crash on linux during threaded loading

[varnholt]

Looks like lua needs to chill until level loading thread is done

(gdb) bt
#0 __lll_lock_wait () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1 0x00007ffff6a8ae42 in __GI___pthread_mutex_lock (mutex=0x794650) at ../nptl/pthread_mutex_lock.c:115
#2 0x00007ffff6eb41bc in sf::priv::GlContext::acquireTransientContext() () from ./libsfml-window.so.2.5
#3 0x00007ffff7118a9b in sf::Texture::bind(sf::Texture const*, sf::Texture::CoordinateType) () from ./libsfml-graphics.so.2.5
#4 0x00007ffff7111ff9 in sf::RenderTarget::applyTexture(sf::Texture const*) () from ./libsfml-graphics.so.2.5
#5 0x00007ffff7112092 in sf::RenderTarget::clear(sf::Color const&) () from ./libsfml-graphics.so.2.5
#6 0x000000000043add6 in Game::draw() ()
#7 0x000000000043c9c8 in Game::loop() ()
#8 0x0000000000418fca in main ()
[Current thread is 1 (Thread 0x7ffff7f09900 (LWP 29427))]
(gdb) thread 2
[Switching to thread 2 (Thread 0x7fffed27a700 (LWP 29428))]
#0 0x00007ffff5152a90 in _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
(gdb) bt
#0 0x00007ffff5152a90 in _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#1 0x00007ffff75d4348 in ?? () from /usr/lib/nvidia-390/libGL.so.1
#2 0x00007ffff75d5145 in ?? () from /usr/lib/nvidia-390/libGL.so.1
#3 0x00007ffff6ec4a94 in sf::priv::GlxContext::makeCurrent(bool) () from ./libsfml-window.so.2.5
#4 0x00007ffff6eb40e1 in sf::priv::GlContext::setActive(bool) () from ./libsfml-window.so.2.5
#5 0x00007ffff6eb42ad in sf::priv::GlContext::acquireTransientContext() () from ./libsfml-window.so.2.5
#6 0x00007ffff711790d in sf::Texture::~Texture() () from ./libsfml-graphics.so.2.5
#7 0x00000000004b4115 in Layer::~Layer() ()
#8 0x00000000004c2ae5 in MenuScreenPause::~MenuScreenPause() ()
#9 0x00000000004a6f70 in std::_Sp_counted_ptr_inplace<Menu, std::allocator

, (__gnu_cxx::_Lock_policy)2>::_M_dispose() ()
#10 0x00000000004a6a5f in std::shared_ptr::~shared_ptr() ()
#11 0x00007ffff5decff8 in __run_exit_handlers (status=1, listp=0x7ffff61775f8 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true) at exit.c:82
#12 0x00007ffff5ded045 in __GI_exit (status=) at exit.c:104
#13 0x00007ffff5154bb8 in _XDefaultError () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#14 0x00007ffff5154ced in _XError () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#15 0x00007ffff5151b77 in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#16 0x00007ffff5151c35 in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#17 0x00007ffff5152bf0 in _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#18 0x00007ffff75d4348 in ?? () from /usr/lib/nvidia-390/libGL.so.1
#19 0x00007ffff75d5145 in ?? () from /usr/lib/nvidia-390/libGL.so.1
#20 0x00007ffff6ec4a94 in sf::priv::GlxContext::makeCurrent(bool) () from ./libsfml-window.so.2.5
#21 0x00007ffff6eb40e1 in sf::priv::GlContext::setActive(bool) () from ./libsfml-window.so.2.5
#22 0x00007ffff6eb42ad in sf::priv::GlContext::acquireTransientContext() () from ./libsfml-window.so.2.5
#23 0x00007ffff7117ce9 in sf::Texture::update(unsigned char const*, unsigned int, unsigned int, unsigned int, unsigned int) ()
from ./libsfml-graphics.so.2.5
#24 0x00007ffff711989c in sf::Texture::loadFromImage(sf::Image const&, sf::Rect const&) () from ./libsfml-graphics.so.2.5
#25 0x00007ffff711993d in sf::Texture::loadFromFile(std::__cxx11::basic_string<char, std::char_traits, std::allocator > const&, sf::Rect const&) () from ./libsfml-graphics.so.2.5
#26 0x000000000047a5e7 in LuaNode::setupTexture() ()
#27 0x000000000047b09f in updateProperties ()
#28 0x00007ffff7bac090 in luaD_precall (L=L@entry=0x7fffebdea618, func=, func@entry=0x7fffc92eed10, nresults=nresults@entry=0) at ldo.c:337
#29 0x00007ffff7bb8efd in luaV_execute (L=L@entry=0x7fffebdea618) at lvm.c:1084
#30 0x00007ffff7bac457 in luaD_call (L=0x7fffebdea618, func=, nResults=, allowyield=) at ldo.c:422
#31 0x00007ffff7bab9f2 in luaD_rawrunprotected (L=L@entry=0x7fffebdea618, f=f@entry=0x7ffff7ba6b80 <f_call>, ud=ud@entry=0x7fffed2799d0) at ldo.c:142
#32 0x00007ffff7bac73d in luaD_pcall (L=L@entry=0x7fffebdea618, func=func@entry=0x7ffff7ba6b80 <f_call>, u=u@entry=0x7fffed2799d0, old_top=16,
ef=) at ldo.c:644
#33 0x00007ffff7ba8081 in lua_pcallk (L=0x7fffebdea618, nargs=0, nresults=0, errfunc=, ctx=0, k=0x0) at lapi.c:945
#34 0x0000000000478c39 in LuaNode::luaRetrieveProperties() ()
#35 0x0000000000479070 in LuaNode::setupLua() ()
#36 0x000000000047a169 in LuaNode::initialize() ()
#37 0x000000000044afbd in Level::spawnEnemies() ()
#38 0x0000000000451f6b in Level::initialize() ()
#39 0x000000000043d78f in std::_Function_handler<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> (), std::__f--Type for more, q to quit, c to continue without paging--
uture_base::_Task_setter<std::unique_ptr<std::__future_base::_Result, std::__future_base::_Result_base::_Deleter>, std::thread::_Invoker<std::tupleGame::loadLevel()::{lambda()#1} >, void> >::_M_invoke(std::_Any_data const&) ()
#40 0x000000000043e989 in std::__future_base::_State_baseV2::_M_do_set(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>, bool) ()
#41 0x00007ffff6a8fa99 in __pthread_once_slow (once_control=0xa20558, init_routine=0x7ffff676d3b0 <__once_proxy>) at pthread_once.c:116
#42 0x000000000043cc0e in std::thread::_State_impl<std::thread::_Invoker<std::tuple<std::__future_base::_Async_state_impl<std::thread::_Invoker<std::tupleGame::loadLevel()::{lambda()#1} >, void>::_Async_state_impl(std::tupleGame::loadLevel()::{lambda()#1}&&)::{lambda()#1}> > >::_M_run() ()
#43 0x00007ffff676e1a0 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#44 0x00007ffff6a886ba in start_thread (arg=0x7fffed27a700) at pthread_create.c:333
#45 0x00007ffff5eba41d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109