[INFO] fetching crate hypermachines 0.1.0...
[INFO] checking hypermachines-0.1.0 against beta for pr-78714
[INFO] extracting crate hypermachines 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate hypermachines 0.1.0 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 hypermachines 0.1.0
[INFO] finished tweaking crates.io crate hypermachines 0.1.0
[INFO] tweaked toml for crates.io crate hypermachines 0.1.0 written to /workspace/builds/worker-3/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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c8c403a9e7d89baf7d69c823ab4b7f23dcda6802e40af209ac2f65310095d9f4
[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" "c8c403a9e7d89baf7d69c823ab4b7f23dcda6802e40af209ac2f65310095d9f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c8c403a9e7d89baf7d69c823ab4b7f23dcda6802e40af209ac2f65310095d9f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8c403a9e7d89baf7d69c823ab4b7f23dcda6802e40af209ac2f65310095d9f4", kill_on_drop: false }`
[INFO] [stdout] c8c403a9e7d89baf7d69c823ab4b7f23dcda6802e40af209ac2f65310095d9f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7f6cce90c00c83b2ceb08f21b1c23ca33ae9530410eaaee4273e0ea6066bb0e9
[INFO] running `Command { std: "docker" "start" "-a" "7f6cce90c00c83b2ceb08f21b1c23ca33ae9530410eaaee4273e0ea6066bb0e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking serde-json-wasm v0.2.1
[INFO] [stderr]     Checking serde_bytes v0.11.5
[INFO] [stderr]     Checking hypermachines_sys v0.1.0
[INFO] [stderr]     Checking hypermachines v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `read_arguments`, `rpc_response`
[INFO] [stdout]  --> src/lib.rs:4:39
[INFO] [stdout]   |
[INFO] [stdout] 4 | use hypermachines_sys::{host_request, read_arguments, rpc_response};
[INFO] [stdout]   |                                       ^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::de::DeserializeOwned`
[INFO] [stdout]  --> src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use serde::de::DeserializeOwned;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `read_arguments`, `rpc_response`
[INFO] [stdout]  --> src/lib.rs:4:39
[INFO] [stdout]   |
[INFO] [stdout] 4 | use hypermachines_sys::{host_request, read_arguments, rpc_response};
[INFO] [stdout]   |                                       ^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::Serialize`
[INFO] [stdout]  --> src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde::Serialize;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::de::DeserializeOwned`
[INFO] [stdout]  --> src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use serde::de::DeserializeOwned;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `serde::Serialize`
[INFO] [stdout]  --> src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde::Serialize;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.36s
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7f6cce90c00c83b2ceb08f21b1c23ca33ae9530410eaaee4273e0ea6066bb0e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f6cce90c00c83b2ceb08f21b1c23ca33ae9530410eaaee4273e0ea6066bb0e9", kill_on_drop: false }`
[INFO] [stdout] 7f6cce90c00c83b2ceb08f21b1c23ca33ae9530410eaaee4273e0ea6066bb0e9