#0  std::__cxx11::_List_base<AuraEffect*, std::allocator<AuraEffect*> >::_M_clear (this=0x7f6e006c6f68)
    at /usr/include/c++/6/bits/list.tcc:73
73                __cur = __tmp->_M_next;
[Current thread is 1 (Thread 0x7f7098bff700 (LWP 21729))]
(gdb) bt full
#0  std::__cxx11::_List_base<AuraEffect*, std::allocator<AuraEffect*> >::_M_clear (this=0x7f6e006c6f68)
    at /usr/include/c++/6/bits/list.tcc:73
        __tmp = 0x0
        __cur = 0x0
#1  std::__cxx11::_List_base<AuraEffect*, std::allocator<AuraEffect*> >::~_List_base (this=0x7f6e006c6f68,
    __in_chrg=<optimized out>) at /usr/include/c++/6/bits/stl_list.h:442
No locals.
#2  std::__cxx11::list<AuraEffect*, std::allocator<AuraEffect*> >::~list (this=0x7f6e006c6f68,
    __in_chrg=<optimized out>) at /usr/include/c++/6/bits/stl_list.h:503
No locals.
#3  Unit::~Unit (this=0x7f6e006c6000, __in_chrg=<optimized out>)
    at /server/wow/source/horizon/src/server/game/Entities/Unit/Unit.cpp:329
No locals.
#4  0x000055f23c7ea05f in Creature::~Creature (this=0x7f6e006c6000, __in_chrg=<optimized out>)
    at /server/wow/source/horizon/src/server/game/Entities/Creature/Creature.cpp:175
No locals.
#5  Creature::~Creature (this=0x7f6e006c6000, __in_chrg=<optimized out>)
    at /server/wow/source/horizon/src/server/game/Entities/Creature/Creature.cpp:182
No locals.
#6  0x000055f23cd37f41 in ObjectGridUnloader::Visit<Creature> (this=this@entry=0x7f7098bfed60, m=...)
    at /server/wow/source/horizon/src/server/game/Grids/ObjectGridLoader.cpp:229
No locals.
#7  0x000055f23cb218cb in VisitorHelper<ObjectGridUnloader, Creature> (c=..., v=...)
    at /server/wow/source/horizon/src/server/shared/Dynamic/TypeContainerVisitor.h:61
No locals.
#8  VisitorHelper<ObjectGridUnloader, Creature, TypeList<GameObject, TypeList<DynamicObject, TypeList<Corpse, TypeList<AreaTrigger, TypeNull> > > > > (c=..., v=...)
    at /server/wow/source/horizon/src/server/shared/Dynamic/TypeContainerVisitor.h:67
No locals.
#9  VisitorHelper<ObjectGridUnloader, TypeList<Creature, TypeList<GameObject, TypeList<DynamicObject, TypeList<Corpse, TypeList<AreaTrigger, TypeNull> > > > > > (c=..., v=...)
    at /server/wow/source/horizon/src/server/shared/Dynamic/TypeContainerVisitor.h:89
No locals.
#10 TypeContainerVisitor<ObjectGridUnloader, TypeMapContainer<TypeList<Creature, TypeList<GameObject, TypeList<DynamicObject, TypeList<Corpse, TypeList<AreaTrigger, TypeNull> > > > > > >::Visit (c=..., this=<synthetic pointer>)
    at /server/wow/source/horizon/src/server/shared/Dynamic/TypeContainerVisitor.h:100
No locals.
#11 Grid<Player, TypeList<Player, TypeList<Creature, TypeList<Corpse, TypeList<DynamicObject, TypeNull> > > >, TypeList<Creature, TypeList<GameObject, TypeList<DynamicObject, TypeList<Corpse, TypeList<AreaTrigger, TypeNull> > > > > >::Visit---Type <return> to continue, or q <return> to quit---
<ObjectGridUnloader> (visitor=<synthetic pointer>..., this=0x7f6d82b02318)
    at /server/wow/source/horizon/src/server/game/Grids/Grid.h:92
No locals.
#12 NGrid<8u, Player, TypeList<Player, TypeList<Creature, TypeList<Corpse, TypeList<DynamicObject, TypeNull> > > >, TypeList<Creature, TypeList<GameObject, TypeList<DynamicObject, TypeList<Corpse, TypeList<AreaTrigger, TypeNull> > > > > >::VisitAllGrids<ObjectGridUnloader, TypeList<Creature, TypeList<GameObject, TypeList<DynamicObject, TypeList<Corpse, TypeList<AreaTrigger, TypeNull> > > > > > (visitor=..., this=<optimized out>)
    at /server/wow/source/horizon/src/server/game/Grids/NGrid.h:151
        y = <optimized out>
#13 Map::UnloadGrid (unloadAll=true, ngrid=..., this=0x7f6d713b0000)
    at /server/wow/source/horizon/src/server/game/Maps/Map.cpp:1600
        worker = {<No data fields>}
        visitor = <optimized out>
        y = <optimized out>
        gy = <optimized out>
        x = <optimized out>
        gx = <optimized out>
#14 Map::UnloadAll (this=<optimized out>) at /server/wow/source/horizon/src/server/game/Maps/Map.cpp:1660
        i = {_Ptr = 0x7f6d72fef020}
#15 0x000055f23cdb8d72 in MapInstanced::DestroyInstance (itr=<synthetic pointer>..., this=0x7f6f1532e000)
    at /server/wow/source/horizon/src/server/game/Maps/MapInstanced.cpp:266
No locals.
#16 MapInstanced::Update (this=0x7f6f1532e000, t=81)
    at /server/wow/source/horizon/src/server/game/Maps/MapInstanced.cpp:62
        i = <optimized out>
#17 0x000055f23cb2d6d3 in MapUpdateRequest::call (this=0x7f6e95d7b4f0)
    at /server/wow/source/horizon/src/server/game/Maps/MapUpdater.cpp:77
No locals.
#18 0x000055f23cde9df7 in DelayExecutor::svc (this=0x7f714dbbba68)
    at /server/wow/source/horizon/src/server/shared/Threading/DelayExecutor.cpp:69
        rq = 0x7f6e95d7b4f0
#19 0x00007f715746ff6d in ACE_Task_Base::svc_run(void*) () from /usr/lib/libACE-6.3.3.so
No symbol table info available.
#20 0x00007f7157470e86 in ACE_Thread_Adapter::invoke_i() () from /usr/lib/libACE-6.3.3.so
No symbol table info available.
#21 0x00007f7157470da9 in ACE_Thread_Adapter::invoke() () from /usr/lib/libACE-6.3.3.so
No symbol table info available.
#22 0x00007f715712b494 in start_thread (arg=0x7f7098bff700) at pthread_create.c:333
        __res = <optimized out>
---Type <return> to continue, or q <return> to quit---
        pd = 0x7f7098bff700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140121575782144, 1659993049191617911, 0, 140732485229023, 0,
                140124784029760, -1591939327247575689, -1590944090267773577}, mask_was_saved = 0}}, priv = {pad = {
              0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#23 0x00007f71556e7aff in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97
No locals.
(gdb)