Created attachment 1566033 [details]
Full log from Copr

python-tornado 5.1.1-1.fc31 fails to build with Python 3.8.0a4.
It seems to be treating a DeprecationWarning as error. 

+ /usr/bin/python3 -m tornado.test.runtests --verbose
Traceback (most recent call last):
  File "/usr/lib64/python3.8/runpy.py", line 192, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib64/python3.8/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/builddir/build/BUILD/tornado-5.1.1/tornado/test/runtests.py", line 219, in <module>
    main()
  File "/builddir/build/BUILD/tornado-5.1.1/tornado/test/runtests.py", line 204, in main
    tornado.testing.main(**kwargs)
  File "/builddir/build/BUILD/tornado-5.1.1/tornado/testing.py", line 720, in main
    unittest.main(defaultTest="all", argv=argv, **kwargs)
  File "/usr/lib64/python3.8/unittest/main.py", line 100, in __init__
    self.parseArgs(argv)
  File "/usr/lib64/python3.8/unittest/main.py", line 147, in parseArgs
    self.createTests()
  File "/usr/lib64/python3.8/unittest/main.py", line 158, in createTests
    self.test = self.testLoader.loadTestsFromNames(self.testNames,
  File "/usr/lib64/python3.8/unittest/loader.py", line 220, in loadTestsFromNames
    suites = [self.loadTestsFromName(name, module) for name in names]
  File "/usr/lib64/python3.8/unittest/loader.py", line 220, in <listcomp>
    suites = [self.loadTestsFromName(name, module) for name in names]
  File "/usr/lib64/python3.8/unittest/loader.py", line 205, in loadTestsFromName
    test = obj()
  File "/builddir/build/BUILD/tornado-5.1.1/tornado/test/runtests.py", line 65, in all
    return unittest.defaultTestLoader.loadTestsFromNames(TEST_MODULES)
  File "/usr/lib64/python3.8/unittest/loader.py", line 220, in loadTestsFromNames
    suites = [self.loadTestsFromName(name, module) for name in names]
  File "/usr/lib64/python3.8/unittest/loader.py", line 220, in <listcomp>
    suites = [self.loadTestsFromName(name, module) for name in names]
  File "/usr/lib64/python3.8/unittest/loader.py", line 154, in loadTestsFromName
    module = __import__(module_name)
  File "/builddir/build/BUILD/tornado-5.1.1/tornado/test/auth_test.py", line 12, in <module>
    from tornado.auth import (
  File "/builddir/build/BUILD/tornado-5.1.1/tornado/auth.py", line 144, in <module>
    class OpenIdMixin(object):
  File "/builddir/build/BUILD/tornado-5.1.1/tornado/auth.py", line 152, in OpenIdMixin
    def authenticate_redirect(self, callback_uri=None,
  File "/builddir/build/BUILD/tornado-5.1.1/tornado/concurrent.py", line 529, in _non_deprecated_return_future
    replacer = ArgReplacer(f, 'callback')
  File "/builddir/build/BUILD/tornado-5.1.1/tornado/util.py", line 397, in __init__
    self.arg_pos = self._getargnames(func).index(name)
  File "/builddir/build/BUILD/tornado-5.1.1/tornado/util.py", line 405, in _getargnames
    return getargspec(func).args
  File "/usr/lib64/python3.8/inspect.py", line 1114, in getfullargspec
    warnings.warn("Use inspect.signature() instead of inspect.getfullargspec()",
DeprecationWarning: Use inspect.signature() instead of inspect.getfullargspec()

Full log attached.