Le 17/11/2012 02:09, smichr a écrit :
The failing report is at
https://travis-ci.org/sympy/sympy/builds/3212369  and another one will
be available when the tests finish again. There should be no difference,
however, since I only squashed the last two commits together.

It's something to do with Function('gamma') somehow pre-empting the real gamma function. The problem can easily be reproduced in master:

In [1]: Function('gamma')
Out[1]: sympy.core.function.gamma

In [2]: from sympy.core.tests.test_wester import test_J10

In [3]: test_J10()
---------------------------------------------------------------------------
AssertionError                            Traceback (most recent call last)
/home/ronan/dev/sympy/<ipython-input-3-fced9a91586b> in <module>()
----> 1 test_J10()

/home/ronan/dev/sympy/sympy/core/tests/test_wester.pyc in test_J10()
    510 def test_J10():
    511     mu, nu = symbols('mu, nu', integer=True)
--> 512 assert assoc_legendre(nu, mu, 0) == 2**mu*sqrt(pi)/gamma((nu-mu)/2+1)/gamma((-nu-mu+1)/2)
    513
    514 def test_J11():

AssertionError:



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