[INFO] fetching crate amts-prelude 0.1.2...
[INFO] checking amts-prelude-0.1.2 against beta for pr-78714
[INFO] extracting crate amts-prelude 0.1.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate amts-prelude 0.1.2 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 amts-prelude 0.1.2
[INFO] finished tweaking crates.io crate amts-prelude 0.1.2
[INFO] tweaked toml for crates.io crate amts-prelude 0.1.2 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] 8eb148bdbab95876f7e0a5accd68f95906606b402a188a63021aa9b7bd312f2f
[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" "8eb148bdbab95876f7e0a5accd68f95906606b402a188a63021aa9b7bd312f2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8eb148bdbab95876f7e0a5accd68f95906606b402a188a63021aa9b7bd312f2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eb148bdbab95876f7e0a5accd68f95906606b402a188a63021aa9b7bd312f2f", kill_on_drop: false }`
[INFO] [stdout] 8eb148bdbab95876f7e0a5accd68f95906606b402a188a63021aa9b7bd312f2f
[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] e5378357b5470d007718ab56d0b8474eb665383098973ff85a58528101f46669
[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" "e5378357b5470d007718ab56d0b8474eb665383098973ff85a58528101f46669", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking futures-io v0.3.8
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking signature v1.2.2
[INFO] [stderr]     Checking subtle v2.3.0
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking vec-arena v1.0.0
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking data-encoding v2.3.1
[INFO] [stderr]     Checking json v0.12.4
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]    Compiling ring v0.16.15
[INFO] [stderr]     Checking base64-url v1.4.7
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking async-lock v2.3.0
[INFO] [stderr]     Checking ed25519 v1.0.3
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]     Checking sha2 v0.9.2
[INFO] [stderr]     Checking nuid v0.2.2
[INFO] [stderr]     Checking async-channel v1.5.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking futures-lite v1.11.2
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-io v1.2.0
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking async-net v1.5.0
[INFO] [stderr]     Checking sct v0.6.0
[INFO] [stderr]     Checking webpki v0.21.3
[INFO] [stderr]     Checking rustls v0.18.1
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking async-rustls v0.1.1
[INFO] [stderr]     Checking rustls-native-certs v0.4.0
[INFO] [stderr]    Compiling zeroize_derive v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]     Checking zeroize v1.1.1
[INFO] [stderr]     Checking curve25519-dalek v3.0.0
[INFO] [stderr]     Checking subtle-encoding v0.5.1
[INFO] [stderr]     Checking signatory v0.21.0
[INFO] [stderr]     Checking serde v1.0.117
[INFO] [stderr]     Checking ed25519-dalek v1.0.1
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking nkeys v0.0.11
[INFO] [stderr]     Checking nats v0.8.3
[INFO] [stderr]     Checking bson v1.1.0
[INFO] [stderr]     Checking amts-prelude v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.19s
[INFO] running `Command { std: "docker" "inspect" "e5378357b5470d007718ab56d0b8474eb665383098973ff85a58528101f46669", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5378357b5470d007718ab56d0b8474eb665383098973ff85a58528101f46669", kill_on_drop: false }`
[INFO] [stdout] e5378357b5470d007718ab56d0b8474eb665383098973ff85a58528101f46669