Dec 04 14:02:28.055 INFO checking mitsuhiko/systemfd against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 14:02:28.055 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-4/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-alt check --frozen --all --all-targets" "-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 04 14:02:28.315 INFO [stdout] 4bedd71e6ad0a0465262356942212a5cfe62c3e834ca50a743abc341a0c7f0fa
Dec 04 14:02:28.317 INFO running `"docker" "start" "-a" "4bedd71e6ad0a0465262356942212a5cfe62c3e834ca50a743abc341a0c7f0fa"`
Dec 04 14:02:29.114 INFO [stderr] usermod: no changes
Dec 04 14:02:29.257 INFO [stderr]     Checking clicolors-control v0.2.0
Dec 04 14:02:29.269 INFO [stderr]     Checking parking_lot v0.5.5
Dec 04 14:02:29.269 INFO [stderr]     Checking regex v0.2.11
Dec 04 14:02:29.269 INFO [stderr]     Checking regex v1.0.0
Dec 04 14:02:29.282 INFO [stderr]     Checking failure v0.1.1
Dec 04 14:02:32.383 INFO [stderr]     Checking console v0.6.1
Dec 04 14:02:33.349 INFO [stderr]     Checking systemfd v0.3.0 (/source)
Dec 04 14:02:35.071 INFO [stderr] warning: struct is never constructed: `QuietExit`
Dec 04 14:02:35.071 INFO [stderr]  --> src/utils.rs:5:1
Dec 04 14:02:35.071 INFO [stderr]   |
Dec 04 14:02:35.071 INFO [stderr] 5 | pub struct QuietExit(pub i32);
Dec 04 14:02:35.071 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 14:02:35.071 INFO [stderr]   |
Dec 04 14:02:35.071 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 04 14:02:35.071 INFO [stderr] 
Dec 04 14:02:35.071 INFO [stderr] warning: unused attribute
Dec 04 14:02:35.071 INFO [stderr]  --> src/utils.rs:4:1
Dec 04 14:02:35.071 INFO [stderr]   |
Dec 04 14:02:35.071 INFO [stderr] 4 | #[ignore(dead_code)]
Dec 04 14:02:35.071 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^
Dec 04 14:02:35.071 INFO [stderr]   |
Dec 04 14:02:35.071 INFO [stderr]   = note: #[warn(unused_attributes)] on by default
Dec 04 14:02:35.071 INFO [stderr] 
Dec 04 14:02:35.091 INFO [stderr] warning: struct is never constructed: `QuietExit`
Dec 04 14:02:35.091 INFO [stderr]  --> src/utils.rs:5:1
Dec 04 14:02:35.091 INFO [stderr]   |
Dec 04 14:02:35.091 INFO [stderr] 5 | pub struct QuietExit(pub i32);
Dec 04 14:02:35.091 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 14:02:35.091 INFO [stderr]   |
Dec 04 14:02:35.091 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 04 14:02:35.091 INFO [stderr] 
Dec 04 14:02:35.091 INFO [stderr] warning: unused attribute
Dec 04 14:02:35.091 INFO [stderr]  --> src/utils.rs:4:1
Dec 04 14:02:35.091 INFO [stderr]   |
Dec 04 14:02:35.091 INFO [stderr] 4 | #[ignore(dead_code)]
Dec 04 14:02:35.091 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^
Dec 04 14:02:35.091 INFO [stderr]   |
Dec 04 14:02:35.091 INFO [stderr]   = note: #[warn(unused_attributes)] on by default
Dec 04 14:02:35.091 INFO [stderr] 
Dec 04 14:02:35.113 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.98s
Dec 04 14:02:35.123 INFO [stderr] su: No module specific data is present
Dec 04 14:02:35.585 INFO running `"docker" "inspect" "4bedd71e6ad0a0465262356942212a5cfe62c3e834ca50a743abc341a0c7f0fa"`
Dec 04 14:02:35.829 INFO running `"docker" "rm" "-f" "4bedd71e6ad0a0465262356942212a5cfe62c3e834ca50a743abc341a0c7f0fa"`
Dec 04 14:02:35.935 INFO [stdout] 4bedd71e6ad0a0465262356942212a5cfe62c3e834ca50a743abc341a0c7f0fa