ipython fails to build (with Python 3.9.0b1 and 3.8.3):

======================================================================
FAIL: Test color settings for latex_to_png.
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/builddir/build/BUILDROOT/ipython-7.14.0-3.fc33.x86_64/usr/lib/python3.9/site-packages/IPython/testing/decorators.py", line 212, in skipper_func
    return f(*args, **kwargs)
  File "/builddir/build/BUILDROOT/ipython-7.14.0-3.fc33.x86_64/usr/lib/python3.9/site-packages/IPython/lib/tests/test_latextools.py", line 160, in test_latex_to_png_color
    nt.assert_not_equal(dvipng_black, dvipng_maroon)
AssertionError: None == None
>>  raise self.failureException('None == None')


See also https://koschei.fedoraproject.org/package/ipython?collection=f33


For the build logs, see:
https://download.copr.fedorainfracloud.org/results/@python/python3.9/fedora-rawhide-x86_64/01400204-ipython/

For all our attempts to build ipython with Python 3.9, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.9/package/ipython/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.9:
https://copr.fedorainfracloud.org/coprs/g/python/python3.9/

Let us know here if you have any questions.

Python 3.9 will be included in Fedora 33. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.9.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.