* math.c (math_atanh): Fix bug for Math.atanh(+/-1). It now returns +-Infinity. [ruby-core:26028]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25279 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sat Oct 10 14:55:55 2009  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
+
+	* math.c (math_atanh): Fix bug for Math.atanh(+/-1). It now returns
+	  +-Infinity. [ruby-core:26028]
+
 Sat Oct 10 14:09:40 2009  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
 
 	* thread.c (rb_threadptr_execute_interrupts_rec, rb_threadptr_raise):

math.c

@@ -298,7 +298,6 @@ math_atanh(VALUE obj, VALUE x)
     d0 = RFLOAT_VALUE(x);
     d = atanh(d0);
     domain_check(d0, d, "atanh");
-    infinity_check(x, d, "atanh");
     return DBL2NUM(d);
 }