proc.c: frozen core methods

* proc.c (mproc, mlambda): use frozen core methods instead of plain
  global methods, so that methods cannot be overridden.
  [ruby-core:54687] [Bug #8345]
* vm.c (Init_VM): define proc and lambda on the frozen core object.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40528 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 0 deletions

diff --git a/vm.c b/vm.c
index 5636f80752..ac86401c3d 100644
--- a/vm.c
+++ b/vm.c
@@ -2258,6 +2258,8 @@ Init_VM(void)
     rb_define_method_id(klass, id_core_hash_merge_ary, m_core_hash_merge_ary, 2);
     rb_define_method_id(klass, id_core_hash_merge_ptr, m_core_hash_merge_ptr, -1);
     rb_define_method_id(klass, id_core_hash_merge_kwd, m_core_hash_merge_kwd, 2);
+    rb_define_method(klass, "proc", rb_block_proc, 0);
+    rb_define_method(klass, "lambda", rb_block_lambda, 0);
     rb_obj_freeze(fcore);
     rb_gc_register_mark_object(fcore);
     rb_mRubyVMFrozenCore = fcore;