Beta breaks my project: module resolution (?)

[maghoff]

The CI build of my project Sausagewiki has started failing with the beta compiler channel. See the build log output:

error[E0433]: failed to resolve. Use of undeclared type or module `articles`
   --> src/state.rs:326:22
    |
326 |             #[derive(Insertable)]
    |                      ^^^^^^^^^^ Use of undeclared type or module `articles`

It still builds with the stable compiler, so this unfortunately looks like a regression in rustc.

This project makes substantial use of code generation in build.rs and with procedural derive macros.

[petrochenkov]

This is most likely a consequence of #51952 and the error originates in diesel_derives.

It's strange however that this specific case is reported as an error and not as a lint warning (like many other warnings that can be seen in the log).

The issue is already fixed on diesel master, so perhaps switching to it will help as a workaround.

[maghoff]

Thanks for the feedback :)

I tried to see if I could get the problems to disappear with [patch]-ing the diesel dependencies in my Cargo.toml, but gave up after not managing to make it work. In other words, I was unable to apply the workaround. It doesn't matter much in the end as I have no particular use for it working in with the beta compiler.

However, I am very interested in my project not breaking with the stable compiler in the future :) I hope it will not be necessary for me to change anything for this to be the case.

[petrochenkov]

Fixed in #53516

[maghoff]

I can verify that my project now builds successfully with the beta channel.