Rust / Test SIMD Ci test failing when compiling using packed_simd

[alamb]

Describe the bug
Rust / Test SIMD Ci test began failing on active_release (and I suspect that it would fail on master as well)

@nevi-me suggests #750 (comment) that these CI failures seem to be related to a packed_simd_2 release from 15 hours ago

Here is a test PR to master with no code changes showing the issue #765 -- the failure is in https://github.com/apache/arrow-rs/pull/750/checks?check_run_id=3567651549.

Example failures:
https://github.com/apache/arrow-rs/pull/750/checks?check_run_id=3567651549

  Compiling bstr v0.2.16
error: type parameters must be declared prior to const parameters
  --> /github/home/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:20:54
   |
20 | pub unsafe fn __shuffle_vector2<const IDX: [u32; 2], T, U>(x: T, y: T) -> U
   |                                ----------------------^--^- help: reorder the parameters: lifetimes, then types, then consts: `<T, U, const IDX: [u32; 2]>`

error: type parameters must be declared prior to const parameters
  --> /github/home/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:30:54
   |
30 | pub unsafe fn __shuffle_vector4<const IDX: [u32; 4], T, U>(x: T, y: T) -> U
   |
   = note: the only supported types are integers, `bool` and `char`
   = help: more complex types are supported with `#![feature(const_generics)]`

error: `[u32; 16]` is forbidden as the type of a const generic parameter
  --> /github/home/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:50:45
   |
50 | pub unsafe fn __shuffle_vector16<const IDX: [u32; 16], T, U>(x: T, y: T) -> U
   |                                             ^^^^^^^^^
   |
   = note: the only supported types are integers, `bool` and `char`
   = help: more complex types are supported with `#![feature(const_generics)]`

error: `[u32; 32]` is forbidden as the type of a const generic parameter
  --> /github/home/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:60:45
   |
60 | pub unsafe fn __shuffle_vector32<const IDX: [u32; 32], T, U>(x: T, y: T) -> U
   |                                             ^^^^^^^^^
   |
   = note: the only supported types are integers, `bool` and `char`
   = help: more complex types are supported with `#![feature(const_generics)]`

error: `[u32; 64]` is forbidden as the type of a const generic parameter
  --> /github/home/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:70:45
   |
70 | pub unsafe fn __shuffle_vector64<const IDX: [u32; 64], T, U>(x: T, y: T) -> U
   |                                             ^^^^^^^^^
   |
   = note: the only supported types are integers, `bool` and `char`
   = help: more complex types are supported with `#![feature(const_generics)]`

error: aborting due to 12 previous errors

error: could not compile `packed_simd_2`

To Reproduce
Make a new PR without any code changes:

Expected behavior
Clean CI run ;)

Additional context
First seen by @nevi-me and @matthewmturner on #750

[jorgecarleitao]

I do not have a dev env with me here, freeze nightly to nightly-2021-08-30 and relax the version to 0.3 as in here: https://github.com/jorgecarleitao/arrow2/pull/364/files. See also rust-lang/packed_simd#328

[jorgecarleitao]

sorry for the noise; this is actually another one(!) I will need to investigate when I get a computer (if someone else does not beat me to it ^_^)

[alamb]

Seems like it is the same as rust-lang/packed_simd#330 (linked to the one you linked @jorgecarleitao ) -- thanks for the pointer

[gangliao]

$ rustup update nightly
info: syncing channel updates for 'nightly-x86_64-unknown-linux-gnu'
  nightly-x86_64-unknown-linux-gnu unchanged - rustc 1.57.0-nightly (2c7bc5e33 2021-09-15)

I have the same issue with the latest nightly rust. Any suggestiion?

[gangliao]

works now

          rustup toolchain install nightly-2021-08-30
          rustup default nightly-2021-08-30

[gangliao]

Still happen in arrow-datafusion ...

