GNU gdb (Debian 7.12-6+b1) 7.12.0.20161007-git
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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Reading symbols from ./fg.git/bin/fgfs...(no debugging symbols found)...done.
[New LWP 9223]
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[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/home/anders/FlightGear/fg.git/bin/fgfs --config=/home/anders/.fgfs/preferences'.
Program terminated with signal SIGABRT, Aborted.
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
[Current thread is 1 (Thread 0x7f71afbfc700 (LWP 9223))]

Thread 17 (Thread 0x7f71b13ff700 (LWP 9220)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f71beb61beb in OpenThreads::Barrier::block (this=<optimized out>, 
    numThreads=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/OpenThreads/pthreads/PThreadBarrier.cpp:183
#2  0x00007f71bef1bcc5 in osg::OperationThread::run (this=0x7f71b3349200)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/OperationThread.cpp:432
#3  0x00007f71beb618e1 in OpenThreads::ThreadPrivateActions::StartThread (
    data=0x7f71b3349218)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/OpenThreads/pthreads/PThread.cpp:206
#4  0x00007f71c08bf494 in start_thread (arg=0x7f71b13ff700)
    at pthread_create.c:333
#5  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 16 (Thread 0x7f71b19cc700 (LWP 9234)):
#0  0x00007f71bc10466d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f71b648307e in ?? () from /usr/lib/x86_64-linux-gnu/libasound.so.2
#2  0x00007f71b648334b in snd_pcm_wait ()
   from /usr/lib/x86_64-linux-gnu/libasound.so.2
#3  0x00007f71c16dcf0a in ?? () from /usr/lib/x86_64-linux-gnu/libopenal.so.1
#4  0x00007f71c16e8007 in ?? () from /usr/lib/x86_64-linux-gnu/libopenal.so.1
#5  0x00007f71c08bf494 in start_thread (arg=0x7f71b19cc700)
    at pthread_create.c:333
#6  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 15 (Thread 0x7f71817fe700 (LWP 9241)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f71beb61dfe in OpenThreads::Condition::wait (
    this=this@entry=0x7f71b1db6cb0, mutex=mutex@entry=0x7f71b1db6c98)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/OpenThreads/pthreads/PThreadCondition.cpp:137
#2  0x00007f71c013d305 in OpenThreads::Block::block (this=0x7f71b1db6c98)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/OpenThreads/Block:42
#3  osgDB::DatabasePager::ReadQueue::block (this=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osgDB/DatabasePager:394
#4  osgDB::DatabasePager::DatabaseThread::run (this=0x7f71b1eaf260)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osgDB/DatabasePager.cpp:722
#5  0x00007f71beb618e1 in OpenThreads::ThreadPrivateActions::StartThread (
    data=0x7f71b1eaf278)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/OpenThreads/pthreads/PThread.cpp:206
#6  0x00007f71c08bf494 in start_thread (arg=0x7f71817fe700)
    at pthread_create.c:333
#7  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 14 (Thread 0x7f71a97ff700 (LWP 9225)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000556273da54df in SGWaitCondition::wait(SGMutex&) ()
#2  0x0000556273de06e3 in simgear::SGTerraSync::WorkerThread::runInternal() ()
#3  0x0000556273de14e7 in simgear::SGTerraSync::WorkerThread::run() ()
#4  0x0000556273da567a in SGThread::PrivateData::start_routine(void*) ()
#5  0x00007f71c08bf494 in start_thread (arg=0x7f71a97ff700)
    at pthread_create.c:333
#6  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 13 (Thread 0x7f71b0bfe700 (LWP 9221)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f71beb61beb in OpenThreads::Barrier::block (this=<optimized out>, 
