[INFO] cloning repository https://github.com/esqu1/rusty-with-graphs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/esqu1/rusty-with-graphs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fesqu1%2Frusty-with-graphs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fesqu1%2Frusty-with-graphs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9443bba14c0e6d6a05dce3d4eab47e4021c63b47
[INFO] checking esqu1/rusty-with-graphs against try#ef5216c337126ffe24d074826f4023948c4a9b8e for pr-137033
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fesqu1%2Frusty-with-graphs" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/esqu1/rusty-with-graphs on toolchain ef5216c337126ffe24d074826f4023948c4a9b8e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ef5216c337126ffe24d074826f4023948c4a9b8e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/esqu1/rusty-with-graphs
[INFO] finished tweaking git repo https://github.com/esqu1/rusty-with-graphs
[INFO] tweaked toml for git repo https://github.com/esqu1/rusty-with-graphs written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/esqu1/rusty-with-graphs 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" "+ef5216c337126ffe24d074826f4023948c4a9b8e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded matrix v0.22.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ef5216c337126ffe24d074826f4023948c4a9b8e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b0428be1b10bfa69a43705a9825f8ec142355d7f67c22254b1fb1addde0809e4
[INFO] running `Command { std: "docker" "start" "-a" "b0428be1b10bfa69a43705a9825f8ec142355d7f67c22254b1fb1addde0809e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b0428be1b10bfa69a43705a9825f8ec142355d7f67c22254b1fb1addde0809e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0428be1b10bfa69a43705a9825f8ec142355d7f67c22254b1fb1addde0809e4", kill_on_drop: false }`
[INFO] [stdout] b0428be1b10bfa69a43705a9825f8ec142355d7f67c22254b1fb1addde0809e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "RUSTDOCFLAGS=--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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+ef5216c337126ffe24d074826f4023948c4a9b8e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5d1d9d337b59bdd4d5707d03179046cd896a8eae96b7921832f702b574c20038
[INFO] running `Command { std: "docker" "start" "-a" "5d1d9d337b59bdd4d5707d03179046cd896a8eae96b7921832f702b574c20038", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]     Checking matrix v0.22.0
[INFO] [stderr]     Checking rusty-with-graphs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/flow.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let mut residual_graph = new_graph.clone();
[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: field `weight` is never read
[INFO] [stdout]  --> src/graph.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Vertex<T: Default + Clone> {
[INFO] [stdout]   |            ------ field in this struct
[INFO] [stdout] 8 |     pub id: i32,
[INFO] [stdout] 9 |     pub weight: T, // for max flows, ignored if used for weighted graphs
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Vertex` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `degree`, `vertex_set`, `remove_edge`, and `change_edge_weight` are never used
[INFO] [stdout]   --> src/graph.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub trait Graph<U: Default + Clone, V: Default + Clone> {
[INFO] [stdout]    |           ----- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 38 |     fn degree(&self, vertex_id: &i32) -> Option<usize>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 39 |     fn get_vertices(&self) -> &HashMap<i32, Vertex<U>>;
[INFO] [stdout] 40 |     fn vertex_set(&self) -> Vec<i32>;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     fn remove_edge(&mut self, v1: &i32, v2: &i32) -> Option<V>;
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 45 |     fn change_edge_weight(&mut self, v1: &i32, v2: &i32, weight: &V);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Measure` is never used
[INFO] [stdout]  --> src/shortest_path.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub trait Measure : Ord {
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PriorityVertex` is never constructed
[INFO] [stdout]   --> src/shortest_path.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct PriorityVertex<E: Measure + Add<Output = E>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dijkstra` is never used
[INFO] [stdout]   --> src/shortest_path.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn dijkstra<V: Default + Copy, E: Default + Copy + Measure + Add<Output = E>>(
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bfs_path_exists` is never used
[INFO] [stdout]   --> src/search.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn bfs_path_exists<T: Default + Clone, V: Default + Clone, G: Graph<T, V>>(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_pred` is never used
[INFO] [stdout]   --> src/search.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn add_pred<'a, T: Default + Clone>(
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_bfs_preds` is never used
