineImpl.cpp:958
 VBoxNsxpXPTC_InvokeByIndex (that=0x7f2e080197c0, methodIndex=6, paramCount=<optimized out>, params=<optimized out>) at /build/buildd/virtualbox-4.1.22-dfsg/src/libs/xpcom18a4/xpcom/reflect/xptcall/src/md/unix/xptcinvoke_x86_64_linux.cpp:209
 ipcDConnectService::OnInvoke (this=0x207df60, peer=1, invoke=0x207e3f0, opLen=<optimized out>) at /build/buildd/virtualbox-4.1.22-dfsg/src/libs/xpcom18a4/ipc/ipcd/extensions/dconnect/src/ipcDConnectService.cpp:3931