仍然有这个错误,这个文件确实是存在的
~ → gem sources --add https://ruby.taobao.org/ -V
GET https://ruby.taobao.org/specs.4.8.gz 302 Moved Temporarily Error fetching https://ruby.taobao.org/: no such name (https://ruby.taobao.org/specs.4.8.gz)