    numThreads=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/OpenThreads/pthreads/PThreadBarrier.cpp:183
#2  0x00007f71bef1bcc5 in osg::OperationThread::run (this=0x7f71b33492e0)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/OperationThread.cpp:432
#3  0x00007f71beb618e1 in OpenThreads::ThreadPrivateActions::StartThread (
    data=0x7f71b33492f8)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/OpenThreads/pthreads/PThread.cpp:206
#4  0x00007f71c08bf494 in start_thread (arg=0x7f71b0bfe700)
    at pthread_create.c:333
#5  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 12 (Thread 0x7f71a6bff700 (LWP 9236)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000556273da54df in SGWaitCondition::wait(SGMutex&) ()
#2  0x00005562737f1a29 in NasalGCThread::run() ()
#3  0x0000556273da567a in SGThread::PrivateData::start_routine(void*) ()
#4  0x00007f71c08bf494 in start_thread (arg=0x7f71a6bff700)
    at pthread_create.c:333
#5  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 11 (Thread 0x7f71927fe700 (LWP 9231)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000556273da54df in SGWaitCondition::wait(SGMutex&) ()
#2  0x000055627392552b in FLITEVoiceSynthesizer::WorkerThread::run() ()
#3  0x0000556273da567a in SGThread::PrivateData::start_routine(void*) ()
#4  0x00007f71c08bf494 in start_thread (arg=0x7f71927fe700)
    at pthread_create.c:333
#5  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 10 (Thread 0x7f7193fff700 (LWP 9229)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000556273da54df in SGWaitCondition::wait(SGMutex&) ()
#2  0x000055627392552b in FLITEVoiceSynthesizer::WorkerThread::run() ()
#3  0x0000556273da567a in SGThread::PrivateData::start_routine(void*) ()
#4  0x00007f71c08bf494 in start_thread (arg=0x7f7193fff700)
    at pthread_create.c:333
#5  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 9 (Thread 0x7f71b2fff700 (LWP 9235)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000556273da54df in SGWaitCondition::wait(SGMutex&) ()
#2  0x0000556273ccb4db in logstream::LogStreamPrivate::run() ()
#3  0x0000556273da567a in SGThread::PrivateData::start_routine(void*) ()
#4  0x00007f71c08bf494 in start_thread (arg=0x7f71b2fff700)
    at pthread_create.c:333
#5  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 8 (Thread 0x7f7190ffe700 (LWP 9233)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f71beb61dfe in OpenThreads::Condition::wait (this=<optimized out>, 
    mutex=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/OpenThreads/pthreads/PThreadCondition.cpp:137
#2  0x000055627391dd20 in FGVoiceMgr::FGVoiceThread::run() ()
#3  0x00007f71beb618e1 in OpenThreads::ThreadPrivateActions::StartThread (
    data=0x7f71946bdb40)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/OpenThreads/pthreads/PThread.cpp:206
#4  0x00007f71c08bf494 in start_thread (arg=0x7f7190ffe700)
    at pthread_create.c:333
#5  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 7 (Thread 0x7f71917ff700 (LWP 9232)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000556273da54df in SGWaitCondition::wait(SGMutex&) ()
#2  0x000055627392552b in FLITEVoiceSynthesizer::WorkerThread::run() ()
#3  0x0000556273da567a in SGThread::PrivateData::start_routine(void*) ()
#4  0x00007f71c08bf494 in start_thread (arg=0x7f71917ff700)
    at pthread_create.c:333
#5  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 6 (Thread 0x7f7181fff700 (LWP 9240)):
#0  osg::BufferObject::removeBufferData (this=0x7f71696267e0, index=2690)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/BufferObject.cpp:1195
#1  0x00007f71bee5ecb2 in osg::BufferData::setBufferObject (
