* vm_insnhelper.c (vm_search_superclass): avoid control frame

stack overrun. currently super() in Proc created in a method
  defined by Module#define_method raise NoMethodError. [Bug #4881]
* test/ruby/test_method.rb t_super_in_proc_from_define_method):
  add test for it.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32227 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,11 @@
+Sat Jun 25 23:45:30 2011  CHIKANAGA Tomoyuki  <nagachika00@gmail.com>
+
+	* vm_insnhelper.c (vm_search_superclass): avoid control frame
+	  stack overrun. currently super() in Proc created in a method
+	  defined by Module#define_method raise NoMethodError. [Bug #4881]
+	* test/ruby/test_method.rb t_super_in_proc_from_define_method):
+	  add test for it.
+
 Sat Jun 25 23:23:14 2011  CHIKANAGA Tomoyuki  <nagachika00@gmail.com>
 
 	* thread.c (sleep_forever): now Kernel#sleep don't wakeup by

test/ruby/test_method.rb

@@ -233,6 +233,20 @@ class TestMethod < Test::Unit::TestCase
     end
   end
 
+  def test_super_in_proc_from_define_method
+    c1 = Class.new {
+      def m
+        :m1
+      end
+    }
+    c2 = Class.new(c1) { define_method(:m) { Proc.new { super() } } }
+    # c2.new.m.call should return :m1, but currently it raise NoMethodError.
+    # see [Bug #4881] and [Bug #3136]
+    assert_raise(NoMethodError) {
+      c2.new.m.call
+    }
+  end
+
   def test_clone
     o = Object.new
     def o.foo; :foo; end

vm_insnhelper.c

@@ -1410,9 +1410,14 @@ vm_search_superclass(rb_control_frame_t *reg_cfp, rb_iseq_t *iseq,
 	}
 
 	while (lcfp->iseq != iseq) {
+	    rb_thread_t *th = GET_THREAD();
 	    VALUE *tdfp = GET_PREV_DFP(lcfp->dfp);
 	    while (1) {
 		lcfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(lcfp);
+		if (RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, lcfp)) {
+		    rb_raise(rb_eNoMethodError,
+			     "super called outside of method");
+		}
 		if (lcfp->dfp == tdfp) {
 		    break;
 		}