[INFO] fetching crate graphlib 0.6.3...
[INFO] testing graphlib-0.6.3 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate graphlib 0.6.3 into /workspace/builds/worker-17/source
[INFO] validating manifest of crates.io crate graphlib 0.6.3 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate graphlib 0.6.3
[INFO] finished tweaking crates.io crate graphlib 0.6.3
[INFO] tweaked toml for crates.io crate graphlib 0.6.3 written to /workspace/builds/worker-17/source/Cargo.toml
[INFO] crate crates.io crate graphlib 0.6.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 581911e74759b957b02900af33806ba1e53121549ba3c43ba47f8bf370139e18
[INFO] running `Command { std: "docker" "start" "-a" "581911e74759b957b02900af33806ba1e53121549ba3c43ba47f8bf370139e18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "581911e74759b957b02900af33806ba1e53121549ba3c43ba47f8bf370139e18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "581911e74759b957b02900af33806ba1e53121549ba3c43ba47f8bf370139e18", kill_on_drop: false }`
[INFO] [stdout] 581911e74759b957b02900af33806ba1e53121549ba3c43ba47f8bf370139e18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3597836ff9a1fa41ac60a86cd686d8ee3e65cc31ff6e31d4d6080acd52329cc
[INFO] running `Command { std: "docker" "start" "-a" "b3597836ff9a1fa41ac60a86cd686d8ee3e65cc31ff6e31d4d6080acd52329cc", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.15
[INFO] [stderr]    Compiling ahash v0.2.19
[INFO] [stderr]    Compiling hex v0.4.3
[INFO] [stderr]    Compiling hashbrown v0.6.3
[INFO] [stderr]    Compiling rand_isaac v0.2.0
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling graphlib v0.6.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `matches`
[INFO] [stdout]   --> src/edge.rs:43:19
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub(crate) fn matches(&self, a: &VertexId, b: &VertexId) -> bool {
[INFO] [stdout]    |                   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `matches_any`
[INFO] [stdout]   --> src/edge.rs:49:19
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub(crate) fn matches_any(&self, id: &VertexId) -> bool {
[INFO] [stdout]    |                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.24s
[INFO] running `Command { std: "docker" "inspect" "b3597836ff9a1fa41ac60a86cd686d8ee3e65cc31ff6e31d4d6080acd52329cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3597836ff9a1fa41ac60a86cd686d8ee3e65cc31ff6e31d4d6080acd52329cc", kill_on_drop: false }`
[INFO] [stdout] b3597836ff9a1fa41ac60a86cd686d8ee3e65cc31ff6e31d4d6080acd52329cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b934e2701b5ad9d400d627e054841b93679f3ff931bb222e1473dce4131c7f3c
[INFO] running `Command { std: "docker" "start" "-a" "b934e2701b5ad9d400d627e054841b93679f3ff931bb222e1473dce4131c7f3c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling libc v0.2.107
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling serde_json v1.0.69
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stdout] warning: associated function is never used: `matches`
[INFO] [stdout]   --> src/edge.rs:43:19
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub(crate) fn matches(&self, a: &VertexId, b: &VertexId) -> bool {
[INFO] [stdout]    |                   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `matches_any`
[INFO] [stdout]   --> src/edge.rs:49:19
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub(crate) fn matches_any(&self, id: &VertexId) -> bool {
[INFO] [stdout]    |                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling plotters v0.3.1
[INFO] [stderr]    Compiling criterion-plot v0.4.4
[INFO] [stderr]    Compiling bstr v0.2.17
[INFO] [stderr]    Compiling serde_cbor v0.11.2
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling criterion v0.3.5
[INFO] [stderr]    Compiling graphlib v0.6.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]  --> examples/dot.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut f = File::create("example1.dot").unwrap();
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> examples/dot.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut f = File::create("example1.dot").unwrap();
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]     --> src/graph.rs:1844:13
[INFO] [stdout]      |
[INFO] [stdout] 1844 |         let id = VertexId::random();
[INFO] [stdout]      |             ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/iterators/dijkstra.rs:247:13
[INFO] [stdout]     |
[INFO] [stdout] 247 |         let mut iterator = Dijkstra::new(&graph, &v1).unwrap();
[INFO] [stdout]     |             ----^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `matches`