    this=this@entry=0x7f716913ad40, bufferObject=bufferObject@entry=0x0)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/BufferObject.cpp:1274
#2  0x00007f71bee5ed49 in osg::BufferData::~BufferData (this=0x7f716913ad40, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/BufferObject.cpp:1265
#3  0x00005562734185dc in osg::TemplateArray<osg::Vec3f, (osg::Array::Type)28, 3, 5126>::~TemplateArray() ()
#4  0x00007f71beeb22b7 in osg::Referenced::unref (this=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/Referenced:198
#5  osg::ref_ptr<osg::Array>::~ref_ptr (this=0x7f716bba2f78, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/ref_ptr:35
#6  osg::Geometry::~Geometry (this=0x7f716bba2e00, __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Geometry.cpp:79
#7  0x00007f71beeb2319 in osg::Geometry::~Geometry (this=0x7f716bba2e00, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Geometry.cpp:85
#8  0x00007f71beecfc85 in osg::Referenced::unref (this=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/Referenced:198
#9  osg::ref_ptr<osg::Node>::~ref_ptr (this=<optimized out>, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/ref_ptr:35
#10 std::_Destroy<osg::ref_ptr<osg::Node> > (__pointer=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:98
#11 std::_Destroy_aux<false>::__destroy<osg::ref_ptr<osg::Node>*> (
    __last=<optimized out>, __first=0x7f716203b1a8)
    at /usr/include/c++/7/bits/stl_construct.h:108
#12 std::_Destroy<osg::ref_ptr<osg::Node>*> (__last=<optimized out>, 
    __first=<optimized out>) at /usr/include/c++/7/bits/stl_construct.h:137
#13 std::_Destroy<osg::ref_ptr<osg::Node>*, osg::ref_ptr<osg::Node> > (
    __last=<optimized out>, __first=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:206
#14 std::vector<osg::ref_ptr<osg::Node>, std::allocator<osg::ref_ptr<osg::Node> > >::~vector (this=0x7f71620e46d0, __in_chrg=<optimized out>)
    at /usr/include/c++/7/bits/stl_vector.h:434
#15 osg::Group::~Group (this=0x7f71620e4600, __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Group.cpp:44
#16 0x0000556273eb72dd in simgear::EffectGeode::~EffectGeode() ()
#17 0x00007f71beecfc85 in osg::Referenced::unref (this=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/Referenced:198
#18 osg::ref_ptr<osg::Node>::~ref_ptr (this=<optimized out>, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/ref_ptr:35
#19 std::_Destroy<osg::ref_ptr<osg::Node> > (__pointer=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:98
#20 std::_Destroy_aux<false>::__destroy<osg::ref_ptr<osg::Node>*> (
    __last=<optimized out>, __first=0x7f716ba0ec08)
    at /usr/include/c++/7/bits/stl_construct.h:108
#21 std::_Destroy<osg::ref_ptr<osg::Node>*> (__last=<optimized out>, 
    __first=<optimized out>) at /usr/include/c++/7/bits/stl_construct.h:137
#22 std::_Destroy<osg::ref_ptr<osg::Node>*, osg::ref_ptr<osg::Node> > (
    __last=<optimized out>, __first=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:206
#23 std::vector<osg::ref_ptr<osg::Node>, std::allocator<osg::ref_ptr<osg::Node> > >::~vector (this=0x7f71620e4310, __in_chrg=<optimized out>)
    at /usr/include/c++/7/bits/stl_vector.h:434
#24 osg::Group::~Group (this=0x7f71620e4240, __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Group.cpp:44
#25 0x00007f71c04001fb in osg::LOD::~LOD (this=0x7f71620e4240, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/LOD:130
#26 osg::LOD::~LOD (this=0x7f71620e4240, __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/LOD:130
#27 0x00007f71beecfc85 in osg::Referenced::unref (this=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/Referenced:198
