Stream: cargo-component

Topic: ✔ WIT compilation issue: left behind trailing whitespace

view this post on Zulip Sehz (Mar 04 2024 at 19:04):

I am getting this compilation issue with latest release of cargo component:

error[internal]: left behind trailing whitespace
     --> <stdin>:21896:21896:1
      |
21896 |
      | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      |

warning: rustfmt has failed to format. See previous 292 errors.

thread 'main' panicked at /Users/runner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/wit-bindgen-rust-0.20.0/src/lib.rs:1107:13:
assertion failed: status.success()
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

view this post on Zulip Peter Huene (Mar 04 2024 at 19:31):

Hi @Sehz. Sorry about that! The latest version of cargo-component tries to format the generated bindings automatically, which is hitting some issues on vary complicated bindings.

We've filed https://github.com/bytecodealliance/wit-bindgen/issues/880 to improve this.

In the meantime, you can disable the automatic formatting by setting package.metadata.component.bindings.format to false.

replace `cargo fmt` with the `prettyplease` crate · Issue #880 · bytecodealliance/wit-bindgen
In order to more structurally work around code formatting issues like those described in #878, we should consider switching from cargo fmt to Dtolnay's prettyplease crate. This crate was designed s...

view this post on Zulip Peter Huene (Mar 04 2024 at 19:32):

I'll amend the release notes with the above information updated!

view this post on Zulip Sehz (Mar 04 2024 at 19:48):

Ok. that fixed the issue. But now getting different error: ```Error: failed to load cargo metadata

Caused by:
cargo metadata exited with an error: error: failed to parse manifest at Cargo.toml

Caused by:
  feature `wasm-component` includes `dep:wit-bindgen`, but `wit-bindgen` is not listed as a dependency```

I am following example here: https://github.com/bytecodealliance/cargo-component/blob/main/example/Cargo.toml. If I add wit-bindgen as dependency like previous release , it works

view this post on Zulip Peter Huene (Mar 04 2024 at 19:50):

Sounds like a feature local to your Cargo.toml (i.e. wasm-component) needs to be updated to use wit-bindgen-rt instead of wit-bindgen

view this post on Zulip Sehz (Mar 04 2024 at 19:52):

I am running latest version of was-component: cargo component --version cargo-component-component 0.9.0 (dc7cb41 2024-03-01 wasi:ab5a448)

view this post on Zulip Sehz (Mar 04 2024 at 19:54):

never mind. There was feature dep to cargo component. sorry

view this post on Zulip Notification Bot (Mar 05 2024 at 22:34):

Sehz has marked this topic as resolved.

Last updated: Dec 06 2025 at 06:05 UTC