diff --git a/ChangeLog b/ChangeLog
index bb17b14072..2f022be490 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+Sun Feb 26 11:26:44 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* compile.c (iseq_compile_each): call on special object instead of
+	  self.  since stabby lambda is a syntax, so it should not be
+	  affected by the context.  [ruby-core:42349][Bug #5966]
+
+	* insns.def (send): no special deal for FCALL.  self should be put
+	  on TOS instead.
+
 Sun Feb 26 05:35:43 2012  NARUSE, Yui  <naruse@ruby-lang.org>
 
 	* error.c (report_bug): use buf and snprintf to avoid consuming stack.
diff --git a/compile.c b/compile.c
index c8aced3672..d4b7d2c79b 100644
--- a/compile.c
+++ b/compile.c
@@ -208,7 +208,7 @@ r_value(VALUE value)
   ADD_SEND_R((seq), (line), (id), (argc), (VALUE)Qfalse, (VALUE)INT2FIX(0))
 
 #define ADD_CALL_RECEIVER(seq, line) \
-  ADD_INSN((seq), (line), putnil)
+  ADD_INSN((seq), (line), putself)
 
 #define ADD_CALL(seq, line, id, argc) \
   ADD_SEND_R((seq), (line), (id), (argc), (VALUE)Qfalse, (VALUE)INT2FIX(VM_CALL_FCALL_BIT))
@@ -5098,7 +5098,7 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
 	/* compile same as lambda{...} */
 	VALUE block = NEW_CHILD_ISEQVAL(node->nd_body, make_name_for_block(iseq), ISEQ_TYPE_BLOCK, nd_line(node));
 	VALUE argc = INT2FIX(0);
-	ADD_CALL_RECEIVER(ret, nd_line(node));
+	ADD_INSN1(ret, nd_line(node), putspecialobject, INT2FIX(VM_SPECIAL_OBJECT_VMCORE));
 	ADD_CALL_WITH_BLOCK(ret, nd_line(node), ID2SYM(idLambda), argc, block);
 
 	if (poped) {
diff --git a/insns.def b/insns.def
index 59a98c0804..4c82df4c33 100644
--- a/insns.def
+++ b/insns.def
@@ -1012,7 +1012,7 @@ send
     ID id = op_id;
 
     /* get receiver */
-    recv = (flag & VM_CALL_FCALL_BIT) ? GET_SELF() : TOPN(num);
+    recv = TOPN(num);
     klass = CLASS_OF(recv);
     me = vm_method_search(id, klass, ic);
     CALL_METHOD(num, blockptr, flag, id, me, recv);
diff --git a/test/ruby/test_lambda.rb b/test/ruby/test_lambda.rb
index 02bb26939d..ae12c6d609 100644
--- a/test/ruby/test_lambda.rb
+++ b/test/ruby/test_lambda.rb
@@ -63,4 +63,11 @@ class TestLambdaParameters < Test::Unit::TestCase
   def foo
     assert_equal(nil, ->(&b){ b }.call)
   end
+
+  def test_in_basic_object
+    bug5966 = '[ruby-core:42349]'
+    called = false
+    BasicObject.new.instance_eval {->() {called = true}.()}
+    assert_equal(true, called, bug5966)
+  end
 end