Dec 04 15:43:58.792 INFO checking kk1fff/backprop against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 15:43:58.792 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/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 15:43:59.264 INFO [stdout] 227ad813672e3b223bbb02c749ca7534fdfd4bf8f92c04ff510a129a9bcab92f
Dec 04 15:43:59.271 INFO running `"docker" "start" "-a" "227ad813672e3b223bbb02c749ca7534fdfd4bf8f92c04ff510a129a9bcab92f"`
Dec 04 15:44:00.411 INFO [stderr] usermod: no changes
Dec 04 15:44:00.475 INFO [stderr]     Checking backprop v0.1.0 (/source)
Dec 04 15:44:01.116 INFO [stderr] warning: field is never used: `name`
Dec 04 15:44:01.116 INFO [stderr]   --> src/main.rs:46:5
Dec 04 15:44:01.116 INFO [stderr]    |
Dec 04 15:44:01.116 INFO [stderr] 46 |     name: String,
Dec 04 15:44:01.116 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 04 15:44:01.116 INFO [stderr]    |
Dec 04 15:44:01.116 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 15:44:01.116 INFO [stderr] 
Dec 04 15:44:01.116 INFO [stderr] warning: field is never used: `name`
Dec 04 15:44:01.116 INFO [stderr]   --> src/main.rs:93:5
Dec 04 15:44:01.116 INFO [stderr]    |
Dec 04 15:44:01.116 INFO [stderr] 93 |     name: String,
Dec 04 15:44:01.116 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 04 15:44:01.116 INFO [stderr] 
Dec 04 15:44:01.116 INFO [stderr] warning: field is never used: `op_set`
Dec 04 15:44:01.116 INFO [stderr]   --> src/main.rs:94:5
Dec 04 15:44:01.116 INFO [stderr]    |
Dec 04 15:44:01.116 INFO [stderr] 94 |     op_set: HashSet<String>,
Dec 04 15:44:01.116 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 15:44:01.116 INFO [stderr] 
Dec 04 15:44:01.207 INFO [stderr] warning: field is never used: `name`
Dec 04 15:44:01.207 INFO [stderr]   --> src/main.rs:46:5
Dec 04 15:44:01.207 INFO [stderr]    |
Dec 04 15:44:01.207 INFO [stderr] 46 |     name: String,
Dec 04 15:44:01.207 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 04 15:44:01.207 INFO [stderr]    |
Dec 04 15:44:01.207 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 04 15:44:01.207 INFO [stderr] 
Dec 04 15:44:01.207 INFO [stderr] warning: field is never used: `name`
Dec 04 15:44:01.207 INFO [stderr]   --> src/main.rs:93:5
Dec 04 15:44:01.207 INFO [stderr]    |
Dec 04 15:44:01.207 INFO [stderr] 93 |     name: String,
Dec 04 15:44:01.207 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 04 15:44:01.207 INFO [stderr] 
Dec 04 15:44:01.207 INFO [stderr] warning: field is never used: `op_set`
Dec 04 15:44:01.207 INFO [stderr]   --> src/main.rs:94:5
Dec 04 15:44:01.207 INFO [stderr]    |
Dec 04 15:44:01.207 INFO [stderr] 94 |     op_set: HashSet<String>,
Dec 04 15:44:01.207 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 15:44:01.207 INFO [stderr] 
Dec 04 15:44:01.242 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
Dec 04 15:44:01.243 INFO [stderr] su: No module specific data is present
Dec 04 15:44:01.885 INFO running `"docker" "inspect" "227ad813672e3b223bbb02c749ca7534fdfd4bf8f92c04ff510a129a9bcab92f"`
Dec 04 15:44:02.313 INFO running `"docker" "rm" "-f" "227ad813672e3b223bbb02c749ca7534fdfd4bf8f92c04ff510a129a9bcab92f"`
Dec 04 15:44:02.631 INFO [stdout] 227ad813672e3b223bbb02c749ca7534fdfd4bf8f92c04ff510a129a9bcab92f