`unresolved import` for some `#[path = ".."]

• OS: Linux (Arch LInux)
• Toolchain: stable-x86_64-unknown-linux-gnu (1.42.0)
• rust-analyzer: https://github.com/rust-analyzer/rust-analyzer/commit/779555c1beac90f633c01a773558c4007c99c97f

unresolved import errors show up for:

1. File paths whose extensions are not rs
2. Absolute file paths
3. Outside of the workspace (or simply workspace_root or somewhere?)

These files do exist.

$ tree -I target "$PWD"
/home/ryo/src/local/a
├── Cargo.lock
├── Cargo.toml
├── empty-file
├── empty-file.rs
└── src
    └── main.rs

1 directory, 7 files
$ touch ./src/main.rs && cargo clippy
    Checking a v0.1.0 (/home/ryo/src/local/a)
    Finished dev [unoptimized + debuginfo] target(s) in 0.47s
$ # OK

Reproduce the report from the listed project tree, including src/main.rs, empty-file, and empty-file.rs, using the noted stable Rust toolchain and rust-analyzer revision. Start by running cargo clippy and tracing the unresolved-import diagnostics for #[path] cases involving non-Rust extensions, absolute paths, and paths outside the workspace; done means existing paths no longer produce false errors.