Dec 11 13:31:40.690 INFO checking mitsuhiko/systemfd against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 13:31:40.690 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-6/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/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 +3a75e80557a103497cffbcab395a2f37061a77ea-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 11 13:31:41.114 INFO [stdout] 4e4992f393e13cbe7a67808f2a4d00c3cacf4f6cb7747a8a88e87765a1bbdc38
Dec 11 13:31:41.124 INFO running `"docker" "start" "-a" "4e4992f393e13cbe7a67808f2a4d00c3cacf4f6cb7747a8a88e87765a1bbdc38"`
Dec 11 13:31:42.361 INFO [stderr] usermod: no changes
Dec 11 13:31:42.495 INFO [stderr]     Checking termios v0.2.2
Dec 11 13:31:42.500 INFO [stderr]     Checking clicolors-control v0.2.0
Dec 11 13:31:42.500 INFO [stderr]     Checking backtrace-sys v0.1.16
Dec 11 13:31:42.500 INFO [stderr]     Checking regex v1.0.0
Dec 11 13:31:42.500 INFO [stderr]     Checking nix v0.10.0
Dec 11 13:31:42.844 INFO [stderr]     Checking backtrace v0.3.7
Dec 11 13:31:43.012 INFO [stderr]     Checking console v0.6.1
Dec 11 13:31:43.884 INFO [stderr]     Checking failure v0.1.1
Dec 11 13:31:48.574 INFO [stderr]     Checking systemfd v0.3.0 (/source)
Dec 11 13:31:50.616 INFO [stderr] warning: struct is never constructed: `QuietExit`
Dec 11 13:31:50.616 INFO [stderr]  --> src/utils.rs:5:1
Dec 11 13:31:50.616 INFO [stderr]   |
Dec 11 13:31:50.616 INFO [stderr] 5 | pub struct QuietExit(pub i32);
Dec 11 13:31:50.616 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 13:31:50.616 INFO [stderr]   |
Dec 11 13:31:50.616 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 13:31:50.616 INFO [stderr] 
Dec 11 13:31:50.616 INFO [stderr] warning: unused attribute
Dec 11 13:31:50.616 INFO [stderr]  --> src/utils.rs:4:1
Dec 11 13:31:50.616 INFO [stderr]   |
Dec 11 13:31:50.616 INFO [stderr] 4 | #[ignore(dead_code)]
Dec 11 13:31:50.616 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^
Dec 11 13:31:50.616 INFO [stderr]   |
Dec 11 13:31:50.616 INFO [stderr]   = note: #[warn(unused_attributes)] on by default
Dec 11 13:31:50.616 INFO [stderr] 
Dec 11 13:31:50.684 INFO [stderr] warning: struct is never constructed: `QuietExit`
Dec 11 13:31:50.684 INFO [stderr]  --> src/utils.rs:5:1
Dec 11 13:31:50.684 INFO [stderr]   |
Dec 11 13:31:50.684 INFO [stderr] 5 | pub struct QuietExit(pub i32);
Dec 11 13:31:50.684 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 13:31:50.684 INFO [stderr]   |
Dec 11 13:31:50.684 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 13:31:50.684 INFO [stderr] 
Dec 11 13:31:50.684 INFO [stderr] warning: unused attribute
Dec 11 13:31:50.684 INFO [stderr]  --> src/utils.rs:4:1
Dec 11 13:31:50.684 INFO [stderr]   |
Dec 11 13:31:50.684 INFO [stderr] 4 | #[ignore(dead_code)]
Dec 11 13:31:50.684 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^
Dec 11 13:31:50.684 INFO [stderr]   |
Dec 11 13:31:50.684 INFO [stderr]   = note: #[warn(unused_attributes)] on by default
Dec 11 13:31:50.684 INFO [stderr] 
Dec 11 13:31:50.726 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.35s
Dec 11 13:31:50.742 INFO [stderr] su: No module specific data is present
Dec 11 13:31:51.616 INFO running `"docker" "inspect" "4e4992f393e13cbe7a67808f2a4d00c3cacf4f6cb7747a8a88e87765a1bbdc38"`
Dec 11 13:31:51.960 INFO running `"docker" "rm" "-f" "4e4992f393e13cbe7a67808f2a4d00c3cacf4f6cb7747a8a88e87765a1bbdc38"`
Dec 11 13:31:52.328 INFO [stdout] 4e4992f393e13cbe7a67808f2a4d00c3cacf4f6cb7747a8a88e87765a1bbdc38