#28 osg::ref_ptr<osg::Node>::~ref_ptr (this=<optimized out>, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/ref_ptr:35
#29 std::_Destroy<osg::ref_ptr<osg::Node> > (__pointer=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:98
#30 std::_Destroy_aux<false>::__destroy<osg::ref_ptr<osg::Node>*> (
    __last=<optimized out>, __first=0x7f716c6181b0)
    at /usr/include/c++/7/bits/stl_construct.h:108
#31 std::_Destroy<osg::ref_ptr<osg::Node>*> (__last=<optimized out>, 
    __first=<optimized out>) at /usr/include/c++/7/bits/stl_construct.h:137
#32 std::_Destroy<osg::ref_ptr<osg::Node>*, osg::ref_ptr<osg::Node> > (
    __last=<optimized out>, __first=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:206
#33 std::vector<osg::ref_ptr<osg::Node>, std::allocator<osg::ref_ptr<osg::Node> > >::~vector (this=0x7f716217b6d0, __in_chrg=<optimized out>)
    at /usr/include/c++/7/bits/stl_vector.h:434
#34 osg::Group::~Group (this=0x7f716217b600, __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Group.cpp:44
#35 0x00007f71beecfcc9 in osg::Group::~Group (this=0x7f716217b600, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Group.cpp:54
#36 0x00007f71beecfc85 in osg::Referenced::unref (this=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/Referenced:198
#37 osg::ref_ptr<osg::Node>::~ref_ptr (this=<optimized out>, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/ref_ptr:35
#38 std::_Destroy<osg::ref_ptr<osg::Node> > (__pointer=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:98
#39 std::_Destroy_aux<false>::__destroy<osg::ref_ptr<osg::Node>*> (
    __last=<optimized out>, __first=0x7f7162030fa0)
    at /usr/include/c++/7/bits/stl_construct.h:108
#40 std::_Destroy<osg::ref_ptr<osg::Node>*> (__last=<optimized out>, 
    __first=<optimized out>) at /usr/include/c++/7/bits/stl_construct.h:137
#41 std::_Destroy<osg::ref_ptr<osg::Node>*, osg::ref_ptr<osg::Node> > (
    __last=<optimized out>, __first=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:206
#42 std::vector<osg::ref_ptr<osg::Node>, std::allocator<osg::ref_ptr<osg::Node> > >::~vector (this=0x7f71693826d0, __in_chrg=<optimized out>)
    at /usr/include/c++/7/bits/stl_vector.h:434
#43 osg::Group::~Group (this=0x7f7169382600, __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Group.cpp:44
#44 0x00007f71beecfcc9 in osg::Group::~Group (this=0x7f7169382600, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Group.cpp:54
#45 0x00007f71beecfc85 in osg::Referenced::unref (this=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/Referenced:198
#46 osg::ref_ptr<osg::Node>::~ref_ptr (this=<optimized out>, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/ref_ptr:35
#47 std::_Destroy<osg::ref_ptr<osg::Node> > (__pointer=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:98
#48 std::_Destroy_aux<false>::__destroy<osg::ref_ptr<osg::Node>*> (
    __last=<optimized out>, __first=0x7f71622e5a00)
    at /usr/include/c++/7/bits/stl_construct.h:108
#49 std::_Destroy<osg::ref_ptr<osg::Node>*> (__last=<optimized out>, 
    __first=<optimized out>) at /usr/include/c++/7/bits/stl_construct.h:137
#50 std::_Destroy<osg::ref_ptr<osg::Node>*, osg::ref_ptr<osg::Node> > (
    __last=<optimized out>, __first=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:206
#51 std::vector<osg::ref_ptr<osg::Node>, std::allocator<osg::ref_ptr<osg::Node> > >::~vector (this=0x7f7169038cd0, __in_chrg=<optimized out>)
    at /usr/include/c++/7/bits/stl_vector.h:434
#52 osg::Group::~Group (this=0x7f7169038c00, __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Group.cpp:44
#53 0x00007f71bef0e8e9 in osg::MatrixTransform::~MatrixTransform (
