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_This is an English translation of [Matz's blog post][matz blog post]
written in Japanese._
_Some parts are updated to reflect recent changes._
-[matz blog post]: http://www.rubyist.net/~matz/20130731.html
+[matz blog post]: https://www.rubyist.net/~matz/20130731.html
When you are extending mruby using C language, you may encounter
mysterious "arena overflow error" or memory leak or very slow