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actual "crate root" file not identified in diagnostics #157001
Description
Code
// inside some file that is inside a crate's tests
#![feature(something)]Current output
warning: the `#![feature]` attribute can only be used at the crate rootDesired output
warning: the `#![feature]` attribute can only be used at the crate root
...
help: add `#![feature(something)]` to path/to/crate/root/lib.rsRationale and extra context
Normally the crate root file is fairly obvious but there are cases, like with integration tests, where it is not. Even for more experienced programmers, "crate root" can be a slightly puzzling turn of phrase.
Other cases
Rust Version
rustc 1.96.0-nightly (55e86c996 2026-04-02)
binary: rustc
commit-hash: 55e86c996809902e8bbad512cfb4d2c18be446d9
commit-date: 2026-04-02
host: x86_64-unknown-linux-gnu
release: 1.96.0-nightly
LLVM version: 22.1.2Anything else?
Issue is an extraction from #144935 (comment)
Activity
Rollup merge of rust-lang#157025 - Dnreikronos:fix/crate-root-path-he…
Unrolled build for #157025