Launcher crash without existing config files in OpenMW 0.18 rc

backtrace

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x96997a6a __pthread_kill + 10
1   libsystem_c.dylib             	0x905abacf pthread_kill + 101
2   libsystem_c.dylib             	0x905e24f8 abort + 168
3   libc++abi.dylib               	0x9847180c abort_message + 151
4   libc++abi.dylib               	0x9846f275 default_terminate() + 34
5   libc++abi.dylib               	0x9846f2b5 safe_handler_caller(void (*)()) + 13
6   libc++abi.dylib               	0x9846f31d std::terminate() + 23
7   libc++abi.dylib               	0x9847049e __cxa_rethrow + 83
8   omwlauncher                   	0x0005cbb9 boost::program_options::store(boost::program_options::basic_parsed_options<char> const&, boost::program_options::variables_map&, bool) + 617 (variables_map.cpp:79)
9   omwlauncher                   	0x00077c13 Files::ConfigurationManager::loadConfig(boost::filesystem3::path const&, boost::program_options::variables_map&, boost::program_options::options_description&) + 579
10  omwlauncher                   	0x00077984 Files::ConfigurationManager::readConfiguration(boost::program_options::variables_map&, boost::program_options::options_description&) + 132
11  omwlauncher                   	0x000085e7 DataFilesPage::setupDataFiles() + 1047
12  omwlauncher                   	0x00036b19 MainDialog::setup() + 2297
13  omwlauncher                   	0x00033bc2 main + 818
14  omwlauncher                   	0x00002e75 start + 53