StacktraceTop: __GI___pthread_mutex_lock (mutex=0x0) at ../nptl/pthread_mutex_lock.c:66 crWindowVisibleRegion (window=14396912, cRects=1109526272, pRects=0x7f3b422209c0) at /build/buildd/virtualbox-4.3.10-dfsg/src/VBox/Additions/common/crOpenGL/stub.c:149 RTAvlPVRebalance (pStack=<optimized out>) at /build/buildd/virtualbox-4.3.10-dfsg/src/VBox/Runtime/common/table/avl_Base.cpp.h:249 RTAvlPVRemove (ppTree=<optimized out>, Key=<optimized out>) at /build/buildd/virtualbox-4.3.10-dfsg/src/VBox/Runtime/common/table/avl_Base.cpp.h:456 rtSemEventMultiPosixWaitTimed (pSrcPos=0x0, uTimeout=139892489324288, fFlags=1109526272, pThis=0xdbadf0) at /build/buildd/virtualbox-4.3.10-dfsg/src/VBox/Runtime/r3/linux/../posix/semeventmulti-posix.cpp:482
StacktraceTop: _pthread_ mutex_lock (mutex=0x0) at ../nptl/ pthread_ mutex_lock. c:66 eRegion (window=14396912, cRects=1109526272, pRects= 0x7f3b422209c0) at /build/ buildd/ virtualbox- 4.3.10- dfsg/src/ VBox/Additions/ common/ crOpenGL/ stub.c: 149 buildd/ virtualbox- 4.3.10- dfsg/src/ VBox/Runtime/ common/ table/avl_ Base.cpp. h:249 buildd/ virtualbox- 4.3.10- dfsg/src/ VBox/Runtime/ common/ table/avl_ Base.cpp. h:456 iPosixWaitTimed (pSrcPos=0x0, uTimeout= 139892489324288 , fFlags=1109526272, pThis=0xdbadf0) at /build/ buildd/ virtualbox- 4.3.10- dfsg/src/ VBox/Runtime/ r3/linux/ ../posix/ semeventmulti- posix.cpp: 482
__GI__
crWindowVisibl
RTAvlPVRebalance (pStack=<optimized out>) at /build/
RTAvlPVRemove (ppTree=<optimized out>, Key=<optimized out>) at /build/
rtSemEventMult