[issue14521] math.copysign(1., float('nan')) returns -1.

[Martin v. Löwis]

Martin v. Löwis <martin at v.loewis.de> added the comment:

The test should fail pre-patch and pass post-patch. There will be no state in the repository where the patch is present and fails, since it will be committed along with the patch. 

Skipping tests is only ok for tests that lack prerequisites on some systems, and (exceptionally) for tests that document known bugs.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue14521>
_______________________________________