diff --git a/ChangeLog b/ChangeLog
index d719242abf..3f8276c832 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,18 @@
+Sun Aug 31 16:38:26 2014  Koichi Sasada  <ko1@atdot.net>
+
+	* vm_core.h: add VM_FRAME_MAGIC_RESCUE to recognize normal block or
+	  rescue clause.
+
+	* vm.c (vm_exec): use VM_FRAME_MAGIC_RESCUE on at rescue/ensure.
+
+	* test/ruby/test_settracefunc.rb: should not invoke b_return at rescue
+	  clause.
+	  [Bug #9957]
+
+	* vm_dump.c (control_frame_dump): check VM_FRAME_MAGIC_RESCUE.
+
+	* vm_dump.c (vm_stack_dump_each): ditto.
+
 Sun Aug 31 16:32:10 2014  Hiroshi Shirosaki  <h.shirosaki@gmail.com>
 
 	* lib/test/unit/parallel.rb: fix test-all parallel failure if a test
diff --git a/test/ruby/test_settracefunc.rb b/test/ruby/test_settracefunc.rb
index 5c4a9026d2..184cc91566 100644
--- a/test/ruby/test_settracefunc.rb
+++ b/test/ruby/test_settracefunc.rb
@@ -1104,4 +1104,40 @@ class TestSetTraceFunc < Test::Unit::TestCase
     ], events, bug59398)
   end
 
+
+  def method_test_rescue_should_not_cause_b_return
+    begin
+      raise
+    rescue
+      return
+    end
+  end
+
+  def method_test_ensure_should_not_cause_b_return
+    begin
+      raise
+    ensure
+      return
+    end
+  end
+
+  def test_rescue_and_ensure_should_not_cause_b_return
+    curr_thread = Thread.current
+    trace = TracePoint.new(:b_call, :b_return){
+      next if curr_thread != Thread.current
+      flunk("Should not reach here because there is no block.")
+    }
+
+    begin
+      trace.enable
+      method_test_rescue_should_not_cause_b_return
+      begin
+        method_test_ensure_should_not_cause_b_return
+      rescue
+        # ignore
+      end
+    ensure
+      trace.disable
+    end
+  end
 end
diff --git a/version.h b/version.h
index 0d602f1052..90d50eebf3 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.0.0"
 #define RUBY_RELEASE_DATE "2014-08-31"
-#define RUBY_PATCHLEVEL 539
+#define RUBY_PATCHLEVEL 540
 
 #define RUBY_RELEASE_YEAR 2014
 #define RUBY_RELEASE_MONTH 8
diff --git a/vm.c b/vm.c
index df8146113c..d960520d5d 100644
--- a/vm.c
+++ b/vm.c
@@ -1099,6 +1099,7 @@ vm_frametype_name(const rb_control_frame_t *cfp)
       case VM_FRAME_MAGIC_IFUNC:  return "ifunc";
       case VM_FRAME_MAGIC_EVAL:   return "eval";
       case VM_FRAME_MAGIC_LAMBDA: return "lambda";
+      case VM_FRAME_MAGIC_RESCUE: return "rescue";
       default:
 	rb_bug("unknown frame");
     }
@@ -1395,7 +1396,7 @@ vm_exec(rb_thread_t *th)
 
 	    /* push block frame */
 	    cfp->sp[0] = err;
-	    vm_push_frame(th, catch_iseq, VM_FRAME_MAGIC_BLOCK,
+	    vm_push_frame(th, catch_iseq, VM_FRAME_MAGIC_RESCUE,
 			  cfp->self, cfp->klass,
 			  VM_ENVVAL_PREV_EP_PTR(cfp->ep),
 			  catch_iseq->iseq_encoded,
diff --git a/vm_core.h b/vm_core.h
index 0bffdd3daa..3457773494 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -730,7 +730,8 @@ enum vm_special_object_type {
 #define VM_FRAME_MAGIC_IFUNC  0x81
 #define VM_FRAME_MAGIC_EVAL   0x91
 #define VM_FRAME_MAGIC_LAMBDA 0xa1
-#define VM_FRAME_MAGIC_MASK_BITS   8
+#define VM_FRAME_MAGIC_RESCUE 0xb1
+#define VM_FRAME_MAGIC_MASK_BITS 8
 #define VM_FRAME_MAGIC_MASK   (~(~0<<VM_FRAME_MAGIC_MASK_BITS))
 
 #define VM_FRAME_TYPE(cfp) ((cfp)->flag & VM_FRAME_MAGIC_MASK)
diff --git a/vm_dump.c b/vm_dump.c
index 04d9610aa9..06ee098a6d 100644
--- a/vm_dump.c
+++ b/vm_dump.c
@@ -73,6 +73,9 @@ control_frame_dump(rb_thread_t *th, rb_control_frame_t *cfp)
       case VM_FRAME_MAGIC_EVAL:
 	magic = "EVAL";
 	break;
+      case VM_FRAME_MAGIC_RESCUE:
+	magic = "RESCUE";
+	break;
       case 0:
 	magic = "------";
 	break;
@@ -268,15 +271,17 @@ vm_stack_dump_each(rb_thread_t *th, rb_control_frame_t *cfp)
 
     /* stack trace header */
 
-    if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_METHOD ||
-	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_TOP ||
+    if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_METHOD||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_TOP   ||
 	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_BLOCK ||
 	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_CLASS ||
-	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_PROC ||
-	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_LAMBDA ||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_PROC  ||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_LAMBDA||
 	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_CFUNC ||
 	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_IFUNC ||
-	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_EVAL) {
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_EVAL  ||
+	VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_RESCUE)
+      {
 
 	VALUE *ptr = ep - local_size;