[NumPy-Tickets] [NumPy] #1755: Raise-FPE test failure on Windows

[NumPy Trac]

#1755: Raise-FPE test failure on Windows
-----------------------------------------+----------------------------------
 Reporter:  rgommers                     |       Owner:  somebody
     Type:  defect                       |      Status:  new     
 Priority:  normal                       |   Milestone:  1.6.0   
Component:  numpy.core                   |     Version:  1.5.1   
 Keywords:  power, floating point error  |  
-----------------------------------------+----------------------------------
 np.power fails to raise an exception on Windows (tested on py-3.1 and
 py-2.6). Test failure:
 {{{
 ======================================================================
 FAIL: test_floating_exceptions (test_numeric.TestFloatExceptions)
 Test basic arithmetic function errors
 ----------------------------------------------------------------------
 Traceback (most recent call last):
   File "Z:\Users\rgommers\.wine\drive_c\Python31\lib\site-
 packages\numpy\core\tests\test_numeric.py", line 320, in
 test_floating_exceptions
     np.power, ftype(2), ftype(2**fi.nexp))
   File "Z:\Users\rgommers\.wine\drive_c\Python31\lib\site-
 packages\numpy\core\tests\test_numeric.py", line 261, in assert_raises_fpe
     "Type %s did not raise fpe error '%s'." % (ftype, fpeerr))
   File "Z:\Users\rgommers\.wine\drive_c\Python31\lib\site-
 packages\numpy\testing\utils.py", line 34, in assert_
     raise AssertionError(msg)
 AssertionError: Type <class 'numpy.float64'> did not raise fpe error
 'overflow'.
 }}}

 Result on Windows:
 {{{
 >>> 2.0 ** 2048
 Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
 OverflowError: (34, 'Result too large')
 >>> np.power(2.0, 2048)
 inf
 }}}

 Result on OS X (as expected)
 {{{
 >>> 2.0**2048
 ------------------------------------------------------------
 Traceback (most recent call last):
   File "<ipython console>", line 1, in <module>
 OverflowError: (34, 'Result too large')

 >>> np.power(2.0, 2048)
 Warning: overflow encountered in power
 inf
 }}}

-- 
Ticket URL: <http://projects.scipy.org/numpy/ticket/1755>
NumPy <http://projects.scipy.org/numpy>
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