mruby/mruby — pull request #836 by akiray03 (2013-02-11 12:05:38+00:00)
Title: string contains null byte check utility function (mrb_str_to_cstr)

see also
- http://www.ruby-lang.org/en/news/2012/10/12/poisoned-NUL-byte-vulnerability/
- iij/mruby's issue https://github.com/iij/mruby/issues/38