[INFO] cloning repository https://github.com/dl-watson/rust_islands
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dl-watson/rust_islands" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdl-watson%2Frust_islands", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdl-watson%2Frust_islands'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 16ae35dd92135f740bc1ee1f40378ce3d339cd87
[INFO] testing dl-watson/rust_islands against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdl-watson%2Frust_islands" "/workspace/builds/worker-23/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-23/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dl-watson/rust_islands on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dl-watson/rust_islands
[INFO] finished tweaking git repo https://github.com/dl-watson/rust_islands
[INFO] tweaked toml for git repo https://github.com/dl-watson/rust_islands written to /workspace/builds/worker-23/source/Cargo.toml
[INFO] crate git repo https://github.com/dl-watson/rust_islands already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c524cb5bd2270da0a1c2657d94873435671b12474143af187dc6460a33435e8
[INFO] running `Command { std: "docker" "start" "-a" "4c524cb5bd2270da0a1c2657d94873435671b12474143af187dc6460a33435e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c524cb5bd2270da0a1c2657d94873435671b12474143af187dc6460a33435e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c524cb5bd2270da0a1c2657d94873435671b12474143af187dc6460a33435e8", kill_on_drop: false }`
[INFO] [stdout] 4c524cb5bd2270da0a1c2657d94873435671b12474143af187dc6460a33435e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09935b41b90b179655c569de1e3eec034be938690e8673362bc9014ffc4f0c23
[INFO] running `Command { std: "docker" "start" "-a" "09935b41b90b179655c569de1e3eec034be938690e8673362bc9014ffc4f0c23", kill_on_drop: false }`
[INFO] [stderr]    Compiling islands v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `SafeDisjointSet`
[INFO] [stdout]   --> src/disjoint.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 | pub struct SafeDisjointSet(DisjointSet);
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/disjoint.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout] 100 |     pub fn new(size: usize) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find`
[INFO] [stdout]    --> src/disjoint.rs:104:12
[INFO] [stdout]     |
[INFO] [stdout] 104 |     pub fn find(&self, key: i32) -> Option<i32> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.40s
[INFO] running `Command { std: "docker" "inspect" "09935b41b90b179655c569de1e3eec034be938690e8673362bc9014ffc4f0c23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09935b41b90b179655c569de1e3eec034be938690e8673362bc9014ffc4f0c23", kill_on_drop: false }`
[INFO] [stdout] 09935b41b90b179655c569de1e3eec034be938690e8673362bc9014ffc4f0c23
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8d657f84aa51288b821ed5d1c0bff6bdd1b3bd2a5757abd50a912b00644f1040
[INFO] running `Command { std: "docker" "start" "-a" "8d657f84aa51288b821ed5d1c0bff6bdd1b3bd2a5757abd50a912b00644f1040", kill_on_drop: false }`
[INFO] [stderr]    Compiling islands v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `SafeDisjointSet`
[INFO] [stdout]   --> src/disjoint.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 | pub struct SafeDisjointSet(DisjointSet);
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/disjoint.rs:100:12
[INFO] [stdout]     |
[INFO] [stdout] 100 |     pub fn new(size: usize) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `find`
[INFO] [stdout]    --> src/disjoint.rs:104:12
[INFO] [stdout]     |
[INFO] [stdout] 104 |     pub fn find(&self, key: i32) -> Option<i32> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.33s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/islands-76b2c6f566de049b)
[INFO] running `Command { std: "docker" "inspect" "8d657f84aa51288b821ed5d1c0bff6bdd1b3bd2a5757abd50a912b00644f1040", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d657f84aa51288b821ed5d1c0bff6bdd1b3bd2a5757abd50a912b00644f1040", kill_on_drop: false }`
[INFO] [stdout] 8d657f84aa51288b821ed5d1c0bff6bdd1b3bd2a5757abd50a912b00644f1040
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 206b537b3e17b5ad2d93343fabffb41263d8e53f18315dabcc96a63880ba1801
[INFO] running `Command { std: "docker" "start" "-a" "206b537b3e17b5ad2d93343fabffb41263d8e53f18315dabcc96a63880ba1801", kill_on_drop: false }`
[INFO] [stderr] warning: struct is never constructed: `SafeDisjointSet`
[INFO] [stderr]   --> src/disjoint.rs:97:12
[INFO] [stderr]    |
[INFO] [stderr] 97 | pub struct SafeDisjointSet(DisjointSet);
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]    --> src/disjoint.rs:100:12
[INFO] [stderr]     |
[INFO] [stderr] 100 |     pub fn new(size: usize) -> Self {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `find`
[INFO] [stderr]    --> src/disjoint.rs:104:12
[INFO] [stderr]     |
[INFO] [stderr] 104 |     pub fn find(&self, key: i32) -> Option<i32> {
[INFO] [stderr]     |            ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `islands` (bin "islands" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/islands-76b2c6f566de049b)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test disjoint::tests::find ... ok
[INFO] [stdout] test disjoint::tests::num_are_own_identifier ... ok
[INFO] [stdout] test disjoint::tests::neither_are_identifier ... ok
[INFO] [stdout] test disjoint::tests::union ... ok
[INFO] [stdout] test disjoint::tests::one_isnt_an_identifier ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "206b537b3e17b5ad2d93343fabffb41263d8e53f18315dabcc96a63880ba1801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "206b537b3e17b5ad2d93343fabffb41263d8e53f18315dabcc96a63880ba1801", kill_on_drop: false }`
[INFO] [stdout] 206b537b3e17b5ad2d93343fabffb41263d8e53f18315dabcc96a63880ba1801