cargo build --target x86_64-unknown-linux-gnu --features "simd"

error: type parameters must be declared prior to const parameters
  --> /home/gangliao/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:20:54
   |
20 | pub unsafe fn __shuffle_vector2<const IDX: [u32; 2], T, U>(x: T, y: T) -> U
   |                                ----------------------^--^- help: reorder the parameters: lifetimes, then types, then consts: `<T, U, const IDX: [u32; 2]>`

error: type parameters must be declared prior to const parameters
  --> /home/gangliao/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:30:54
   |
30 | pub unsafe fn __shuffle_vector4<const IDX: [u32; 4], T, U>(x: T, y: T) -> U
   |                                ----------------------^--^- help: reorder the parameters: lifetimes, then types, then consts: `<T, U, const IDX: [u32; 4]>`

error: type parameters must be declared prior to const parameters
  --> /home/gangliao/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:40:54
   |
40 | pub unsafe fn __shuffle_vector8<const IDX: [u32; 8], T, U>(x: T, y: T) -> U
   |                                ----------------------^--^- help: reorder the parameters: lifetimes, then types, then consts: `<T, U, const IDX: [u32; 8]>`

error: type parameters must be declared prior to const parameters
  --> /home/gangliao/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:50:56
   |
50 | pub unsafe fn __shuffle_vector16<const IDX: [u32; 16], T, U>(x: T, y: T) -> U
   |                                 -----------------------^--^- help: reorder the parameters: lifetimes, then types, then consts: `<T, U, const IDX: [u32; 16]>`

error: type parameters must be declared prior to const parameters
  --> /home/gangliao/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:60:56
   |
60 | pub unsafe fn __shuffle_vector32<const IDX: [u32; 32], T, U>(x: T, y: T) -> U
   |                                 -----------------------^--^- help: reorder the parameters: lifetimes, then types, then consts: `<T, U, const IDX: [u32; 32]>`

error: type parameters must be declared prior to const parameters
  --> /home/gangliao/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:70:56
   |
70 | pub unsafe fn __shuffle_vector64<const IDX: [u32; 64], T, U>(x: T, y: T) -> U
   |                                 -----------------------^--^- help: reorder the parameters: lifetimes, then types, then consts: `<T, U, const IDX: [u32; 64]>`

   Compiling inventory-impl v0.1.10
   Compiling ctor v0.1.21
   Compiling typetag-impl v0.1.7
   Compiling async-trait v0.1.51
error: `[u32; 2]` is forbidden as the type of a const generic parameter
  --> /home/gangliao/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:20:44
   |
20 | pub unsafe fn __shuffle_vector2<const IDX: [u32; 2], T, U>(x: T, y: T) -> U
   |                                            ^^^^^^^^
   |
   = note: the only supported types are integers, `bool` and `char`
   = help: more complex types are supported with `#![feature(const_generics)]`

error: `[u32; 4]` is forbidden as the type of a const generic parameter
  --> /home/gangliao/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:30:44
   |
30 | pub unsafe fn __shuffle_vector4<const IDX: [u32; 4], T, U>(x: T, y: T) -> U
   |                                            ^^^^^^^^
   |
   = note: the only supported types are integers, `bool` and `char`
   = help: more complex types are supported with `#![feature(const_generics)]`

error: `[u32; 8]` is forbidden as the type of a const generic parameter
  --> /home/gangliao/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:40:44
   |
40 | pub unsafe fn __shuffle_vector8<const IDX: [u32; 8], T, U>(x: T, y: T) -> U
   |                                            ^^^^^^^^
   |
   = note: the only supported types are integers, `bool` and `char`
   = help: more complex types are supported with `#![feature(const_generics)]`

error: `[u32; 16]` is forbidden as the type of a const generic parameter
  --> /home/gangliao/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:50:45
   |
50 | pub unsafe fn __shuffle_vector16<const IDX: [u32; 16], T, U>(x: T, y: T) -> U
   |                                             ^^^^^^^^^
   |
   = note: the only supported types are integers, `bool` and `char`
   = help: more complex types are supported with `#![feature(const_generics)]`

error: `[u32; 32]` is forbidden as the type of a const generic parameter
  --> /home/gangliao/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:60:45
   |
60 | pub unsafe fn __shuffle_vector32<const IDX: [u32; 32], T, U>(x: T, y: T) -> U
   |                                             ^^^^^^^^^
   |
   = note: the only supported types are integers, `bool` and `char`
   = help: more complex types are supported with `#![feature(const_generics)]`

error: `[u32; 64]` is forbidden as the type of a const generic parameter
  --> /home/gangliao/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/packed_simd_2-0.3.6/src/codegen/llvm.rs:70:45
   |
70 | pub unsafe fn __shuffle_vector64<const IDX: [u32; 64], T, U>(x: T, y: T) -> U
   |                                             ^^^^^^^^^
   |
   = note: the only supported types are integers, `bool` and `char`
   = help: more complex types are supported with `#![feature(const_generics)]`

[gangliao]

Not sure why, but works now.

cargo +nightly build --target x86_64-unknown-linux-gnu --features "simd"