merge revision(s) 55427: [Backport #12503]
* string.c (tr_trans): consider terminator length and fix heap overflow. reported by Guido Vranken <guido AT guidovranken.nl>.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@55561 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 55427: [Backport #12503]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@55561 b2dd03c8-39d4-4d8f-98ff-823fe69b080e