[INFO] fetching crate cardpack 0.3.8...
[INFO] checking cardpack-0.3.8 against beta for pr-78714
[INFO] extracting crate cardpack 0.3.8 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate cardpack 0.3.8 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 cardpack 0.3.8
[INFO] finished tweaking crates.io crate cardpack 0.3.8
[INFO] tweaked toml for crates.io crate cardpack 0.3.8 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate cardpack 0.3.8 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-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae5915e86ef13202ffb68474cef737eb0c25982b4f4decea98f75de423503ad4
[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" "ae5915e86ef13202ffb68474cef737eb0c25982b4f4decea98f75de423503ad4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae5915e86ef13202ffb68474cef737eb0c25982b4f4decea98f75de423503ad4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae5915e86ef13202ffb68474cef737eb0c25982b4f4decea98f75de423503ad4", kill_on_drop: false }`
[INFO] [stdout] ae5915e86ef13202ffb68474cef737eb0c25982b4f4decea98f75de423503ad4
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bcf97ad86028108e0fd228fe3a289defbaa1a7249618f73a0ee4cf2f541ff9d4
[INFO] running `Command { std: "docker" "start" "-a" "bcf97ad86028108e0fd228fe3a289defbaa1a7249618f73a0ee4cf2f541ff9d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling tinystr v0.3.4
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling futures-sink v0.3.5
[INFO] [stderr]    Compiling futures-core v0.3.5
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling futures-task v0.3.5
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling futures-io v0.3.5
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]     Checking fluent-syntax v0.9.3
[INFO] [stderr]    Compiling once_cell v1.4.1
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling futures-channel v0.3.5
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling aho-corasick v0.7.13
[INFO] [stderr]    Compiling bstr v0.2.13
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking type-map v0.3.0
[INFO] [stderr]     Checking unic-langid-impl v0.9.0
[INFO] [stderr]     Checking globset v0.4.5
[INFO] [stderr]     Checking ignore v0.4.16
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]    Compiling unic-langid-macros-impl v0.9.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling rental-impl v0.5.5
[INFO] [stderr]    Compiling snafu-derive v0.6.8
[INFO] [stderr]     Checking unic-langid-macros v0.9.0
[INFO] [stderr]    Compiling unic-langid v0.9.0
[INFO] [stderr]     Checking fluent-langneg v0.13.0
[INFO] [stderr]     Checking intl_pluralrules v7.0.0
[INFO] [stderr]     Checking intl-memoizer v0.5.0
[INFO] [stderr]     Checking snafu v0.6.8
[INFO] [stderr]    Compiling pin-project v0.4.23
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling futures v0.3.5
[INFO] [stderr]    Compiling flume v0.7.2
[INFO] [stderr]    Compiling fluent-template-macros v0.5.13
[INFO] [stderr]     Checking rental v0.5.5
[INFO] [stderr]     Checking fluent-bundle v0.12.0
[INFO] [stderr]     Checking fluent v0.12.0
[INFO] [stderr]     Checking fluent-templates v0.5.13
[INFO] [stderr]     Checking cardpack v0.3.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 22s
[INFO] running `Command { std: "docker" "inspect" "bcf97ad86028108e0fd228fe3a289defbaa1a7249618f73a0ee4cf2f541ff9d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcf97ad86028108e0fd228fe3a289defbaa1a7249618f73a0ee4cf2f541ff9d4", kill_on_drop: false }`
[INFO] [stdout] bcf97ad86028108e0fd228fe3a289defbaa1a7249618f73a0ee4cf2f541ff9d4