[INFO] cloning repository https://github.com/ele7ija/maze
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ele7ija/maze" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fele7ija%2Fmaze", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fele7ija%2Fmaze'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d9c5d22ae8b3929db81ac1e149cdd19d973ed529
[INFO] building ele7ija/maze against master#44f415c1d617ebc7b931a243b7b321ef8a6ca47c for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fele7ija%2Fmaze" "/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/ele7ija/maze on toolchain 44f415c1d617ebc7b931a243b7b321ef8a6ca47c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ele7ija/maze
[INFO] finished tweaking git repo https://github.com/ele7ija/maze
[INFO] tweaked toml for git repo https://github.com/ele7ija/maze written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ele7ija/maze 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" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2303fd4efdaeb3fd8a220562477f6ee1b06eb78951cc0cd98b7241facdd5b3e5
[INFO] running `Command { std: "docker" "start" "-a" "2303fd4efdaeb3fd8a220562477f6ee1b06eb78951cc0cd98b7241facdd5b3e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2303fd4efdaeb3fd8a220562477f6ee1b06eb78951cc0cd98b7241facdd5b3e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2303fd4efdaeb3fd8a220562477f6ee1b06eb78951cc0cd98b7241facdd5b3e5", kill_on_drop: false }`
[INFO] [stdout] 2303fd4efdaeb3fd8a220562477f6ee1b06eb78951cc0cd98b7241facdd5b3e5
[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=warn" "-e" "RUSTDOCFLAGS=--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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c28df0e04458dd0cd5e1f92974a878ab73e72866898908e286df15db7cfa074
[INFO] running `Command { std: "docker" "start" "-a" "0c28df0e04458dd0cd5e1f92974a878ab73e72866898908e286df15db7cfa074", kill_on_drop: false }`
[INFO] [stderr]    Compiling lavirint v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `time`
[INFO] [stdout]  --> src/maze.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::{fmt, time};
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sleep`
[INFO] [stdout]  --> src/maze.rs:2:42
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{option::Option, thread::{self, sleep, JoinHandle}, sync::{Arc, Mutex}, fmt::Debug, cmp::Ordering, collections::BinaryHeap};
[INFO] [stdout]   |                                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/maze.rs:116:13
[INFO] [stdout]     |
[INFO] [stdout] 116 |         let mut f1 = field1.lock();
[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: method `get_opposite` is never used
[INFO] [stdout]   --> src/maze.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Direction {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 13 |     fn get_opposite(&self) -> Direction {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_print` is never used
[INFO] [stdout]    --> src/maze.rs:302:4
[INFO] [stdout]     |
[INFO] [stdout] 302 | fn safe_print(f: Field) -> String {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p` is never read
[INFO] [stdout]    --> src/main.rs:177:13
[INFO] [stdout]     |
[INFO] [stdout] 177 |     let mut p: Option<maze::Path> = None;
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "0c28df0e04458dd0cd5e1f92974a878ab73e72866898908e286df15db7cfa074", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c28df0e04458dd0cd5e1f92974a878ab73e72866898908e286df15db7cfa074", kill_on_drop: false }`
[INFO] [stdout] 0c28df0e04458dd0cd5e1f92974a878ab73e72866898908e286df15db7cfa074
[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=warn" "-e" "RUSTDOCFLAGS=--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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de2da91dc735ab68227ed0e56bc38f745df1f5c214bc91984040fb523d863811
[INFO] running `Command { std: "docker" "start" "-a" "de2da91dc735ab68227ed0e56bc38f745df1f5c214bc91984040fb523d863811", kill_on_drop: false }`
[INFO] [stdout] warning: unused import: `time`
[INFO] [stdout]  --> src/maze.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::{fmt, time};
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sleep`
[INFO] [stdout]  --> src/maze.rs:2:42
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{option::Option, thread::{self, sleep, JoinHandle}, sync::{Arc, Mutex}, fmt::Debug, cmp::Ordering, collections::BinaryHeap};
[INFO] [stdout]   |                                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/maze.rs:116:13
[INFO] [stdout]     |
[INFO] [stdout] 116 |         let mut f1 = field1.lock();
[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] [stderr]    Compiling lavirint v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `get_opposite` is never used
[INFO] [stdout]   --> src/maze.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Direction {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 13 |     fn get_opposite(&self) -> Direction {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_print` is never used
[INFO] [stdout]    --> src/maze.rs:302:4
[INFO] [stdout]     |
[INFO] [stdout] 302 | fn safe_print(f: Field) -> String {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `time`
[INFO] [stdout]  --> src/maze.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::{fmt, time};
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sleep`
[INFO] [stdout]  --> src/maze.rs:2:42
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{option::Option, thread::{self, sleep, JoinHandle}, sync::{Arc, Mutex}, fmt::Debug, cmp::Ordering, collections::BinaryHeap};
[INFO] [stdout]   |                                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `p` is never read
[INFO] [stdout]    --> src/main.rs:177:13
[INFO] [stdout]     |
[INFO] [stdout] 177 |     let mut p: Option<maze::Path> = None;
[INFO] [stdout]     |             ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/maze.rs:116:13
[INFO] [stdout]     |
[INFO] [stdout] 116 |         let mut f1 = field1.lock();
[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: method `get_opposite` is never used
[INFO] [stdout]   --> src/maze.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Direction {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 13 |     fn get_opposite(&self) -> Direction {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `safe_print` is never used
[INFO] [stdout]    --> src/maze.rs:302:4
[INFO] [stdout]     |
[INFO] [stdout] 302 | fn safe_print(f: Field) -> String {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "de2da91dc735ab68227ed0e56bc38f745df1f5c214bc91984040fb523d863811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de2da91dc735ab68227ed0e56bc38f745df1f5c214bc91984040fb523d863811", kill_on_drop: false }`
[INFO] [stdout] de2da91dc735ab68227ed0e56bc38f745df1f5c214bc91984040fb523d863811