[INFO] cloning repository https://github.com/vcoppe/ddo-caching
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vcoppe/ddo-caching" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvcoppe%2Fddo-caching", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvcoppe%2Fddo-caching'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 366d0b7c22be1c5165a988f4942a391b1ce79ca0
[INFO] testing vcoppe/ddo-caching against 1.94.0 for beta-1.95-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvcoppe%2Fddo-caching" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vcoppe/ddo-caching
[INFO] finished tweaking git repo https://github.com/vcoppe/ddo-caching
[INFO] tweaked toml for git repo https://github.com/vcoppe/ddo-caching written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vcoppe/ddo-caching on toolchain 1.94.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.94.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/vcoppe/ddo-caching already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.94.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.15
[INFO] [stderr]   Downloaded num v0.4.0
[INFO] [stderr]   Downloaded smallbitset v0.5.1
[INFO] [stderr]   Downloaded num-complex v0.4.0
[INFO] [stderr]   Downloaded num-rational v0.4.0
[INFO] [stderr]   Downloaded compare v0.1.0
[INFO] [stderr]   Downloaded binary-heap-plus v0.4.1
[INFO] [stderr]   Downloaded peak_alloc v0.1.0
[INFO] [stderr]   Downloaded ordered-float v3.0.0
[INFO] [stderr]   Downloaded anyhow v1.0.53
[INFO] [stderr]   Downloaded smallvec v1.8.0
[INFO] [stderr]   Downloaded parking_lot_core v0.9.1
[INFO] [stderr]   Downloaded parking_lot v0.12.0
[INFO] [stderr]   Downloaded unicode-segmentation v1.9.0
[INFO] [stderr]   Downloaded once_cell v1.10.0
[INFO] [stderr]   Downloaded bitset-fixed v0.1.0
[INFO] [stderr]   Downloaded lock_api v0.4.6
[INFO] [stderr]   Downloaded syn v1.0.86
[INFO] [stderr]   Downloaded redox_syscall v0.2.11
[INFO] [stderr]   Downloaded libc v0.2.118
[INFO] [stderr]   Downloaded windows-sys v0.32.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.94.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] effa2b8ea4da5b836acd7cfbd690d857fd7653890fcf578925f4a6cce4f7d167
[INFO] running `Command { std: "docker" "start" "-a" "effa2b8ea4da5b836acd7cfbd690d857fd7653890fcf578925f4a6cce4f7d167", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "effa2b8ea4da5b836acd7cfbd690d857fd7653890fcf578925f4a6cce4f7d167", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "effa2b8ea4da5b836acd7cfbd690d857fd7653890fcf578925f4a6cce4f7d167", kill_on_drop: false }`
[INFO] [stdout] effa2b8ea4da5b836acd7cfbd690d857fd7653890fcf578925f4a6cce4f7d167
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.94.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ed7ecfcf85806923cfbeffeccedd743ced331eeefd0e29da3b8088498de74a12
[INFO] running `Command { std: "docker" "start" "-a" "ed7ecfcf85806923cfbeffeccedd743ced331eeefd0e29da3b8088498de74a12", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling libc v0.2.118
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling parking_lot_core v0.9.1
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling lock_api v0.4.6
[INFO] [stderr]    Compiling compare v0.1.0
[INFO] [stderr]    Compiling peak_alloc v0.1.0
[INFO] [stderr]    Compiling bitset-fixed v0.1.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling binary-heap-plus v0.4.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling ordered-float v3.0.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling parking_lot v0.12.0
[INFO] [stderr]    Compiling num v0.4.0
[INFO] [stderr]    Compiling smallbitset v0.5.1
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling structopt v0.3.26
[INFO] [stderr]    Compiling engineering v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils.rs:41:20
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn new(bs: &BitSet) -> BitSetIter {
[INFO] [stdout]    |                    ^^^^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn new(bs: &BitSet) -> BitSetIter<'_> {
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.72s
[INFO] running `Command { std: "docker" "inspect" "ed7ecfcf85806923cfbeffeccedd743ced331eeefd0e29da3b8088498de74a12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed7ecfcf85806923cfbeffeccedd743ced331eeefd0e29da3b8088498de74a12", kill_on_drop: false }`
[INFO] [stdout] ed7ecfcf85806923cfbeffeccedd743ced331eeefd0e29da3b8088498de74a12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.94.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 536a81a360b88af38b0e56922644bcb8fc267c6ea2a1ef0852f876b9e81b8361
[INFO] running `Command { std: "docker" "start" "-a" "536a81a360b88af38b0e56922644bcb8fc267c6ea2a1ef0852f876b9e81b8361", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling anyhow v1.0.53
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling once_cell v1.10.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils.rs:41:20
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn new(bs: &BitSet) -> BitSetIter {
[INFO] [stdout]    |                    ^^^^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn new(bs: &BitSet) -> BitSetIter<'_> {
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling thread_local v1.1.4
