python3 buildscripts/resmoke.py list-tags
Traceback (most recent call last):
  File "/Users/emptysquare/co/mongo/buildscripts/resmoke.py", line 14, in <module>
    cli.main(sys.argv)
  File "/Users/emptysquare/co/mongo/buildscripts/resmokelib/cli.py", line 21, in main
    subcommand.execute()
  File "/Users/emptysquare/co/mongo/buildscripts/resmokelib/run/__init__.py", line 125, in execute
    self.list_tags()
  File "/Users/emptysquare/co/mongo/buildscripts/resmokelib/run/__init__.py", line 162, in list_tags
    for suite_name, suite_file in get_suite_files():
  File "/Users/emptysquare/co/mongo/buildscripts/resmokelib/suitesconfig.py", line 42, in get_suite_files
    return ExplicitSuiteConfig.get_suite_files() + MatrixSuiteConfig.get_suite_files()
TypeError: unsupported operand type(s) for +: 'dict' and 'dict'