36.2.1 appears to ignore install_requires with extras

Travis, Appveyor, and local builds of magic-wormhole started failing about an hour ago, when 36.2.1 was released. Our setup.py has:

      install_requires=[
          "spake2==0.7", "pynacl",
          "six",
          "twisted[tls] >= 17.5.0", # 17.5.0 adds failAfterFailures=
          "autobahn[twisted] >= 0.14.1",
          "automat",
          "hkdf",
          "tqdm >= 4.13.0", # 4.13.0 fixes crash on NetBSD
          "click",
          "humanize",
          "ipaddress",
          "txtorcon >= 0.19.3",
      ],

When I run pip install -e . in a virtualenv with setuptools-36.2.0, I see Autobahn-17.7.1 installed as expected. If I have setuptools-36.2.1, then Autobahn does not get installed. (Twisted does get installed, but it’s a dependency of txtorcon).

[jaraco]

setup(install_requires=[“autobahn[twisted] >= 0.14.1”]) is equivalent to setup(extras_require={‘twisted’: [“autobahn >= 0.14.1”]})

I’m pretty sure this statement is wrong.

The former syntax says “this package depends on autobahn with its twisted extra and autobahn should be version 0.14.1 or later”. The latter syntax says “this package offers an optional feature called “twisted” and if you ask for thispackage[twisted], this package will additionally depend on autobahn 0.14.1 or later.”

[jaraco]

Fix released with 36.2.2.