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling engineering v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `optimum` and `nb_orders` are never read
[INFO] [stdout]    --> examples/psp/psp.rs:100:9
[INFO] [stdout]     |
[INFO] [stdout]  99 | pub struct Psp {
[INFO] [stdout]     |            --- fields in this struct
[INFO] [stdout] 100 |     pub optimum: Option<usize>,
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 103 |     pub nb_orders: usize,
[INFO] [stdout]     |         ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Psp` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/utils.rs:41:20
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn new(bs: &BitSet) -> BitSetIter {
[INFO] [stdout]    |                    ^^^^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn new(bs: &BitSet) -> BitSetIter<'_> {
[INFO] [stdout]    |                                          ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 11.83s
[INFO] running `Command { std: "docker" "inspect" "536a81a360b88af38b0e56922644bcb8fc267c6ea2a1ef0852f876b9e81b8361", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "536a81a360b88af38b0e56922644bcb8fc267c6ea2a1ef0852f876b9e81b8361", kill_on_drop: false }`
[INFO] [stdout] 536a81a360b88af38b0e56922644bcb8fc267c6ea2a1ef0852f876b9e81b8361
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.94.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f1ebbcaaf2c21f428b1a26f8ec12acd88a72b7938c849c147a726a782d478314
[INFO] running `Command { std: "docker" "start" "-a" "f1ebbcaaf2c21f428b1a26f8ec12acd88a72b7938c849c147a726a782d478314", kill_on_drop: false }`
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/utils.rs:41:20
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn new(bs: &BitSet) -> BitSetIter {
[INFO] [stderr]    |                    ^^^^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                    |
[INFO] [stderr]    |                    the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn new(bs: &BitSet) -> BitSetIter<'_> {
[INFO] [stderr]    |                                          ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `engineering` (lib) generated 1 warning (run `cargo fix --lib -p engineering` to apply 1 suggestion)
[INFO] [stderr] warning: `engineering` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr] warning: fields `optimum` and `nb_orders` are never read
[INFO] [stderr]    --> examples/psp/psp.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr]  99 | pub struct Psp {
[INFO] [stderr]     |            --- fields in this struct
[INFO] [stderr] 100 |     pub optimum: Option<usize>,
[INFO] [stderr]     |         ^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 103 |     pub nb_orders: usize,
[INFO] [stderr]     |         ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Psp` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `engineering` (example "psp") generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/engineering-4533c069f89b1e6a)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test mdd::node_flags::test_node_flags::add_turns_one_or_more_flags_on ... ok
[INFO] [stderr]    Doc-tests engineering
[INFO] [stdout] test mdd::node_flags::test_node_flags::by_default_only_the_exact_flag_is_on ... ok
[INFO] [stdout] test mdd::node_flags::test_node_flags::at_creation_time_marked_flag_is_never_set ... ok
[INFO] [stdout] test mdd::node_flags::test_node_flags::is_exact_iff_marked_so_and_not_relaxed ... ok
[INFO] [stdout] test mdd::node_flags::test_node_flags::is_relaxed_iff_created_or_marked_relaxed ... ok
[INFO] [stdout] test mdd::node_flags::test_node_flags::new_can_be_relaxed_or_not ... ok
[INFO] [stdout] test mdd::node_flags::test_node_flags::remove_turns_one_or_more_flags_off ... ok
[INFO] [stdout] test mdd::node_flags::test_node_flags::is_marked_iff_marked_so ... ok
[INFO] [stdout] test mdd::node_flags::test_node_flags::set_turns_one_or_more_flags_on_or_off ... ok
[INFO] [stdout] test mdd::node_flags::test_node_flags::test_checks_the_value_of_more_than_one_flag ... ok
[INFO] [stdout] test mdd::node_flags::test_node_flags::test_yields_the_value_of_the_flag ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/utils.rs - utils::Matrix (line 168) ... FAILED
[INFO] [stdout] test src/utils.rs - utils::LexBitSet (line 88) ... ok
[INFO] [stdout] test src/utils.rs - utils::BitSetIter (line 13) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/utils.rs - utils::Matrix (line 168) stdout ----
[INFO] [stdout] error[E0432]: unresolved import `ddo`
[INFO] [stdout]    --> src/utils.rs:169:5
[INFO] [stdout]     |
[INFO] [stdout] 169 | use ddo::Matrix;
[INFO] [stdout]     |     ^^^ use of unresolved module or unlinked crate `ddo`
[INFO] [stdout]     |
[INFO] [stdout]     = help: if you wanted to use a crate named `ddo`, use `cargo add ddo` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/utils.rs - utils::Matrix (line 168)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.39s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "f1ebbcaaf2c21f428b1a26f8ec12acd88a72b7938c849c147a726a782d478314", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1ebbcaaf2c21f428b1a26f8ec12acd88a72b7938c849c147a726a782d478314", kill_on_drop: false }`
[INFO] [stdout] f1ebbcaaf2c21f428b1a26f8ec12acd88a72b7938c849c147a726a782d478314
