[INFO] fetching crate silver_surf 0.1.4...
[INFO] documenting silver_surf-0.1.4 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate silver_surf 0.1.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate silver_surf 0.1.4 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 silver_surf 0.1.4
[INFO] finished tweaking crates.io crate silver_surf 0.1.4
[INFO] tweaked toml for crates.io crate silver_surf 0.1.4 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded http-client v2.0.0
[INFO] [stderr]   Downloaded surf v2.0.0-alpha.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stdout] 0237787376f1f49327c041a83e2e2ee6a99a0edaaac8b675f9f65682a3cd15bd
[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" "0237787376f1f49327c041a83e2e2ee6a99a0edaaac8b675f9f65682a3cd15bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0237787376f1f49327c041a83e2e2ee6a99a0edaaac8b675f9f65682a3cd15bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0237787376f1f49327c041a83e2e2ee6a99a0edaaac8b675f9f65682a3cd15bd", kill_on_drop: false }`
[INFO] [stdout] 0237787376f1f49327c041a83e2e2ee6a99a0edaaac8b675f9f65682a3cd15bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stdout] c23251f03df9cc60cec03573533680218ebf680a3c761214c4abd4b2837ce17e
[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" "c23251f03df9cc60cec03573533680218ebf680a3c761214c4abd4b2837ce17e", kill_on_drop: false }`
[INFO] [stderr]    Compiling curl v0.4.33
[INFO] [stderr]     Checking infer v0.1.7
[INFO] [stderr]    Compiling isahc v0.9.8
[INFO] [stderr]    Compiling isahc v0.8.2
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.4+1.41.0
[INFO] [stderr]    Compiling curl-sys v0.4.36+curl-7.71.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking polling v0.1.7
[INFO] [stderr]     Checking libz-sys v1.1.1
[INFO] [stderr]     Checking omnom v2.1.2
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]     Checking byte-pool v0.2.2
[INFO] [stderr]     Checking native-tls v0.2.4
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking tracing v0.1.19
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking async-io v0.1.11
[INFO] [stderr]     Checking tracing-futures v0.2.4
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.67
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking async-executor v0.1.2
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.67
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.67
[INFO] [stderr]     Checking wasm-bindgen v0.2.67
[INFO] [stderr]     Checking sluice v0.5.2
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking js-sys v0.3.44
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking web-sys v0.3.44
[INFO] [stderr]     Checking gloo-timers v0.2.1
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]     Checking async-std v1.6.3
[INFO] [stderr]     Checking http-types v1.3.1
[INFO] [stderr]     Checking async-native-tls v0.3.3
[INFO] [stderr]     Checking async-h1 v1.1.2
[INFO] [stderr]     Checking http-client v2.0.0
[INFO] [stderr]     Checking surf v2.0.0-alpha.1
[INFO] [stderr]  Documenting silver_surf v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 09s
[INFO] running `Command { std: "docker" "inspect" "c23251f03df9cc60cec03573533680218ebf680a3c761214c4abd4b2837ce17e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c23251f03df9cc60cec03573533680218ebf680a3c761214c4abd4b2837ce17e", kill_on_drop: false }`
[INFO] [stdout] c23251f03df9cc60cec03573533680218ebf680a3c761214c4abd4b2837ce17e