cargo-fmt reports weird version on nightly

[Kobzol]

$ rustup update nightly
$ cd .rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin
$ ./cargo-fmt --version
rustfmt 1.8.0-stable (4d91de4e48 2025-02-17)
$ ./rustfmt --version
rustfmt 1.8.0-nightly (85abb27636 2025-02-25)

The version has a different date than rustfmt, which I would perhaps understand, but it's a bit weird that it says -stable even though it's in the nightly toolchain.

It's possible that #137541 might fix this, we'll see after the next nightly is released.

[onur-ozkan]

I did a quick check, #137541 doesn't fix this.

[onur-ozkan]

Clippy doesn't have this problem. Since both tools share common implementations I assume there might be some internal logic in src/tools/rustfmt.

[xizheyin]

It has been fixed?

xxxxxx:~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin$ ./cargo-fmt --version
rustfmt 1.8.0-nightly (30f168ef81 2025-03-05)
xxxxxx:~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin$ ./rustfmt --version
rustfmt 1.8.0-nightly (30f168ef81 2025-03-05)

[Kobzol]

I still see this:

~/.rustup$ ./toolchains/nightly-x86_64-unknown-linux-gnu/bin/cargo-fmt --version
rustfmt 1.8.0-stable (4d91de4e48 2025-02-17)

[xizheyin]

Try to update the nightly? rustup toolchain update nightly
It seems to be old version nightly.

xxxxxxx:~/rust$ rustup toolchain update nightly
info: syncing channel updates for 'nightly-x86_64-unknown-linux-gnu'

  nightly-x86_64-unknown-linux-gnu unchanged - rustc 1.87.0-nightly (30f168ef8 2025-03-05)

info: checking for self-update

[Kobzol]

No it is updated :) That's why it's super weird. I also removed the toolchain and reinstalled it.

~$ ~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/cargo-fmt --version
rustfmt 1.8.0-stable (4d91de4e48 2025-02-17)
~$ ~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/rustfmt --version
rustfmt 1.8.0-nightly (30f168ef81 2025-03-05)

I even tried a pinned nightly (2025-03-01) which doesn't have any extra components, where the same thing happens.

[xizheyin]

The code is here. It seems that RUSTFMT is incorrect.

[onur-ozkan]

I tried it just now and it seems to be working as expected:

$  ~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin  $ ./rustfmt --version
rustfmt 1.8.0-nightly (414482f6a0 2025-05-13)
$  ~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin  $ ./cargo-fmt --version
rustfmt 1.8.0-nightly (414482f6a0 2025-05-13)

[Kobzol]

~$ ~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/rustfmt --version
rustfmt 1.8.0-nightly (414482f6a0 2025-05-13)
~$ ~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/bin/cargo-fmt --version
rustfmt 1.8.0-stable (05f9846f89 2025-03-31)

Not sure why is there a difference between your and my environment :/

[onur-ozkan]

lol this is weird

[onur-ozkan]

I found the problem and explained it in the fix PR.