Dec 18 07:38:50.458 INFO checking Flecheck/Sudoku against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 07:38:50.458 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/Flecheck/Sudoku:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 07:38:50.920 INFO [stdout] fa6b0b9858bfb83bbbe21f5f7e90fff3f318ae88fc3c55fe86c749c7f6d85765
Dec 18 07:38:50.926 INFO running `"docker" "start" "-a" "fa6b0b9858bfb83bbbe21f5f7e90fff3f318ae88fc3c55fe86c749c7f6d85765"`
Dec 18 07:38:52.900 INFO [stderr]     Checking indexmap v0.4.1
Dec 18 07:38:54.005 INFO [stderr]     Checking priority-queue v0.5.1
Dec 18 07:38:54.550 INFO [stderr]     Checking sudoku v0.1.0 (/opt/crater/workdir)
Dec 18 07:38:54.936 INFO [stderr] warning: unused import: `std::time::Duration`
Dec 18 07:38:54.937 INFO [stderr]   --> src/main.rs:16:5
Dec 18 07:38:54.937 INFO [stderr]    |
Dec 18 07:38:54.937 INFO [stderr] 16 | use std::time::Duration;
Dec 18 07:38:54.938 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 18 07:38:54.938 INFO [stderr]    |
Dec 18 07:38:54.938 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 18 07:38:54.938 INFO [stderr] 
Dec 18 07:38:54.939 INFO [stderr] warning: unused import: `std::time::Instant`
Dec 18 07:38:54.939 INFO [stderr]   --> src/main.rs:17:5
Dec 18 07:38:54.939 INFO [stderr]    |
Dec 18 07:38:54.940 INFO [stderr] 17 | use std::time::Instant;
Dec 18 07:38:54.940 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 18 07:38:54.940 INFO [stderr] 
Dec 18 07:38:54.960 INFO [stderr] warning: unused import: `std::time::Duration`
Dec 18 07:38:54.961 INFO [stderr]   --> src/main.rs:16:5
Dec 18 07:38:54.961 INFO [stderr]    |
Dec 18 07:38:54.961 INFO [stderr] 16 | use std::time::Duration;
Dec 18 07:38:54.961 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 18 07:38:54.962 INFO [stderr]    |
Dec 18 07:38:54.962 INFO [stderr]    = note: #[warn(unused_imports)] on by default
Dec 18 07:38:54.962 INFO [stderr] 
Dec 18 07:38:54.962 INFO [stderr] warning: unused import: `std::time::Instant`
Dec 18 07:38:54.962 INFO [stderr]   --> src/main.rs:17:5
Dec 18 07:38:54.962 INFO [stderr]    |
Dec 18 07:38:54.962 INFO [stderr] 17 | use std::time::Instant;
Dec 18 07:38:54.963 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 18 07:38:54.963 INFO [stderr] 
Dec 18 07:38:55.299 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 07:38:55.299 INFO [stderr]   --> src/main.rs:43:9
Dec 18 07:38:55.299 INFO [stderr]    |
Dec 18 07:38:55.299 INFO [stderr] 43 |         writeln!(stdout, "{}", res);
Dec 18 07:38:55.299 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 07:38:55.299 INFO [stderr]    |
Dec 18 07:38:55.300 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 07:38:55.300 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 07:38:55.300 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 18 07:38:55.300 INFO [stderr] 
Dec 18 07:38:55.314 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 07:38:55.315 INFO [stderr]   --> src/main.rs:43:9
Dec 18 07:38:55.315 INFO [stderr]    |
Dec 18 07:38:55.315 INFO [stderr] 43 |         writeln!(stdout, "{}", res);
Dec 18 07:38:55.315 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 07:38:55.316 INFO [stderr]    |
Dec 18 07:38:55.316 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 07:38:55.316 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 07:38:55.316 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 18 07:38:55.317 INFO [stderr] 
Dec 18 07:38:55.365 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.52s
Dec 18 07:38:56.701 INFO running `"docker" "inspect" "fa6b0b9858bfb83bbbe21f5f7e90fff3f318ae88fc3c55fe86c749c7f6d85765"`
Dec 18 07:38:57.020 INFO running `"docker" "rm" "-f" "fa6b0b9858bfb83bbbe21f5f7e90fff3f318ae88fc3c55fe86c749c7f6d85765"`
Dec 18 07:38:57.352 INFO [stdout] fa6b0b9858bfb83bbbe21f5f7e90fff3f318ae88fc3c55fe86c749c7f6d85765