Cargo is not applicable when using a toolchain specified in rust-toolchain.toml

[sophiajt]

Problem

I'm experiencing an issue very similar to #3025

In Nushell, we currently use this in our rust-toolchain.toml:

[toolchain]
profile = "default"
channel = "1.64.0"

On my mac, this is now broken:

❯ cargo install --path . --features=extra
error: the 'cargo' binary, normally provided by the 'cargo' component, is not applicable to the '1.64.0-aarch64-apple-darwin' toolchain

Strangely enough, if I change channel = "1.64.0" to channel = "1.64" it fixes the issue but breaks other platforms. It almost seems like there's a naming issue that got published.

Steps

1. Described above

Possible Solution(s)

It should be possible to use rust-toolchain.toml to request an earlier version of the Rust compiler using the full version number across platforms.

Notes

No response

Rustup version

rustup 1.25.1 (bb60b1e89 2022-07-12)
info: This is the version for the rustup toolchain manager, not the rustc compiler.
info: The currently active `rustc` version is `rustc 1.64.0 (a55dd71d5 2022-09-19)`

Installed toolchains

❯ rustup show
Default host: aarch64-apple-darwin
rustup home:  /Users/jt/.rustup

installed toolchains
--------------------

stable-aarch64-apple-darwin (default)
nightly-2022-01-20-aarch64-apple-darwin
nightly-2022-10-20-aarch64-apple-darwin
nightly-aarch64-apple-darwin
1.64-aarch64-apple-darwin
1.56.0-aarch64-apple-darwin
1.61.0-aarch64-apple-darwin
1.63.0-aarch64-apple-darwin
1.64.0-aarch64-apple-darwin

active toolchain
----------------

1.64.0-aarch64-apple-darwin (overridden by '/Users/jt/Source/nushell/rust-toolchain.toml')
rustc 1.64.0 (a55dd71d5 2022-09-19)

[joii2020]

I also encountered a similar problem, throughrustup uninstall nightly-aarch64-apple-darwin and rustup install nightly-aarch64-apple-darwin can solve the problem.
I guess because I need to switch between x86_64 and arm frequently, but CARGO_HOME uses the same.

[sambrightman]

Potentially some connection to #3061? Or at least the workaround seems connected.

[L-M-Sherlock]

Same problem:

info: syncing channel updates for '1.72-aarch64-apple-darwin'
info: latest update on 2023-08-24, rust version 1.72.0 (5680fa18f 2023-08-23)
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'
error: the 'cargo' binary, normally provided by the 'cargo' component, is not applicable to the '1.72-aarch64-apple-darwin' toolchain

It occurs when channel = "1.72". I solved it via setting channel = "1.72.0".

[rbtcollins]

It occurs when channel = "1.72". I solved it via setting channel = "1.72.0".

This may indicate a problem with the major.minor channel aliases. @pietroalbini I think you know about the setup of those? (If not, can you point me at the right place to enquire).

[ashsajal1]

Use stable-gnu toolchain.
rustup toolchain install stable-gnu

then
rustup default stable-x86_64-pc-windows-gnu

ref : https://rust-lang.github.io/rustup/installation/windows.html

[rami3l]

Looks like the problem is still there with the 1.79 channel (#3953)?

@jdno There shouldn't be a fundamental difference between the two manifests (1.79 and 1.79.0), right?

Update: Just tried on my own Mac and nothing happens:

> rustup --version
rustup 1.27.1+366 (4149df642 2024-07-15)
info: This is the version for the rustup toolchain manager, not the rustc compiler.
info: The currently active `rustc` version is `rustc 1.79.0 (129f3b996 2024-06-10)`

