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+Thu Jul 28 19:53:21 2016 Koichi Sasada <ko1@atdot.net>
+
+ * vm_core.h: revisit the structure of frame, block and env.
+ [Bug #12628]
+
+ This patch introduce many changes.
+
+ * Introduce concept of "Block Handler (BH)" to represent
+ passed blocks.
+
+ * move rb_control_frame_t::flag to ep[0] (as a special local
+ variable). This flags represents not only frame type, but also
+ env flags such as escaped.
+
+ * rename `rb_block_t` to `struct rb_block`.
+
+ * Make Proc, Binding and RubyVM::Env objects wb-protected.
+
+ Check [Bug #12628] for more details.
+
Thu Jul 28 15:05:12 2016 Nobuyoshi Nakada <nobu@ruby-lang.org>
* include/ruby/ruby.h (ruby_fl_type): use __extension__ to get rid