[ruby-cvs:54371] nagachika:r47223 (ruby_2_1): merge r46831 partially. extracted commits are as follows.

[nagachika at ruby-lang.org]

nagachika	2014-08-20 00:03:26 +0900 (Wed, 20 Aug 2014)

  New Revision: 47223

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=47223

  Log:
    merge r46831 partially. extracted commits are as follows.
    https://github.com/k-takata/Onigmo/commit/b9fba1dc63ccb42a86e934011b468e6022fabb74
    https://github.com/k-takata/Onigmo/commit/c1fc76b9bd463948ffc5058bc352bf93732f0314
    https://github.com/k-takata/Onigmo/commit/a0efc0a200f7108ca3d5ac3039c8f952e0051619
    https://github.com/k-takata/Onigmo/commit/c7cda4ed5676167b0d01bb5555724f6164fbdb13
    [Bug #8716]
    
    * include/ruby/oniguruma.h (ONIG_MAX_CAPTURE_GROUP_NUM,
      ONIGERR_TOO_MANY_CAPTURE_GROUPS): add cheking the number of capture
      groups.
    
    * regerror.c (onig_error_code_to_format): ditto.
    
    * regparse.c (scan_env_add_mem_entry): ditto.
    
    * regexec.c (onig_region_copy, match_at): fix: segmation fault occurs
      when many groups are used.

  Modified files:
    branches/ruby_2_1/ChangeLog
    branches/ruby_2_1/include/ruby/oniguruma.h
    branches/ruby_2_1/regerror.c
    branches/ruby_2_1/regexec.c
    branches/ruby_2_1/regparse.c
    branches/ruby_2_1/version.h