[INFO] [stdout]   --> src/edge.rs:43:19
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub(crate) fn matches(&self, a: &VertexId, b: &VertexId) -> bool {
[INFO] [stdout]    |                   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `matches_any`
[INFO] [stdout]   --> src/edge.rs:49:19
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub(crate) fn matches_any(&self, id: &VertexId) -> bool {
[INFO] [stdout]    |                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/iterators/dfs.rs:197:9
[INFO] [stdout]     |
[INFO] [stdout] 197 |         graph.add_edge(&v1, &v2);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/iterators/dfs.rs:198:9
[INFO] [stdout]     |
[INFO] [stdout] 198 |         graph.add_edge(&v3, &v2);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/iterators/dijkstra.rs:202:9
[INFO] [stdout]     |
[INFO] [stdout] 202 |         graph.add_edge_with_weight(&v1, &v2, 0.0);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/iterators/dijkstra.rs:215:9
[INFO] [stdout]     |
[INFO] [stdout] 215 |         graph.add_edge_with_weight(&v1, &v2, -0.1);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/iterators/dijkstra.rs:216:9
[INFO] [stdout]     |
[INFO] [stdout] 216 |         graph.add_edge_with_weight(&v2, &v1, 0.1);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/iterators/dijkstra.rs:230:9
[INFO] [stdout]     |
[INFO] [stdout] 230 |         graph.add_edge_with_weight(&v1, &v2, 0.0);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/iterators/dijkstra.rs:245:9
[INFO] [stdout]     |
[INFO] [stdout] 245 |         graph.add_edge_with_weight(&v1, &v2, 0.0);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/iterators/dijkstra.rs:260:9
[INFO] [stdout]     |
[INFO] [stdout] 260 |         graph.add_edge_with_weight(&v1, &v2, 0.0);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/iterators/dijkstra.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |         iterator.set_source(&v_c);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 15.14s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/graphlib-ca27932bf1d1498a)
[INFO] running `Command { std: "docker" "inspect" "b934e2701b5ad9d400d627e054841b93679f3ff931bb222e1473dce4131c7f3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b934e2701b5ad9d400d627e054841b93679f3ff931bb222e1473dce4131c7f3c", kill_on_drop: false }`
[INFO] [stdout] b934e2701b5ad9d400d627e054841b93679f3ff931bb222e1473dce4131c7f3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-17/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ed9732f78f526f1e3bc3ad549b30f209cd124007891a422ae6321b19c08a064f
[INFO] running `Command { std: "docker" "start" "-a" "ed9732f78f526f1e3bc3ad549b30f209cd124007891a422ae6321b19c08a064f", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `matches`
[INFO] [stderr]   --> src/edge.rs:43:19
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub(crate) fn matches(&self, a: &VertexId, b: &VertexId) -> bool {
[INFO] [stderr]    |                   ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `matches_any`
[INFO] [stderr]   --> src/edge.rs:49:19
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub(crate) fn matches_any(&self, id: &VertexId) -> bool {
[INFO] [stderr]    |                   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `graphlib` (lib) generated 2 warnings
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]  --> examples/dot.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut f = File::create("example1.dot").unwrap();
[INFO] [stderr]   |             ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> examples/dot.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut f = File::create("example1.dot").unwrap();
[INFO] [stderr]   |         ----^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `id`
[INFO] [stderr]     --> src/graph.rs:1844:13
[INFO] [stderr]      |
[INFO] [stderr] 1844 |         let id = VertexId::random();
[INFO] [stderr]      |             ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/iterators/dijkstra.rs:247:13
[INFO] [stderr]     |
[INFO] [stderr] 247 |         let mut iterator = Dijkstra::new(&graph, &v1).unwrap();
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/iterators/dfs.rs:197:9
[INFO] [stderr]     |
[INFO] [stderr] 197 |         graph.add_edge(&v1, &v2);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/iterators/dfs.rs:198:9
[INFO] [stderr]     |
[INFO] [stderr] 198 |         graph.add_edge(&v3, &v2);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/iterators/dijkstra.rs:202:9
[INFO] [stderr]     |
