Dec 04 15:43:58.681 INFO checking kk1fff/backprop against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 15:43:58.681 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-1/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/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 +1df97983eb2057dc6a8f7eb364e263b51ae23230-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 15:43:59.174 INFO [stdout] eae774e91444be4c21dba694f7c2b0ede3c380d97fd945403c7ccca3d90c7a29
Dec 04 15:43:59.177 INFO running `"docker" "start" "-a" "eae774e91444be4c21dba694f7c2b0ede3c380d97fd945403c7ccca3d90c7a29"`
Dec 04 15:44:00.195 INFO [stderr] usermod: no changes
Dec 04 15:44:00.275 INFO [stderr]     Checking backprop v0.1.0 (/source)
Dec 04 15:44:00.879 INFO [stderr] warning: field is never used: `name`
Dec 04 15:44:00.879 INFO [stderr]   --> src/main.rs:46:5
Dec 04 15:44:00.879 INFO [stderr]    |
Dec 04 15:44:00.879 INFO [stderr] 46 |     name: String,
Dec 04 15:44:00.879 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 04 15:44:00.879 INFO [stderr]    |
Dec 04 15:44:00.879 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 15:44:00.879 INFO [stderr] 
Dec 04 15:44:00.879 INFO [stderr] warning: field is never used: `name`
Dec 04 15:44:00.879 INFO [stderr]   --> src/main.rs:93:5
Dec 04 15:44:00.879 INFO [stderr]    |
Dec 04 15:44:00.879 INFO [stderr] 93 |     name: String,
Dec 04 15:44:00.879 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 04 15:44:00.879 INFO [stderr] 
Dec 04 15:44:00.879 INFO [stderr] warning: field is never used: `op_set`
Dec 04 15:44:00.879 INFO [stderr]   --> src/main.rs:94:5
Dec 04 15:44:00.879 INFO [stderr]    |
Dec 04 15:44:00.879 INFO [stderr] 94 |     op_set: HashSet<String>,
Dec 04 15:44:00.879 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 15:44:00.879 INFO [stderr] 
Dec 04 15:44:01.107 INFO [stderr] warning: field is never used: `name`
Dec 04 15:44:01.107 INFO [stderr]   --> src/main.rs:46:5
Dec 04 15:44:01.107 INFO [stderr]    |
Dec 04 15:44:01.107 INFO [stderr] 46 |     name: String,
Dec 04 15:44:01.107 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 04 15:44:01.107 INFO [stderr]    |
Dec 04 15:44:01.107 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 15:44:01.107 INFO [stderr] 
Dec 04 15:44:01.107 INFO [stderr] warning: field is never used: `name`
Dec 04 15:44:01.107 INFO [stderr]   --> src/main.rs:93:5
Dec 04 15:44:01.107 INFO [stderr]    |
Dec 04 15:44:01.107 INFO [stderr] 93 |     name: String,
Dec 04 15:44:01.107 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 04 15:44:01.107 INFO [stderr] 
Dec 04 15:44:01.107 INFO [stderr] warning: field is never used: `op_set`
Dec 04 15:44:01.107 INFO [stderr]   --> src/main.rs:94:5
Dec 04 15:44:01.107 INFO [stderr]    |
Dec 04 15:44:01.107 INFO [stderr] 94 |     op_set: HashSet<String>,
Dec 04 15:44:01.107 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 15:44:01.107 INFO [stderr] 
Dec 04 15:44:01.131 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
Dec 04 15:44:01.134 INFO [stderr] su: No module specific data is present
Dec 04 15:44:01.763 INFO running `"docker" "inspect" "eae774e91444be4c21dba694f7c2b0ede3c380d97fd945403c7ccca3d90c7a29"`
Dec 04 15:44:02.061 INFO running `"docker" "rm" "-f" "eae774e91444be4c21dba694f7c2b0ede3c380d97fd945403c7ccca3d90c7a29"`
Dec 04 15:44:02.405 INFO [stdout] eae774e91444be4c21dba694f7c2b0ede3c380d97fd945403c7ccca3d90c7a29