Nov 02 00:10:11.137 INFO checking csv_challenge-0.1.0 against master#05812fa8c588473f03e3fa7cf59cd84f4f37c715 for pr-55538
Nov 02 00:10:11.137 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55538/worker-4/master#05812fa8c588473f03e3fa7cf59cd84f4f37c715:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-55538/master#05812fa8c588473f03e3fa7cf59cd84f4f37c715:/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 +05812fa8c588473f03e3fa7cf59cd84f4f37c715-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 02 00:10:11.308 INFO blam! fcb2630104e7a4a36d3c0f763bc91d1d2da97cb619dc95a8df53bb5702b02fa2
Nov 02 00:10:11.309 INFO running `"docker" "start" "-a" "fcb2630104e7a4a36d3c0f763bc91d1d2da97cb619dc95a8df53bb5702b02fa2"`
Nov 02 00:10:11.828 INFO kablam! usermod: no changes
Nov 02 00:10:11.943 INFO kablam!     Checking csv_challenge v0.1.0 (/source)
Nov 02 00:10:14.020 INFO kablam! warning: unused variable: `filename`
Nov 02 00:10:14.020 INFO kablam!   --> src/core/read.rs:68:13
Nov 02 00:10:14.020 INFO kablam!    |
Nov 02 00:10:14.020 INFO kablam! 68 |         let filename = PathBuf::from("./input/challenge.csv");
Nov 02 00:10:14.020 INFO kablam!    |             ^^^^^^^^ help: consider using `_filename` instead
Nov 02 00:10:14.020 INFO kablam!    |
Nov 02 00:10:14.020 INFO kablam!    = note: #[warn(unused_variables)] on by default
Nov 02 00:10:14.020 INFO kablam! 
Nov 02 00:10:17.116 INFO kablam! error[E0658]: use of extern prelude names introduced with `extern crate` items is unstable (see issue #54658)
Nov 02 00:10:17.116 INFO kablam!  --> benches/file_op_bench.rs:3:5
Nov 02 00:10:17.116 INFO kablam!   |
Nov 02 00:10:17.116 INFO kablam! 3 | use test::Bencher;
Nov 02 00:10:17.116 INFO kablam!   |     ^^^^
Nov 02 00:10:17.116 INFO kablam!   |
Nov 02 00:10:17.116 INFO kablam!   = help: add #![feature(extern_crate_item_prelude)] to the crate attributes to enable
Nov 02 00:10:17.116 INFO kablam! 
Nov 02 00:10:17.116 INFO kablam! warning: unused import: `Opt`
Nov 02 00:10:17.116 INFO kablam!  --> benches/file_op_bench.rs:6:5
Nov 02 00:10:17.116 INFO kablam!   |
Nov 02 00:10:17.116 INFO kablam! 6 |     Opt,
Nov 02 00:10:17.116 INFO kablam!   |     ^^^
Nov 02 00:10:17.116 INFO kablam!   |
Nov 02 00:10:17.116 INFO kablam!   = note: #[warn(unused_imports)] on by default
Nov 02 00:10:17.116 INFO kablam! 
Nov 02 00:10:17.132 INFO kablam! warning: unused import: `Opt`
Nov 02 00:10:17.132 INFO kablam!  --> tests/integration_test.rs:6:9
Nov 02 00:10:17.132 INFO kablam!   |
Nov 02 00:10:17.132 INFO kablam! 6 |         Opt,
Nov 02 00:10:17.132 INFO kablam!   |         ^^^
Nov 02 00:10:17.133 INFO kablam!   |
Nov 02 00:10:17.133 INFO kablam!   = note: #[warn(unused_imports)] on by default
Nov 02 00:10:17.133 INFO kablam! 
Nov 02 00:10:17.160 INFO kablam! error: aborting due to previous error
Nov 02 00:10:17.160 INFO kablam! 
Nov 02 00:10:17.160 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Nov 02 00:10:17.163 INFO kablam! error: Could not compile `csv_challenge`.
Nov 02 00:10:17.163 INFO kablam! warning: build failed, waiting for other jobs to finish...
Nov 02 00:10:17.187 INFO kablam! error: build failed
Nov 02 00:10:17.188 INFO kablam! su: No module specific data is present
Nov 02 00:10:17.561 INFO running `"docker" "rm" "-f" "fcb2630104e7a4a36d3c0f763bc91d1d2da97cb619dc95a8df53bb5702b02fa2"`
Nov 02 00:10:17.692 INFO blam! fcb2630104e7a4a36d3c0f763bc91d1d2da97cb619dc95a8df53bb5702b02fa2