Dec 05 14:52:05.293 INFO checking csv_challenge-0.1.0 against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 05 14:52:05.293 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-4/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/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 05 14:52:05.511 INFO [stdout] b0742ba6f838b7461fdc03d1f0628e0d0abceafa5645fbd07f088528431a7fa5
Dec 05 14:52:05.513 INFO running `"docker" "start" "-a" "b0742ba6f838b7461fdc03d1f0628e0d0abceafa5645fbd07f088528431a7fa5"`
Dec 05 14:52:05.881 INFO [stderr] usermod: no changes
Dec 05 14:52:05.941 INFO [stderr]     Checking csv_challenge v0.1.0 (/source)
Dec 05 14:52:07.959 INFO [stderr] warning: unused variable: `filename`
Dec 05 14:52:07.959 INFO [stderr]   --> src/core/read.rs:68:13
Dec 05 14:52:07.959 INFO [stderr]    |
Dec 05 14:52:07.959 INFO [stderr] 68 |         let filename = PathBuf::from("./input/challenge.csv");
Dec 05 14:52:07.959 INFO [stderr]    |             ^^^^^^^^ help: consider using `_filename` instead
Dec 05 14:52:07.959 INFO [stderr]    |
Dec 05 14:52:07.959 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 05 14:52:07.959 INFO [stderr] 
Dec 05 14:52:10.583 INFO [stderr] warning: unused import: `Opt`
Dec 05 14:52:10.583 INFO [stderr]  --> benches/file_op_bench.rs:6:5
Dec 05 14:52:10.583 INFO [stderr]   |
Dec 05 14:52:10.584 INFO [stderr] 6 |     Opt,
Dec 05 14:52:10.584 INFO [stderr]   |     ^^^
Dec 05 14:52:10.584 INFO [stderr]   |
Dec 05 14:52:10.584 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 05 14:52:10.585 INFO [stderr] 
Dec 05 14:52:10.633 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 14:52:10.633 INFO [stderr]   --> benches/file_op_bench.rs:19:5
Dec 05 14:52:10.634 INFO [stderr]    |
Dec 05 14:52:10.634 INFO [stderr] 19 |     load_csv(filename);
Dec 05 14:52:10.634 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 05 14:52:10.635 INFO [stderr]    |
Dec 05 14:52:10.635 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 05 14:52:10.635 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 14:52:10.635 INFO [stderr] 
Dec 05 14:52:10.635 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 14:52:10.635 INFO [stderr]   --> benches/file_op_bench.rs:33:5
Dec 05 14:52:10.635 INFO [stderr]    |
Dec 05 14:52:10.635 INFO [stderr] 33 |     write_csv(&modified_data, "output/test.csv");
Dec 05 14:52:10.635 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 14:52:10.635 INFO [stderr]    |
Dec 05 14:52:10.635 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 14:52:10.635 INFO [stderr] 
Dec 05 14:52:10.848 INFO [stderr] warning: unused import: `Opt`
Dec 05 14:52:10.848 INFO [stderr]  --> tests/integration_test.rs:6:9
Dec 05 14:52:10.848 INFO [stderr]   |
Dec 05 14:52:10.848 INFO [stderr] 6 |         Opt,
Dec 05 14:52:10.848 INFO [stderr]   |         ^^^
Dec 05 14:52:10.848 INFO [stderr]   |
Dec 05 14:52:10.848 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 05 14:52:10.848 INFO [stderr] 
Dec 05 14:52:10.895 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.99s
Dec 05 14:52:10.900 INFO [stderr] su: No module specific data is present
Dec 05 14:52:11.122 INFO running `"docker" "inspect" "b0742ba6f838b7461fdc03d1f0628e0d0abceafa5645fbd07f088528431a7fa5"`
Dec 05 14:52:11.209 INFO running `"docker" "rm" "-f" "b0742ba6f838b7461fdc03d1f0628e0d0abceafa5645fbd07f088528431a7fa5"`
Dec 05 14:52:11.299 INFO [stdout] b0742ba6f838b7461fdc03d1f0628e0d0abceafa5645fbd07f088528431a7fa5