Bug Report

When using builtin tuple to create a type alias, mypy reports an error.

To Reproduce

t = tuple[str, ...]

Expected Behavior

No error.

Actual Behavior

$ mypy <(echo 't = tuple[str, ...]')
/dev/fd/63:1: error: Unexpected '...'  [misc]
    t = tuple[str, ...]
    ^
Found 1 error in 1 file (checked 1 source file)

Your Environment

• Mypy version used: 0.800

• Mypy command-line flags:

• Mypy configuration options from mypy.ini (and other config files):

  [mypy]
  python_version = 3.9
  show_error_codes = True
  pretty = True
  files = .
  
  ignore_missing_imports = False
  no_implicit_reexport = True
  no_implicit_optional = True
  strict_equality = True
  strict_optional = True
  check_untyped_defs = True
  disallow_incomplete_defs = True
  disallow_untyped_defs = True
  disallow_untyped_calls = True
  disallow_untyped_decorators = True
  disallow_subclassing_any = True
  
  warn_unused_configs = True
  warn_redundant_casts = True
  warn_unused_ignores = True
  warn_return_any = True
  warn_unreachable = True
  

• Python version used: 3.9.0

• Operating system and version: Macos 11.1