Dec 19 14:12:43.940 INFO checking koba-e964/rust-number-theory against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 14:12:43.940 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/koba-e964/rust-number-theory:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 14:12:44.216 INFO [stdout] b35a112431ebfaab8b1449ca73f918ad4ba1bf0a65a50fb81fa10ff9989599f5
Dec 19 14:12:44.222 INFO running `"docker" "start" "-a" "b35a112431ebfaab8b1449ca73f918ad4ba1bf0a65a50fb81fa10ff9989599f5"`
Dec 19 14:12:45.082 INFO [stderr]     Checking rust-number-theory v0.1.0 (/opt/crater/workdir)
Dec 19 14:12:45.396 INFO [stderr] warning: unused import: `BigInt`
Dec 19 14:12:45.396 INFO [stderr]  --> src/determinant.rs:3:11
Dec 19 14:12:45.396 INFO [stderr]   |
Dec 19 14:12:45.396 INFO [stderr] 3 | use num::{BigInt, BigRational, One, Zero};
Dec 19 14:12:45.396 INFO [stderr]   |           ^^^^^^
Dec 19 14:12:45.396 INFO [stderr]   |
Dec 19 14:12:45.396 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 14:12:45.396 INFO [stderr] 
Dec 19 14:12:45.468 INFO [stderr] warning: unused import: `num::BigInt`
Dec 19 14:12:45.496 INFO [stderr]    --> src/algebraic.rs:137:9
Dec 19 14:12:45.496 INFO [stderr]     |
Dec 19 14:12:45.496 INFO [stderr] 137 |     use num::BigInt;
Dec 19 14:12:45.496 INFO [stderr]     |         ^^^^^^^^^^^
Dec 19 14:12:45.496 INFO [stderr]     |
Dec 19 14:12:45.496 INFO [stderr]     = note: #[warn(unused_imports)] on by default
Dec 19 14:12:45.496 INFO [stderr] 
Dec 19 14:12:45.496 INFO [stderr] warning: unused import: `BigInt`
Dec 19 14:12:45.496 INFO [stderr]  --> src/determinant.rs:3:11
Dec 19 14:12:45.563 INFO [stderr]   |
Dec 19 14:12:45.563 INFO [stderr] 3 | use num::{BigInt, BigRational, One, Zero};
Dec 19 14:12:45.563 INFO [stderr]   |           ^^^^^^
Dec 19 14:12:45.563 INFO [stderr] 
Dec 19 14:12:45.563 INFO [stderr] warning: doc comment not used by rustdoc
Dec 19 14:12:45.563 INFO [stderr]   --> src/determinant.rs:46:9
Dec 19 14:12:45.563 INFO [stderr]    |
Dec 19 14:12:45.563 INFO [stderr] 46 |         /// det((2, -1; 5, -4)) = -3
Dec 19 14:12:45.563 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 14:12:45.563 INFO [stderr]    |
Dec 19 14:12:45.563 INFO [stderr]    = note: #[warn(unused_doc_comments)] on by default
Dec 19 14:12:45.563 INFO [stderr] 
Dec 19 14:12:45.563 INFO [stderr] warning: doc comment not used by rustdoc
Dec 19 14:12:45.563 INFO [stderr]   --> src/determinant.rs:53:9
Dec 19 14:12:45.563 INFO [stderr]    |
Dec 19 14:12:45.563 INFO [stderr] 53 |         /// det((3, 2, 1; -1, 2, 2; -2, -3, 2)) = 33
Dec 19 14:12:45.563 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 14:12:45.563 INFO [stderr] 
Dec 19 14:12:45.915 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
Dec 19 14:12:46.272 INFO running `"docker" "inspect" "b35a112431ebfaab8b1449ca73f918ad4ba1bf0a65a50fb81fa10ff9989599f5"`
Dec 19 14:12:46.352 INFO running `"docker" "rm" "-f" "b35a112431ebfaab8b1449ca73f918ad4ba1bf0a65a50fb81fa10ff9989599f5"`
Dec 19 14:12:46.448 INFO [stdout] b35a112431ebfaab8b1449ca73f918ad4ba1bf0a65a50fb81fa10ff9989599f5