TypeError from sorting incompatible types isn't flagged

I was surprised that some code like this wasn't flagged by mypy:

[1, None].sort()

• What is the actual behavior/output?
  No error.

• What is the behavior/output you expect?
  I would expect a similar warning as I get if I do 1 > None

test.py:12: error: Unsupported operand types for > ("int" and "None")

• What are the versions of mypy and Python you are using?
  mypy 0.782, python 3.8.2

• What are the mypy flags you are using? (For example --strict-optional)
  follow_imports=normal
  warn_redundant_casts=True
  warn_unused_ignores=True
  strict_optional=True
  strict_equality=True
  no_implicit_optional=True
  disallow_untyped_defs=True
  disallow_any_generics=True

Non viene indicato alcun file sorgente né alcun test. Inizia riproducendo i due esempi con mypy 0.782 e i flags elencati, quindi segui come viene verificato il tipo di list.sort() rispetto all’espressione di confronto. Il lavoro è completo quando i tipi di elemento incompatibili in [1, None].sort() producono una diagnosi appropriata e un test di regressione copre il comportamento.