[INFO] cloning repository https://github.com/iljakuklic/cover
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iljakuklic/cover" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filjakuklic%2Fcover", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filjakuklic%2Fcover'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] af613e74518207ac289c30e616d6dadf4fa54bc5
[INFO] testing iljakuklic/cover against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filjakuklic%2Fcover" "/workspace/builds/worker-67/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-67/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iljakuklic/cover on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/iljakuklic/cover
[INFO] finished tweaking git repo https://github.com/iljakuklic/cover
[INFO] tweaked toml for git repo https://github.com/iljakuklic/cover written to /workspace/builds/worker-67/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/iljakuklic/sorted-iter`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a674d3a55bac50a36ac32a06264aafb00b67afbc8b223ea3a4ab78de744c1631
[INFO] running `Command { std: "docker" "start" "-a" "a674d3a55bac50a36ac32a06264aafb00b67afbc8b223ea3a4ab78de744c1631", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a674d3a55bac50a36ac32a06264aafb00b67afbc8b223ea3a4ab78de744c1631", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a674d3a55bac50a36ac32a06264aafb00b67afbc8b223ea3a4ab78de744c1631", kill_on_drop: false }`
[INFO] [stdout] a674d3a55bac50a36ac32a06264aafb00b67afbc8b223ea3a4ab78de744c1631
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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=forbid" "-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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e3a295e02ce6a2264bb3a39874a8d940d436139b4528e113434a174f15d15af
[INFO] running `Command { std: "docker" "start" "-a" "6e3a295e02ce6a2264bb3a39874a8d940d436139b4528e113434a174f15d15af", kill_on_drop: false }`
[INFO] [stderr]    Compiling sorted-iter v0.1.5 (https://github.com/iljakuklic/sorted-iter?branch=multiway-union#ec69da7c)
[INFO] [stderr]    Compiling phantom_newtype v0.2.0
[INFO] [stderr]    Compiling cover v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias is never used: `RowIdx`
[INFO] [stdout]   --> src/structs/binary_matrix.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub type RowIdx = Idx<RowTag>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `ColIdx`
[INFO] [stdout]   --> src/structs/binary_matrix.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub type ColIdx = Idx<ColTag>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_empty`
[INFO] [stdout]   --> src/structs/binary_matrix.rs:40:8
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn new_empty() -> Store<J, I> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_iter`
[INFO] [stdout]   --> src/structs/binary_matrix.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn from_iter<Iter>(iter: Iter) -> Store<J, I>
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `ones_iter`
[INFO] [stdout]   --> src/structs/binary_matrix.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn ones_iter<'a>(&'a self)
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `transposed_cells_iter`
[INFO] [stdout]   --> src/structs/binary_matrix.rs:97:8
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn transposed_cells_iter<'a>(&'a self)
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `transposed`
[INFO] [stdout]    --> src/structs/binary_matrix.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 |     fn transposed(&self) -> Store<I, J> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `filtered`
[INFO] [stdout]    --> src/structs/binary_matrix.rs:142:8
[INFO] [stdout]     |
[INFO] [stdout] 142 |     fn filtered<Pred: Fn(&(Idx<J>, Idx<I>)) -> bool>(&self, p: Pred) -> Self {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_iter`
[INFO] [stdout]    --> src/structs/binary_matrix.rs:193:12
[INFO] [stdout]     |
[INFO] [stdout] 193 |     pub fn from_iter<Iter>(it: Iter) -> Self 
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_rows`
[INFO] [stdout]    --> src/structs/binary_matrix.rs:199:8
[INFO] [stdout]     |
[INFO] [stdout] 199 |     fn from_rows(by_row: Store<RowTag, ColTag>) -> Self {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `IDMap`
[INFO] [stdout]   --> src/structs/id_map.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct IDMap<ObjT, ID> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/structs/id_map.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn new() -> IDMap<ObjT, ID> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lookup`
[INFO] [stdout]   --> src/structs/id_map.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn lookup(&self, obj: &ObjT) -> Option<ID> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/structs/id_map.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn get(&mut self, obj: &ObjT) -> ID {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `back`
[INFO] [stdout]   --> src/structs/id_map.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn back(&self, id: ID) -> &ObjT {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `items`
[INFO] [stdout]   --> src/structs/id_map.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn items(&self) -> impl Iterator<Item=(ID, &ObjT)> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/structs/id_map.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `Command { std: "docker" "inspect" "6e3a295e02ce6a2264bb3a39874a8d940d436139b4528e113434a174f15d15af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e3a295e02ce6a2264bb3a39874a8d940d436139b4528e113434a174f15d15af", kill_on_drop: false }`
[INFO] [stdout] 6e3a295e02ce6a2264bb3a39874a8d940d436139b4528e113434a174f15d15af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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=forbid" "-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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d280d7f91e38188a02c13de67dc119c98322158ddee4dba19fc172fe37fe3e2
