Dec 05 02:30:59.387 INFO checking Flecheck/Sudoku against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 05 02:30:59.387 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-6/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/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 +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-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 05 02:30:59.913 INFO [stdout] 2e501c757246980083d0cd4e144ff0754e21364ba58e7cd2bd4f3598795de14e
Dec 05 02:30:59.915 INFO running `"docker" "start" "-a" "2e501c757246980083d0cd4e144ff0754e21364ba58e7cd2bd4f3598795de14e"`
Dec 05 02:31:02.139 INFO [stderr] usermod: no changes
Dec 05 02:31:02.259 INFO [stderr]     Checking indexmap v0.4.1
Dec 05 02:31:03.695 INFO [stderr]     Checking priority-queue v0.5.1
Dec 05 02:31:04.399 INFO [stderr]     Checking sudoku v0.1.0 (/source)
Dec 05 02:31:05.343 INFO [stderr] warning: unused import: `std::time::Duration`
Dec 05 02:31:05.343 INFO [stderr]   --> src/main.rs:16:5
Dec 05 02:31:05.343 INFO [stderr]    |
Dec 05 02:31:05.343 INFO [stderr] 16 | use std::time::Duration;
Dec 05 02:31:05.343 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 05 02:31:05.343 INFO [stderr]    |
Dec 05 02:31:05.343 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 05 02:31:05.343 INFO [stderr] 
Dec 05 02:31:05.343 INFO [stderr] warning: unused import: `std::time::Instant`
Dec 05 02:31:05.343 INFO [stderr]   --> src/main.rs:17:5
Dec 05 02:31:05.343 INFO [stderr]    |
Dec 05 02:31:05.343 INFO [stderr] 17 | use std::time::Instant;
Dec 05 02:31:05.343 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 05 02:31:05.343 INFO [stderr] 
Dec 05 02:31:05.527 INFO [stderr] warning: unused import: `std::time::Duration`
Dec 05 02:31:05.527 INFO [stderr]   --> src/main.rs:16:5
Dec 05 02:31:05.527 INFO [stderr]    |
Dec 05 02:31:05.527 INFO [stderr] 16 | use std::time::Duration;
Dec 05 02:31:05.527 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 05 02:31:05.527 INFO [stderr]    |
Dec 05 02:31:05.527 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 05 02:31:05.527 INFO [stderr] 
Dec 05 02:31:05.527 INFO [stderr] warning: unused import: `std::time::Instant`
Dec 05 02:31:05.527 INFO [stderr]   --> src/main.rs:17:5
Dec 05 02:31:05.527 INFO [stderr]    |
Dec 05 02:31:05.527 INFO [stderr] 17 | use std::time::Instant;
Dec 05 02:31:05.527 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 05 02:31:05.527 INFO [stderr] 
Dec 05 02:31:05.775 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 02:31:05.775 INFO [stderr]   --> src/main.rs:43:9
Dec 05 02:31:05.775 INFO [stderr]    |
Dec 05 02:31:05.775 INFO [stderr] 43 |         writeln!(stdout, "{}", res);
Dec 05 02:31:05.775 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 02:31:05.775 INFO [stderr]    |
Dec 05 02:31:05.775 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 05 02:31:05.775 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 02:31:05.775 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 02:31:05.775 INFO [stderr] 
Dec 05 02:31:05.991 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 02:31:05.991 INFO [stderr]   --> src/main.rs:43:9
Dec 05 02:31:05.991 INFO [stderr]    |
Dec 05 02:31:05.991 INFO [stderr] 43 |         writeln!(stdout, "{}", res);
Dec 05 02:31:05.991 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 02:31:05.992 INFO [stderr]    |
Dec 05 02:31:05.992 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 05 02:31:05.992 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 02:31:05.992 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 02:31:05.992 INFO [stderr] 
Dec 05 02:31:06.023 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.85s
Dec 05 02:31:06.023 INFO [stderr] su: No module specific data is present
Dec 05 02:31:06.931 INFO running `"docker" "inspect" "2e501c757246980083d0cd4e144ff0754e21364ba58e7cd2bd4f3598795de14e"`
Dec 05 02:31:07.149 INFO running `"docker" "rm" "-f" "2e501c757246980083d0cd4e144ff0754e21364ba58e7cd2bd4f3598795de14e"`
Dec 05 02:31:07.471 INFO [stdout] 2e501c757246980083d0cd4e144ff0754e21364ba58e7cd2bd4f3598795de14e