Mark Dickinson added the comment:
Also failures on Gentoo: here b is positive (possibly +inf), and c is finite,
so we expect an infinite result. Instead, we're apparently getting a NaN. I
don't have a good guess about what's causing this: the rest of the tests are
passing, so it's unlikely that we're using a bad FMA emulation. Maybe an
optimization bug?
======================================================================
ERROR: test_fma_infinities (test.test_math.FMATests)
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/buildbot/buildarea/3.x.ware-gentoo-x86.installed/build/target/lib/python3.7/test/test_math.py",
line 1482, in test_fma_infinities
self.assertEqual(math.fma(math.inf, b, c), math.inf)
ValueError: invalid operation in fma
----------
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue29282>
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