compile error: use of unstable library feature 'stdsimd'

[Anton-4]

Since the latest ahash 0.8.7 release I'm hitting a use of unstable library feature 'stdsimd' on compilation.
We test on several architectures and operating systems and this only occurred on our macos m1 mac mini.

Full error:

 error[E0658]: use of unstable library feature 'stdsimd'
   --> /Users/m1ci/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ahash-0.8.7/src/operations.rs:124:24
    |
124 |     let res = unsafe { vaesmcq_u8(vaeseq_u8(transmute!(value), transmute!(0u128))) };
    |                        ^^^^^^^^^^
    |
    = note: see issue #48556 <https://github.com/rust-lang/rust/issues/48556> for more information

error[E0658]: use of unstable library feature 'stdsimd'
   --> /Users/m1ci/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ahash-0.8.7/src/operations.rs:124:35
    |
124 |     let res = unsafe { vaesmcq_u8(vaeseq_u8(transmute!(value), transmute!(0u128))) };
    |                                   ^^^^^^^^^
    |
    = note: see issue #48556 <https://github.com/rust-lang/rust/issues/48556> for more information

error[E0658]: use of unstable library feature 'stdsimd'
   --> /Users/m1ci/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ahash-0.8.7/src/operations.rs:154:24
    |
154 |     let res = unsafe { vaesimcq_u8(vaesdq_u8(transmute!(value), transmute!(0u128))) };
    |                        ^^^^^^^^^^^
    |
    = note: see issue #48556 <https://github.com/rust-lang/rust/issues/48556> for more information

error[E0658]: use of unstable library feature 'stdsimd'
   --> /Users/m1ci/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ahash-0.8.7/src/operations.rs:154:36
    |
154 |     let res = unsafe { vaesimcq_u8(vaesdq_u8(transmute!(value), transmute!(0u128))) };
    |                                    ^^^^^^^^^
    |
    = note: see issue #48556 <https://github.com/rust-lang/rust/issues/48556> for more information

For more information about this error, try `rustc --explain E0658`.
error: could not compile `ahash` (lib) due to 4 previous errors

[tkaitchuck]

@Amanieu It looks like this is caused by #183
Should I revert it or is there a better way?

[Amanieu]

These functions are stable, are you using an older version of rustc?

[Anton-4]

Oh right, I didn't think to check that. I'm on 1.71.1. Would it be possible to set the required minimum version with the rust-version field in the Cargo.toml? That should provide a nice error message in this case.

[Amanieu]

This was stabilized in 1.72.

[alamb]

Proposed fix #196

[tkaitchuck]

I am attempting to expand the presubmit checks to cover this #197
but so far it is still passing. What combination am I missing?

[alamb]

What combination am I missing?

I left a suggestion: #197 (comment)

[tkaitchuck]

@Anton-4 Can you clearify, you saw this when targeting aarch64-apple-darwin ? What args / rust flags were passed?

[Jefffrey]

For datafusion, the issue came from apache/datafusion#8743

Tagging @Ted-Jiang who reproduced the issue

An example of the dependency datafusion has:

https://github.com/apache/arrow-datafusion/blob/e7cc04db68a05ce9d002de7d0c1be2644bf69c0c/datafusion/common/Cargo.toml#L41-L43

• Located in a few other crates within datafusion too, but is essentially the same (version & features)

[Anton-4]

Can you clearify, you saw this when targeting aarch64-apple-darwin ?

Yes indeed, I'll set up a minimal github repo with a full reproduction.

[Anton-4]

Files for minimal repro:

// rust-toolchain.toml 
[toolchain]
channel = "1.71.1"

// Cargo.toml 
[package]
name = "temp2"
version = "0.1.0"
edition = "2021"

[dependencies]
ahash="=0.8.7"

// src/main.rs 
fn main() {
    println!("Hello, world!");
}

run with cargo build --target=aarch64-apple-darwin.
That produces the error for me on NixOS (x86_64 device) and also on macos 14 (m2 device).