[INFO] cloning repository https://github.com/hojinahn4234/ownership_tutorial
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hojinahn4234/ownership_tutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhojinahn4234%2Fownership_tutorial", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhojinahn4234%2Fownership_tutorial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e70852ed54e331e6f95b7fc5bad1bfc393577a45
[INFO] testing hojinahn4234/ownership_tutorial against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhojinahn4234%2Fownership_tutorial" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/hojinahn4234/ownership_tutorial
[INFO] finished tweaking git repo https://github.com/hojinahn4234/ownership_tutorial
[INFO] tweaked toml for git repo https://github.com/hojinahn4234/ownership_tutorial written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/hojinahn4234/ownership_tutorial on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/hojinahn4234/ownership_tutorial 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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8caa368974eb50eea2142dd825688fabc5ff26e5982a2667c87f80e749ee3410
[INFO] running `Command { std: "docker" "start" "-a" "8caa368974eb50eea2142dd825688fabc5ff26e5982a2667c87f80e749ee3410", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8caa368974eb50eea2142dd825688fabc5ff26e5982a2667c87f80e749ee3410", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8caa368974eb50eea2142dd825688fabc5ff26e5982a2667c87f80e749ee3410", kill_on_drop: false }`
[INFO] [stdout] 8caa368974eb50eea2142dd825688fabc5ff26e5982a2667c87f80e749ee3410
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d8e15ad38f029f70be4db16e7ea532e54439da419c75d2d3bb91a8c33cb9e949
[INFO] running `Command { std: "docker" "start" "-a" "d8e15ad38f029f70be4db16e7ea532e54439da419c75d2d3bb91a8c33cb9e949", kill_on_drop: false }`
[INFO] [stderr]    Compiling ownership_tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]   --> src/main.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let slice = &s[3..len];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]   --> src/main.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let slice = &s[3..];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]   --> src/main.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn first_word(s: &String) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "d8e15ad38f029f70be4db16e7ea532e54439da419c75d2d3bb91a8c33cb9e949", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8e15ad38f029f70be4db16e7ea532e54439da419c75d2d3bb91a8c33cb9e949", kill_on_drop: false }`
[INFO] [stdout] d8e15ad38f029f70be4db16e7ea532e54439da419c75d2d3bb91a8c33cb9e949
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 502f4aa54ceca947608a7fd6ed379a60882b4f6ef19719098ef8b9507742a34a
[INFO] running `Command { std: "docker" "start" "-a" "502f4aa54ceca947608a7fd6ed379a60882b4f6ef19719098ef8b9507742a34a", kill_on_drop: false }`
[INFO] [stderr]    Compiling ownership_tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]   --> src/main.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let slice = &s[3..len];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]   --> src/main.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let slice = &s[3..];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `first_word` is never used
[INFO] [stdout]   --> src/main.rs:72:4
[INFO] [stdout]    |
[INFO] [stdout] 72 | fn first_word(s: &String) -> &str {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "502f4aa54ceca947608a7fd6ed379a60882b4f6ef19719098ef8b9507742a34a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "502f4aa54ceca947608a7fd6ed379a60882b4f6ef19719098ef8b9507742a34a", kill_on_drop: false }`
[INFO] [stdout] 502f4aa54ceca947608a7fd6ed379a60882b4f6ef19719098ef8b9507742a34a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b2cff38e200f50c6bf970925d516694c3b3a710f6952d582ce1b6050037728f6
[INFO] running `Command { std: "docker" "start" "-a" "b2cff38e200f50c6bf970925d516694c3b3a710f6952d582ce1b6050037728f6", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `slice`
[INFO] [stderr]   --> src/main.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |     let slice = &s[3..len];
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `slice`
[INFO] [stderr]   --> src/main.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |     let slice = &s[3..];
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stderr] 
[INFO] [stderr] warning: function `first_word` is never used
[INFO] [stderr]   --> src/main.rs:72:4
[INFO] [stderr]    |
[INFO] [stderr] 72 | fn first_word(s: &String) -> &str {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `ownership_tutorial` (bin "ownership_tutorial" test) generated 3 warnings (run `cargo fix --bin "ownership_tutorial" -p ownership_tutorial --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/ownership_tutorial-e580a393788c5335)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b2cff38e200f50c6bf970925d516694c3b3a710f6952d582ce1b6050037728f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2cff38e200f50c6bf970925d516694c3b3a710f6952d582ce1b6050037728f6", kill_on_drop: false }`
[INFO] [stdout] b2cff38e200f50c6bf970925d516694c3b3a710f6952d582ce1b6050037728f6
