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util.c: do not underflow

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* util.c (ruby_strtod): do not underflow only by preceeding zeros,
  which may be canceled out by the exponent.
  http://twitter.com/kazuho/status/753829998767714305

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55689 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-07-15 08:08:59 +00:00
parent 363c90853e
commit 5292b2727a
3 changed files with 8 additions and 1 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
Fri Jul 15 17:08:57 2016 Nobuyoshi Nakada <nobu@ruby-lang.org>
* util.c (ruby_strtod): do not underflow only by preceeding zeros,
which may be canceled out by the exponent.
http://twitter.com/kazuho/status/753829998767714305
Fri Jul 15 15:32:13 2016 NAKAMURA Usaku <usa@ruby-lang.org>
* time.c (time_arg): it seems that this function sometimes causes SEGV

1
test/ruby/test_literal.rb
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@ -493,6 +493,7 @@ class TestRubyLiteral < Test::Unit::TestCase
}
}
}
assert_equal(100.0, 0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100e100)
end
def test_symbol_list

2
util.c
View File

@ -2145,7 +2145,7 @@ break2:
for (; c >= '0' && c <= '9'; c = *++s) {
have_dig:
nz++;
if (nf > DBL_DIG * 4) continue;
if (nd > DBL_DIG * 4) continue;
if (c -= '0') {
nf += nz;
for (i = 1; i < nz; i++)