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Issue #8986: erfc was raising OverflowError on Linux for arguments in

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the (approximate) range (-27.3, 30.0), as a result of an escaped errno
value.
This commit is contained in:
Mark Dickinson 2010-06-13 10:50:29 +00:00
parent 8842c356aa
commit e979ec8fbf
5 changed files with 68 additions and 6 deletions
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9
Lib/test/test_math.py
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@ -996,6 +996,15 @@ class MathTests(unittest.TestCase):
accuracy_failure = acc_check(expected, got,
rel_err = 5e-15,
abs_err = 5e-15)
elif fn == 'erfc':
# erfc has less-than-ideal accuracy for large
# arguments (x ~ 25 or so), mainly due to the
# error involved in computing exp(-x*x).
#
# XXX Would be better to weaken this test only
# for large x, instead of for all x.
accuracy_failure = ulps_check(expected, got, 2000)
else:
accuracy_failure = ulps_check(expected, got, 20)
if accuracy_failure is None: