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rational.c: zero division

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* rational.c (read_rat_nos): denominator cannot be 0, raise zero
  division in that case.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57985 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-03-16 01:53:52 +00:00
parent 1e07906a42
commit b296e29035
2 changed files with 6 additions and 0 deletions
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1
rational.c
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@ -2396,6 +2396,7 @@ read_rat_nos(const char **s, int sign, int strict, VALUE *num)
if (**s == '/') { if (**s == '/') {
(*s)++; (*s)++;
if (!read_digits(s, strict, &den, NULL)) goto failed; if (!read_digits(s, strict, &den, NULL)) goto failed;
if (den == ZERO) rb_num_zerodiv();
nurat_reduce(num, &den); nurat_reduce(num, &den);
if (div != ONE && den != ONE) if (div != ONE && den != ONE)
den = rb_int_mul(den, div); den = rb_int_mul(den, div);

5
test/ruby/test_rational.rb
View file

@ -776,6 +776,11 @@ class Rational_Test < Test::Unit::TestCase
ng[5, 3, '5/3x'] ng[5, 3, '5/3x']
end end
def test_parse_zero_denominator
assert_raise(ZeroDivisionError) {"1/0".to_r}
assert_raise(ZeroDivisionError) {Rational("1/0")}
end
def test_to_i def test_to_i
assert_equal(1, Rational(3,2).to_i) assert_equal(1, Rational(3,2).to_i)
assert_equal(1, Integer(Rational(3,2))) assert_equal(1, Integer(Rational(3,2)))