[INFO] cloning repository https://github.com/isaacv-pl/rustlings-fork
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/isaacv-pl/rustlings-fork" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fisaacv-pl%2Frustlings-fork", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fisaacv-pl%2Frustlings-fork'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4800f47c95e777afd7cefff67adf6d3c0dea1584
[INFO] testing isaacv-pl/rustlings-fork 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%2Fisaacv-pl%2Frustlings-fork" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
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[INFO] started tweaking git repo https://github.com/isaacv-pl/rustlings-fork
[INFO] finished tweaking git repo https://github.com/isaacv-pl/rustlings-fork
[INFO] tweaked toml for git repo https://github.com/isaacv-pl/rustlings-fork written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/isaacv-pl/rustlings-fork 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/isaacv-pl/rustlings-fork 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-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c8984f3568301d0e8675dd51b3600e14926ebfe540aae575b54277444278217a
[INFO] running `Command { std: "docker" "start" "-a" "c8984f3568301d0e8675dd51b3600e14926ebfe540aae575b54277444278217a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8984f3568301d0e8675dd51b3600e14926ebfe540aae575b54277444278217a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8984f3568301d0e8675dd51b3600e14926ebfe540aae575b54277444278217a", kill_on_drop: false }`
[INFO] [stdout] c8984f3568301d0e8675dd51b3600e14926ebfe540aae575b54277444278217a
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4fa1a35153ac2189a081586d7c3b593c40b467ecbbbac98421157c555ada8aa7
[INFO] running `Command { std: "docker" "start" "-a" "4fa1a35153ac2189a081586d7c3b593c40b467ecbbbac98421157c555ada8aa7", kill_on_drop: false }`
[INFO] [stderr]    Compiling exercises v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected `;`, found `(`
[INFO] [stdout]  --> exercises/21_macros/macros4.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     }
[INFO] [stdout]   |      - expected `;`
[INFO] [stdout] 7 |     ($val:expr) => {
[INFO] [stdout]   |     ^ unexpected token
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercises` (bin "macros4") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> exercises/23_conversions/from_into.rs:37:25
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn from(s: &str) -> Self {}
[INFO] [stdout]    |        ----             ^^^^ expected `Person`, found `()`
[INFO] [stdout]    |        |
[INFO] [stdout]    |        implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exercises` (bin "from_into") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "4fa1a35153ac2189a081586d7c3b593c40b467ecbbbac98421157c555ada8aa7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fa1a35153ac2189a081586d7c3b593c40b467ecbbbac98421157c555ada8aa7", kill_on_drop: false }`
[INFO] [stdout] 4fa1a35153ac2189a081586d7c3b593c40b467ecbbbac98421157c555ada8aa7