[英]Rails cannot install gem 'unf'
每当我尝试: $ gem install unf
,我都会收到此错误:
ERROR: While executing gem ... (NoMethodError)
undefined method `spec' for nil:NilClass
我什至尝试添加这些库
sudo apt-get install build-essential openssl libreadline6 libreadline6-dev curl git-core zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-0 libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev ncurses-dev automake libtool bison
但没有雪茄,知道我该怎么做吗?
sudo REALLY_GEM_UPDATE_SYSTEM=TRUE gem update --system
工作
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