    this=0x7f7169038c00, __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/MatrixTransform.cpp:41
#54 0x00007f71beecfc85 in osg::Referenced::unref (this=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/Referenced:198
#55 osg::ref_ptr<osg::Node>::~ref_ptr (this=<optimized out>, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/ref_ptr:35
#56 std::_Destroy<osg::ref_ptr<osg::Node> > (__pointer=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:98
#57 std::_Destroy_aux<false>::__destroy<osg::ref_ptr<osg::Node>*> (
    __last=<optimized out>, __first=0x7f7162021be0)
    at /usr/include/c++/7/bits/stl_construct.h:108
#58 std::_Destroy<osg::ref_ptr<osg::Node>*> (__last=<optimized out>, 
    __first=<optimized out>) at /usr/include/c++/7/bits/stl_construct.h:137
#59 std::_Destroy<osg::ref_ptr<osg::Node>*, osg::ref_ptr<osg::Node> > (
    __last=<optimized out>, __first=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:206
#60 std::vector<osg::ref_ptr<osg::Node>, std::allocator<osg::ref_ptr<osg::Node> > >::~vector (this=0x7f716c5bb5d0, __in_chrg=<optimized out>)
    at /usr/include/c++/7/bits/stl_vector.h:434
#61 osg::Group::~Group (this=0x7f716c5bb500, __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Group.cpp:44
#62 0x00007f71c04001fb in osg::LOD::~LOD (this=0x7f716c5bb500, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/LOD:130
#63 osg::LOD::~LOD (this=0x7f716c5bb500, __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/LOD:130
#64 0x00007f71beecfc85 in osg::Referenced::unref (this=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/Referenced:198
#65 osg::ref_ptr<osg::Node>::~ref_ptr (this=<optimized out>, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/ref_ptr:35
#66 std::_Destroy<osg::ref_ptr<osg::Node> > (__pointer=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:98
#67 std::_Destroy_aux<false>::__destroy<osg::ref_ptr<osg::Node>*> (
    __last=<optimized out>, __first=0x7f716209a3f8)
    at /usr/include/c++/7/bits/stl_construct.h:108
#68 std::_Destroy<osg::ref_ptr<osg::Node>*> (__last=<optimized out>, 
    __first=<optimized out>) at /usr/include/c++/7/bits/stl_construct.h:137
#69 std::_Destroy<osg::ref_ptr<osg::Node>*, osg::ref_ptr<osg::Node> > (
    __last=<optimized out>, __first=<optimized out>)
    at /usr/include/c++/7/bits/stl_construct.h:206
#70 std::vector<osg::ref_ptr<osg::Node>, std::allocator<osg::ref_ptr<osg::Node> > >::~vector (this=0x7f71693833d0, __in_chrg=<optimized out>)
    at /usr/include/c++/7/bits/stl_vector.h:434
#71 osg::Group::~Group (this=0x7f7169383300, __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Group.cpp:44
#72 0x00007f71beecfcc9 in osg::Group::~Group (this=0x7f7169383300, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Group.cpp:54
#73 0x00007f71c014284a in osg::Referenced::unref (this=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/Referenced:198
#74 osg::ref_ptr<osg::Object>::~ref_ptr (this=<optimized out>, 
    __in_chrg=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/ref_ptr:35
#75 __gnu_cxx::new_allocator<std::_List_node<osg::ref_ptr<osg::Object> > >::destroy<osg::ref_ptr<osg::Object> > (this=<optimized out>, __p=<optimized out>)
    at /usr/include/c++/7/ext/new_allocator.h:140
#76 std::allocator_traits<std::allocator<std::_List_node<osg::ref_ptr<osg::Object> > > >::destroy<osg::ref_ptr<osg::Object> > (__a=..., __p=<optimized out>)
    at /usr/include/c++/7/bits/alloc_traits.h:487
#77 std::__cxx11::_List_base<osg::ref_ptr<osg::Object>, std::allocator<osg::ref_ptr<osg::Object> > >::_M_clear (this=this@entry=0x7f7181ffea30)
    at /usr/include/c++/7/bits/list.tcc:76
