[INFO] fetching crate euka 0.0.1...
[INFO] checking euka-0.0.1 against beta for pr-78714
[INFO] extracting crate euka 0.0.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate euka 0.0.1 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 euka 0.0.1
[INFO] finished tweaking crates.io crate euka 0.0.1
[INFO] tweaked toml for crates.io crate euka 0.0.1 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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 18568529d2bd300ef212381fca6bd9abac8a608cfdf11519ed033231c0622eef
[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" "18568529d2bd300ef212381fca6bd9abac8a608cfdf11519ed033231c0622eef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "18568529d2bd300ef212381fca6bd9abac8a608cfdf11519ed033231c0622eef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18568529d2bd300ef212381fca6bd9abac8a608cfdf11519ed033231c0622eef", kill_on_drop: false }`
[INFO] [stdout] 18568529d2bd300ef212381fca6bd9abac8a608cfdf11519ed033231c0622eef
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2795e36b725776babb28c2af1814337817430d0b29bb889d55f059caf6efc148
[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" "2795e36b725776babb28c2af1814337817430d0b29bb889d55f059caf6efc148", kill_on_drop: false }`
[INFO] [stderr]    Compiling subtle v2.3.0
[INFO] [stderr]     Checking ordermap v0.3.5
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]    Compiling clear_on_drop v0.2.4
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling zeroize_derive v0.10.0
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking blake2b_simd v0.5.11
[INFO] [stderr]     Checking petgraph v0.4.13
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking zeroize v0.10.1
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling curve25519-dalek v1.2.4
[INFO] [stderr]     Checking mohan v0.0.24
[INFO] [stderr]     Checking euka v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Hashable`
[INFO] [stdout]  --> src/euka_tree.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |         Hashable
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Hashable`
[INFO] [stdout]  --> src/euka_tree.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |         Hashable
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.40s
[INFO] running `Command { std: "docker" "inspect" "2795e36b725776babb28c2af1814337817430d0b29bb889d55f059caf6efc148", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2795e36b725776babb28c2af1814337817430d0b29bb889d55f059caf6efc148", kill_on_drop: false }`
[INFO] [stdout] 2795e36b725776babb28c2af1814337817430d0b29bb889d55f059caf6efc148