* numeric.c (int_to_f): raise NotImplementedError when a receiver

class is unknown.

* test/-ext-/integer/test_my_integer.rb (test_my_integer_to_f): modify
  a test for the above change.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54192 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,11 @@
+Sat Mar 19 18:32:00 2016  Kenta Murata  <mrkn@mrkn.jp>
+
+	* numeric.c (int_to_f): raise NotImplementedError when a receiver
+	  class is unknown.
+
+	* test/-ext-/integer/test_my_integer.rb (test_my_integer_to_f): modify
+	  a test for the above change.
+
 Sat Mar 19 18:21:00 2016  Kenta Murata  <mrkn@mrkn.jp>
 
 	* bignum.c (Bignum#<=>): remove it because they are unified with

numeric.c

@@ -3799,7 +3799,7 @@ int_to_f(VALUE num)
 	val = rb_big2dbl(num);
     }
     else {
-	rb_raise(rb_eTypeError, "Unknown subclass for to_f: %s", rb_obj_classname(num));
+	rb_raise(rb_eNotImpError, "Unknown subclass for to_f: %s", rb_obj_classname(num));
     }
 
     return DBL2NUM(val);

test/-ext-/integer/test_my_integer.rb

@@ -4,7 +4,7 @@ require "-test-/integer"
 
 class TestIntegerExt < Test::Unit::TestCase
   def test_my_integer_to_f
-    assert_raise(TypeError) do
+    assert_raise(NotImplementedError) do
       Bug::Integer::MyInteger.new.to_f
     end