Stream: wit-bindgen

Topic: new wit_bindgen_rt undeclared crate error

Gareth (Mar 07 2024 at 22:55):

Hi, I wonder if anybody can help. I have a project using wasi-nn onnx that is built via github actions. It uses
wit-bindgen = { version = "0.16.0", default-features = false, features = ["realloc"] }
and has been compiling fine via a gh workflow with no changes to the code base. I am using caching as part of the build action.
Recently I have run the build without the cache and now it will not build with the following compile error relating to bindings:

16450 | pub(crate) use __export_classify_impl as export;
      |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error[E0433]: failed to resolve: use of undeclared crate or module `wit_bindgen_rt`
     --> src/bindings.rs:16803:5
      |
16803 |     wit_bindgen_rt::maybe_link_cabi_realloc();
      |     ^^^^^^^^^^^^^^ use of undeclared crate or module `wit_bindgen_rt`
      |
help: there is a crate or module with a similar name
      |
16803 |     wit_bindgen::maybe_link_cabi_realloc();
      |     ~~~~~~~~~~~

The reason I have been using an earlier version of wit-bindgen was to utilise this unmerged wasi-nn onnx PR:
https://github.com/bytecodealliance/wasmtime/pull/7691/files#diff-621d8d857c5c84c6449bb6737193b5a3abc47a3e0c4a79a736bfc463570375a7

I am not sure when the error reference to wit_bindgen_rt has appeared as I have not seen this before, I have tried adding wit_bindgen_rt version 0.21.0 to Cargo.toml, however it results in new errors relating to my wit versions:
error: failed to validate exported interface wasi:cli/run@0.2.0-rc-2023-12-05` which are earlier than the currently released version.

Any advice on the best way to go about resolving this would be much appreciated :)

Alex Crichton (Mar 07 2024 at 23:21):

It seems like you're using cargo component, and you might need to hold back or install an older version of cargo-component perhaps if you want the same build from before to work.

@Peter Huene may know more though.

If you can share a bit more about how to reproduce with a repo or CI log or similar we can help some more too

Peter Huene (Mar 07 2024 at 23:24):

@Gareth what version of cargo-component are you using and did it change?

Gareth (Mar 08 2024 at 09:56):

Alex Crichton said:

It seems like you're using cargo component, and you might need to hold back or install an older version of cargo-component perhaps if you want the same build from before to work.

Peter Huene may know more though.

If you can share a bit more about how to reproduce with a repo or CI log or similar we can help some more too

Thanks both, I reverted to explicitly using cargo component version 0.8.0 and it built successfully again :)

Last updated: Dec 23 2024 at 12:05 UTC