[INFO] running `Command { std: "docker" "start" "-a" "7d280d7f91e38188a02c13de67dc119c98322158ddee4dba19fc172fe37fe3e2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.109
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling ppv-lite86 v0.2.15
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling quickcheck v0.9.2
[INFO] [stderr]    Compiling quickcheck_macros v0.9.1
[INFO] [stderr]    Compiling cover v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `from_iter`
[INFO] [stdout]    --> src/structs/binary_matrix.rs:193:12
[INFO] [stdout]     |
[INFO] [stdout] 193 |     pub fn from_iter<Iter>(it: Iter) -> Self 
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `IDMap`
[INFO] [stdout]   --> src/structs/id_map.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct IDMap<ObjT, ID> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/structs/id_map.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     pub fn new() -> IDMap<ObjT, ID> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lookup`
[INFO] [stdout]   --> src/structs/id_map.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn lookup(&self, obj: &ObjT) -> Option<ID> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/structs/id_map.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn get(&mut self, obj: &ObjT) -> ID {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `back`
[INFO] [stdout]   --> src/structs/id_map.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn back(&self, id: ID) -> &ObjT {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `items`
[INFO] [stdout]   --> src/structs/id_map.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn items(&self) -> impl Iterator<Item=(ID, &ObjT)> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/structs/id_map.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 10.69s
[INFO] running `Command { std: "docker" "inspect" "7d280d7f91e38188a02c13de67dc119c98322158ddee4dba19fc172fe37fe3e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d280d7f91e38188a02c13de67dc119c98322158ddee4dba19fc172fe37fe3e2", kill_on_drop: false }`
[INFO] [stdout] 7d280d7f91e38188a02c13de67dc119c98322158ddee4dba19fc172fe37fe3e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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=forbid" "-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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 977acd26ab7f64905d9d11074716fef5ce040ebcbd36c9769cbe544e27c5a159
[INFO] running `Command { std: "docker" "start" "-a" "977acd26ab7f64905d9d11074716fef5ce040ebcbd36c9769cbe544e27c5a159", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `from_iter`
[INFO] [stderr]    --> src/structs/binary_matrix.rs:193:12
[INFO] [stderr]     |
[INFO] [stderr] 193 |     pub fn from_iter<Iter>(it: Iter) -> Self 
[INFO] [stderr]     |            ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `IDMap`
[INFO] [stderr]   --> src/structs/id_map.rs:11:8
[INFO] [stderr]    |
[INFO] [stderr] 11 | struct IDMap<ObjT, ID> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/structs/id_map.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn new() -> IDMap<ObjT, ID> {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `lookup`
[INFO] [stderr]   --> src/structs/id_map.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn lookup(&self, obj: &ObjT) -> Option<ID> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get`
[INFO] [stderr]   --> src/structs/id_map.rs:30:12
[INFO] [stderr]    |
[INFO] [stderr] 30 |     pub fn get(&mut self, obj: &ObjT) -> ID {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `back`
[INFO] [stderr]   --> src/structs/id_map.rs:41:12
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn back(&self, id: ID) -> &ObjT {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `items`
[INFO] [stderr]   --> src/structs/id_map.rs:46:12
[INFO] [stderr]    |
[INFO] [stderr] 46 |     pub fn items(&self) -> impl Iterator<Item=(ID, &ObjT)> {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `len`
[INFO] [stderr]   --> src/structs/id_map.rs:51:12
[INFO] [stderr]    |
[INFO] [stderr] 51 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `cover` (bin "cover" test) generated 8 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/cover-d939b749f18d9276)
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test structs::binary_matrix::test::unit_empty_valid ... ok
[INFO] [stdout] test structs::binary_matrix::test::unit_width0 ... ok
[INFO] [stdout] test structs::binary_matrix::test::unit_width2 ... ok
[INFO] [stdout] test structs::binary_matrix::test::unit_dump ... ok
[INFO] [stdout] test structs::binary_matrix::test::qc_filtered_trivial_false ... ok
[INFO] [stdout] test structs::binary_matrix::test::qc_arbitrary_valid ... ok
[INFO] [stdout] test structs::binary_matrix::test::qc_filtered_trivial_true ... ok
[INFO] [stdout] test structs::binary_matrix::test::qc_dump_popcount ... ok
[INFO] [stdout] test structs::binary_matrix::test::qc_filtered_valid ... ok
[INFO] [stdout] test structs::binary_matrix::test::qc_transposed_valid ... ok
[INFO] [stdout] test structs::binary_matrix::test::qc_filtered_model ... ok
[INFO] [stdout] test structs::binary_matrix::test::qc_bycol_transposed ... ok
[INFO] [stdout] test structs::binary_matrix::test::qc_transposed_model ... ok
[INFO] [stdout] test structs::binary_matrix::test::qc_transposed_twice ... ok
[INFO] [stdout] test structs::binary_matrix::test::qc_shrinked_valid ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.58s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "977acd26ab7f64905d9d11074716fef5ce040ebcbd36c9769cbe544e27c5a159", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "977acd26ab7f64905d9d11074716fef5ce040ebcbd36c9769cbe544e27c5a159", kill_on_drop: false }`
[INFO] [stdout] 977acd26ab7f64905d9d11074716fef5ce040ebcbd36c9769cbe544e27c5a159