[INFO] [stderr] 202 |         graph.add_edge_with_weight(&v1, &v2, 0.0);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/iterators/dijkstra.rs:215:9
[INFO] [stderr]     |
[INFO] [stderr] 215 |         graph.add_edge_with_weight(&v1, &v2, -0.1);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/iterators/dijkstra.rs:216:9
[INFO] [stderr]     |
[INFO] [stderr] 216 |         graph.add_edge_with_weight(&v2, &v1, 0.1);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/iterators/dijkstra.rs:230:9
[INFO] [stderr]     |
[INFO] [stderr] 230 |         graph.add_edge_with_weight(&v1, &v2, 0.0);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/iterators/dijkstra.rs:245:9
[INFO] [stderr]     |
[INFO] [stderr] 245 |         graph.add_edge_with_weight(&v1, &v2, 0.0);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/iterators/dijkstra.rs:260:9
[INFO] [stderr]     |
[INFO] [stderr] 260 |         graph.add_edge_with_weight(&v1, &v2, 0.0);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> src/iterators/dijkstra.rs:315:9
[INFO] [stderr]     |
[INFO] [stderr] 315 |         iterator.set_source(&v_c);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `graphlib` (example "dot") generated 2 warnings
[INFO] [stderr] warning: `graphlib` (lib test) generated 13 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/graphlib-ca27932bf1d1498a)
[INFO] [stdout] 
[INFO] [stdout] running 26 tests
[INFO] [stdout] test graph::tests::is_thread_safe ... ok
[INFO] [stdout] test graph::tests::test_non_clonable_type ... ok
[INFO] [stdout] test graph::tests::test_clonable ... ok
[INFO] [stdout] test graph::tests::dfs_mul_roots ... ok
[INFO] [stdout] test graph::tests::test_add_edge_cycle_check ... ok
[INFO] [stdout] test iterators::dfs::tests::cycle_self_edge ... ok
[INFO] [stdout] test graph::tests::test_remove_edge ... ok
[INFO] [stdout] test graph::tests::dfs ... ok
[INFO] [stdout] test iterators::dfs::tests::not_cyclic ... ok
[INFO] [stdout] test iterators::dijkstra::tests::test_get_distance_with_invalid_vertex ... ok
[INFO] [stdout] test iterators::dfs::tests::not_cyclic_edge_to_successor ... ok
[INFO] [stdout] test iterators::dfs::tests::not_cyclic_edge_split_merge ... ok
[INFO] [stdout] test iterators::dijkstra::tests::test_new_with_empty_graph ... ok
[INFO] [stdout] test iterators::dijkstra::tests::test_get_path_to_with_invalid_vertex ... ok
[INFO] [stdout] test iterators::dfs::tests::not_cyclic_split_merge_continue ... ok
[INFO] [stdout] test iterators::dijkstra::tests::test_new_with_invalid_source ... ok
[INFO] [stdout] test iterators::dijkstra::tests::test_new_with_negative_weight_edge ... ok
[INFO] [stdout] test iterators::dijkstra::tests::test_set_source_with_invalid_vertex ... ok
[INFO] [stdout] test iterators::dijkstra::tests::test_on_connected_graphs ... ok
[INFO] [stdout] test iterators::dijkstra::tests::test_on_unweighted_graph ... ok
[INFO] [stdout] test iterators::owning_iterator::tests::it_yields_correct_vertex_ids ... ok
[INFO] [stdout] test iterators::topo::tests::was_cyclic ... ok
[INFO] [stdout] test iterators::topo::tests::is_cyclic ... ok
[INFO] [stdout] test iterators::topo::tests::is_not_cyclic ... ok
[INFO] [stdout] test iterators::topo::tests::is_cyclic_and_panic - should panic ... ok
[INFO] [stdout] test iterators::dfs::tests::is_cyclic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 26 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.70s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests graphlib
[INFO] [stdout] 
[INFO] [stdout] running 39 tests
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name graphlib --test /opt/rustwide/workdir/src/lib.rs -L dependency=/opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern criterion=/opt/rustwide/target/debug/deps/libcriterion-372a51284884a745.rlib --extern graphlib=/opt/rustwide/target/debug/deps/libgraphlib-12b68db8f72e5a97.rlib --extern hashbrown=/opt/rustwide/target/debug/deps/libhashbrown-2fc11a67d2f0eac6.rlib --extern hex=/opt/rustwide/target/debug/deps/libhex-d1a73dd7432b463a.rlib --extern rand=/opt/rustwide/target/debug/deps/librand-6ccdb5fb4a050461.rlib --extern rand_core=/opt/rustwide/target/debug/deps/librand_core-df8bc60668f77c1a.rlib --extern rand_isaac=/opt/rustwide/target/debug/deps/librand_isaac-9d8c20da77685fea.rlib -C embed-bitcode=no --cfg 'feature="default"' --error-format human` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "ed9732f78f526f1e3bc3ad549b30f209cd124007891a422ae6321b19c08a064f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed9732f78f526f1e3bc3ad549b30f209cd124007891a422ae6321b19c08a064f", kill_on_drop: false }`
[INFO] [stdout] ed9732f78f526f1e3bc3ad549b30f209cd124007891a422ae6321b19c08a064f