[INFO] cloning repository https://github.com/kharenzze/walker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kharenzze/walker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkharenzze%2Fwalker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkharenzze%2Fwalker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b653d2f89b5aafe90e4d751c0ee9e8288e0a2c3d
[INFO] checking kharenzze/walker against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkharenzze%2Fwalker" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kharenzze/walker on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kharenzze/walker
[INFO] finished tweaking git repo https://github.com/kharenzze/walker
[INFO] tweaked toml for git repo https://github.com/kharenzze/walker written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kharenzze/walker 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded indoc v1.0.4
[INFO] [stderr]   Downloaded unindent v0.1.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c2a76135483cc3ecf91ac841f88498ce81004515f2df08546ec793d1709df4d
[INFO] running `Command { std: "docker" "start" "-a" "3c2a76135483cc3ecf91ac841f88498ce81004515f2df08546ec793d1709df4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c2a76135483cc3ecf91ac841f88498ce81004515f2df08546ec793d1709df4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c2a76135483cc3ecf91ac841f88498ce81004515f2df08546ec793d1709df4d", kill_on_drop: false }`
[INFO] [stdout] 3c2a76135483cc3ecf91ac841f88498ce81004515f2df08546ec793d1709df4d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1a74530b41cfbc8140902ba217c3bdb1d0577370c5ad0a7e1390b30ed0dfbe62
[INFO] running `Command { std: "docker" "start" "-a" "1a74530b41cfbc8140902ba217c3bdb1d0577370c5ad0a7e1390b30ed0dfbe62", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling unindent v0.1.8
[INFO] [stderr]    Compiling indoc v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking walker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `BinaryHeap`
[INFO] [stdout]  --> src/lib.rs:5:24
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::{BinaryHeap, HashMap, HashSet};
[INFO] [stdout]   |                        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BinaryHeap`
[INFO] [stdout]  --> src/lib.rs:5:24
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::{BinaryHeap, HashMap, HashSet};
[INFO] [stdout]   |                        ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `point` and `heuristic` are never read
[INFO] [stdout]    --> src/lib.rs:339:3
[INFO] [stdout]     |
[INFO] [stdout] 338 | struct CostMetric {
[INFO] [stdout]     |        ---------- fields in this struct
[INFO] [stdout] 339 |   point: Point,
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 342 |   heuristic: usize,
[INFO] [stdout]     |   ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CostMetric` has derived impls for the traits `Clone` and `Debug`, 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: method `cost` is never used
[INFO] [stdout]    --> src/lib.rs:348:6
[INFO] [stdout]     |
[INFO] [stdout] 346 | impl CostMetric {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] 347 |   #[inline]
[INFO] [stdout] 348 |   fn cost(&self) -> usize {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `ZERO` is never used
[INFO] [stdout]   --> src/point.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 | const ZERO: Point = Point::new(0, 0);
[INFO] [stdout]    |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_contained_in` is never used
[INFO] [stdout]   --> src/point.rs:42:10
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl Point {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 42 |   pub fn is_contained_in(&self, reference: &Self) -> bool {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     gm.solve();
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let _ = gm.solve();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `point` and `heuristic` are never read
[INFO] [stdout]    --> src/lib.rs:339:3
[INFO] [stdout]     |
[INFO] [stdout] 338 | struct CostMetric {
[INFO] [stdout]     |        ---------- fields in this struct
[INFO] [stdout] 339 |   point: Point,
[INFO] [stdout]     |   ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 342 |   heuristic: usize,
[INFO] [stdout]     |   ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `CostMetric` has derived impls for the traits `Clone` and `Debug`, 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: method `cost` is never used
[INFO] [stdout]    --> src/lib.rs:348:6
[INFO] [stdout]     |
[INFO] [stdout] 346 | impl CostMetric {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] 347 |   #[inline]
[INFO] [stdout] 348 |   fn cost(&self) -> usize {
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     gm.solve();
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let _ = gm.solve();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:460:5
[INFO] [stdout]     |
[INFO] [stdout] 460 |     gm.solve();
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 460 |     let _ = gm.solve();
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:464:5
[INFO] [stdout]     |
[INFO] [stdout] 464 |     gm.solve();
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 464 |     let _ = gm.solve();
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.22s
[INFO] running `Command { std: "docker" "inspect" "1a74530b41cfbc8140902ba217c3bdb1d0577370c5ad0a7e1390b30ed0dfbe62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a74530b41cfbc8140902ba217c3bdb1d0577370c5ad0a7e1390b30ed0dfbe62", kill_on_drop: false }`
[INFO] [stdout] 1a74530b41cfbc8140902ba217c3bdb1d0577370c5ad0a7e1390b30ed0dfbe62