Starting program: /usr/portage/distfiles/svn-src/virtualbox/trunk/out/linux.amd64/debug/bin/VirtualBox -startvm TCOS
[Thread debugging using libthread_db enabled]
[New Thread 47354097476656 (LWP 14813)]
[New Thread 1073875280 (LWP 14816)]
[Thread 1073875280 (LWP 14816) exited]
Warning: VBOX_XPCOM_HOME not set.
Type Manifest File: /usr/portage/distfiles/svn-src/virtualbox/trunk/out/linux.amd64/debug/bin/components/xpti.dat
[New Thread 1082272080 (LWP 14817)]
[New Thread 1090664784 (LWP 14818)]
nsNativeComponentLoader: autoregistering begins.
nsNativeComponentLoader: autoregistering succeeded
nNCL: registering deferred (0)
[New Thread 1073875280 (LWP 14822)]

!!Assertion Failed!!
Expression: iface
Location  : /usr/portage/distfiles/svn-src/virtualbox/trunk/out/linux.amd64/debug/obj/src/VBox/Frontends/VirtualBox/VirtualBox/include/COMWrappers.h(8139) PRBool CUSBController::GetEnabled() const

Program received signal SIGTRAP, Trace/breakpoint trap.
[Switching to Thread 47354097476656 (LWP 14813)]
0x00000000004c68f7 in CUSBController::GetEnabled (this=0x7fff329ad5c0)
    at /usr/portage/distfiles/svn-src/virtualbox/trunk/out/linux.amd64/debug/obj/src/VBox/Frontends/VirtualBox/VirtualBox/include/COMWrappers.h:8139
8139        Assert (iface);