New submission from STINNER Victor <vstin...@python.org>:
https://buildbot.python.org/all/#/builders/302/builds/338 FAIL: test_nextafter (test.test_math.MathTests) ---------------------------------------------------------------------- Traceback (most recent call last): File "/home/aixtools/buildarea/3.9.aixtools-aix-power6/build/Lib/test/test_math.py", line 1968, in test_nextafter self.assertIsNaN(math.nextafter(NAN, 1.0)) File "/home/aixtools/buildarea/3.9.aixtools-aix-power6/build/Lib/test/test_math.py", line 2015, in assertIsNaN self.fail("Expected a NaN, got {!r}.".format(value)) AssertionError: Expected a NaN, got 1.0. The test: # NaN self.assertIsNaN(math.nextafter(NAN, 1.0)) # <=== HERE self.assertIsNaN(math.nextafter(1.0, NAN)) self.assertIsNaN(math.nextafter(NAN, NAN)) The Linux manual page says: "If x or y is a NaN, a NaN is returned." https://man7.org/linux/man-pages/man3/nextafter.3.html But it seems like the AIX libc doesn't implement this rule. Should we implement this rule in Python on AIX? The strange thing is that it worked previously. test.python of build 338: platform.platform: AIX-2-00F9C1964C00-powerpc-32bit sysconfig[HOST_GNU_TYPE]: powerpc-ibm-aix7.2.4.0 platform.architecture: 32bit The latest green build is built 347. test.pythoninfo of build 347: platform.architecture: 32bit platform.platform: AIX-2-00F9C1964C00-powerpc-32bit sysconfig[HOST_GNU_TYPE]: powerpc-ibm-aix7.2.0.0 Was the machine updated two days ago (2020-11-09), between build 338 and build 347? ---------- components: Tests messages: 380751 nosy: lemburg, mark.dickinson, rhettinger, stutzbach, vstinner priority: normal severity: normal status: open title: [AIX] test_math: test_nextafter(float('nan'), 1.0) does not return a NaN on AIX versions: Python 3.10 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue42323> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
