背景
ある日 rustup update を実行したら以下のエラーが発生しました。
$ rustup update
info: syncing channel updates for 'stable-aarch64-apple-darwin'
info: latest update on 2025-05-15, rust version 1.87.0 (17067e9ac 2025-05-09)
error: component 'rls-preview' for target 'aarch64-apple-darwin' is unavailable for download for channel 'stable'
error: One or many components listed above might have been permanently removed from newer versions
error: of the official Rust distribution due to deprecation.
error:
error: You can find the list of removed components at
error: <https://rust-lang.github.io/rustup/devel/concepts/components.html#previous-components>.
error:
error: If you are updating an existing toolchain, after determining the deprecated component(s)
error: in question, please remove them with a command such as:
error:
error: rustup component remove --toolchain stable <COMPONENT>...
error:
error: After that, you should be able to continue with the update as usual.
stable-aarch64-apple-darwin update failed - rustc 1.86.0 (05f9846f8 2025-03-31)
info: cleaning up downloads & tmp directories
info: self-update is disabled for this build of rustup
info: any updates to rustup will need to be fetched with your system package manager
Issuesを探してみると、以下のページがヒット。
元々 rls 自体は2022年に非推奨となっていたのが、1.87.0からエラーになるようになった？と予想されます。
というわけで、rls-previewコンポーネントを削除することに。
対応内容
インストールされているrustupコンポーネントの一覧を確認します。
$ rustup component list --installed
cargo-aarch64-apple-darwin
clippy-aarch64-apple-darwin
rls-aarch64-apple-darwin
rust-analysis-aarch64-apple-darwin
rust-src
rust-std-aarch64-apple-darwin
rust-std-aarch64-unknown-linux-gnu
rust-std-aarch64-unknown-linux-musl
rust-std-wasm32-unknown-unknown
rust-std-wasm32-wasip2
rust-std-x86_64-unknown-linux-gnu
rust-std-x86_64-unknown-linux-musl
rustc-aarch64-apple-darwin
rustfmt-aarch64-apple-darwin
rls-aarch64-apple-darwin 辺りが怪しそう。
冒頭のエラーメッセージの内容に従って rls-preview を削除します。
rustup component remove --toolchain stable rls-preview
コンポーネント一覧を確認します。
$ rustup component list --installed
cargo-aarch64-apple-darwin
clippy-aarch64-apple-darwin
rust-analysis-aarch64-apple-darwin
rust-src
rust-std-aarch64-apple-darwin
rust-std-aarch64-unknown-linux-gnu
rust-std-aarch64-unknown-linux-musl
rust-std-wasm32-unknown-unknown
rust-std-wasm32-wasip2
rust-std-x86_64-unknown-linux-gnu
rust-std-x86_64-unknown-linux-musl
rustc-aarch64-apple-darwin
rustfmt-aarch64-apple-darwin
rls 関連のコンポーネントが削除されていますね。
改めて rustup update を実行します。
$ rustup update
info: syncing channel updates for 'stable-aarch64-apple-darwin'
info: latest update on 2025-05-15, rust version 1.87.0 (17067e9ac 2025-05-09)
info: downloading component 'rust-std' for 'wasm32-wasip2'
21.0 MiB / 21.0 MiB (100 %) 9.5 MiB/s in 3s
info: downloading component 'rust-std' for 'x86_64-unknown-linux-gnu'
info: downloading component 'rust-std' for 'aarch64-unknown-linux-gnu'
info: downloading component 'rust-std' for 'wasm32-unknown-unknown'
info: downloading component 'rust-std' for 'aarch64-unknown-linux-musl'
info: downloading component 'rust-std' for 'x86_64-unknown-linux-musl'
info: downloading component 'rust-src'
info: downloading component 'rust-analysis'
info: downloading component 'cargo'
info: downloading component 'clippy'
info: downloading component 'rust-std'
info: downloading component 'rustc'
info: downloading component 'rustfmt'
info: removing previous version of component 'rust-std' for 'wasm32-wasip2'
info: removing previous version of component 'rust-std' for 'x86_64-unknown-linux-gnu'
info: removing previous version of component 'rust-std' for 'aarch64-unknown-linux-gnu'
info: removing previous version of component 'rust-std' for 'wasm32-unknown-unknown'
info: removing previous version of component 'rust-std' for 'aarch64-unknown-linux-musl'
info: removing previous version of component 'rust-std' for 'x86_64-unknown-linux-musl'
info: removing previous version of component 'rust-src'
info: removing previous version of component 'rust-analysis'
info: removing previous version of component 'cargo'
info: removing previous version of component 'clippy'
info: removing previous version of component 'rust-std'
info: removing previous version of component 'rustc'
info: removing previous version of component 'rustfmt'
info: installing component 'rust-std' for 'wasm32-wasip2'
21.0 MiB / 21.0 MiB (100 %) 19.1 MiB/s in 2s
info: installing component 'rust-std' for 'x86_64-unknown-linux-gnu'
29.4 MiB / 29.4 MiB (100 %) 15.8 MiB/s in 1s
info: installing component 'rust-std' for 'aarch64-unknown-linux-gnu'
28.0 MiB / 28.0 MiB (100 %) 18.8 MiB/s in 1s
info: installing component 'rust-std' for 'wasm32-unknown-unknown'
19.6 MiB / 19.6 MiB (100 %) 19.4 MiB/s in 1s
info: installing component 'rust-std' for 'aarch64-unknown-linux-musl'
24.9 MiB / 24.9 MiB (100 %) 19.1 MiB/s in 1s
info: installing component 'rust-std' for 'x86_64-unknown-linux-musl'
37.9 MiB / 37.9 MiB (100 %) 19.1 MiB/s in 2s
info: installing component 'rust-src'
info: installing component 'rust-analysis'
info: installing component 'cargo'
info: installing component 'clippy'
info: installing component 'rust-std'
27.0 MiB / 27.0 MiB (100 %) 19.2 MiB/s in 1s
info: installing component 'rustc'
60.4 MiB / 60.4 MiB (100 %) 19.8 MiB/s in 3s
info: installing component 'rustfmt'
stable-aarch64-apple-darwin updated - rustc 1.87.0 (17067e9ac 2025-05-09) (from rustc 1.86.0 (05f9846f8 2025-03-31))
info: cleaning up downloads & tmp directories
info: self-update is disabled for this build of rustup
info: any updates to rustup will need to be fetched with your system package manager
今度は無事Rustの最新版をインストールすることができました！
めでたしめでたし。
参考URL