diff --git a/ChangeLog b/ChangeLog
index 58987bb6d69b16..9beefb869dfca4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,20 @@
+Wed Jun 26 16:52:57 2013  Kazuki Tsujimoto  <kazuki@callcc.net>
+
+	* test/ruby/test_proc.rb (TestProc#test_block_given_method_to_proc):
+	  run test for r41359.
+
+Wed Jun 26 16:52:57 2013  Kazuki Tsujimoto  <kazuki@callcc.net>
+
+	* include/ruby/intern.h, proc.c (rb_method_call_with_block):
+	  new function to invoke a Method object with a block passed
+	  as an argument.
+
+	* proc.c (bmcall): use the above function to avoid a block sharing.
+	  [ruby-core:54626] [Bug #8341]
+
+	* test/ruby/test_proc.rb (TestProc#test_block_persist_between_calls):
+	  run related tests.
+
 Wed Jun 26 16:36:39 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* defs/id.def (predefined): add "idProc".
diff --git a/include/ruby/intern.h b/include/ruby/intern.h
index 98ef95230f4691..5851f2083b700e 100644
--- a/include/ruby/intern.h
+++ b/include/ruby/intern.h
@@ -361,6 +361,7 @@ VALUE rb_binding_new(void);
 VALUE rb_obj_method(VALUE, VALUE);
 VALUE rb_obj_is_method(VALUE);
 VALUE rb_method_call(int, VALUE*, VALUE);
+VALUE rb_method_call_with_block(int, VALUE *, VALUE, VALUE);
 int rb_mod_method_arity(VALUE, ID);
 int rb_obj_method_arity(VALUE, ID);
 VALUE rb_protect(VALUE (*)(VALUE), VALUE, int*);
diff --git a/proc.c b/proc.c
index fdd148ebe94dd0..ca6d3c47697029 100644
--- a/proc.c
+++ b/proc.c
@@ -27,7 +27,7 @@ VALUE rb_cMethod;
 VALUE rb_cBinding;
 VALUE rb_cProc;
 
-static VALUE bmcall(VALUE, VALUE);
+static VALUE bmcall(VALUE, VALUE, int, VALUE *, VALUE);
 static int method_arity(VALUE);
 
 /* Proc */
@@ -1406,6 +1406,13 @@ method_clone(VALUE self)
 
 VALUE
 rb_method_call(int argc, VALUE *argv, VALUE method)
+{
+    VALUE proc = rb_block_given_p() ? rb_block_proc() : Qnil;
+    return rb_method_call_with_block(argc, argv, method, proc);
+}
+
+VALUE
+rb_method_call_with_block(int argc, VALUE *argv, VALUE method, VALUE pass_procval)
 {
     VALUE result = Qnil;	/* OK */
     struct METHOD *data;
@@ -1425,8 +1432,15 @@ rb_method_call(int argc, VALUE *argv, VALUE method)
     }
     if ((state = EXEC_TAG()) == 0) {
 	rb_thread_t *th = GET_THREAD();
+	rb_block_t *block = 0;
+
+	if (!NIL_P(pass_procval)) {
+	    rb_proc_t *pass_proc;
+	    GetProcPtr(pass_procval, pass_proc);
+	    block = &pass_proc->block;
+	}
 
-	PASS_PASSED_BLOCK_TH(th);
+	th->passed_block = block;
 	result = rb_vm_call(th, data->recv, data->id,  argc, argv, data->me);
     }
     POP_TAG();
@@ -1802,11 +1816,10 @@ mlambda(VALUE method)
 }
 
 static VALUE
-bmcall(VALUE args, VALUE method)
+bmcall(VALUE args, VALUE method, int argc, VALUE *argv, VALUE passed_proc)
 {
     volatile VALUE a;
     VALUE ret;
-    int argc;
 
     if (CLASS_OF(args) != rb_cArray) {
 	args = rb_ary_new3(1, args);
@@ -1815,7 +1828,7 @@ bmcall(VALUE args, VALUE method)
     else {
 	argc = check_argc(RARRAY_LEN(args));
     }
-    ret = rb_method_call(argc, RARRAY_PTR(args), method);
+    ret = rb_method_call_with_block(argc, RARRAY_PTR(args), method, passed_proc);
     RB_GC_GUARD(a) = args;
     return ret;
 }
diff --git a/test/ruby/test_proc.rb b/test/ruby/test_proc.rb
index 31180bab8f68f0..7560ce94efc053 100644
--- a/test/ruby/test_proc.rb
+++ b/test/ruby/test_proc.rb
@@ -141,6 +141,14 @@ def block
     method(:m2).to_proc
   end
 
+  def m1(var)
+    var
+  end
+
+  def m_block_given?
+    m1(block_given?)
+  end
+
   # [yarv-dev:777] block made by Method#to_proc
   def test_method_to_proc
     b = block()
@@ -148,6 +156,37 @@ def test_method_to_proc
     assert_instance_of(Binding, b.binding, '[ruby-core:25589]')
   end
 
+  def test_block_given_method
+    m = method(:m_block_given?)
+    assert(!m.call, "without block")
+    assert(m.call {}, "with block")
+    assert(!m.call, "without block second")
+  end
+
+  def test_block_given_method_to_proc
+    bug8341 = '[Bug #8341]'
+    m = method(:m_block_given?).to_proc
+    assert(!m.call, "#{bug8341} without block")
+    assert(m.call {}, "#{bug8341} with block")
+    assert(!m.call, "#{bug8341} without block second")
+  end
+
+  def test_block_persist_between_calls
+    bug8341 = '[Bug #8341]'
+    o = Object.new
+    def o.m1(top=true)
+      if top
+        [block_given?, @m.call(false)]
+      else
+        block_given?
+      end
+    end
+    m = o.method(:m1).to_proc
+    o.instance_variable_set(:@m, m)
+    assert_equal([true, false], m.call {}, "#{bug8341} nested with block")
+    assert_equal([false, false], m.call, "#{bug8341} nested without block")
+  end
+
   def test_curry
     b = proc {|x, y, z| (x||0) + (y||0) + (z||0) }
     assert_equal(6, b.curry[1][2][3])
diff --git a/version.h b/version.h
index 937e808e64ed86..81d2b327552ef0 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.3"
-#define RUBY_PATCHLEVEL 441
+#define RUBY_PATCHLEVEL 442
 
 #define RUBY_RELEASE_DATE "2013-06-26"
 #define RUBY_RELEASE_YEAR 2013