[('BUILD.gn',
  'error_1',
  'subpackage1/dummy_subpackage1.cc',
  'subpackage1'),
 ('BUILD.gn',
  'error_1',
  'subpackage1/dummy_subpackage1.h',
  'subpackage1'),
 ('BUILD.gn',
  'error_2',
  'subpackage1/dummy_subpackage2.cc',
  'subpackage1'),
 ('BUILD.gn',
  'error_2',
  'subpackage1/dummy_subpackage2.h',
  'subpackage1')]