[INFO] cloning repository https://github.com/jamesMFelder/rust2048
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jamesMFelder/rust2048" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FjamesMFelder%2Frust2048", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FjamesMFelder%2Frust2048'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 085dcc32f7af5805d9a1553f2931d55fac1a4e60
[INFO] testing jamesMFelder/rust2048 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%2FjamesMFelder%2Frust2048" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jamesMFelder/rust2048
[INFO] finished tweaking git repo https://github.com/jamesMFelder/rust2048
[INFO] tweaked toml for git repo https://github.com/jamesMFelder/rust2048 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jamesMFelder/rust2048 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/jamesMFelder/rust2048 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 6de924d4a4ac9128aace59995fc792923b1fc0714578c3faa5f4438f60fbf463
[INFO] running `Command { std: "docker" "start" "-a" "6de924d4a4ac9128aace59995fc792923b1fc0714578c3faa5f4438f60fbf463", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6de924d4a4ac9128aace59995fc792923b1fc0714578c3faa5f4438f60fbf463", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6de924d4a4ac9128aace59995fc792923b1fc0714578c3faa5f4438f60fbf463", kill_on_drop: false }`
[INFO] [stdout] 6de924d4a4ac9128aace59995fc792923b1fc0714578c3faa5f4438f60fbf463
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 80a7149da24321b47a6f9795175c6bb3c8d240a6f6e9d77e4ded84cfb6ce7bdb
[INFO] running `Command { std: "docker" "start" "-a" "80a7149da24321b47a6f9795175c6bb3c8d240a6f6e9d77e4ded84cfb6ce7bdb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling signal-hook v0.3.17
[INFO] [stderr]    Compiling smallvec v1.11.2
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling bitflags v2.4.1
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling mio v0.8.9
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling signal-hook-mio v0.2.3
[INFO] [stderr]    Compiling crossterm v0.27.0
[INFO] [stderr]    Compiling rust2048 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 |     IO(io::Error),
[INFO] [stdout]    |     -- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `InputErrors` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 36 -     IO(io::Error),
[INFO] [stdout] 36 +     IO(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.41s
[INFO] running `Command { std: "docker" "inspect" "80a7149da24321b47a6f9795175c6bb3c8d240a6f6e9d77e4ded84cfb6ce7bdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80a7149da24321b47a6f9795175c6bb3c8d240a6f6e9d77e4ded84cfb6ce7bdb", kill_on_drop: false }`
[INFO] [stdout] 80a7149da24321b47a6f9795175c6bb3c8d240a6f6e9d77e4ded84cfb6ce7bdb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e4e3f1f3c2c300500ba726b287469be369f54a23272b213763ed4f51b8ff25d2
[INFO] running `Command { std: "docker" "start" "-a" "e4e3f1f3c2c300500ba726b287469be369f54a23272b213763ed4f51b8ff25d2", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust2048 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:36:8
[INFO] [stdout]    |
[INFO] [stdout] 36 |     IO(io::Error),
[INFO] [stdout]    |     -- ^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `InputErrors` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 36 -     IO(io::Error),
[INFO] [stdout] 36 +     IO(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "e4e3f1f3c2c300500ba726b287469be369f54a23272b213763ed4f51b8ff25d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4e3f1f3c2c300500ba726b287469be369f54a23272b213763ed4f51b8ff25d2", kill_on_drop: false }`
[INFO] [stdout] e4e3f1f3c2c300500ba726b287469be369f54a23272b213763ed4f51b8ff25d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 6b3716fec5dfd0f4172086791fe7933ad6a3aabc511796e8ab3d65d239d6f167
[INFO] running `Command { std: "docker" "start" "-a" "6b3716fec5dfd0f4172086791fe7933ad6a3aabc511796e8ab3d65d239d6f167", kill_on_drop: false }`
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/main.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 |     IO(io::Error),
[INFO] [stderr]    |     -- ^^^^^^^^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `InputErrors` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 36 -     IO(io::Error),
[INFO] [stderr] 36 +     IO(()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `rust2048` (bin "rust2048" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust2048-d81d55999cbba591)
[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" "6b3716fec5dfd0f4172086791fe7933ad6a3aabc511796e8ab3d65d239d6f167", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b3716fec5dfd0f4172086791fe7933ad6a3aabc511796e8ab3d65d239d6f167", kill_on_drop: false }`
[INFO] [stdout] 6b3716fec5dfd0f4172086791fe7933ad6a3aabc511796e8ab3d65d239d6f167
