1 error[E0432]: unresolved import `libc`
2 --> $DIR/issue-37887.rs:3:9
5 | ^^^^ maybe a missing crate `libc`?
7 = help: consider adding `extern crate libc` to use the `libc` crate
9 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?
10 --> $DIR/issue-37887.rs:2:5
12 LL | extern crate libc;
15 = note: see issue #27812 <https://github.com/rust-lang/rust/issues/27812> for more information
16 = help: add `#![feature(rustc_private)]` to the crate attributes to enable
18 error: aborting due to 2 previous errors
20 Some errors have detailed explanations: E0432, E0658.
21 For more information about an error, try `rustc --explain E0432`.