[INFO] fetching crate credentials 0.12.0...
[INFO] documenting credentials-0.12.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate credentials 0.12.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate credentials 0.12.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate credentials 0.12.0
[INFO] finished tweaking crates.io crate credentials 0.12.0
[INFO] tweaked toml for crates.io crate credentials 0.12.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate credentials 0.12.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", 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] 0d50a2b2e0421f5700dece0cd2f8be5b3d8fad837ea57f6ee0e5e14346eb4596
[INFO] running `Command { std: "docker" "start" "-a" "0d50a2b2e0421f5700dece0cd2f8be5b3d8fad837ea57f6ee0e5e14346eb4596", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d50a2b2e0421f5700dece0cd2f8be5b3d8fad837ea57f6ee0e5e14346eb4596", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d50a2b2e0421f5700dece0cd2f8be5b3d8fad837ea57f6ee0e5e14346eb4596", kill_on_drop: false }`
[INFO] [stdout] 0d50a2b2e0421f5700dece0cd2f8be5b3d8fad837ea57f6ee0e5e14346eb4596
[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" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--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] 9ee1ddc1fc02c4f0c69efa16e7b4d0d010f6c516473117142969c03ab1aa249e
[INFO] running `Command { std: "docker" "start" "-a" "9ee1ddc1fc02c4f0c69efa16e7b4d0d010f6c516473117142969c03ab1aa249e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling indexmap v1.5.1
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking flate2 v1.0.17
[INFO] [stderr]     Checking native-tls v0.2.4
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]     Checking h2 v0.1.26
[INFO] [stderr]     Checking hyper v0.12.35
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking serde v1.0.115
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]     Checking cookie_store v0.7.0
[INFO] [stderr]     Checking reqwest v0.9.24
[INFO] [stderr]  Documenting credentials v0.12.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.43s
[INFO] running `Command { std: "docker" "inspect" "9ee1ddc1fc02c4f0c69efa16e7b4d0d010f6c516473117142969c03ab1aa249e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ee1ddc1fc02c4f0c69efa16e7b4d0d010f6c516473117142969c03ab1aa249e", kill_on_drop: false }`
[INFO] [stdout] 9ee1ddc1fc02c4f0c69efa16e7b4d0d010f6c516473117142969c03ab1aa249e