1 error[E0432]: unresolved import `libc`
2 --> $DIR/issue-37887.rs:3:9
5 | ^^^^ maybe a missing crate `libc`?
7 error[E0658]: use of unstable library feature 'rustc_private': this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via `Cargo.toml` instead?
8 --> $DIR/issue-37887.rs:2:5
10 LL | extern crate libc;
13 = note: see issue #27812 <https://github.com/rust-lang/rust/issues/27812> for more information
14 = help: add `#![feature(rustc_private)]` to the crate attributes to enable
16 error: aborting due to 2 previous errors
18 Some errors have detailed explanations: E0432, E0658.
19 For more information about an error, try `rustc --explain E0432`.