[INFO] fetching crate stacker-engine 0.2.0...
[INFO] testing stacker-engine-0.2.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate stacker-engine 0.2.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate stacker-engine 0.2.0
[INFO] finished tweaking crates.io crate stacker-engine 0.2.0
[INFO] tweaked toml for crates.io crate stacker-engine 0.2.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate stacker-engine 0.2.0 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] crate crates.io crate stacker-engine 0.2.0 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-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] 5da15dcb600d674c07393f978981e9b7900875ad62a1a2664f3cb557c77ad47f
[INFO] running `Command { std: "docker" "start" "-a" "5da15dcb600d674c07393f978981e9b7900875ad62a1a2664f3cb557c77ad47f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5da15dcb600d674c07393f978981e9b7900875ad62a1a2664f3cb557c77ad47f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5da15dcb600d674c07393f978981e9b7900875ad62a1a2664f3cb557c77ad47f", kill_on_drop: false }`
[INFO] [stdout] 5da15dcb600d674c07393f978981e9b7900875ad62a1a2664f3cb557c77ad47f
[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] fdf61ce86afc988603d23bd995321f90014b60a17f986b2bc8ac9c550382c861
[INFO] running `Command { std: "docker" "start" "-a" "fdf61ce86afc988603d23bd995321f90014b60a17f986b2bc8ac9c550382c861", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.111
[INFO] [stderr]    Compiling heapless v0.9.2
[INFO] [stderr]    Compiling thiserror v2.0.17
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling hash32 v0.3.1
[INFO] [stderr]    Compiling rand v0.10.0
[INFO] [stderr]    Compiling rand_chacha v0.10.0
[INFO] [stderr]    Compiling thiserror-impl v2.0.17
[INFO] [stderr]    Compiling stacker-engine v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.27s
[INFO] running `Command { std: "docker" "inspect" "fdf61ce86afc988603d23bd995321f90014b60a17f986b2bc8ac9c550382c861", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdf61ce86afc988603d23bd995321f90014b60a17f986b2bc8ac9c550382c861", kill_on_drop: false }`
[INFO] [stdout] fdf61ce86afc988603d23bd995321f90014b60a17f986b2bc8ac9c550382c861
[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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 63d9378b9ae23ae8eb3879a3f59d6f13680770e6465a94c462f901d9bff73cf8
[INFO] running `Command { std: "docker" "start" "-a" "63d9378b9ae23ae8eb3879a3f59d6f13680770e6465a94c462f901d9bff73cf8", kill_on_drop: false }`
[INFO] [stderr]    Compiling stacker-engine v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "63d9378b9ae23ae8eb3879a3f59d6f13680770e6465a94c462f901d9bff73cf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63d9378b9ae23ae8eb3879a3f59d6f13680770e6465a94c462f901d9bff73cf8", kill_on_drop: false }`
[INFO] [stdout] 63d9378b9ae23ae8eb3879a3f59d6f13680770e6465a94c462f901d9bff73cf8
[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" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 79a3dbefe406432e66e2a0d63459201751126c0837c1c44d32ad9d933e0ef2ec
[INFO] running `Command { std: "docker" "start" "-a" "79a3dbefe406432e66e2a0d63459201751126c0837c1c44d32ad9d933e0ef2ec", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/stacker_engine-ce04d7fbea9a4283)
[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] [stderr]    Doc-tests stacker_engine
[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" "79a3dbefe406432e66e2a0d63459201751126c0837c1c44d32ad9d933e0ef2ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79a3dbefe406432e66e2a0d63459201751126c0837c1c44d32ad9d933e0ef2ec", kill_on_drop: false }`
[INFO] [stdout] 79a3dbefe406432e66e2a0d63459201751126c0837c1c44d32ad9d933e0ef2ec
