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* numeric.c (int_pow): make sure to assign the result of x * z.

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If xz is optimized out, the value won't overflow.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31805 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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naruse 2011-05-30 01:28:37 +00:00
parent 3b58e17d7b
commit 4e4649e13c
2 changed files with 6 additions and 1 deletions
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ChangeLog
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@ -1,3 +1,8 @@
Mon May 30 10:26:51 2011 NARUSE, Yui <naruse@ruby-lang.org>
* numeric.c (int_pow): make sure to assign the result of x * z.
If xz is optimized out, the value won't overflow.
Sun May 29 23:17:29 2011 NARUSE, Yui <naruse@ruby-lang.org>
* re.c (rb_reg_match): fix rdoc of Regexp#=~.

2
numeric.c
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@ -2637,7 +2637,7 @@ int_pow(long x, unsigned long y)
y >>= 1;
}
{
long xz = x * z;
volatile long xz = x * z;
if (!POSFIXABLE(xz) || xz / x != z) {
goto bignum;
}