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Date: Tue, 22 Oct 2013 12:02:09 -0700
From: Yuri <yuri@rawbw.com>
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To: emulation@freebsd.org
Subject: virtualbox-ose-4.2.18: asserts during (maybe after) creating a
 snapshot
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This is certainly a new problem:
00:07:51.752608 !!Assertion Failed!!
00:07:51.752608 Expression: that->mMachineState == enmMachineState
00:07:51.752610 Location  : 
/usr/ports/emulators/virtualbox-ose/work/VirtualBox-4.2.18/src/VBox/Main/src-client/ConsoleImpl.cpp(9746) 
static int Console::fntTakeSnapshotWorker(RTTHREADINT*, void*)
00:07:51.752665
00:07:51.752666 !!Assertion Failed!!
00:07:51.752666 Expression: <NULL>

Got this on Ubuntu 64-bit VM, originally installed few VBox versions ago.

Yuri