[INFO] fetching crate narwhalol 0.2.3...
[INFO] checking narwhalol-0.2.3 against beta for pr-78714
[INFO] extracting crate narwhalol 0.2.3 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate narwhalol 0.2.3 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 narwhalol 0.2.3
[INFO] finished tweaking crates.io crate narwhalol 0.2.3
[INFO] tweaked toml for crates.io crate narwhalol 0.2.3 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate narwhalol 0.2.3 already has a lockfile, it will not be regenerated
[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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 2170e1217afe2245a4d544c2bab29ada77254a998c6f537c23088ba06977f538
[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" "2170e1217afe2245a4d544c2bab29ada77254a998c6f537c23088ba06977f538", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2170e1217afe2245a4d544c2bab29ada77254a998c6f537c23088ba06977f538", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2170e1217afe2245a4d544c2bab29ada77254a998c6f537c23088ba06977f538", kill_on_drop: false }`
[INFO] [stdout] 2170e1217afe2245a4d544c2bab29ada77254a998c6f537c23088ba06977f538
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 51ffab1b35aac4dde8d2682691cdfe676c964f3b5adf361231e7c917ceaf5f33
[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" "51ffab1b35aac4dde8d2682691cdfe676c964f3b5adf361231e7c917ceaf5f33", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]     Checking bytes v0.5.5
[INFO] [stderr]     Checking cache-padded v1.1.0
[INFO] [stderr]     Checking waker-fn v1.0.0
[INFO] [stderr]     Checking parking v1.0.3
[INFO] [stderr]     Checking fastrand v1.3.2
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking async-std v1.6.2
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking concurrent-queue v1.1.1
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking pretty_env_logger v0.4.0
[INFO] [stderr]     Checking tokio v0.2.21
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling snafu-derive v0.6.8
[INFO] [stderr]    Compiling async-trait v0.1.36
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking async-native-tls v0.3.3
[INFO] [stderr]     Checking pin-project v0.4.22
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking snafu v0.6.8
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking h2 v0.2.5
[INFO] [stderr]     Checking blocking v0.4.6
[INFO] [stderr]     Checking serde v1.0.114
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking smol v0.1.18
[INFO] [stderr]     Checking hyper v0.13.6
[INFO] [stderr]     Checking serde_json v1.0.56
[INFO] [stderr]     Checking narwhalol v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 14s
[INFO] running `Command { std: "docker" "inspect" "51ffab1b35aac4dde8d2682691cdfe676c964f3b5adf361231e7c917ceaf5f33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51ffab1b35aac4dde8d2682691cdfe676c964f3b5adf361231e7c917ceaf5f33", kill_on_drop: false }`
[INFO] [stdout] 51ffab1b35aac4dde8d2682691cdfe676c964f3b5adf361231e7c917ceaf5f33