[INFO] cloning repository https://github.com/const-z/puzzle_15
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/const-z/puzzle_15" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconst-z%2Fpuzzle_15", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconst-z%2Fpuzzle_15'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7e4d289bbbbdf4ceb657e9133f21fd5cdeddc2b7
[INFO] checking const-z/puzzle_15 against try#2c4e58eac5a232e49065e517c1cf50b2715ccf85 for pr-140283
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fconst-z%2Fpuzzle_15" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/const-z/puzzle_15
[INFO] finished tweaking git repo https://github.com/const-z/puzzle_15
[INFO] tweaked toml for git repo https://github.com/const-z/puzzle_15 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/const-z/puzzle_15 on toolchain 2c4e58eac5a232e49065e517c1cf50b2715ccf85
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/const-z/puzzle_15 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" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 58b379740d02f6ec848d1c938041cc4588247eeb0e1281334f5babcd6a092d95
[INFO] running `Command { std: "docker" "start" "-a" "58b379740d02f6ec848d1c938041cc4588247eeb0e1281334f5babcd6a092d95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58b379740d02f6ec848d1c938041cc4588247eeb0e1281334f5babcd6a092d95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58b379740d02f6ec848d1c938041cc4588247eeb0e1281334f5babcd6a092d95", kill_on_drop: false }`
[INFO] [stdout] 58b379740d02f6ec848d1c938041cc4588247eeb0e1281334f5babcd6a092d95
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef0691926cf0868538c7f963c4651e82b6411537105ba132a277ae0f9d5c3ccf
[INFO] running `Command { std: "docker" "start" "-a" "ef0691926cf0868538c7f963c4651e82b6411537105ba132a277ae0f9d5c3ccf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]    Compiling syn v2.0.77
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking puzzle v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Fill`
[INFO] [stdout]  --> src/puzzle/mod.rs:1:36
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::{self, seq::SliceRandom, Fill};
[INFO] [stdout]   |                                    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Add` and `Neg`
[INFO] [stdout]   --> src/puzzle/mod.rs:56:20
[INFO] [stdout]    |
[INFO] [stdout] 56 |     use std::ops::{Add, Neg};
[INFO] [stdout]    |                    ^^^  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Fill`
[INFO] [stdout]  --> src/puzzle/mod.rs:1:36
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::{self, seq::SliceRandom, Fill};
[INFO] [stdout]   |                                    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_board` is never used
[INFO] [stdout]   --> src/puzzle/mod.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Puzzle {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub fn get_board(&self) -> &Vec<Vec<i16>> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Puzzle` is never constructed
[INFO] [stdout]  --> src/puzzle/mod.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Puzzle {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_board`, and `do_move` are never used
[INFO] [stdout]   --> src/puzzle/mod.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Puzzle {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] 10 |     pub fn new(n: i16) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub fn get_board(&self) -> &Vec<Vec<i16>> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |     pub fn do_move(&mut self, from: (usize, usize)) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.29s
[INFO] running `Command { std: "docker" "inspect" "ef0691926cf0868538c7f963c4651e82b6411537105ba132a277ae0f9d5c3ccf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef0691926cf0868538c7f963c4651e82b6411537105ba132a277ae0f9d5c3ccf", kill_on_drop: false }`
[INFO] [stdout] ef0691926cf0868538c7f963c4651e82b6411537105ba132a277ae0f9d5c3ccf