Dec 14 15:02:28.683 INFO testing uuid_v1_variant-0.1.4 against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 14 15:02:28.683 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/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 15:02:29.147 INFO [stdout] c202f1451726e7e47950391f633c4ab5eabbeb363e6eb6e9046934140226a91c
Dec 14 15:02:29.155 INFO running `"docker" "start" "-a" "c202f1451726e7e47950391f633c4ab5eabbeb363e6eb6e9046934140226a91c"`
Dec 14 15:02:31.038 INFO [stderr] usermod: no changes
Dec 14 15:02:31.187 INFO [stderr]    Compiling eui48 v0.3.2
Dec 14 15:02:32.303 INFO [stderr]    Compiling uuid_v1_variant v0.1.4 (/source)
Dec 14 15:02:33.031 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 15:02:33.031 INFO [stderr]  --> src/lib.rs:3:1
Dec 14 15:02:33.031 INFO [stderr]   |
Dec 14 15:02:33.031 INFO [stderr] 3 | extern crate libc;
Dec 14 15:02:33.031 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^
Dec 14 15:02:33.031 INFO [stderr]   |
Dec 14 15:02:33.031 INFO [stderr]   = help: add #![feature(rustc_private)] to the crate attributes to enable
Dec 14 15:02:33.031 INFO [stderr] 
Dec 14 15:02:33.031 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 15:02:33.031 INFO [stderr]  --> src/lib.rs:8:12
Dec 14 15:02:33.031 INFO [stderr]   |
Dec 14 15:02:33.031 INFO [stderr] 8 | use libc::{c_char};
Dec 14 15:02:33.031 INFO [stderr]   |            ^^^^^^
Dec 14 15:02:33.031 INFO [stderr]   |
Dec 14 15:02:33.031 INFO [stderr]   = help: add #![feature(rustc_private)] to the crate attributes to enable
Dec 14 15:02:33.031 INFO [stderr] 
Dec 14 15:02:33.031 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 15:02:33.031 INFO [stderr]   --> src/lib.rs:23:40
Dec 14 15:02:33.031 INFO [stderr]    |
Dec 14 15:02:33.031 INFO [stderr] 23 | pub extern fn uuid_gen_new(ptr: *const c_char) -> *mut UUIDGen {
Dec 14 15:02:33.031 INFO [stderr]    |                                        ^^^^^^
Dec 14 15:02:33.031 INFO [stderr]    |
Dec 14 15:02:33.031 INFO [stderr]    = help: add #![feature(rustc_private)] to the crate attributes to enable
Dec 14 15:02:33.031 INFO [stderr] 
Dec 14 15:02:33.156 INFO [stderr] error: aborting due to 3 previous errors
Dec 14 15:02:33.156 INFO [stderr] 
Dec 14 15:02:33.156 INFO [stderr] For more information about this error, try `rustc --explain E0658`.
Dec 14 15:02:33.169 INFO [stderr] error: Could not compile `uuid_v1_variant`.
Dec 14 15:02:33.169 INFO [stderr] 
Dec 14 15:02:33.169 INFO [stderr] To learn more, run the command again with --verbose.
Dec 14 15:02:33.171 INFO [stderr] su: No module specific data is present
Dec 14 15:02:33.787 INFO running `"docker" "inspect" "c202f1451726e7e47950391f633c4ab5eabbeb363e6eb6e9046934140226a91c"`
Dec 14 15:02:34.016 INFO running `"docker" "rm" "-f" "c202f1451726e7e47950391f633c4ab5eabbeb363e6eb6e9046934140226a91c"`
Dec 14 15:02:34.311 INFO [stdout] c202f1451726e7e47950391f633c4ab5eabbeb363e6eb6e9046934140226a91c