[INFO] cloning repository https://github.com/kotabrog/n_puzzle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kotabrog/n_puzzle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotabrog%2Fn_puzzle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotabrog%2Fn_puzzle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ff2573a7e3ae5c21af85e9ef34b63be08c6a0f0c
[INFO] checking kotabrog/n_puzzle against try#e983148bd5f0f0db270bfb72149f5e892e68b67f for pr-150322
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkotabrog%2Fn_puzzle" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kotabrog/n_puzzle
[INFO] finished tweaking git repo https://github.com/kotabrog/n_puzzle
[INFO] tweaked toml for git repo https://github.com/kotabrog/n_puzzle written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kotabrog/n_puzzle on toolchain e983148bd5f0f0db270bfb72149f5e892e68b67f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kotabrog/n_puzzle 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" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9f815e177a7bab6d53b5f79b34f9d7cab47ea8e3b38c18417e1542a78a058977
[INFO] running `Command { std: "docker" "start" "-a" "9f815e177a7bab6d53b5f79b34f9d7cab47ea8e3b38c18417e1542a78a058977", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9f815e177a7bab6d53b5f79b34f9d7cab47ea8e3b38c18417e1542a78a058977", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f815e177a7bab6d53b5f79b34f9d7cab47ea8e3b38c18417e1542a78a058977", kill_on_drop: false }`
[INFO] [stdout] 9f815e177a7bab6d53b5f79b34f9d7cab47ea8e3b38c18417e1542a78a058977
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dcb33d2f7fd4f34ded8cc51a7d2e13671cd4a5bcd0fb9c4def2e94cc306af7d8
[INFO] running `Command { std: "docker" "start" "-a" "dcb33d2f7fd4f34ded8cc51a7d2e13671cd4a5bcd0fb9c4def2e94cc306af7d8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking n_puzzle v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> src/solver/sample2.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashSet;
[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 variable: `nums`
[INFO] [stdout]   --> src/solver/sample2.rs:17:15
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn solver(nums: Vec<u32>, ans: Frac) -> String {
[INFO] [stdout]    |               ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ans`
[INFO] [stdout]   --> src/solver/sample2.rs:17:31
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn solver(nums: Vec<u32>, ans: Frac) -> String {
[INFO] [stdout]    |                               ^^^ help: if this is intentional, prefix it with an underscore: `_ans`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solver` is never constructed
[INFO] [stdout]  --> src/solver/sample2.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Solver {
[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 function `new` is never used
[INFO] [stdout]  --> src/solver/sample2.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl Solver {
[INFO] [stdout]   | ----------- associated function in this implementation
[INFO] [stdout] 9 |     pub fn new(ans: Frac) -> Solver {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> src/solver/sample2.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::HashSet;
[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 variable: `nums`
[INFO] [stdout]   --> src/solver/sample2.rs:17:15
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn solver(nums: Vec<u32>, ans: Frac) -> String {
[INFO] [stdout]    |               ^^^^ help: if this is intentional, prefix it with an underscore: `_nums`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ans`
[INFO] [stdout]   --> src/solver/sample2.rs:17:31
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn solver(nums: Vec<u32>, ans: Frac) -> String {
[INFO] [stdout]    |                               ^^^ help: if this is intentional, prefix it with an underscore: `_ans`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solver` is never constructed
[INFO] [stdout]  --> src/solver/sample2.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Solver {
[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 function `new` is never used
[INFO] [stdout]  --> src/solver/sample2.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl Solver {
[INFO] [stdout]   | ----------- associated function in this implementation
[INFO] [stdout] 9 |     pub fn new(ans: Frac) -> Solver {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.27s
[INFO] running `Command { std: "docker" "inspect" "dcb33d2f7fd4f34ded8cc51a7d2e13671cd4a5bcd0fb9c4def2e94cc306af7d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcb33d2f7fd4f34ded8cc51a7d2e13671cd4a5bcd0fb9c4def2e94cc306af7d8", kill_on_drop: false }`
[INFO] [stdout] dcb33d2f7fd4f34ded8cc51a7d2e13671cd4a5bcd0fb9c4def2e94cc306af7d8
