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, 2 deletions

diff --git a/proc.c b/proc.c
index 57d4ae05a9..6f0e83aada 100644
--- a/proc.c
+++ b/proc.c
@@ -2000,13 +2000,13 @@ method_inspect(VALUE method)
 static VALUE
 mproc(VALUE method)
 {
-    return rb_funcall(Qnil, rb_intern("proc"), 0);
+    return rb_funcall2(rb_mRubyVMFrozenCore, rb_intern("proc"), 0, 0);
 }
 
 static VALUE
 mlambda(VALUE method)
 {
-    return rb_funcall(Qnil, rb_intern("lambda"), 0);
+    return rb_funcall(rb_mRubyVMFrozenCore, rb_intern("lambda"), 0, 0);
 }
 
 static VALUE