The “use of unstable library feature 'rustc_private'” error is very repetitive #44953
Description
rustc 1.22.0-nightly (0e6f4cf51 2017-09-27)
Compiling this:
#[macro_use] extern crate log; pub fn main() { info!("This is a log message."); }while not including log as a dependency in Cargo.toml, produces the following output:
error: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, and unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead? (see issue #27812) --> main.rs:1:14 | 1 | #[macro_use] extern crate log; | ^^^^^^^^^^^^^^^^^ | = help: add #![feature(rustc_private)] to the crate attributes to enable error: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, and unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead? (see issue #27812) --> main.rs:4:2 | 4 | info!("This is a log message."); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: add #![feature(rustc_private)] to the crate attributes to enable = note: this error originates in a macro outside of the current crate error: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, and unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead? (see issue #27812) --> main.rs:4:2 | 4 | info!("This is a log message."); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: add #![feature(rustc_private)] to the crate attributes to enable = note: this error originates in a macro outside of the current crate error: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, and unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead? (see issue #27812) --> main.rs:4:2 | 4 | info!("This is a log message."); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: add #![feature(rustc_private)] to the crate attributes to enable = note: this error originates in a macro outside of the current crate error: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, and unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead? (see issue #27812) --> main.rs:4:2 | 4 | info!("This is a log message."); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: add #![feature(rustc_private)] to the crate attributes to enable = note: this error originates in a macro outside of the current crate error: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, and unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead? (see issue #27812) --> main.rs:4:2 | 4 | info!("This is a log message."); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: add #![feature(rustc_private)] to the crate attributes to enable = note: this error originates in a macro outside of the current crate error: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, and unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead? (see issue #27812) --> main.rs:4:2 | 4 | info!("This is a log message."); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: add #![feature(rustc_private)] to the crate attributes to enable = note: this error originates in a macro outside of the current crate error: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, and unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead? (see issue #27812) --> main.rs:4:2 | 4 | info!("This is a log message."); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: add #![feature(rustc_private)] to the crate attributes to enable = note: this error originates in a macro outside of the current crate error: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, and unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead? (see issue #27812) --> main.rs:4:2 | 4 | info!("This is a log message."); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: add #![feature(rustc_private)] to the crate attributes to enable = note: this error originates in a macro outside of the current crate error: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, and unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead? (see issue #27812) --> main.rs:4:2 | 4 | info!("This is a log message."); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = help: add #![feature(rustc_private)] to the crate attributes to enable = note: this error originates in a macro outside of the current crate error: aborting due to 10 previous errors