Dec 14 03:42:57.099 INFO testing aisamanra/rust-closure-callback against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 14 03:42:57.100 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-1/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 14 03:42:57.436 INFO [stdout] 4f4b8a8fddd65f24fa5b9f0b0862dde5cb19a59139a662e7ce3550449b2be908
Dec 14 03:42:57.439 INFO running `"docker" "start" "-a" "4f4b8a8fddd65f24fa5b9f0b0862dde5cb19a59139a662e7ce3550449b2be908"`
Dec 14 03:42:58.383 INFO [stderr] usermod: no changes
Dec 14 03:42:58.415 INFO [stderr]    Compiling cb v0.1.0 (/source)
Dec 14 03:42:59.659 INFO [stderr] 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? (see issue #27812)
Dec 14 03:42:59.659 INFO [stderr]   --> src/main.rs:14:1
Dec 14 03:42:59.659 INFO [stderr]    |
Dec 14 03:42:59.659 INFO [stderr] 14 | extern crate libc;
Dec 14 03:42:59.659 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 14 03:42:59.659 INFO [stderr]    |
Dec 14 03:42:59.659 INFO [stderr]    = help: add #![feature(rustc_private)] to the crate attributes to enable
Dec 14 03:42:59.659 INFO [stderr] 
Dec 14 03:42:59.659 INFO [stderr] 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? (see issue #27812)
Dec 14 03:42:59.659 INFO [stderr]   --> src/main.rs:16:5
Dec 14 03:42:59.659 INFO [stderr]    |
Dec 14 03:42:59.659 INFO [stderr] 16 | use libc::*;
Dec 14 03:42:59.659 INFO [stderr]    |     ^^^^
Dec 14 03:42:59.659 INFO [stderr]    |
Dec 14 03:42:59.659 INFO [stderr]    = help: add #![feature(rustc_private)] to the crate attributes to enable
Dec 14 03:42:59.659 INFO [stderr] 
Dec 14 03:42:59.704 INFO [stderr] error: aborting due to 2 previous errors
Dec 14 03:42:59.704 INFO [stderr] 
Dec 14 03:42:59.704 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 14 03:42:59.707 INFO [stderr] error: Could not compile `cb`.
Dec 14 03:42:59.707 INFO [stderr] 
Dec 14 03:42:59.707 INFO [stderr] To learn more, run the command again with --verbose.
Dec 14 03:42:59.709 INFO [stderr] su: No module specific data is present
Dec 14 03:43:00.002 INFO running `"docker" "inspect" "4f4b8a8fddd65f24fa5b9f0b0862dde5cb19a59139a662e7ce3550449b2be908"`
Dec 14 03:43:00.088 INFO running `"docker" "rm" "-f" "4f4b8a8fddd65f24fa5b9f0b0862dde5cb19a59139a662e7ce3550449b2be908"`
Dec 14 03:43:00.188 INFO [stdout] 4f4b8a8fddd65f24fa5b9f0b0862dde5cb19a59139a662e7ce3550449b2be908