nobu	2018-10-05 09:37:40 +0900 (Fri, 05 Oct 2018)

  New Revision: 64919

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=64919

  Log:
    Remove wrong conversion
    
    * rational.c (nurat_to_double): should return `double`, not `Float`.
      fix r64897.  [Bug #15189]

  Modified files:
    trunk/rational.c
Index: rational.c
===================================================================
--- rational.c	(revision 64918)
+++ rational.c	(revision 64919)
@@ -1556,8 +1556,7 @@ nurat_to_double(VALUE self) https://github.com/ruby/ruby/blob/trunk/rational.c#L1556
 {
     get_dat1(self);
     if (!RB_INTEGER_TYPE_P(dat->num) || !RB_INTEGER_TYPE_P(dat->den)) {
-        double d = NUM2DBL(dat->num) / NUM2DBL(dat->den);
-        return DBL2NUM(d);
+        return NUM2DBL(dat->num) / NUM2DBL(dat->den);
     }
     return rb_int_fdiv_double(dat->num, dat->den);
 }

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