Nov 28 02:22:28.977 INFO checking kk1fff/backprop against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 28 02:22:28.977 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-2/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/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 +db42d4dad33013eba11ef37342ad9f614e5652b8-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"`
Nov 28 02:22:29.145 INFO [stdout] 778cc40ddeb81d3c0baad8246a6c33614dd8e36213e38e4d1d9bb2c0666f652b
Nov 28 02:22:29.146 INFO running `"docker" "start" "-a" "778cc40ddeb81d3c0baad8246a6c33614dd8e36213e38e4d1d9bb2c0666f652b"`
Nov 28 02:22:29.599 INFO [stderr] usermod: no changes
Nov 28 02:22:29.627 INFO [stderr]     Checking backprop v0.1.0 (/source)
Nov 28 02:22:29.960 INFO [stderr] warning: field is never used: `name`
Nov 28 02:22:29.961 INFO [stderr]   --> src/main.rs:46:5
Nov 28 02:22:29.961 INFO [stderr]    |
Nov 28 02:22:29.963 INFO [stderr] 46 |     name: String,
Nov 28 02:22:29.963 INFO [stderr]    |     ^^^^^^^^^^^^
Nov 28 02:22:29.964 INFO [stderr]    |
Nov 28 02:22:29.964 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 28 02:22:29.965 INFO [stderr] 
Nov 28 02:22:29.965 INFO [stderr] warning: field is never used: `name`
Nov 28 02:22:29.965 INFO [stderr]   --> src/main.rs:93:5
Nov 28 02:22:29.966 INFO [stderr]    |
Nov 28 02:22:29.966 INFO [stderr] 93 |     name: String,
Nov 28 02:22:29.966 INFO [stderr]    |     ^^^^^^^^^^^^
Nov 28 02:22:29.966 INFO [stderr] 
Nov 28 02:22:29.966 INFO [stderr] warning: field is never used: `op_set`
Nov 28 02:22:29.967 INFO [stderr]   --> src/main.rs:94:5
Nov 28 02:22:29.967 INFO [stderr]    |
Nov 28 02:22:29.967 INFO [stderr] 94 |     op_set: HashSet<String>,
Nov 28 02:22:29.967 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 02:22:29.967 INFO [stderr] 
Nov 28 02:22:29.977 INFO [stderr] warning: field is never used: `name`
Nov 28 02:22:29.977 INFO [stderr]   --> src/main.rs:46:5
Nov 28 02:22:29.977 INFO [stderr]    |
Nov 28 02:22:29.978 INFO [stderr] 46 |     name: String,
Nov 28 02:22:29.978 INFO [stderr]    |     ^^^^^^^^^^^^
Nov 28 02:22:29.978 INFO [stderr]    |
Nov 28 02:22:29.978 INFO [stderr]    = note: #[warn(dead_code)] on by default
Nov 28 02:22:29.979 INFO [stderr] 
Nov 28 02:22:29.979 INFO [stderr] warning: field is never used: `name`
Nov 28 02:22:29.979 INFO [stderr]   --> src/main.rs:93:5
Nov 28 02:22:29.979 INFO [stderr]    |
Nov 28 02:22:29.980 INFO [stderr] 93 |     name: String,
Nov 28 02:22:29.980 INFO [stderr]    |     ^^^^^^^^^^^^
Nov 28 02:22:29.980 INFO [stderr] 
Nov 28 02:22:29.980 INFO [stderr] warning: field is never used: `op_set`
Nov 28 02:22:29.981 INFO [stderr]   --> src/main.rs:94:5
Nov 28 02:22:29.981 INFO [stderr]    |
Nov 28 02:22:29.981 INFO [stderr] 94 |     op_set: HashSet<String>,
Nov 28 02:22:29.981 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 02:22:29.981 INFO [stderr] 
Nov 28 02:22:29.996 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.37s
Nov 28 02:22:30.002 INFO [stderr] su: No module specific data is present
Nov 28 02:22:30.417 INFO running `"docker" "inspect" "778cc40ddeb81d3c0baad8246a6c33614dd8e36213e38e4d1d9bb2c0666f652b"`
Nov 28 02:22:30.558 INFO running `"docker" "rm" "-f" "778cc40ddeb81d3c0baad8246a6c33614dd8e36213e38e4d1d9bb2c0666f652b"`
Nov 28 02:22:30.671 INFO [stdout] 778cc40ddeb81d3c0baad8246a6c33614dd8e36213e38e4d1d9bb2c0666f652b