Nov 07 16:17:52.148 INFO checking csv_challenge-0.1.0 against master#24e66c28980442a48d9458f1a4f9b76cc722dc8a for pr-55687
Nov 07 16:17:52.148 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-55687/worker-3/master#24e66c28980442a48d9458f1a4f9b76cc722dc8a:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-55687/master#24e66c28980442a48d9458f1a4f9b76cc722dc8a:/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 +24e66c28980442a48d9458f1a4f9b76cc722dc8a-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 07 16:17:52.364 INFO blam! fe52befaf2fedca598d2bc4141eeb1bc14519b11adf554563d9b12cdc5414594
Nov 07 16:17:52.365 INFO running `"docker" "start" "-a" "fe52befaf2fedca598d2bc4141eeb1bc14519b11adf554563d9b12cdc5414594"`
Nov 07 16:17:53.452 INFO kablam! usermod: no changes
Nov 07 16:17:53.607 INFO kablam!     Checking csv_challenge v0.1.0 (/source)
Nov 07 16:17:55.168 INFO kablam! warning: unused variable: `filename`
Nov 07 16:17:55.168 INFO kablam!   --> src/core/read.rs:68:13
Nov 07 16:17:55.168 INFO kablam!    |
Nov 07 16:17:55.168 INFO kablam! 68 |         let filename = PathBuf::from("./input/challenge.csv");
Nov 07 16:17:55.168 INFO kablam!    |             ^^^^^^^^ help: consider using `_filename` instead
Nov 07 16:17:55.168 INFO kablam!    |
Nov 07 16:17:55.168 INFO kablam!    = note: #[warn(unused_variables)] on by default
Nov 07 16:17:55.168 INFO kablam! 
Nov 07 16:17:57.788 INFO kablam! error[E0658]: use of extern prelude names introduced with `extern crate` items is unstable (see issue #54658)
Nov 07 16:17:57.788 INFO kablam!  --> benches/file_op_bench.rs:3:5
Nov 07 16:17:57.788 INFO kablam!   |
Nov 07 16:17:57.788 INFO kablam! 3 | use test::Bencher;
Nov 07 16:17:57.788 INFO kablam!   |     ^^^^
Nov 07 16:17:57.788 INFO kablam!   |
Nov 07 16:17:57.788 INFO kablam!   = help: add #![feature(extern_crate_item_prelude)] to the crate attributes to enable
Nov 07 16:17:57.788 INFO kablam! 
Nov 07 16:17:57.788 INFO kablam! warning: unused import: `Opt`
Nov 07 16:17:57.788 INFO kablam!  --> benches/file_op_bench.rs:6:5
Nov 07 16:17:57.788 INFO kablam!   |
Nov 07 16:17:57.788 INFO kablam! 6 |     Opt,
Nov 07 16:17:57.788 INFO kablam!   |     ^^^
Nov 07 16:17:57.788 INFO kablam!   |
Nov 07 16:17:57.788 INFO kablam!   = note: #[warn(unused_imports)] on by default
Nov 07 16:17:57.788 INFO kablam! 
Nov 07 16:17:57.822 INFO kablam! error: aborting due to previous error
Nov 07 16:17:57.822 INFO kablam! 
Nov 07 16:17:57.822 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Nov 07 16:17:57.828 INFO kablam! error: Could not compile `csv_challenge`.
Nov 07 16:17:57.828 INFO kablam! warning: build failed, waiting for other jobs to finish...
Nov 07 16:17:57.840 INFO kablam! warning: unused import: `Opt`
Nov 07 16:17:57.840 INFO kablam!  --> tests/integration_test.rs:6:9
Nov 07 16:17:57.840 INFO kablam!   |
Nov 07 16:17:57.840 INFO kablam! 6 |         Opt,
Nov 07 16:17:57.840 INFO kablam!   |         ^^^
Nov 07 16:17:57.840 INFO kablam!   |
Nov 07 16:17:57.840 INFO kablam!   = note: #[warn(unused_imports)] on by default
Nov 07 16:17:57.840 INFO kablam! 
Nov 07 16:17:57.895 INFO kablam! error: build failed
Nov 07 16:17:57.897 INFO kablam! su: No module specific data is present
Nov 07 16:17:58.150 INFO running `"docker" "rm" "-f" "fe52befaf2fedca598d2bc4141eeb1bc14519b11adf554563d9b12cdc5414594"`
Nov 07 16:17:58.247 INFO blam! fe52befaf2fedca598d2bc4141eeb1bc14519b11adf554563d9b12cdc5414594