StacktraceTop: __GI___pthread_mutex_lock (mutex=0x0) at ../nptl/pthread_mutex_lock.c:66 stubSyncThreadProc (ThreadSelf=0x15d28f0, pvUser=<optimized out>) at /build/buildd/virtualbox-4.3.6-dfsg/src/VBox/Additions/common/crOpenGL/load.c:898 rtThreadMain (pThread=0x15d28f0, NativeThread=<optimized out>, pszThreadName=<optimized out>) at /build/buildd/virtualbox-4.3.6-dfsg/src/VBox/Runtime/common/misc/thread.cpp:712 rtThreadNativeMain (pvArgs=0x15d28f0) at /build/buildd/virtualbox-4.3.6-dfsg/src/VBox/Runtime/r3/posix/thread-posix.cpp:324 start_thread (arg=0x7fe684af2700) at pthread_create.c:312
StacktraceTop: _pthread_ mutex_lock (mutex=0x0) at ../nptl/ pthread_ mutex_lock. c:66 0x15d28f0, pvUser=<optimized out>) at /build/ buildd/ virtualbox- 4.3.6-dfsg/ src/VBox/ Additions/ common/ crOpenGL/ load.c: 898 <optimized out>, pszThreadName= <optimized out>) at /build/ buildd/ virtualbox- 4.3.6-dfsg/ src/VBox/ Runtime/ common/ misc/thread. cpp:712 buildd/ virtualbox- 4.3.6-dfsg/ src/VBox/ Runtime/ r3/posix/ thread- posix.cpp: 324 2700) at pthread_ create. c:312
__GI__
stubSyncThreadProc (ThreadSelf=
rtThreadMain (pThread=0x15d28f0, NativeThread=
rtThreadNativeMain (pvArgs=0x15d28f0) at /build/
start_thread (arg=0x7fe684af