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, 11 insertions, 0 deletions

diff --git a/test/ruby/test_proc.rb b/test/ruby/test_proc.rb
index dc426ddda5..a8933b0c76 100644
--- a/test/ruby/test_proc.rb
+++ b/test/ruby/test_proc.rb
@@ -1,4 +1,5 @@
 require 'test/unit'
+require_relative 'envutil'
 
 class TestProc < Test::Unit::TestCase
   def setup
@@ -1157,4 +1158,14 @@ class TestProc < Test::Unit::TestCase
       assert_equal('zot', o.method(:foo).to_proc.() {'zot'}, bug3792)
     }
   end
+
+  def test_overriden_lambda
+    bug8345 = '[ruby-core:54687] [Bug #8345]'
+    assert_normal_exit('def lambda; end; method(:puts).to_proc', bug8345)
+  end
+
+  def test_overriden_proc
+    bug8345 = '[ruby-core:54688] [Bug #8345]'
+    assert_normal_exit('def proc; end; ->{}.curry', bug8345)
+  end
 end