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rational.c: infinity in power

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* rational.c (nurat_expt): return Infinity due to overflow.
  [ruby-core:79686] [Bug #13242]:

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57688 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-02-22 23:28:26 +00:00
parent 3f6aeba69a
commit 06010b2b05
3 changed files with 12 additions and 0 deletions
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6
test/ruby/test_rational.rb
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@ -955,6 +955,12 @@ class Rational_Test < Test::Unit::TestCase
assert_raise(ZeroDivisionError, bug5713) { Rational(0, 1) ** Rational(-2,3) }
end
def test_power_overflow
bug = '[ruby-core:79686] [Bug #13242]: Infinity due to overflow'
x = EnvUtil.suppress_warning {4r**40000000}
assert_predicate x, :infinite?, bug
end
def test_positive_p
assert_predicate(1/2r, :positive?)
assert_not_predicate(-1/2r, :positive?)