#78 0x00007f71c013d3c5 in std::__cxx11::_List_base<osg::ref_ptr<osg::Object>, std::allocator<osg::ref_ptr<osg::Object> > >::~_List_base (this=0x7f7181ffea30, 
    __in_chrg=<optimized out>) at /usr/include/c++/7/bits/stl_list.h:442
#79 std::__cxx11::list<osg::ref_ptr<osg::Object>, std::allocator<osg::ref_ptr<osg::Object> > >::~list (this=0x7f7181ffea30, __in_chrg=<optimized out>)
    at /usr/include/c++/7/bits/stl_list.h:733
#80 osgDB::DatabasePager::DatabaseThread::run (this=0x7f71b1eaf200)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osgDB/DatabasePager.cpp:740
#81 0x00007f71beb618e1 in OpenThreads::ThreadPrivateActions::StartThread (
    data=0x7f71b1eaf218)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/OpenThreads/pthreads/PThread.cpp:206
#82 0x00007f71c08bf494 in start_thread (arg=0x7f7181fff700)
    at pthread_create.c:333
#83 0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 5 (Thread 0x7f7192fff700 (LWP 9230)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000556273da54df in SGWaitCondition::wait(SGMutex&) ()
#2  0x000055627392552b in FLITEVoiceSynthesizer::WorkerThread::run() ()
#3  0x0000556273da567a in SGThread::PrivateData::start_routine(void*) ()
#4  0x00007f71c08bf494 in start_thread (arg=0x7f7192fff700)
    at pthread_create.c:333
#5  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 4 (Thread 0x7f71b03fd700 (LWP 9222)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f71beb61beb in OpenThreads::Barrier::block (this=<optimized out>, 
    numThreads=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/OpenThreads/pthreads/PThreadBarrier.cpp:183
#2  0x00007f71bef1bcc5 in osg::OperationThread::run (this=0x7f71b33493c0)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/OperationThread.cpp:432
#3  0x00007f71beb618e1 in OpenThreads::ThreadPrivateActions::StartThread (
    data=0x7f71b33493d8)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/OpenThreads/pthreads/PThread.cpp:206
#4  0x00007f71c08bf494 in start_thread (arg=0x7f71b03fd700)
    at pthread_create.c:333
#5  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 3 (Thread 0x7f7195fff700 (LWP 9228)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x0000556273da54df in SGWaitCondition::wait(SGMutex&) ()
#2  0x0000556273ce13af in (anonymous namespace)::Resolver::run() ()
#3  0x0000556273da567a in SGThread::PrivateData::start_routine(void*) ()
#4  0x00007f71c08bf494 in start_thread (arg=0x7f7195fff700)
    at pthread_create.c:333
#5  0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 2 (Thread 0x7f71c1d3f980 (LWP 9213)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
    at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f71beb61dfe in OpenThreads::Condition::wait (
    this=this@entry=0x7f71b1ffd770, mutex=mutex@entry=0x7f71b1ffd758)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/OpenThreads/pthreads/PThreadCondition.cpp:137
#2  0x00007f71bf5a45e9 in OpenThreads::BlockCount::block (this=0x7f71b1ffd758)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/OpenThreads/Block:133
#3  osgViewer::ViewerBase::renderingTraversals (this=0x7f71b30aae80)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osgViewer/ViewerBase.cpp:868
#4  0x0000556273abeeb6 in fgOSMainLoop() ()
#5  0x00005562732bbce7 in fgMainInit(int, char**) ()
#6  0x000055627325918f in main ()

Thread 1 (Thread 0x7f71afbfc700 (LWP 9223)):
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1  0x00007f71bc05942a in __GI_abort () at abort.c:89
#2  0x000055627326a12d in fg_terminate() ()
#3  0x00007f71bc96c956 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#4  0x00007f71bc96c9a1 in std::terminate() ()
