1. cdbf50c bpo-34441: Fix ABC.__subclasscheck__ crash on classes with invalid __subclasses__ (GH-8835) by Alexey Izbyshev · 6 years ago
  2. c65bf3f bpo-32999: ast: Convert useless check to assert (GH-6197) by INADA Naoki · 6 years ago
  3. f757b72 bpo-32999: Revert GH-6002 (fc7df0e6) (GH-6189) by INADA Naoki · 6 years ago
  4. 40472dd bpo-33018: Improve issubclass() error checking and message. (GH-5944) by jab · 6 years ago
  5. fc7df0e bpo-32999: Fix ABC.__subclasscheck__ crash (GH-6002) by INADA Naoki · 6 years ago
  6. 03e3c34 bpo-31333: Re-implement ABCMeta in C (#5273) by Ivan Levkivskyi · 6 years ago