clang_createTranslationUnitFromSourceFile crashed

Hi dear all,
I'm writing a test program to try the index API, but failed with a
crash, following is the crash report:
libclang: crash detected during parsing: {
  'source_filename' : 'test2.c'
  'command_line_args' : ['-c'],
  'unsaved_files' : [('', '...', 1245120)],
  'options' : 1,
}
Could someone help me with this ? Many thanks !