[INFO] [stdout]   --> src/search.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub fn build_bfs_preds<T: Default + Clone, V: Default + Clone, G: Graph<T, V>>(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ford_fulkerson` is never used
[INFO] [stdout]  --> src/flow.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn ford_fulkerson<
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Measure` is never used
[INFO] [stdout]  --> src/measure.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Measure : Ord {
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/flow.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let mut residual_graph = new_graph.clone();
[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: fields `id` and `weight` are never read
[INFO] [stdout]  --> src/graph.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Vertex<T: Default + Clone> {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 8 |     pub id: i32,
[INFO] [stdout]   |         ^^
[INFO] [stdout] 9 |     pub weight: T, // for max flows, ignored if used for weighted graphs
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Vertex` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `neighbors`, `degree`, `vertex_set`, `add_edge`, `remove_edge`, and `change_edge_weight` are never used
[INFO] [stdout]   --> src/graph.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub trait Graph<U: Default + Clone, V: Default + Clone> {
[INFO] [stdout]    |           ----- methods in this trait
[INFO] [stdout] 36 |     // assumes simple graph structure 
[INFO] [stdout] 37 |     fn neighbors(&self, vertex_id: &i32) -> Option<HashMap<i32, V>>;
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 38 |     fn degree(&self, vertex_id: &i32) -> Option<usize>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 39 |     fn get_vertices(&self) -> &HashMap<i32, Vertex<U>>;
[INFO] [stdout] 40 |     fn vertex_set(&self) -> Vec<i32>;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     fn add_edge(&mut self, e: Edge<V>);
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 44 |     fn remove_edge(&mut self, v1: &i32, v2: &i32) -> Option<V>;
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 45 |     fn change_edge_weight(&mut self, v1: &i32, v2: &i32, weight: &V);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Measure` is never used
[INFO] [stdout]  --> src/shortest_path.rs:9:11
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub trait Measure : Ord {
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PriorityVertex` is never constructed
[INFO] [stdout]   --> src/shortest_path.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct PriorityVertex<E: Measure + Add<Output = E>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dijkstra` is never used
[INFO] [stdout]   --> src/shortest_path.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn dijkstra<V: Default + Copy, E: Default + Copy + Measure + Add<Output = E>>(
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bfs_fold` is never used
[INFO] [stdout]  --> src/search.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn bfs_fold<T: Default + Clone, V: Default + Clone, U, G: Graph<T, V>>(
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_vertex` is never used
[INFO] [stdout]   --> src/search.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn print_vertex<T: Default + Clone>((_, vertex): (Option<i32>, &Vertex<T>), _: ()) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bfs_print` is never used
[INFO] [stdout]   --> src/search.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn bfs_print<T: Default + Clone, V: Default + Clone, G: Graph<T, V>>(
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bfs_path_exists` is never used
[INFO] [stdout]   --> src/search.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn bfs_path_exists<T: Default + Clone, V: Default + Clone, G: Graph<T, V>>(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_pred` is never used
[INFO] [stdout]   --> src/search.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn add_pred<'a, T: Default + Clone>(
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_bfs_preds` is never used
[INFO] [stdout]   --> src/search.rs:70:8
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub fn build_bfs_preds<T: Default + Clone, V: Default + Clone, G: Graph<T, V>>(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `ford_fulkerson` is never used
[INFO] [stdout]  --> src/flow.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn ford_fulkerson<
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Measure` is never used
[INFO] [stdout]  --> src/measure.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Measure : Ord {
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.88s
[INFO] running `Command { std: "docker" "inspect" "5d1d9d337b59bdd4d5707d03179046cd896a8eae96b7921832f702b574c20038", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d1d9d337b59bdd4d5707d03179046cd896a8eae96b7921832f702b574c20038", kill_on_drop: false }`
[INFO] [stdout] 5d1d9d337b59bdd4d5707d03179046cd896a8eae96b7921832f702b574c20038