Why does rustc automatically downgrade its version?

Question

I was trying to upgrade rust. I tried uninstalling (1.60.0) and reinstalling. The new version is 1.73.0. But when I ran rustc it automatically downloaded 1.60.0 and reverted to 1.60.0. Wonder how can I force it to use the new version?

info: profile set to 'default'
info: default host triple is aarch64-apple-darwin
info: syncing channel updates for 'stable-aarch64-apple-darwin'
info: latest update on 2023-10-05, rust version 1.73.0 (cc66ad468 2023-10-03)
info: downloading component 'cargo'
info: downloading component 'clippy'
info: downloading component 'rust-docs'
info: downloading component 'rust-std'
info: downloading component 'rustc'
 54.4 MiB /  54.4 MiB (100 %)  27.7 MiB/s in  2s ETA:  0s
info: downloading component 'rustfmt'
info: installing component 'cargo'
info: installing component 'clippy'
info: installing component 'rust-docs'
 13.8 MiB /  13.8 MiB (100 %)   5.5 MiB/s in  1s ETA:  0s
info: installing component 'rust-std'
 24.5 MiB /  24.5 MiB (100 %)  21.1 MiB/s in  1s ETA:  0s
info: installing component 'rustc'
 54.4 MiB /  54.4 MiB (100 %)  23.3 MiB/s in  2s ETA:  0s
info: installing component 'rustfmt'
info: default toolchain set to 'stable-aarch64-apple-darwin'

  stable-aarch64-apple-darwin installed - rustc 1.73.0 (cc66ad468 2023-10-03)


Rust is installed now. Great!

To get started you may need to restart your current shell.
This would reload your PATH environment variable to include
Cargo's bin directory ($HOME/.cargo/bin).

To configure your current shell, run:
source "$HOME/.cargo/env"

(base) % rustc -V
info: syncing channel updates for '1.60.0-aarch64-apple-darwin'
info: latest update on 2022-04-07, rust version 1.60.0 (7737e0b5c 2022-04-04)
info: downloading component 'cargo'
info: downloading component 'clippy'
info: downloading component 'rust-docs'
info: downloading component 'rust-std'
info: downloading component 'rustc'
info: downloading component 'rustfmt'
info: installing component 'cargo'
info: installing component 'clippy'
info: installing component 'rust-docs'
info: installing component 'rust-std'
info: installing component 'rustc'
info: installing component 'rustfmt'
rustc 1.60.0 (7737e0b5c 2022-04-04)

There is very likely a rustup version override in the environment or on the directory where you ran rustc -V — cafce25
– cafce25, Commented Oct 6, 2023 at 14:04

user9614249 · Accepted Answer · 2023-10-06 14:21:31Z

4

There are a few ways rust could be forced to using a specific compiler version (overrides)

1. The RUSTUP_TOOLCHAIN environment variable

2. A Directory override

Directories can be assigned their own Rust toolchain with rustup override. When a directory has an override then any time rustc or cargo is run inside that directory, or one of its child directories, the override toolchain will be invoked.

The per-directory overrides are stored in a configuration file in rustup's home directory.

To see the active toolchain use rustup show and rustup override unset to remove it.

3. The toolchain file

(rust-toolchain.toml or rust-toolchain) can set a specific Rust version.

For example

[toolchain]
channel = "nightly-2020-07-10"
...

4. The default version can be set directly.

Use rustup default to view the default global toolchain.

answered Oct 6, 2023 at 14:21

user9614249

Sign up to request clarification or add additional context in comments.

1 Comment

Justin Zhang Over a year ago

Thanks, in my case, it turns out to be 3. There is a rust-toolchain.toml in the parent directory.

Collectives™ on Stack Overflow

Why does rustc automatically downgrade its version?

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related