[INFO] fetching crate csv_challenge 0.1.0...
[INFO] extracting crate csv_challenge 0.1.0 into work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/reg/csv_challenge/0.1.0
[INFO] extracting crate csv_challenge 0.1.0 into work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/reg/csv_challenge/0.1.0
[INFO] validating manifest of csv_challenge-0.1.0 on toolchain master#c0086b9e8972fef9fd4af24bae20d45021ed06c6
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of csv_challenge-0.1.0 on toolchain try#290ac7b29f41ff9fa5232f9a1116ea71a3501063
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing csv_challenge-0.1.0
[INFO] finished frobbing csv_challenge-0.1.0
[INFO] frobbed toml for csv_challenge-0.1.0 written to work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/reg/csv_challenge/0.1.0/Cargo.toml
[INFO] started frobbing csv_challenge-0.1.0
[INFO] finished frobbing csv_challenge-0.1.0
[INFO] frobbed toml for csv_challenge-0.1.0 written to work/ex/pr-58899/sources/try#290ac7b29f41ff9fa5232f9a1116ea71a3501063/reg/csv_challenge/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+290ac7b29f41ff9fa5232f9a1116ea71a3501063-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking csv_challenge-0.1.0 against master#c0086b9e8972fef9fd4af24bae20d45021ed06c6 for pr-58899
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58899/worker-1/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58899/sources/master#c0086b9e8972fef9fd4af24bae20d45021ed06c6/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" "+c0086b9e8972fef9fd4af24bae20d45021ed06c6-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 05b24e1fea31aae2a28fdbb0db3b56b996857aeed90eea97845c484f474c4c33
[INFO] running `"docker" "start" "-a" "05b24e1fea31aae2a28fdbb0db3b56b996857aeed90eea97845c484f474c4c33"`
[INFO] [stderr]     Checking csv_challenge v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `filename`
[INFO] [stderr]   --> src/core/read.rs:68:13
[INFO] [stderr]    |
[INFO] [stderr] 68 |         let filename = PathBuf::from("./input/challenge.csv");
[INFO] [stderr]    |             ^^^^^^^^ help: consider prefixing with an underscore: `_filename`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Opt`
[INFO] [stderr]  --> benches/file_op_bench.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Opt,
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Opt`
[INFO] [stderr]  --> tests/integration_test.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |         Opt,
[INFO] [stderr]   |         ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> benches/file_op_bench.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     load_csv(filename);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> benches/file_op_bench.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     write_csv(&modified_data, "output/test.csv");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.87s
[INFO] running `"docker" "inspect" "05b24e1fea31aae2a28fdbb0db3b56b996857aeed90eea97845c484f474c4c33"`
[INFO] running `"docker" "rm" "-f" "05b24e1fea31aae2a28fdbb0db3b56b996857aeed90eea97845c484f474c4c33"`
[INFO] [stdout] 05b24e1fea31aae2a28fdbb0db3b56b996857aeed90eea97845c484f474c4c33