Wesnoth crash on iPad

preprocessor.cpp

preprocessor_data::preprocessor_data(preprocessor_streambuf& t,
		filesystem::scoped_istream i,
		const std::string& history,
		const std::string& name,
		int linenum,
		const std::string& directory,
		const std::string& domain,
		std::unique_ptr<std::map<std::string, std::string>> defines,
		bool is_define)
	: preprocessor(t)
	, in_scope_(std::move(i))
	, in_(*in_scope_)
	, directory_(directory)
	, strings_()
	, local_defines_(std::move(defines))
	, tokens_()
	, slowpath_(0)
	, skipping_(0)
	, linenum_(linenum)
	, is_define_(is_define) // The crash (line 816) is here, at the end of initializers (maybe in std::move(defines)?)
{

stack_trace.txt

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x000000000282bc68
VM Region Info: 0x282bc68 is not in any region.  Bytes before following region: 4255712152
      REGION TYPE                      START - END             [ VSIZE] PRT/MAX SHRMOD  REGION DETAIL
      UNUSED SPACE AT START
--->  
      __TEXT                 00000001002bc000-0000000100da0000 [ 10.9M] r-x/r-x SM=COW  ...rwesnoth-iPad

Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [2711]
Triggered by Thread:  7

0   battleforwesnoth-iPad         	0x00000001003c4928 std::__1::pair<std::__1::__tree_iterator<std::__1::__value_type<std::__1::basic_string<char, std:... + 96 (string:1406)
1   battleforwesnoth-iPad         	0x0000000100ac3620 preprocessor_data::preprocessor_data(preprocessor_streambuf&, std::__1::unique_ptr<std::__1::basi... + 540 (map:1431)
2   battleforwesnoth-iPad         	0x0000000100ac3268 void preprocessor_streambuf::add_preprocessor<preprocessor_data, std::__1::unique_ptr<std::__1::b... + 240 (preprocessor.cpp:816)
3   battleforwesnoth-iPad         	0x0000000100ac3074 preprocessor_file::init() + 344 (preprocessor.cpp:789)
4   battleforwesnoth-iPad         	0x0000000100acc864 preprocessor_file::get_chunk() + 200 (preprocessor.cpp:588)
5   battleforwesnoth-iPad         	0x0000000100ac13d4 preprocessor_streambuf::underflow() + 428 (preprocessor.cpp:417)
6   battleforwesnoth-iPad         	0x000000010038530c tokenizer::next_token() + 2128 (streambuf:196)
7   battleforwesnoth-iPad         	0x00000001003de214 (anonymous namespace)::parser::operator()() + 2404 (parser.cpp:323)
8   battleforwesnoth-iPad         	0x00000001003dd860 read(config&, std::__1::basic_istream<char, std::__1::char_traits<char> >&, abstract_validator*) + 96 (parser.cpp:614)
9   battleforwesnoth-iPad         	0x00000001008b6a0c game_config::config_cache::read_cache(std::__1::basic_string<char, std::__1::char_traits<char>, s... + 4812 (config_cache.cpp:151)
10  battleforwesnoth-iPad         	0x00000001008b4fc8 game_config::config_cache::load_configs(std::__1::basic_string<char, std::__1::char_traits<char>,... + 68 (config_cache.cpp:297)
11  battleforwesnoth-iPad         	0x00000001003d4ab0 game_config_manager::load_game_config(game_config_manager::FORCE_RELOAD_CONFIG, game_classificati... + 1856 (game_config_manager.cpp:263)
12  battleforwesnoth-iPad         	0x00000001003d4214 game_config_manager::load_game_config_with_loadscreen(game_config_manager::FORCE_RELOAD_CONFIG, g... + 820 (game_config_manager.cpp:139)
13  battleforwesnoth-iPad         	0x00000001003d3af4 game_config_manager::init_game_config(game_config_manager::FORCE_RELOAD_CONFIG) + 568 (game_config_manager.cpp:90)
14  battleforwesnoth-iPad         	0x00000001008d7460 std::__1::__function::__func<do_gameloop(std::__1::vector<std::__1::basic_string<char, std::__1::... + 36 (wesnoth.cpp:702)
15  battleforwesnoth-iPad         	0x0000000100904b70 boost::detail::thread_data<gui2::dialogs::loading_screen::pre_show(gui2::window&)::$_0>::run() + 48 (functional:1913)
16  battleforwesnoth-iPad         	0x0000000100e11f10 boost::(anonymous namespace)::thread_proxy(void*) + 80 (thread.cpp:167)
17  libsystem_pthread.dylib       	0x00000001912a3d8c _pthread_start + 156 (pthread.c:896)
18  libsystem_pthread.dylib       	0x00000001912a776c thread_start + 8