ruby関係のコマンドを入力すると常にエラー？警告？が出る

Question

ruby,rails,irb,gemのどのコマンドを実行しても以下のエラー？がでます。

Ignoring bindex-0.5.0 because its extensions are not built. Try: gem pristine bindex --version 0.5.0
Ignoring byebug-10.0.1 because its extensions are not built. Try: gem pristine byebug --version 10.0.1
Ignoring byebug-10.0.0 because its extensions are not built. Try: gem pristine byebug --version 10.0.0
Ignoring byebug-9.1.0 because its extensions are not built. Try: gem pristine byebug --version 9.1.0
Ignoring byebug-9.0.6 because its extensions are not built. Try: gem pristine byebug --version 9.0.6
Ignoring debase-0.2.2 because its extensions are not built. Try: gem pristine debase --version 0.2.2
Ignoring debase-0.2.2.beta14 because its extensions are not built. Try: gem pristine debase --version 0.2.2.beta14
Ignoring ffi-1.9.23 because its extensions are not built. Try: gem pristine ffi --version 1.9.23
Ignoring ffi-1.9.18 because its extensions are not built. Try: gem pristine ffi --version 1.9.18
Ignoring json-2.1.0 because its extensions are not built. Try: gem pristine json --version 2.1.0
Ignoring nio4r-2.2.0 because its extensions are not built. Try: gem pristine nio4r --version 2.2.0
Ignoring nokogiri-1.8.1 because its extensions are not built. Try: gem pristine nokogiri --version 1.8.1
Ignoring puma-3.11.3 because its extensions are not built. Try: gem pristine puma --version 3.11.3
Ignoring puma-3.11.2 because its extensions are not built. Try: gem pristine puma --version 3.11.2
Ignoring puma-3.9.1 because its extensions are not built. Try: gem pristine puma --version 3.9.1
Ignoring ruby-debug-ide-0.6.1.beta12 because its extensions are not built. Try: gem pristine ruby-debug-ide --version 0.6.1.beta12
Ignoring sqlite3-1.3.13 because its extensions are not built. Try: gem pristine sqlite3 --version 1.3.13

試しにこれを実行しても

gem pristine bindex --version 0.5.0

これがでます。

ERROR:  While executing gem ... (Gem::Exception)
    Failed to find gems ["bindex"] = 0.5.0

Answer 1

gem environment

の

- GEM PATHS:

のディレクトリを全部消して
パッケージマネージャでrubyをアンインストールしてインストールしたらなおった