Newly emitting non_snake_case warnings on output of derive macro

[spencerwilson]

rust-analyzer version: rust-analyzer 0.3.1599-standalone (99718d0 2023-07-22)

rustc version: rustc 1.69.0 (84c898d65 2023-04-16)

Expected behavior

For a given rustc lint (e.g., non_snake_case), cargo check and rust-analyzer report the same set of warnings/errors for that lint. If one of them reports a violation, the other does, too.

Actual behavior

In my project,

• cargo check reports no issues ✅
• rust-analyzer 0.3.1591-standalone (d82451103 2023-07-16) reports no issues ✅
• rust-analyzer 0.3.1599-standalone (99718d0c8 2023-07-22) reports warning instances of the rustc lint non_snake_case ❌

Details

In my scenario I have a build.rs that generates a source file, which elsewhere I inline via tonic::include_proto!. For each instance in the generated code of #[derive(::prost::Message)], the newer rust-analyzer gives the following warning:

Function `ScalarWrapper` should have snake_case name, e.g. `scalar_wrapper`

The only occurrence of that identifier in the prost-derive source tree is here: https://github.com/tokio-rs/prost/blob/468c80cd343321d5d4b361febbeec832ab5228b6/prost-derive/src/field/mod.rs#L145-L153

Sorry, I won't have time in the next couple weeks to make a minimal repro. Hopefully this is enough info to give some ideas. Please let me know if there are any simple steps I can perform to help debug. Oh and if this is actually expected behavior, that's fine too, I can look into getting it resolved in prost-derive then.

[spencerwilson]

Workaround for VS Code users: Set the following type of thing in in VS Code settings:

{
  "rust-analyzer.server.path": "/path/to/rust-analyzer-aarch64-apple-darwin-2023-07-16"
}

[lowr]

I believe this is the same issue as #15344. Closing as a duplicate, but thanks for the report!

For anyone interested, the warning seems to originate in this TokenStream.