* numeric.c (rb_float_new_in_heap), include/ruby/ruby.h:

  make all Float objects frozen.
  [ruby-dev:46081] [ruby-trunk - Feature #6936]
  Most part of patch by NARUSE, Yui  <naruse@ruby-lang.org>.
* class.c (singleton_class_of): raise TypeError when
  trying to define a singleton method on Float objects.
* vm.c (vm_define_method): ditto.
* test/ruby/marshaltestlib.rb: catch up above changes.
* test/ruby/test_class.rb: ditto.
* test/test_pp.rb: ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37341 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 0 deletions

diff --git a/class.c b/class.c
index 11c463e1e3..c5f0390853 100644
--- a/class.c
+++ b/class.c
@@ -1322,6 +1322,10 @@ singleton_class_of(VALUE obj)
 	    rb_bug("unknown immediate %p", (void *)obj);
 	return klass;
     }
+    else {
+       if (BUILTIN_TYPE(obj) == T_FLOAT)
+           rb_raise(rb_eTypeError, "can't define singleton");
+    }
 
     if (FL_TEST(RBASIC(obj)->klass, FL_SINGLETON) &&
 	rb_ivar_get(RBASIC(obj)->klass, id_attached) == obj) {