What do you mean by trace ? It just crash without saying anything.
xCode crash log seems to give some clues :
Application Specific Information:
Sending buttonPressed: to <NSAlert: 0x7f8f02f96560> from <NSButton: 0x7f8efbed7ea0>
ProductBuildVersion: 10E1001
UNCAUGHT EXCEPTION (NSInvalidArgumentException): *** -[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from objects[1]
UserInfo: (null)
Hints:
Backtrace:
0 __exceptionPreprocess (in CoreFoundation)
1 DVTFailureHintExceptionPreprocessor (in DVTFoundation)
2 objc_exception_throw (in libobjc.A.dylib)
3 -[CFPrefsConfigurationFileSource initWithConfigurationPropertyList:containingPreferences:] (in CoreFoundation)
4 -[__NSPlaceholderDictionary initWithObjects:forKeys:count:] (in CoreFoundation)
5 +[NSDictionary dictionaryWithObjects:forKeys:count:] (in CoreFoundation)
6 -[LOCXclocExportRequest _generateContentsJSON] (in Localization)
7 -[LOCXclocExportRequest _copyingSourceFilesWithError:] (in Localization)
8 __25-[LOCExportRequest start]_block_invoke_2 (in Localization)
9 __NSBLOCKOPERATION_IS_CALLING_OUT_TO_A_BLOCK__ (in Foundation)
10 -[NSBlockOperation main] (in Foundation)
11 -[__NSOperationInternal _start:] (in Foundation)
12 __NSOQSchedule_f (in Foundation)
13 _dispatch_call_block_and_release (in libdispatch.dylib)
14 _dispatch_client_callout (in libdispatch.dylib)
15 _dispatch_continuation_pop (in libdispatch.dylib)
16 _dispatch_async_redirect_invoke (in libdispatch.dylib)
17 _dispatch_root_queue_drain (in libdispatch.dylib)
18 _dispatch_worker_thread2 (in libdispatch.dylib)
19 _pthread_wqthread (in libsystem_pthread.dylib)
20 start_wqthread (in libsystem_pthread.dylib)