Dec 18 17:13:56.075 INFO checking csv_challenge-0.1.0 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 17:13:56.075 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/csv_challenge/0.1.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 17:13:56.302 INFO [stdout] 80cec22a0501491a467c91971be0641a734c83af91325d47d740b8bf548aa85d
Dec 18 17:13:56.305 INFO running `"docker" "start" "-a" "80cec22a0501491a467c91971be0641a734c83af91325d47d740b8bf548aa85d"`
Dec 18 17:13:57.109 INFO [stderr]     Checking csv_challenge v0.1.0 (/opt/crater/workdir)
Dec 18 17:13:57.640 INFO [stderr] warning: unused variable: `filename`
Dec 18 17:13:57.640 INFO [stderr]   --> src/core/read.rs:68:13
Dec 18 17:13:57.640 INFO [stderr]    |
Dec 18 17:13:57.640 INFO [stderr] 68 |         let filename = PathBuf::from("./input/challenge.csv");
Dec 18 17:13:57.640 INFO [stderr]    |             ^^^^^^^^ help: consider using `_filename` instead
Dec 18 17:13:57.640 INFO [stderr]    |
Dec 18 17:13:57.640 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 17:13:57.640 INFO [stderr] 
Dec 18 17:13:58.327 INFO [stderr] warning: unused import: `Opt`
Dec 18 17:13:58.327 INFO [stderr]  --> tests/integration_test.rs:6:9
Dec 18 17:13:58.327 INFO [stderr]   |
Dec 18 17:13:58.327 INFO [stderr] 6 |         Opt,
Dec 18 17:13:58.327 INFO [stderr]   |         ^^^
Dec 18 17:13:58.327 INFO [stderr]   |
Dec 18 17:13:58.327 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 17:13:58.327 INFO [stderr] 
Dec 18 17:13:58.411 INFO [stderr] warning: unused import: `Opt`
Dec 18 17:13:58.411 INFO [stderr]  --> benches/file_op_bench.rs:6:5
Dec 18 17:13:58.412 INFO [stderr]   |
Dec 18 17:13:58.412 INFO [stderr] 6 |     Opt,
Dec 18 17:13:58.412 INFO [stderr]   |     ^^^
Dec 18 17:13:58.412 INFO [stderr]   |
Dec 18 17:13:58.412 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 17:13:58.413 INFO [stderr] 
Dec 18 17:13:58.460 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:13:58.460 INFO [stderr]   --> benches/file_op_bench.rs:19:5
Dec 18 17:13:58.460 INFO [stderr]    |
Dec 18 17:13:58.460 INFO [stderr] 19 |     load_csv(filename);
Dec 18 17:13:58.460 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 18 17:13:58.460 INFO [stderr]    |
Dec 18 17:13:58.464 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 17:13:58.464 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:13:58.464 INFO [stderr] 
Dec 18 17:13:58.464 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 17:13:58.464 INFO [stderr]   --> benches/file_op_bench.rs:33:5
Dec 18 17:13:58.464 INFO [stderr]    |
Dec 18 17:13:58.464 INFO [stderr] 33 |     write_csv(&modified_data, "output/test.csv");
Dec 18 17:13:58.464 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 17:13:58.464 INFO [stderr]    |
Dec 18 17:13:58.464 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 17:13:58.464 INFO [stderr] 
Dec 18 17:13:58.569 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.53s
Dec 18 17:13:59.030 INFO running `"docker" "inspect" "80cec22a0501491a467c91971be0641a734c83af91325d47d740b8bf548aa85d"`
Dec 18 17:13:59.097 INFO running `"docker" "rm" "-f" "80cec22a0501491a467c91971be0641a734c83af91325d47d740b8bf548aa85d"`
Dec 18 17:13:59.193 INFO [stdout] 80cec22a0501491a467c91971be0641a734c83af91325d47d740b8bf548aa85d