[INFO] cloning repository https://github.com/Logarithmus/min-spanning-tree-and-shortest-path
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Logarithmus/min-spanning-tree-and-shortest-path" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLogarithmus%2Fmin-spanning-tree-and-shortest-path", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLogarithmus%2Fmin-spanning-tree-and-shortest-path'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7321917e4ec6971273949263dc745cd6645fc58c
[INFO] checking Logarithmus/min-spanning-tree-and-shortest-path against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLogarithmus%2Fmin-spanning-tree-and-shortest-path" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Logarithmus/min-spanning-tree-and-shortest-path on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Logarithmus/min-spanning-tree-and-shortest-path
[INFO] finished tweaking git repo https://github.com/Logarithmus/min-spanning-tree-and-shortest-path
[INFO] tweaked toml for git repo https://github.com/Logarithmus/min-spanning-tree-and-shortest-path written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Logarithmus/min-spanning-tree-and-shortest-path already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4420b89bab69bb73daf3452048535f4c7ae947509662ee8ba8448ff29307d576
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4420b89bab69bb73daf3452048535f4c7ae947509662ee8ba8448ff29307d576", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4420b89bab69bb73daf3452048535f4c7ae947509662ee8ba8448ff29307d576", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4420b89bab69bb73daf3452048535f4c7ae947509662ee8ba8448ff29307d576", kill_on_drop: false }`
[INFO] [stdout] 4420b89bab69bb73daf3452048535f4c7ae947509662ee8ba8448ff29307d576
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8771f7379c2ac413b3873a5d05833a412df0463b382315f85238a6ff747f768
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b8771f7379c2ac413b3873a5d05833a412df0463b382315f85238a6ff747f768", kill_on_drop: false }`
[INFO] [stderr]     Checking spanning_tree_and_shortest_path v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/graph.rs:147:28
[INFO] [stdout]     |
[INFO] [stdout] 147 |     pub fn dijkstra(&self, start: usize) -> Vec<Vec<HalfEdge>> {
[INFO] [stdout]     |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `DisjointSubsets`
[INFO] [stdout]  --> src/disjoint_subsets.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct DisjointSubsets {
[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: `new`
[INFO] [stdout]  --> src/disjoint_subsets.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn new(size: usize) -> Self {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find_set`
[INFO] [stdout]   --> src/disjoint_subsets.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub fn find_set(&mut self, elem: usize) -> usize {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `union_sets`
[INFO] [stdout]   --> src/disjoint_subsets.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn union_sets(&mut self, elem1: usize, elem2: usize) {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `total_weight`
[INFO] [stdout]   --> src/graph.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn total_weight(&self) -> usize {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `min_span_tree_kruskal`
[INFO] [stdout]    --> src/graph.rs:130:12
[INFO] [stdout]     |
[INFO] [stdout] 130 |     pub fn min_span_tree_kruskal(&self) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dijkstra`
[INFO] [stdout]    --> src/graph.rs:147:12
[INFO] [stdout]     |
[INFO] [stdout] 147 |     pub fn dijkstra(&self, start: usize) -> Vec<Vec<HalfEdge>> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/heap.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(cmp: F) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_empty`
[INFO] [stdout]   --> src/heap.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `graph1`
[INFO] [stdout]  --> src/test.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn graph1() -> Graph {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `graph1_mst`
[INFO] [stdout]   --> src/test.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn graph1_mst() -> Graph {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `graph_a`
[INFO] [stdout]   --> src/test.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn graph_a() -> Graph {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `graph_b`
[INFO] [stdout]   --> src/test.rs:76:8
[INFO] [stdout]    |
[INFO] [stdout] 76 | pub fn graph_b() -> Graph {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `graph_c`
[INFO] [stdout]   --> src/test.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | pub fn graph_c() -> Graph {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `graph_d`
[INFO] [stdout]    --> src/test.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 107 | pub fn graph_d() -> Graph {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]    --> src/graph.rs:147:28
[INFO] [stdout]     |
[INFO] [stdout] 147 |     pub fn dijkstra(&self, start: usize) -> Vec<Vec<HalfEdge>> {
[INFO] [stdout]     |                            ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dijkstra`
[INFO] [stdout]    --> src/graph.rs:147:12
[INFO] [stdout]     |
[INFO] [stdout] 147 |     pub fn dijkstra(&self, start: usize) -> Vec<Vec<HalfEdge>> {
[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: `new`
[INFO] [stdout]   --> src/heap.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(cmp: F) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_empty`
[INFO] [stdout]   --> src/heap.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn is_empty(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `graph1_mst`
[INFO] [stdout]   --> src/test.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn graph1_mst() -> Graph {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `graph_a`
[INFO] [stdout]   --> src/test.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub fn graph_a() -> Graph {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `graph_b`
[INFO] [stdout]   --> src/test.rs:76:8
[INFO] [stdout]    |
[INFO] [stdout] 76 | pub fn graph_b() -> Graph {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `graph_c`
[INFO] [stdout]   --> src/test.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | pub fn graph_c() -> Graph {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `graph_d`
[INFO] [stdout]    --> src/test.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 107 | pub fn graph_d() -> Graph {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "b8771f7379c2ac413b3873a5d05833a412df0463b382315f85238a6ff747f768", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8771f7379c2ac413b3873a5d05833a412df0463b382315f85238a6ff747f768", kill_on_drop: false }`
[INFO] [stdout] b8771f7379c2ac413b3873a5d05833a412df0463b382315f85238a6ff747f768