[INFO] fetching crate threadlanes 0.1.0...
[INFO] testing threadlanes-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate threadlanes 0.1.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate threadlanes 0.1.0
[INFO] finished tweaking crates.io crate threadlanes 0.1.0
[INFO] tweaked toml for crates.io crate threadlanes 0.1.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate threadlanes 0.1.0 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[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] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[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] ea971cd1c6357d2968aa89221398a6a643ae482292a7669800445e8432cdd9e9
[INFO] running `Command { std: "docker" "start" "-a" "ea971cd1c6357d2968aa89221398a6a643ae482292a7669800445e8432cdd9e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea971cd1c6357d2968aa89221398a6a643ae482292a7669800445e8432cdd9e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea971cd1c6357d2968aa89221398a6a643ae482292a7669800445e8432cdd9e9", kill_on_drop: false }`
[INFO] [stdout] ea971cd1c6357d2968aa89221398a6a643ae482292a7669800445e8432cdd9e9
[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] c33ce1e800f2518118b100b933e730020272d3a78b410dbef7a7dde514d428e5
[INFO] running `Command { std: "docker" "start" "-a" "c33ce1e800f2518118b100b933e730020272d3a78b410dbef7a7dde514d428e5", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling countdown_latch v0.1.1
[INFO] [stderr]    Compiling threadlanes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "c33ce1e800f2518118b100b933e730020272d3a78b410dbef7a7dde514d428e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c33ce1e800f2518118b100b933e730020272d3a78b410dbef7a7dde514d428e5", kill_on_drop: false }`
[INFO] [stdout] c33ce1e800f2518118b100b933e730020272d3a78b410dbef7a7dde514d428e5
[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] e44f36b27d941daca8549daf3174dc3de470e15740134429dde59a81441efc2a
[INFO] running `Command { std: "docker" "start" "-a" "e44f36b27d941daca8549daf3174dc3de470e15740134429dde59a81441efc2a", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling threadlanes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0061]: this function takes 2 arguments but 1 argument was supplied
[INFO] [stdout]   --> src/tests.rs:37:21
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let lanes = ThreadLanes::new(executors);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^----------- argument #2 of type `Option<usize>` is missing
[INFO] [stdout]    |
[INFO] [stdout] note: associated function defined here
[INFO] [stdout]   --> src/lib.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn new<E: LaneExecutor<T> + Send + 'static>(executors: Vec<E>, lane_capacity: Option<usize>) -> Self {
[INFO] [stdout]    |            ^^^                                                         ----------------------------
[INFO] [stdout] help: provide the argument
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let lanes = ThreadLanes::new(executors, /* Option<usize> */);
[INFO] [stdout]    |                                               +++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0061`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `threadlanes` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "e44f36b27d941daca8549daf3174dc3de470e15740134429dde59a81441efc2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e44f36b27d941daca8549daf3174dc3de470e15740134429dde59a81441efc2a", kill_on_drop: false }`
[INFO] [stdout] e44f36b27d941daca8549daf3174dc3de470e15740134429dde59a81441efc2a
