[INFO] fetching crate cargo-lock 4.0.1...
[INFO] checking cargo-lock-4.0.1 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate cargo-lock 4.0.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate cargo-lock 4.0.1 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cargo-lock 4.0.1
[INFO] finished tweaking crates.io crate cargo-lock 4.0.1
[INFO] tweaked toml for crates.io crate cargo-lock 4.0.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate cargo-lock 4.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a75ee15718747140280f8fb1742ac892b76bc8ba19b5b4e73ac7649adaa2515f
[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" "a75ee15718747140280f8fb1742ac892b76bc8ba19b5b4e73ac7649adaa2515f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a75ee15718747140280f8fb1742ac892b76bc8ba19b5b4e73ac7649adaa2515f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a75ee15718747140280f8fb1742ac892b76bc8ba19b5b4e73ac7649adaa2515f", kill_on_drop: false }`
[INFO] [stdout] a75ee15718747140280f8fb1742ac892b76bc8ba19b5b4e73ac7649adaa2515f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 990c611ce4ebe815accc0fb6b3df4ca4a971f85a18c5f29b8a2129772d50bd5f
[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" "990c611ce4ebe815accc0fb6b3df4ca4a971f85a18c5f29b8a2129772d50bd5f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling indexmap v1.3.1
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]     Checking petgraph v0.5.0
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling gumdrop_derive v0.7.0
[INFO] [stderr]     Checking gumdrop v0.7.0
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking cargo-lock v4.0.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 39.13s
[INFO] running `Command { std: "docker" "inspect" "990c611ce4ebe815accc0fb6b3df4ca4a971f85a18c5f29b8a2129772d50bd5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "990c611ce4ebe815accc0fb6b3df4ca4a971f85a18c5f29b8a2129772d50bd5f", kill_on_drop: false }`
[INFO] [stdout] 990c611ce4ebe815accc0fb6b3df4ca4a971f85a18c5f29b8a2129772d50bd5f