[INFO] cloning repository https://github.com/razorbacky/return_and_scope
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/razorbacky/return_and_scope" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frazorbacky%2Freturn_and_scope", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frazorbacky%2Freturn_and_scope'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] faab58ce622cb3131e5c6aa2de540b064d9f50f4
[INFO] testing razorbacky/return_and_scope against beta-2026-01-20 for beta-1.94-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frazorbacky%2Freturn_and_scope" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/razorbacky/return_and_scope
[INFO] finished tweaking git repo https://github.com/razorbacky/return_and_scope
[INFO] tweaked toml for git repo https://github.com/razorbacky/return_and_scope written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/razorbacky/return_and_scope on toolchain beta-2026-01-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/razorbacky/return_and_scope 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-2026-01-20" "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
[ERROR] error running command: no output for 300 seconds
[INFO] testing razorbacky/return_and_scope against beta-2026-01-20 for beta-1.94-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frazorbacky%2Freturn_and_scope" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/razorbacky/return_and_scope
[INFO] finished tweaking git repo https://github.com/razorbacky/return_and_scope
[INFO] tweaked toml for git repo https://github.com/razorbacky/return_and_scope written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/razorbacky/return_and_scope on toolchain beta-2026-01-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/razorbacky/return_and_scope 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-2026-01-20" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd5d1abcff9051f0ea8a94af7d51f9a95299568460e6a4948fbc8a8a7f83455b
[INFO] running `Command { std: "docker" "start" "-a" "bd5d1abcff9051f0ea8a94af7d51f9a95299568460e6a4948fbc8a8a7f83455b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd5d1abcff9051f0ea8a94af7d51f9a95299568460e6a4948fbc8a8a7f83455b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd5d1abcff9051f0ea8a94af7d51f9a95299568460e6a4948fbc8a8a7f83455b", kill_on_drop: false }`
[INFO] [stdout] bd5d1abcff9051f0ea8a94af7d51f9a95299568460e6a4948fbc8a8a7f83455b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eb5dea9d3fed807832ee374b1450659d36e68f86a684f3b54dd8466c194d344b
[INFO] running `Command { std: "docker" "start" "-a" "eb5dea9d3fed807832ee374b1450659d36e68f86a684f3b54dd8466c194d344b", kill_on_drop: false }`
[INFO] [stderr]    Compiling return_and_scope v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]  --> src/main.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let s1 = gives_ownership(); // gives_ownership 이 자신의 반환 값을 s1 으로 이동시킨다.
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]  --> src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let s3 = takes_and_gives_back(s2); //s2는 takes_and_gives_back 으로 이동하는데, 이 함수 또한 자신의 반환 값을 s3로 이동시킨다.
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "eb5dea9d3fed807832ee374b1450659d36e68f86a684f3b54dd8466c194d344b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb5dea9d3fed807832ee374b1450659d36e68f86a684f3b54dd8466c194d344b", kill_on_drop: false }`
[INFO] [stdout] eb5dea9d3fed807832ee374b1450659d36e68f86a684f3b54dd8466c194d344b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a8173dce7cd216c7b1bf0ee9b44b8e9785e9acf6a4d1120c73d2420addf67e45
[INFO] running `Command { std: "docker" "start" "-a" "a8173dce7cd216c7b1bf0ee9b44b8e9785e9acf6a4d1120c73d2420addf67e45", kill_on_drop: false }`
[INFO] [stderr]    Compiling return_and_scope v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]  --> src/main.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let s1 = gives_ownership(); // gives_ownership 이 자신의 반환 값을 s1 으로 이동시킨다.
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s3`
[INFO] [stdout]  --> src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let s3 = takes_and_gives_back(s2); //s2는 takes_and_gives_back 으로 이동하는데, 이 함수 또한 자신의 반환 값을 s3로 이동시킨다.
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "a8173dce7cd216c7b1bf0ee9b44b8e9785e9acf6a4d1120c73d2420addf67e45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8173dce7cd216c7b1bf0ee9b44b8e9785e9acf6a4d1120c73d2420addf67e45", kill_on_drop: false }`
[INFO] [stdout] a8173dce7cd216c7b1bf0ee9b44b8e9785e9acf6a4d1120c73d2420addf67e45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 95d2ac2d8cd64bb5dcd429c553d59404ba7a968b93df9d24ee82d802810d815b
[INFO] running `Command { std: "docker" "start" "-a" "95d2ac2d8cd64bb5dcd429c553d59404ba7a968b93df9d24ee82d802810d815b", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `s1`
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let s1 = gives_ownership(); // gives_ownership 이 자신의 반환 값을 s1 으로 이동시킨다.
[INFO] [stderr]   |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s3`
[INFO] [stderr]  --> src/main.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let s3 = takes_and_gives_back(s2); //s2는 takes_and_gives_back 으로 이동하는데, 이 함수 또한 자신의 반환 값을 s3로 이동시킨다.
[INFO] [stderr]   |         ^^ help: if this is intentional, prefix it with an underscore: `_s3`
[INFO] [stderr] 
[INFO] [stderr] warning: `return_and_scope` (bin "return_and_scope" test) generated 2 warnings (run `cargo fix --bin "return_and_scope" -p return_and_scope --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/return_and_scope-09496bba8a078268)
[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" "95d2ac2d8cd64bb5dcd429c553d59404ba7a968b93df9d24ee82d802810d815b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95d2ac2d8cd64bb5dcd429c553d59404ba7a968b93df9d24ee82d802810d815b", kill_on_drop: false }`
[INFO] [stdout] 95d2ac2d8cd64bb5dcd429c553d59404ba7a968b93df9d24ee82d802810d815b
