mruby/mruby — pull request #1722 by take-cheeze (2014-02-21 15:21:30+00:00)
Title: Fix possible arena overflow in mruby-hast-ext.

Possible arena overflow may happen in `values_at` method when
* `hash` has default proc.(return value of `mrb_funcall` is `mrb_gc_protect`ed)
* user passed many arguments using `*` operator.