merge revision(s) 43853: [Backport #9157]
* file.c (rb_readlink): fix buffer overflow on a long symlink. since rb_str_modify_expand() expands from its length but not its capacity, need to set the length properly for each expansion. [ruby-core:58592] [Bug #9157]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@43959 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 43853: [Backport #9157]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@43959 b2dd03c8-39d4-4d8f-98ff-823fe69b080e