   from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#5  0x00007f71bc96d6ff in __cxa_pure_virtual ()
   from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#6  0x00007f71bee5f8f6 in osg::GLBufferObject::compileBuffer (
    this=this@entry=0x7f71aec33180)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/BufferObject.cpp:163
#7  0x00007f71beeb0642 in osg::State::bindVertexBufferObject (
    vbo=0x7f71aec33180, this=0x7f71b1dc8a00)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/State:514
#8  osg::State::setVertexPointer (array=0x7f7168842ac0, this=0x7f71b1dc8a00)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/State:665
#9  osg::Geometry::drawVertexArraysImplementation (
    this=this@entry=0x7f716886c200, renderInfo=...)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Geometry.cpp:789
#10 0x00007f71beeb0fb6 in osg::Geometry::drawImplementation (
    this=0x7f716886c200, renderInfo=...)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/Geometry.cpp:741
#11 0x00007f71bf9545f8 in osg::Drawable::draw (renderInfo=..., 
    this=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/include/osg/Drawable:584
#12 osgUtil::RenderLeaf::render (this=0x7f71ae050470, renderInfo=..., 
    previous=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osgUtil/RenderLeaf.cpp:81
#13 0x00007f71bf94f0a5 in osgUtil::RenderBin::drawImplementation (
    this=this@entry=0x7f71b30b4200, renderInfo=..., 
    previous=@0x7f71afbfba88: 0x7f71ae0fe6f0)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osgUtil/RenderBin.cpp:487
#14 0x00007f71bf959bd2 in osgUtil::RenderStage::drawImplementation (
    this=0x7f71b30b4200, renderInfo=..., 
    previous=@0x7f71afbfba88: 0x7f71ae0fe6f0)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osgUtil/RenderStage.cpp:1408
#15 0x00007f71bf94fb0b in osgUtil::RenderBin::draw (
    this=this@entry=0x7f71b30b4200, renderInfo=..., 
    previous=@0x7f71afbfba88: 0x7f71ae0fe6f0)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osgUtil/RenderBin.cpp:430
#16 0x00007f71bf958fa4 in osgUtil::RenderStage::drawInner (
    this=0x7f71b30b4200, renderInfo=..., 
    previous=@0x7f71afbfba88: 0x7f71ae0fe6f0, 
    doCopyTexture=@0x7f71afbfb9c7: false)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osgUtil/RenderStage.cpp:937
#17 0x00007f71bf95a419 in osgUtil::RenderStage::draw (this=0x7f71b30b4200, 
    renderInfo=..., previous=@0x7f71afbfba88: 0x7f71ae0fe6f0)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osgUtil/RenderStage.cpp:1249
#18 0x00007f71bf962cd6 in osgUtil::SceneView::draw (this=0x7f71b1eba200)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osgUtil/SceneView.cpp:1366
#19 0x00007f71bf5740df in osgViewer::Renderer::draw (this=<optimized out>)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osgViewer/Renderer.cpp:764
#20 0x00007f71beecc8c9 in osg::GraphicsContext::runOperations (
    this=0x7f71b30ab3c0)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/GraphicsContext.cpp:773
#21 0x00007f71bef1bcc5 in osg::OperationThread::run (
    this=this@entry=0x7f71b3349120)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/OperationThread.cpp:432
#22 0x00007f71beece548 in osg::GraphicsThread::run (this=0x7f71b3349120)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/osg/GraphicsThread.cpp:38
#23 0x00007f71beb618e1 in OpenThreads::ThreadPrivateActions::StartThread (
    data=0x7f71b3349138)
    at /home/anders/FlightGear/build/OSG/jmt-osg.git/src/OpenThreads/pthreads/PThread.cpp:206
#24 0x00007f71c08bf494 in start_thread (arg=0x7f71afbfc700)
    at pthread_create.c:333
#25 0x00007f71bc10dabf in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97
(gdb) q