rust-lang / rust-lang/rust

Import of deprecated function triggers warning even if a non-deprecated macro of the same name is used

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#148,426 3 comments 2 reactions 2 assignees View on GitHub

@jdonszelmann is already working on this.

Since Nov 3, 2025.

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Description

I tried this code (with snapbox 0.6.23):

use snapbox::cmd::cargo_bin;

fn foo() {
    cargo_bin!();
}

There is:

  • A deprecated function snapbox::cmd::cargo_bin
  • A non-deprecated macro snapbox::cmd::cargo_bin

I expected to see this happen: no warning, since we're only using the macro.

Instead, this happened: import of the deprecated function triggered a warning.

error: use of deprecated function `snapbox::cmd::cargo_bin`: incompatible with a custom cargo build-dir, see instead `cmd::cargo_bin!`
 --> tests/suite/cli_rustup_init_ui.rs:5:29
  |
5 | use snapbox::cmd::{Command, cargo_bin};
  |                             ^^^^^^^^^
  |
  = note: `-D deprecated` implied by `-D warnings`
  = help: to override `-D warnings` add `#[allow(deprecated)]`
Meta

rustc --version --verbose:

rustc 1.91.0 (f8297e351 2025-10-28)
binary: rustc
commit-hash: f8297e351a40c1439a467bbbb6879088047f50b3
commit-date: 2025-10-28
host: aarch64-apple-darwin
release: 1.91.0
LLVM version: 21.1.2

(Behavior is the same with rustc 1.93.0-nightly (b15a874aa 2025-11-02)).

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