* regparse.c (fetch_token_in_cc): raise error if given octal escaped
	  character is too big. [Bug #12420] [Bug #12423]

	* re.c (unescape_nonascii): scan hex up to only 3 characters.
	  [Bug #12420] [Bug #12423]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@55458 b2dd03c8-39d4-4d8f-98ff-823fe69b080e