[INFO] cloning repository https://github.com/Yukio0315/CC10-Polyglottal-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Yukio0315/CC10-Polyglottal-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYukio0315%2FCC10-Polyglottal-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYukio0315%2FCC10-Polyglottal-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e2c0e5d1536584902ecf4c7cf90e18d324255d17
[INFO] checking Yukio0315/CC10-Polyglottal-Rust against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYukio0315%2FCC10-Polyglottal-Rust" "/workspace/builds/worker-32/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-32/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Yukio0315/CC10-Polyglottal-Rust on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Yukio0315/CC10-Polyglottal-Rust
[INFO] finished tweaking git repo https://github.com/Yukio0315/CC10-Polyglottal-Rust
[INFO] tweaked toml for git repo https://github.com/Yukio0315/CC10-Polyglottal-Rust written to /workspace/builds/worker-32/source/Cargo.toml
[INFO] crate git repo https://github.com/Yukio0315/CC10-Polyglottal-Rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 093d6ce38487a45776a701ef3c6729eb2ba1b4f8209f86a289b316195249feac
[INFO] running `Command { std: "docker" "start" "-a" "093d6ce38487a45776a701ef3c6729eb2ba1b4f8209f86a289b316195249feac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "093d6ce38487a45776a701ef3c6729eb2ba1b4f8209f86a289b316195249feac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "093d6ce38487a45776a701ef3c6729eb2ba1b4f8209f86a289b316195249feac", kill_on_drop: false }`
[INFO] [stdout] 093d6ce38487a45776a701ef3c6729eb2ba1b4f8209f86a289b316195249feac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-32/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] afd99d874e60c273e9d442229765cdccce8117c2ee1d6928fec6a7c68b19e4fd
[INFO] running `Command { std: "docker" "start" "-a" "afd99d874e60c273e9d442229765cdccce8117c2ee1d6928fec6a7c68b19e4fd", kill_on_drop: false }`
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking sort-algorithm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]  --> src/fetch_json.rs:5:27
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn create() -> Result<(Vec<i32>), Box<dyn std::error::Error>> {
[INFO] [stdout]   |                           ^        ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 5 - pub fn create() -> Result<(Vec<i32>), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 + pub fn create() -> Result<Vec<i32>, Box<dyn std::error::Error>> {
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.81s
[INFO] [stdout] warning: value assigned to `tmp` is never read
[INFO] [stdout]  --> src/selection_sort.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut tmp = (0, 0);
[INFO] [stdout]   |             ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `min_order`
[INFO] [stdout]  --> src/selection_sort.rs:8:18
[INFO] [stdout]   |
[INFO] [stdout] 8 |             let (min_order, value) = tmp;
[INFO] [stdout]   |                  ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_min_order`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/selection_sort.rs:14:25
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let (min_order, value) = tmp;
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]  --> src/fetch_json.rs:5:27
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn create() -> Result<(Vec<i32>), Box<dyn std::error::Error>> {
[INFO] [stdout]   |                           ^        ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 5 - pub fn create() -> Result<(Vec<i32>), Box<dyn std::error::Error>> {
[INFO] [stdout] 5 + pub fn create() -> Result<Vec<i32>, Box<dyn std::error::Error>> {
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tmp` is never read
[INFO] [stdout]  --> src/selection_sort.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut tmp = (0, 0);
[INFO] [stdout]   |             ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `min_order`
[INFO] [stdout]  --> src/selection_sort.rs:8:18
[INFO] [stdout]   |
[INFO] [stdout] 8 |             let (min_order, value) = tmp;
[INFO] [stdout]   |                  ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_min_order`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/selection_sort.rs:14:25
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let (min_order, value) = tmp;
[INFO] [stdout]    |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "afd99d874e60c273e9d442229765cdccce8117c2ee1d6928fec6a7c68b19e4fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afd99d874e60c273e9d442229765cdccce8117c2ee1d6928fec6a7c68b19e4fd", kill_on_drop: false }`
[INFO] [stdout] afd99d874e60c273e9d442229765cdccce8117c2ee1d6928fec6a7c68b19e4fd