* numeric.c (int_pow): fix previous nubu's commit.

	* test/ruby/test_fixnum.rb: new test.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12698 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 4 deletions

diff --git a/numeric.c b/numeric.c
index eba69debb8..c331030d63 100644
--- a/numeric.c
+++ b/numeric.c
@@ -2281,7 +2281,10 @@ int_pow(long x, unsigned long y)
     long z = 1;
 
     if (neg) x = -x;
-    if (y & 1) z = x;
+    if (y & 1)
+	z = x;
+    else
+	neg = 0;
     y &= ~1;
     do {
 	while (y % 2 == 0) {
@@ -2289,8 +2292,8 @@ int_pow(long x, unsigned long y)
 	    if (x2 < x || !POSFIXABLE(x2)) {
 		VALUE v;
 	      bignum:
-		v = rb_big_pow(rb_int2big(neg ? -x : x), LONG2NUM(y));
-		if (z != 1) v = rb_big_mul(rb_int2big(z), v);
+		v = rb_big_pow(rb_int2big(x), LONG2NUM(y));
+		if (z != 1) v = rb_big_mul(rb_int2big(neg ? -z : z), v);
 		return v;
 	    }
 	    x = x2;
@@ -2304,7 +2307,7 @@ int_pow(long x, unsigned long y)
 	    z = xz;
 	}
     } while (--y);
-    if (neg && (y & 1)) z = -z;
+    if (neg) z = -z;
     return LONG2NUM(z);
 }