Dec 17 23:55:36.320 INFO checking gavynriebau/rrat against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 23:55:36.320 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/gavynriebau/rrat:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 23:55:36.668 INFO [stdout] 9b4fa3148326d406241afe7b73d6b56b2beadb1bd9dd1e6f064d224639666514
Dec 17 23:55:36.674 INFO running `"docker" "start" "-a" "9b4fa3148326d406241afe7b73d6b56b2beadb1bd9dd1e6f064d224639666514"`
Dec 17 23:55:37.902 INFO [stderr]     Checking chrono v0.4.0
Dec 17 23:55:39.544 INFO [stderr]     Checking env_logger v0.5.2
Dec 17 23:55:40.082 INFO [stderr]     Checking rrat v0.1.0 (/opt/crater/workdir)
Dec 17 23:55:40.524 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 17 23:55:40.524 INFO [stderr]   --> src/main.rs:13:1
Dec 17 23:55:40.524 INFO [stderr]    |
Dec 17 23:55:40.524 INFO [stderr] 13 | extern crate libc;
Dec 17 23:55:40.524 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 17 23:55:40.524 INFO [stderr]    |
Dec 17 23:55:40.524 INFO [stderr]    = help: add #![feature(rustc_private)] to the crate attributes to enable
Dec 17 23:55:40.524 INFO [stderr] 
Dec 17 23:55:40.637 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 17 23:55:40.637 INFO [stderr]   --> src/main.rs:13:1
Dec 17 23:55:40.637 INFO [stderr]    |
Dec 17 23:55:40.637 INFO [stderr] 13 | extern crate libc;
Dec 17 23:55:40.637 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Dec 17 23:55:40.637 INFO [stderr]    |
Dec 17 23:55:40.637 INFO [stderr]    = help: add #![feature(rustc_private)] to the crate attributes to enable
Dec 17 23:55:40.637 INFO [stderr] 
Dec 17 23:55:40.672 INFO [stderr] error: aborting due to previous error
Dec 17 23:55:40.672 INFO [stderr] 
Dec 17 23:55:40.672 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 17 23:55:40.688 INFO [stderr] error: Could not compile `rrat`.
Dec 17 23:55:40.688 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 17 23:55:40.792 INFO [stderr] error: aborting due to previous error
Dec 17 23:55:40.792 INFO [stderr] 
Dec 17 23:55:40.792 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 17 23:55:40.799 INFO [stderr] error: Could not compile `rrat`.
Dec 17 23:55:40.799 INFO [stderr] 
Dec 17 23:55:40.799 INFO [stderr] To learn more, run the command again with --verbose.
Dec 17 23:55:41.792 INFO running `"docker" "inspect" "9b4fa3148326d406241afe7b73d6b56b2beadb1bd9dd1e6f064d224639666514"`
Dec 17 23:55:42.038 INFO running `"docker" "rm" "-f" "9b4fa3148326d406241afe7b73d6b56b2beadb1bd9dd1e6f064d224639666514"`
Dec 17 23:55:42.380 INFO [stdout] 9b4fa3148326d406241afe7b73d6b56b2beadb1bd9dd1e6f064d224639666514