Couldn't compile : "Couldn't find 'write' in core" after some update.

[regular-dev]

Hello, i tried to compile my ml library that uses ocl as dependency but got an error related ocl crate. Then i decided to build single ocl from github and got the same error log:

Compiling ocl v0.19.4 (/tmp/ocl/ocl)
error[E0433]: failed to resolve: could not find `write` in `core`
  --> ocl/src/error.rs:19:17
   |
19 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `write` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `write` in `core`
  --> ocl/src/standard/buffer.rs:38:17
   |
38 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `write` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `write` in `core`
  --> ocl/src/standard/device.rs:14:17
   |
14 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `write` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `write` in `core`
  --> ocl/src/standard/kernel.rs:27:17
   |
27 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `write` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `write` in `core`
  --> ocl/src/standard/platform.rs:16:17
   |
16 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `write` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `write` in `core`
  --> ocl/src/standard/spatial_dims.rs:10:17
   |
10 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `write` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `option` in `core`
  --> ocl/src/error.rs:19:17
   |
19 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `option` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `fmt` in `core`
  --> ocl/src/error.rs:19:17
   |
19 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `fmt` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `convert` in `core`
  --> ocl/src/error.rs:19:17
   |
19 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `convert` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `option` in `core`
  --> ocl/src/standard/buffer.rs:38:17
   |
38 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `option` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `fmt` in `core`
  --> ocl/src/standard/buffer.rs:38:17
   |
38 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `fmt` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `convert` in `core`
  --> ocl/src/standard/buffer.rs:38:17
   |
38 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `convert` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `fmt` in `core`
  --> ocl/src/standard/device.rs:14:17
   |
14 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `fmt` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `fmt` in `core`
  --> ocl/src/standard/kernel.rs:27:17
   |
27 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `fmt` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `fmt` in `core`
  --> ocl/src/standard/platform.rs:16:17
   |
16 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `fmt` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `fmt` in `core`
  --> ocl/src/standard/spatial_dims.rs:10:17
   |
10 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `fmt` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0433]: failed to resolve: could not find `option` in `core`
  --> ocl/src/error.rs:19:17
   |
19 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `option` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing one of these items
   |
4  + use core::option::Option;
   |
4  + use crate::error::std::option::Option;
   |
4  + use std::option::Option;
   |
help: if you import `Option`, refer to it directly
   |
19 | #[derive(Debug, thiserror::Error)]
   |

error[E0433]: failed to resolve: could not find `option` in `core`
  --> ocl/src/standard/buffer.rs:38:17
   |
38 | #[derive(Debug, thiserror::Error)]
   |                 ^^^^^^^^^^^^^^^^ could not find `option` in `core`
   |
   = note: this error originates in the derive macro `thiserror::Error` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing one of these items
   |
3  + use core::option::Option;
   |
3  + use crate::standard::buffer::std::option::Option;
   |
3  + use std::option::Option;
   |
help: if you import `Option`, refer to it directly
   |
38 | #[derive(Debug, thiserror::Error)]`

rustc 1.72.1 (d5c2e9c34 2023-09-13)

So I guess there is a problem from ocl crate. Three months ago everything compiled fine. Thanks!

[ybh1998]

I'm also encountering this issue. I think this may be related to ocl-core shadowing core. https://github.com/rust-lang/rust/issues/90960

[ybh1998]

I found this error was caused by a breaking change of dependency thiserror v1.0.49. commit: https://github.com/dtolnay/thiserror/commit/f0f303a7bac9e65f9a0664141f58da9b78f21927

I can temporarily solve this issue by cargo update -p thiserror --precise 1.0.48

Maybe it's better to solve this problem in this repo? Like expand all core to full name ocl_core in https://github.com/cogciprocate/ocl/blob/3d0c52bfa75146a14b16c55e799825ad52f1f19e/ocl/src/lib.rs#L53C35-L53C35

[regular-dev]

I found this error was caused by a breaking change of dependency thiserror v1.0.49. commit: dtolnay/thiserror@f0f303a

I can temporarily solve this issue by cargo update -p thiserror --precise 1.0.48

Maybe it's better to solve this problem in this repo? Like expand all core to full name ocl_core in https://github.com/cogciprocate/ocl/blob/3d0c52bfa75146a14b16c55e799825ad52f1f19e/ocl/src/lib.rs#L53C35-L53C35

Thanks for temporary solution. I am not very familar with ocl codebase, so waiting for maintainer or nice people's PR.

[c0gent]

Fixed in 0.19.5 by setting thiserror version to 1.0.48.

We can re-alias ocl-core at some point in the future if needed.

[AdrianEddy]

We can re-alias ocl-core at some point in the future if needed.

I think that would be a better solution. Currently we can't use any other version of thiserror in our apps when using ocl, since there's an failed to select a version for "thiserror" error then

[c0gent]

Sounds good.

Do you know why this is? Seems strange that there should be a conflict like that.

[AdrianEddy]

@c0gent fix here: https://github.com/cogciprocate/ocl/pull/225