[INFO] fetching crate serde_dhall 0.8.0...
[INFO] checking serde_dhall-0.8.0 against beta for pr-78714
[INFO] extracting crate serde_dhall 0.8.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate serde_dhall 0.8.0 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 serde_dhall 0.8.0
[INFO] finished tweaking crates.io crate serde_dhall 0.8.0
[INFO] tweaked toml for crates.io crate serde_dhall 0.8.0 written to /workspace/builds/worker-7/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 6c474a514941814f1efe189453e0a8b6a69ee74afbbec7455c80ae2b5ed517c0
[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" "6c474a514941814f1efe189453e0a8b6a69ee74afbbec7455c80ae2b5ed517c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6c474a514941814f1efe189453e0a8b6a69ee74afbbec7455c80ae2b5ed517c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c474a514941814f1efe189453e0a8b6a69ee74afbbec7455c80ae2b5ed517c0", kill_on_drop: false }`
[INFO] [stdout] 6c474a514941814f1efe189453e0a8b6a69ee74afbbec7455c80ae2b5ed517c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] ed2ca9a3138689ed6e1e502f885eb74ff0895a7e8c0e9b9dfe22d4945e49c1d7
[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" "ed2ca9a3138689ed6e1e502f885eb74ff0895a7e8c0e9b9dfe22d4945e49c1d7", kill_on_drop: false }`
[INFO] [stderr]     Checking annotate-snippets v0.7.0
[INFO] [stderr]    Compiling pretty v0.5.2
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]     Checking syn v1.0.48
[INFO] [stderr]     Checking pulldown-cmark v0.7.2
[INFO] [stderr]    Compiling abnf v0.6.1
[INFO] [stderr]    Compiling abnf_to_pest v0.5.0
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling pin-project-internal v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling pest_consume_macros v1.0.6
[INFO] [stderr]    Compiling dhall v0.8.0
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling dhall_proc_macros v0.5.0
[INFO] [stderr]     Checking pin-project v1.0.1
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking pest_consume v1.0.6
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]     Checking serde v1.0.117
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking serde_cbor v0.9.0
[INFO] [stderr]     Checking toml v0.5.7
[INFO] [stderr]     Checking hyper v0.13.9
[INFO] [stderr]     Checking version-sync v0.9.1
[INFO] [stderr]     Checking hyper-tls v0.4.3
[INFO] [stderr]     Checking reqwest v0.10.8
[INFO] [stderr]     Checking serde_dhall v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 03s
[INFO] running `Command { std: "docker" "inspect" "ed2ca9a3138689ed6e1e502f885eb74ff0895a7e8c0e9b9dfe22d4945e49c1d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed2ca9a3138689ed6e1e502f885eb74ff0895a7e8c0e9b9dfe22d4945e49c1d7", kill_on_drop: false }`
[INFO] [stdout] ed2ca9a3138689ed6e1e502f885eb74ff0895a7e8c0e9b9dfe22d4945e49c1d7