Dec 11 15:24:26.763 INFO checking kk1fff/backprop against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 15:24:26.763 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-1/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/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 15:24:27.115 INFO [stdout] 8ab8a3f7609b09d2fec29270096836787168169ab4e58b756f750834300c1da6
Dec 11 15:24:27.118 INFO running `"docker" "start" "-a" "8ab8a3f7609b09d2fec29270096836787168169ab4e58b756f750834300c1da6"`
Dec 11 15:24:27.987 INFO [stderr] usermod: no changes
Dec 11 15:24:28.056 INFO [stderr]     Checking backprop v0.1.0 (/source)
Dec 11 15:24:28.384 INFO [stderr] warning: field is never used: `name`
Dec 11 15:24:28.384 INFO [stderr]   --> src/main.rs:46:5
Dec 11 15:24:28.384 INFO [stderr]    |
Dec 11 15:24:28.384 INFO [stderr] 46 |     name: String,
Dec 11 15:24:28.384 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 11 15:24:28.384 INFO [stderr]    |
Dec 11 15:24:28.384 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 11 15:24:28.384 INFO [stderr] 
Dec 11 15:24:28.384 INFO [stderr] warning: field is never used: `name`
Dec 11 15:24:28.384 INFO [stderr]   --> src/main.rs:93:5
Dec 11 15:24:28.384 INFO [stderr]    |
Dec 11 15:24:28.384 INFO [stderr] 93 |     name: String,
Dec 11 15:24:28.384 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 11 15:24:28.384 INFO [stderr] 
Dec 11 15:24:28.384 INFO [stderr] warning: field is never used: `op_set`
Dec 11 15:24:28.384 INFO [stderr]   --> src/main.rs:94:5
Dec 11 15:24:28.384 INFO [stderr]    |
Dec 11 15:24:28.384 INFO [stderr] 94 |     op_set: HashSet<String>,
Dec 11 15:24:28.384 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 15:24:28.384 INFO [stderr] 
Dec 11 15:24:28.479 INFO [stderr] warning: field is never used: `name`
Dec 11 15:24:28.479 INFO [stderr]   --> src/main.rs:46:5
Dec 11 15:24:28.479 INFO [stderr]    |
Dec 11 15:24:28.479 INFO [stderr] 46 |     name: String,
Dec 11 15:24:28.479 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 11 15:24:28.479 INFO [stderr]    |
Dec 11 15:24:28.479 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 11 15:24:28.479 INFO [stderr] 
Dec 11 15:24:28.479 INFO [stderr] warning: field is never used: `name`
Dec 11 15:24:28.479 INFO [stderr]   --> src/main.rs:93:5
Dec 11 15:24:28.479 INFO [stderr]    |
Dec 11 15:24:28.479 INFO [stderr] 93 |     name: String,
Dec 11 15:24:28.479 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 11 15:24:28.479 INFO [stderr] 
Dec 11 15:24:28.479 INFO [stderr] warning: field is never used: `op_set`
Dec 11 15:24:28.479 INFO [stderr]   --> src/main.rs:94:5
Dec 11 15:24:28.479 INFO [stderr]    |
Dec 11 15:24:28.479 INFO [stderr] 94 |     op_set: HashSet<String>,
Dec 11 15:24:28.479 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 15:24:28.479 INFO [stderr] 
Dec 11 15:24:28.505 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
Dec 11 15:24:28.508 INFO [stderr] su: No module specific data is present
Dec 11 15:24:29.062 INFO running `"docker" "inspect" "8ab8a3f7609b09d2fec29270096836787168169ab4e58b756f750834300c1da6"`
Dec 11 15:24:29.374 INFO running `"docker" "rm" "-f" "8ab8a3f7609b09d2fec29270096836787168169ab4e58b756f750834300c1da6"`
Dec 11 15:24:29.700 INFO [stdout] 8ab8a3f7609b09d2fec29270096836787168169ab4e58b756f750834300c1da6