In importlib a verbose message can be formatted twice, the first time before passing it to _verbose_message(), and the second time in _verbose_message(), Example:

$ python -v
...
>>> open('{0}.pyc', 'wb').close()
>>> __import__('{0}')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<frozen importlib._bootstrap>", line 969, in _find_and_load
  File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 658, in exec_module
  File "<frozen importlib._bootstrap_external>", line 869, in get_code
  File "<frozen importlib._bootstrap_external>", line 440, in _validate_bytecode_header
  File "<frozen importlib._bootstrap_external>", line 368, in _verbose_message
IndexError: tuple index out of range

Proposed patch fixes the issue.