[INFO] updating cached repository koba-e964/rust-number-theory
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/koba-e964/rust-number-theory
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/koba-e964/rust-number-theory" "work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/koba-e964/rust-number-theory"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/koba-e964/rust-number-theory'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/koba-e964/rust-number-theory" "work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/koba-e964/rust-number-theory"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/koba-e964/rust-number-theory'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6585894b5b711fd471dcb52a402a289eca26a1df
[INFO] sha for GitHub repo koba-e964/rust-number-theory: 6585894b5b711fd471dcb52a402a289eca26a1df
[INFO] validating manifest of koba-e964/rust-number-theory on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of koba-e964/rust-number-theory on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing koba-e964/rust-number-theory
[INFO] finished frobbing koba-e964/rust-number-theory
[INFO] frobbed toml for koba-e964/rust-number-theory written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/koba-e964/rust-number-theory/Cargo.toml
[INFO] started frobbing koba-e964/rust-number-theory
[INFO] finished frobbing koba-e964/rust-number-theory
[INFO] frobbed toml for koba-e964/rust-number-theory written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/koba-e964/rust-number-theory/Cargo.toml
[INFO] crate koba-e964/rust-number-theory has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking koba-e964/rust-number-theory against master#f66e4697ae286985ddefc53c3a047614568458bb for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-4/master#f66e4697ae286985ddefc53c3a047614568458bb:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/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" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2719022493d3989686a98301fbdd9d0fce98482bb6a64b17b4ffd2c1505fc940
[INFO] running `"docker" "start" "-a" "2719022493d3989686a98301fbdd9d0fce98482bb6a64b17b4ffd2c1505fc940"`
[INFO] [stderr]    Compiling num-bigint v0.2.1
[INFO] [stderr]     Checking num-rational v0.2.1
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking rust-number-theory v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `BigInt`
[INFO] [stderr]  --> src/determinant.rs:3:11
[INFO] [stderr]   |
[INFO] [stderr] 3 | use num::{BigInt, BigRational, One, Zero};
[INFO] [stderr]   |           ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `num::BigInt`
[INFO] [stderr]    --> src/algebraic.rs:137:9
[INFO] [stderr]     |
[INFO] [stderr] 137 |     use num::BigInt;
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BigInt`
[INFO] [stderr]  --> src/determinant.rs:3:11
[INFO] [stderr]   |
[INFO] [stderr] 3 | use num::{BigInt, BigRational, One, Zero};
[INFO] [stderr]   |           ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: doc comment not used by rustdoc
[INFO] [stderr]   --> src/determinant.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |         /// det((2, -1; 5, -4)) = -3
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: doc comment not used by rustdoc
[INFO] [stderr]   --> src/determinant.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |         /// det((3, 2, 1; -1, 2, 2; -2, -3, 2)) = 33
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.37s
[INFO] running `"docker" "inspect" "2719022493d3989686a98301fbdd9d0fce98482bb6a64b17b4ffd2c1505fc940"`
[INFO] running `"docker" "rm" "-f" "2719022493d3989686a98301fbdd9d0fce98482bb6a64b17b4ffd2c1505fc940"`
[INFO] [stdout] 2719022493d3989686a98301fbdd9d0fce98482bb6a64b17b4ffd2c1505fc940