Dec 12 16:08:55.189 INFO checking csv_challenge-0.1.0 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 16:08:55.189 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 12 16:08:55.380 INFO [stdout] 614cc84b05cf66ab09960c8ff411d48f15b7df9d843dc2e091ca8e88670ba07f
Dec 12 16:08:55.387 INFO running `"docker" "start" "-a" "614cc84b05cf66ab09960c8ff411d48f15b7df9d843dc2e091ca8e88670ba07f"`
Dec 12 16:08:55.949 INFO [stderr] usermod: no changes
Dec 12 16:08:56.136 INFO [stderr]     Checking csv_challenge v0.1.0 (/source)
Dec 12 16:08:57.738 INFO [stderr] warning: unused variable: `filename`
Dec 12 16:08:57.738 INFO [stderr]   --> src/core/read.rs:68:13
Dec 12 16:08:57.738 INFO [stderr]    |
Dec 12 16:08:57.738 INFO [stderr] 68 |         let filename = PathBuf::from("./input/challenge.csv");
Dec 12 16:08:57.738 INFO [stderr]    |             ^^^^^^^^ help: consider using `_filename` instead
Dec 12 16:08:57.738 INFO [stderr]    |
Dec 12 16:08:57.738 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 12 16:08:57.738 INFO [stderr] 
Dec 12 16:08:59.631 INFO [stderr] warning: unused import: `Opt`
Dec 12 16:08:59.631 INFO [stderr]  --> benches/file_op_bench.rs:6:5
Dec 12 16:08:59.631 INFO [stderr]   |
Dec 12 16:08:59.631 INFO [stderr] 6 |     Opt,
Dec 12 16:08:59.631 INFO [stderr]   |     ^^^
Dec 12 16:08:59.631 INFO [stderr]   |
Dec 12 16:08:59.631 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 12 16:08:59.632 INFO [stderr] 
Dec 12 16:08:59.705 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 16:08:59.705 INFO [stderr]   --> benches/file_op_bench.rs:19:5
Dec 12 16:08:59.705 INFO [stderr]    |
Dec 12 16:08:59.705 INFO [stderr] 19 |     load_csv(filename);
Dec 12 16:08:59.705 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 12 16:08:59.705 INFO [stderr]    |
Dec 12 16:08:59.705 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 12 16:08:59.705 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 16:08:59.705 INFO [stderr] 
Dec 12 16:08:59.705 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 12 16:08:59.705 INFO [stderr]   --> benches/file_op_bench.rs:33:5
Dec 12 16:08:59.705 INFO [stderr]    |
Dec 12 16:08:59.705 INFO [stderr] 33 |     write_csv(&modified_data, "output/test.csv");
Dec 12 16:08:59.705 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 16:08:59.705 INFO [stderr]    |
Dec 12 16:08:59.705 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 12 16:08:59.705 INFO [stderr] 
Dec 12 16:08:59.938 INFO [stderr] warning: unused import: `Opt`
Dec 12 16:08:59.938 INFO [stderr]  --> tests/integration_test.rs:6:9
Dec 12 16:08:59.938 INFO [stderr]   |
Dec 12 16:08:59.938 INFO [stderr] 6 |         Opt,
Dec 12 16:08:59.938 INFO [stderr]   |         ^^^
Dec 12 16:08:59.938 INFO [stderr]   |
Dec 12 16:08:59.938 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 12 16:08:59.938 INFO [stderr] 
Dec 12 16:09:00.404 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.41s
Dec 12 16:09:00.424 INFO [stderr] su: No module specific data is present
Dec 12 16:09:00.746 INFO running `"docker" "inspect" "614cc84b05cf66ab09960c8ff411d48f15b7df9d843dc2e091ca8e88670ba07f"`
Dec 12 16:09:00.868 INFO running `"docker" "rm" "-f" "614cc84b05cf66ab09960c8ff411d48f15b7df9d843dc2e091ca8e88670ba07f"`
Dec 12 16:09:00.952 INFO [stdout] 614cc84b05cf66ab09960c8ff411d48f15b7df9d843dc2e091ca8e88670ba07f