[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 try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYukio0315%2FCC10-Polyglottal-Rust" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Yukio0315/CC10-Polyglottal-Rust on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", 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-8/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" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b6ac301d1c70d5306004933bc4d2ede531f50c08c2ab7a6dbf8b92e669137ecd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b6ac301d1c70d5306004933bc4d2ede531f50c08c2ab7a6dbf8b92e669137ecd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6ac301d1c70d5306004933bc4d2ede531f50c08c2ab7a6dbf8b92e669137ecd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6ac301d1c70d5306004933bc4d2ede531f50c08c2ab7a6dbf8b92e669137ecd", kill_on_drop: false }`
[INFO] [stdout] b6ac301d1c70d5306004933bc4d2ede531f50c08c2ab7a6dbf8b92e669137ecd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9c8c3aa7286406c967ad670dc6c97ceb6d69f2f67aeee0719a91fd20c7086d5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c9c8c3aa7286406c967ad670dc6c97ceb6d69f2f67aeee0719a91fd20c7086d5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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]   |                           ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[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]   |                           ^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tmp` is never read
[INFO] [stdout]  --> src/selection_sort.rs:2:9
[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: value assigned to `tmp` is never read
[INFO] [stdout]  --> src/selection_sort.rs:2:9
[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: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.10s
[INFO] running `Command { std: "docker" "inspect" "c9c8c3aa7286406c967ad670dc6c97ceb6d69f2f67aeee0719a91fd20c7086d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9c8c3aa7286406c967ad670dc6c97ceb6d69f2f67aeee0719a91fd20c7086d5", kill_on_drop: false }`
[INFO] [stdout] c9c8c3aa7286406c967ad670dc6c97ceb6d69f2f67aeee0719a91fd20c7086d5