#0  VMAP::MapTree::unloadMap (this=0x23fc240, dirFileName=@0x42002c90,
    pMapTileIdent=<value optimized out>, pForce=<value optimized out>)
    at vmap/AABSPTree.h:721
#1  0x00000000006f8f78 in VMAP::VMapManager::_unloadMap (
    this=<value optimized out>, pMapId=0, x=8192, y=48)
    at vmap/VMapManager.cpp:335
#2  0x00000000006f9048 in VMAP::VMapManager::unloadMap (this=0x2aaaaab30030,
    pMapId=1, x=2, y=10922) at vmap/VMapManager.cpp:311
#3  0x000000000051e4f1 in Map::UnloadGrid (this=0x2aaab0e5be40,
    x=<value optimized out>, y=@0x42002e68) at Map.cpp:1164
#4  0x00000000006aa37e in RemovalState::Update (this=<value optimized out>,
    m=@0x2aaab0e5be40, info=@0x2aaa, x=@0x42002e6c, y=@0x42002e68,
    t_diff=@0x42002eb8) at GridStates.cpp:66
#5  0x000000000051a379 in Map::Update (this=0x2aaab0e5be40, t_diff=@0x42002eb8)
    at Map.cpp:822
#6  0x0000000000539cab in MapManager::Update (this=0x2aaab0d50ee0,
    diff=<value optimized out>) at MapManager.cpp:125
#7  0x0000000000652d76 in World::Update (this=0xa4d850, diff=100)
    at World.cpp:952
#8  0x00000000004bd834 in WorldRunnable::run (this=<value optimized out>)
    at WorldRunnable.cpp:61
#9  0x00002ab28a204611 in ZThread::ThreadImpl::dispatch (parent=0xa29cc0,
    impl=0x2aaab0d51b20, task=@0x42003100) at ThreadImpl.cxx:407
#10 0x00002ab28a206af6 in ZThread::(anonymous namespace)::Launcher::run (
    this=0x7fff215f91a0) at ThreadImpl.cxx:49
#11 0x00002ab28a20a41e in _dispatch (arg=0x2aaaaab30030)
    at posix/ThreadOps.cxx:137
#12 0x00002ab28a31d135 in start_thread () from /lib/libpthread.so.0
#13 0x00002ab28a9512ce in clone () from /lib/libc.so.6
#14 0x0000000000000000 in ?? ()