Cargo run error message

help
1

As follows:

Compiling hello v0.1.0 (file:///home/rust/hello)                                   
error[E0658]: mod statements in non-mod.rs files are unstable (see issue #44660)
 --> src/sound.rs:1:9
  |
1 | pub mod instrument;
  |         ^^^^^^^^^^
  |
  = help: on stable builds, rename this file to sound/mod.rs

error: aborting due to previous error

For more information about this error, try `rustc --explain E0658`.
error: Could not compile `hello`.

To learn more, run the command again with --verbose.
I am writing the code according to Separating Modules into Different Files in the official tutorial of the rust compiler language. Why is it wrong?

2

Are you using the 2018 edition? You can check by looking in your Cargo.toml file and seeing if you have a line edition = "2018". What does your file-system look like?

3

hi, welcome on the rust user forum!

I have never seen that error message before. Could you show a ls of you project and of the src folder, plus the content of your Cargo.toml?

4

Do you have the latest version of Rust?

This looks like a message from transitional period before the new modules were made available in December.

5

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