[INFO] fetching crate multiboot2-host 0.2.1...
[INFO] checking multiboot2-host-0.2.1 against beta for pr-78714
[INFO] extracting crate multiboot2-host 0.2.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate multiboot2-host 0.2.1 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate multiboot2-host 0.2.1
[INFO] finished tweaking crates.io crate multiboot2-host 0.2.1
[INFO] tweaked toml for crates.io crate multiboot2-host 0.2.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98d1ac3028abb5ceb71d5e0e257d2b696e19596a81a8ffcd1e6a4dd33e2cb849
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "98d1ac3028abb5ceb71d5e0e257d2b696e19596a81a8ffcd1e6a4dd33e2cb849", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98d1ac3028abb5ceb71d5e0e257d2b696e19596a81a8ffcd1e6a4dd33e2cb849", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98d1ac3028abb5ceb71d5e0e257d2b696e19596a81a8ffcd1e6a4dd33e2cb849", kill_on_drop: false }`
[INFO] [stdout] 98d1ac3028abb5ceb71d5e0e257d2b696e19596a81a8ffcd1e6a4dd33e2cb849
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b766f38f7ffbddc6f6823d684dbf526c5963c5edac67873c5500986bd795c7b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6b766f38f7ffbddc6f6823d684dbf526c5963c5edac67873c5500986bd795c7b", kill_on_drop: false }`
[INFO] [stderr]     Checking thiserror v1.0.22
[INFO] [stderr]    Compiling num_enum_derive v0.5.1
[INFO] [stderr]     Checking num_enum v0.5.1
[INFO] [stderr]     Checking multiboot2-host v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.74s
[INFO] running `Command { std: "docker" "inspect" "6b766f38f7ffbddc6f6823d684dbf526c5963c5edac67873c5500986bd795c7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b766f38f7ffbddc6f6823d684dbf526c5963c5edac67873c5500986bd795c7b", kill_on_drop: false }`
[INFO] [stdout] 6b766f38f7ffbddc6f6823d684dbf526c5963c5edac67873c5500986bd795c7b