[INFO] cloning repository https://github.com/tmforshaw/EulerChallenges
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tmforshaw/EulerChallenges" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftmforshaw%2FEulerChallenges", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftmforshaw%2FEulerChallenges'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1acbb2c6f5931c09612ce76e78fd26f311f6474d
[INFO] testing tmforshaw/EulerChallenges 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%2Ftmforshaw%2FEulerChallenges" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tmforshaw/EulerChallenges
[INFO] finished tweaking git repo https://github.com/tmforshaw/EulerChallenges
[INFO] tweaked toml for git repo https://github.com/tmforshaw/EulerChallenges written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tmforshaw/EulerChallenges 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/tmforshaw/EulerChallenges 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 tmforshaw/EulerChallenges 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%2Ftmforshaw%2FEulerChallenges" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tmforshaw/EulerChallenges
[INFO] finished tweaking git repo https://github.com/tmforshaw/EulerChallenges
[INFO] tweaked toml for git repo https://github.com/tmforshaw/EulerChallenges written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tmforshaw/EulerChallenges 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/tmforshaw/EulerChallenges 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 173e5c32ffee6a59f56f61eda2e19614b235af7650c96d4fedc4f833f55e5a3c
[INFO] running `Command { std: "docker" "start" "-a" "173e5c32ffee6a59f56f61eda2e19614b235af7650c96d4fedc4f833f55e5a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "173e5c32ffee6a59f56f61eda2e19614b235af7650c96d4fedc4f833f55e5a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "173e5c32ffee6a59f56f61eda2e19614b235af7650c96d4fedc4f833f55e5a3c", kill_on_drop: false }`
[INFO] [stdout] 173e5c32ffee6a59f56f61eda2e19614b235af7650c96d4fedc4f833f55e5a3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] dd8d3bdd775becd4fd76093943f6be56f55cd2132e5aa6e5e8567cb3dcd6c911
[INFO] running `Command { std: "docker" "start" "-a" "dd8d3bdd775becd4fd76093943f6be56f55cd2132e5aa6e5e8567cb3dcd6c911", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling either v1.13.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling rayon v1.10.0
[INFO] [stderr]    Compiling euler_challenges v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/main.rs:678:5
[INFO] [stdout]     |
[INFO] [stdout] 669 | fn coin_sum() -> u32 {
[INFO] [stdout]     |                  --- expected `u32` because of return type
[INFO] [stdout] ...
[INFO] [stdout] 678 |     while sum < target {}
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^ expected `u32`, found `()`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `while` loops evaluate to unit type `()`
[INFO] [stdout] help: consider returning a value here
[INFO] [stdout]     |
[INFO] [stdout] 678 |     while sum < target {} /* `u32` value */
[INFO] [stdout]     |                           +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `euler_challenges` (bin "euler_challenges") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "dd8d3bdd775becd4fd76093943f6be56f55cd2132e5aa6e5e8567cb3dcd6c911", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd8d3bdd775becd4fd76093943f6be56f55cd2132e5aa6e5e8567cb3dcd6c911", kill_on_drop: false }`
[INFO] [stdout] dd8d3bdd775becd4fd76093943f6be56f55cd2132e5aa6e5e8567cb3dcd6c911
