[INFO] fetching crate mlearning-studio 0.1.0...
[INFO] testing mlearning-studio-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate mlearning-studio 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate mlearning-studio 0.1.0
[INFO] finished tweaking crates.io crate mlearning-studio 0.1.0
[INFO] tweaked toml for crates.io crate mlearning-studio 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mlearning-studio 0.1.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mlearning-studio 0.1.0 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-2025-09-21" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 54be6545167935d27f917865cf8bc1f3cc3d2689270c9c1c05d6ac320cb471e1
[INFO] running `Command { std: "docker" "start" "-a" "54be6545167935d27f917865cf8bc1f3cc3d2689270c9c1c05d6ac320cb471e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54be6545167935d27f917865cf8bc1f3cc3d2689270c9c1c05d6ac320cb471e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54be6545167935d27f917865cf8bc1f3cc3d2689270c9c1c05d6ac320cb471e1", kill_on_drop: false }`
[INFO] [stdout] 54be6545167935d27f917865cf8bc1f3cc3d2689270c9c1c05d6ac320cb471e1
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eee1ee93a7843dbfd45a0761b35202db458f4c296f0ec23f4a5e17171f882e6e
[INFO] running `Command { std: "docker" "start" "-a" "eee1ee93a7843dbfd45a0761b35202db458f4c296f0ec23f4a5e17171f882e6e", kill_on_drop: false }`
[INFO] [stderr]    Compiling mlearning-studio v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "eee1ee93a7843dbfd45a0761b35202db458f4c296f0ec23f4a5e17171f882e6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eee1ee93a7843dbfd45a0761b35202db458f4c296f0ec23f4a5e17171f882e6e", kill_on_drop: false }`
[INFO] [stdout] eee1ee93a7843dbfd45a0761b35202db458f4c296f0ec23f4a5e17171f882e6e
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4ee2c19f4774059a49b48b970f8a3c44e221adfed08ce5acc90e4e89d0b4563
[INFO] running `Command { std: "docker" "start" "-a" "a4ee2c19f4774059a49b48b970f8a3c44e221adfed08ce5acc90e4e89d0b4563", kill_on_drop: false }`
[INFO] [stderr]    Compiling mlearning-studio v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "a4ee2c19f4774059a49b48b970f8a3c44e221adfed08ce5acc90e4e89d0b4563", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4ee2c19f4774059a49b48b970f8a3c44e221adfed08ce5acc90e4e89d0b4563", kill_on_drop: false }`
[INFO] [stdout] a4ee2c19f4774059a49b48b970f8a3c44e221adfed08ce5acc90e4e89d0b4563
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] faf9724d898bf3837fa898cb91c3198e2ba42e83d3e8a6f618b1ef3a2b4516ad
[INFO] running `Command { std: "docker" "start" "-a" "faf9724d898bf3837fa898cb91c3198e2ba42e83d3e8a6f618b1ef3a2b4516ad", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mlearning_studio-5a5ecd45e0e97993)
[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] [stderr]    Doc-tests mlearning_studio
[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" "faf9724d898bf3837fa898cb91c3198e2ba42e83d3e8a6f618b1ef3a2b4516ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "faf9724d898bf3837fa898cb91c3198e2ba42e83d3e8a6f618b1ef3a2b4516ad", kill_on_drop: false }`
[INFO] [stdout] faf9724d898bf3837fa898cb91c3198e2ba42e83d3e8a6f618b1ef3a2b4516ad