Dec 19 12:34:43.985 INFO checking mitsuhiko/systemfd against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 12:34:43.985 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:34:44.216 INFO [stdout] cbb2ed57f828a235793a89849ea281dfa4ac8d84514bb0f4980edc22bd838091
Dec 19 12:34:44.219 INFO running `"docker" "start" "-a" "cbb2ed57f828a235793a89849ea281dfa4ac8d84514bb0f4980edc22bd838091"`
Dec 19 12:34:44.876 INFO [stderr]    Compiling backtrace-sys v0.1.16
Dec 19 12:34:44.876 INFO [stderr]     Checking clap v2.31.2
Dec 19 12:34:44.876 INFO [stderr]     Checking nix v0.10.0
Dec 19 12:34:44.876 INFO [stderr]     Checking regex v0.2.11
Dec 19 12:34:44.876 INFO [stderr]     Checking regex v1.0.0
Dec 19 12:34:47.322 INFO [stderr]     Checking console v0.6.1
Dec 19 12:34:57.767 INFO [stderr]     Checking backtrace v0.3.7
Dec 19 12:34:58.177 INFO [stderr]     Checking failure v0.1.1
Dec 19 12:34:58.660 INFO [stderr]     Checking systemfd v0.3.0 (/opt/crater/workdir)
Dec 19 12:34:59.674 INFO [stderr] warning: struct is never constructed: `QuietExit`
Dec 19 12:34:59.674 INFO [stderr]  --> src/utils.rs:5:1
Dec 19 12:34:59.674 INFO [stderr]   |
Dec 19 12:34:59.674 INFO [stderr] 5 | pub struct QuietExit(pub i32);
Dec 19 12:34:59.674 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:34:59.674 INFO [stderr]   |
Dec 19 12:34:59.674 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 12:34:59.674 INFO [stderr] 
Dec 19 12:34:59.677 INFO [stderr] warning: unused attribute
Dec 19 12:34:59.677 INFO [stderr]  --> src/utils.rs:4:1
Dec 19 12:34:59.677 INFO [stderr]   |
Dec 19 12:34:59.677 INFO [stderr] 4 | #[ignore(dead_code)]
Dec 19 12:34:59.677 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^
Dec 19 12:34:59.677 INFO [stderr]   |
Dec 19 12:34:59.677 INFO [stderr]   = note: #[warn(unused_attributes)] on by default
Dec 19 12:34:59.677 INFO [stderr] 
Dec 19 12:34:59.736 INFO [stderr] warning: struct is never constructed: `QuietExit`
Dec 19 12:34:59.736 INFO [stderr]  --> src/utils.rs:5:1
Dec 19 12:34:59.736 INFO [stderr]   |
Dec 19 12:34:59.736 INFO [stderr] 5 | pub struct QuietExit(pub i32);
Dec 19 12:34:59.736 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 12:34:59.736 INFO [stderr]   |
Dec 19 12:34:59.736 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 12:34:59.736 INFO [stderr] 
Dec 19 12:34:59.742 INFO [stderr] warning: unused attribute
Dec 19 12:34:59.742 INFO [stderr]  --> src/utils.rs:4:1
Dec 19 12:34:59.742 INFO [stderr]   |
Dec 19 12:34:59.742 INFO [stderr] 4 | #[ignore(dead_code)]
Dec 19 12:34:59.742 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^
Dec 19 12:34:59.742 INFO [stderr]   |
Dec 19 12:34:59.742 INFO [stderr]   = note: #[warn(unused_attributes)] on by default
Dec 19 12:34:59.742 INFO [stderr] 
Dec 19 12:34:59.784 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.03s
Dec 19 12:35:00.586 INFO running `"docker" "inspect" "cbb2ed57f828a235793a89849ea281dfa4ac8d84514bb0f4980edc22bd838091"`
Dec 19 12:35:00.904 INFO running `"docker" "rm" "-f" "cbb2ed57f828a235793a89849ea281dfa4ac8d84514bb0f4980edc22bd838091"`
Dec 19 12:35:01.197 INFO [stdout] cbb2ed57f828a235793a89849ea281dfa4ac8d84514bb0f4980edc22bd838091