> rustup toolchain install 1.79
info: syncing channel updates for '1.79-aarch64-apple-darwin'
info: latest update on 2024-06-13, rust version 1.79.0 (129f3b996 2024-06-10)
info: downloading component 'cargo'
  6.4 MiB /   6.4 MiB (100 %)   1.2 MiB/s in  7s         
info: downloading component 'clippy'
  2.2 MiB /   2.2 MiB (100 %) 622.8 KiB/s in  2s         
info: downloading component 'rust-docs'
 15.4 MiB /  15.4 MiB (100 %)   5.2 MiB/s in  3s         
info: downloading component 'rust-std'
 22.7 MiB /  22.7 MiB (100 %)   6.4 MiB/s in  4s         
info: downloading component 'rustc'
 50.9 MiB /  50.9 MiB (100 %)   9.4 MiB/s in  7s         
info: downloading component 'rustfmt'
info: installing component 'cargo'
info: installing component 'clippy'
info: installing component 'rust-docs'
 15.4 MiB /  15.4 MiB (100 %)   3.8 MiB/s in  2s         
info: installing component 'rust-std'
 22.7 MiB /  22.7 MiB (100 %)  20.0 MiB/s in  1s         
info: installing component 'rustc'
 50.9 MiB /  50.9 MiB (100 %)  22.9 MiB/s in  2s         
info: installing component 'rustfmt'

  1.79-aarch64-apple-darwin installed - rustc 1.79.0 (129f3b996 2024-06-10)

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

> rustup toolchain install 1.79.0
info: syncing channel updates for '1.79.0-aarch64-apple-darwin'
info: latest update on 2024-06-13, rust version 1.79.0 (129f3b996 2024-06-10)
info: downloading component 'cargo'
  6.4 MiB /   6.4 MiB (100 %)   3.0 MiB/s in  3s         
info: downloading component 'clippy'
  2.2 MiB /   2.2 MiB (100 %) 751.4 KiB/s in  2s         
info: downloading component 'rust-docs'
 15.4 MiB /  15.4 MiB (100 %)   1.1 MiB/s in 23s          
info: downloading component 'rust-std'
 22.7 MiB /  22.7 MiB (100 %)   4.1 MiB/s in  7s         
info: downloading component 'rustc'
 50.9 MiB /  50.9 MiB (100 %)   6.4 MiB/s in 10s             
info: downloading component 'rustfmt'
  1.6 MiB /   1.6 MiB (100 %) 737.6 KiB/s in  2s         
info: installing component 'cargo'
info: installing component 'clippy'
info: installing component 'rust-docs'
 15.4 MiB /  15.4 MiB (100 %)   4.0 MiB/s in  2s         
info: installing component 'rust-std'
 22.7 MiB /  22.7 MiB (100 %)  21.1 MiB/s in  1s         
info: installing component 'rustc'
 50.9 MiB /  50.9 MiB (100 %)  23.1 MiB/s in  2s         
info: installing component 'rustfmt'

  1.79.0-aarch64-apple-darwin installed - rustc 1.79.0 (129f3b996 2024-06-10)

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

This could also be an error specific to toolchain files, but I doubt about it...

@Rigidity can you see your cargo under ~/.rustup/toolchains/*/bin for both versions? If so, that might indicate an internal error within Rustup. Thanks!

[Rigidity]

This is bizarre, I can't reproduce it no matter what I do now. I see cargo in both and it works with 1.79 in the toolchain now.
I tried reinstalling multiple times before and couldn't get anything to work, so this is pretty strange...
I'll let you know if I run into it again I guess

[rami3l]

This is bizarre, I can't reproduce it no matter what I do now. I see cargo in both and it works with 1.79 in the toolchain now. I tried reinstalling multiple times before and couldn't get anything to work, so this is pretty strange... I'll let you know if I run into it again I guess

@Rigidity Thanks for letting me know! 👀 In that case I'll put this into #3937 then...

FWIW our mitigation in #3635, once completed, should address this problem for you for about 70% of the time.

[Rigidity]

I think it might be worth noting that the original issue also coincided with an error saying something like "Could not copy downloaded file to path " when I tried to (re)install 1.79 manually. I'm guessing that it was trying to download Cargo and since it already existed in the destination directory (maybe it was picking the wrong one out of the two?) it failed.

So could have been some sort of corruption or race condition.

[djc]

@rami3l could you give this issue a better title?