Incorrect `cwd` during macro expansion

[max-sixty]

rust-analyzer version: 0.3.2053-standalone (fd74511 2024-07-28)

rustc version: 1.80.0

editor or extension: VSCode

repository link (if public, optional): https://github.com/binary-banter/test-each-file/tree/repro

code snippet to reproduce:

Given this code:

use std::path::Path;

use test_macro::test_each_file;

fn main() {
    test_each_file!();
    
    assert!(Path::new("./ROOT.txt").is_file());
    println!("Hello, world!");
}

...referencing this macro:

use std::path::Path;

#[proc_macro]
pub fn test_each_file(_input: proc_macro::TokenStream) -> proc_macro::TokenStream {
    assert!(Path::new("./ROOT.txt").is_file());

    proc_macro::TokenStream::new()
}

...rustc finds ROOT.txt at the root of the workspace. But rust-analyzer instead looks for ROOT.txt at the root of the crate. This means that rust-analyzer shows errors for this path despite it compiling with rustc fine.

ref binary-banter/test-each-file#6. Repo with a repro linked above.

[Veykril]

Okay so turns out with this we will have to discard our crate graph deduplication logic as crates are now always unique wrt to their workspace. Unfortunate.