* bignum.c (bignew_1): Bignum instances are frozen.

  Feature #3222
* include/ruby/ruby.h: Fixnum instances are also frozen.
* class.c (singleton_class_of): check Bignum before
  singleton cheking.
* test/ruby/test_bignum.rb: add a test.
* test/ruby/test_fixnum.rb: ditto.
* test/ruby/marshaltestlib.rb, test/ruby/test_eval.rb,
  test/ruby/test_object.rb: catch up above changes.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37348 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 1 deletions

diff --git a/class.c b/class.c
index c5f0390853..e083bf633d 100644
--- a/class.c
+++ b/class.c
@@ -1323,8 +1323,10 @@ singleton_class_of(VALUE obj)
 	return klass;
     }
     else {
-       if (BUILTIN_TYPE(obj) == T_FLOAT)
+	enum ruby_value_type type = BUILTIN_TYPE(obj);
+	if (type == T_FLOAT || type == T_BIGNUM) {
            rb_raise(rb_eTypeError, "can't define singleton");
+	}
     }
 
     if (FL_TEST(RBASIC(obj)->klass, FL_SINGLETON) &&