Dec 19 12:34:44.262 INFO checking mitsuhiko/systemfd against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 12:34:44.263 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/mitsuhiko/systemfd:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:34:44.475 INFO [stdout] 2d75bb621ba4bc4d5e55dcc6a8d9905ba42630b22bef39536a083f76fb1dad35
Dec 19 12:34:44.477 INFO running `"docker" "start" "-a" "2d75bb621ba4bc4d5e55dcc6a8d9905ba42630b22bef39536a083f76fb1dad35"`
Dec 19 12:34:45.224 INFO [stderr]     Checking parking_lot v0.5.5
Dec 19 12:34:45.224 INFO [stderr]     Checking regex v0.2.11
Dec 19 12:34:45.224 INFO [stderr]     Checking regex v1.0.0
Dec 19 12:34:47.429 INFO [stderr]     Checking console v0.6.1
Dec 19 12:34:48.145 INFO [stderr]     Checking systemfd v0.3.0 (/opt/crater/workdir)
Dec 19 12:34:49.012 INFO [stderr] warning: struct is never constructed: `QuietExit`
Dec 19 12:34:49.012 INFO [stderr]  --> src/utils.rs:5:1
Dec 19 12:34:49.012 INFO [stderr]   |
Dec 19 12:34:49.012 INFO [stderr] 5 | pub struct QuietExit(pub i32);
Dec 19 12:34:49.012 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:34:49.012 INFO [stderr]   |
Dec 19 12:34:49.012 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 12:34:49.012 INFO [stderr] 
Dec 19 12:34:49.012 INFO [stderr] warning: unused attribute
Dec 19 12:34:49.012 INFO [stderr]  --> src/utils.rs:4:1
Dec 19 12:34:49.012 INFO [stderr]   |
Dec 19 12:34:49.012 INFO [stderr] 4 | #[ignore(dead_code)]
Dec 19 12:34:49.012 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^
Dec 19 12:34:49.012 INFO [stderr]   |
Dec 19 12:34:49.012 INFO [stderr]   = note: #[warn(unused_attributes)] on by default
Dec 19 12:34:49.012 INFO [stderr] 
Dec 19 12:34:49.072 INFO [stderr] warning: struct is never constructed: `QuietExit`
Dec 19 12:34:49.072 INFO [stderr]  --> src/utils.rs:5:1
Dec 19 12:34:49.072 INFO [stderr]   |
Dec 19 12:34:49.072 INFO [stderr] 5 | pub struct QuietExit(pub i32);
Dec 19 12:34:49.072 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:34:49.072 INFO [stderr]   |
Dec 19 12:34:49.072 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 12:34:49.072 INFO [stderr] 
Dec 19 12:34:49.078 INFO [stderr] warning: unused attribute
Dec 19 12:34:49.078 INFO [stderr]  --> src/utils.rs:4:1
Dec 19 12:34:49.078 INFO [stderr]   |
Dec 19 12:34:49.078 INFO [stderr] 4 | #[ignore(dead_code)]
Dec 19 12:34:49.078 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^
Dec 19 12:34:49.078 INFO [stderr]   |
Dec 19 12:34:49.078 INFO [stderr]   = note: #[warn(unused_attributes)] on by default
Dec 19 12:34:49.078 INFO [stderr] 
Dec 19 12:34:49.104 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.00s
Dec 19 12:34:49.612 INFO running `"docker" "inspect" "2d75bb621ba4bc4d5e55dcc6a8d9905ba42630b22bef39536a083f76fb1dad35"`
Dec 19 12:34:49.891 INFO running `"docker" "rm" "-f" "2d75bb621ba4bc4d5e55dcc6a8d9905ba42630b22bef39536a083f76fb1dad35"`
Dec 19 12:34:50.116 INFO [stdout] 2d75bb621ba4bc4d5e55dcc6a8d9905ba42630b22bef39536a083f76fb1dad35