[INFO] fetching crate async-smtp 0.3.4...
[INFO] documenting async-smtp-0.3.4 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate async-smtp 0.3.4 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate async-smtp 0.3.4 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 async-smtp 0.3.4
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate async-smtp 0.3.4
[INFO] tweaked toml for crates.io crate async-smtp 0.3.4 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate async-smtp 0.3.4 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fast-socks5 v0.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 8f5e619b5c3713426dc526ed8179cda63ae1be173c1794fec103aec8b0b4ff90
[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" "8f5e619b5c3713426dc526ed8179cda63ae1be173c1794fec103aec8b0b4ff90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f5e619b5c3713426dc526ed8179cda63ae1be173c1794fec103aec8b0b4ff90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f5e619b5c3713426dc526ed8179cda63ae1be173c1794fec103aec8b0b4ff90", kill_on_drop: false }`
[INFO] [stdout] 8f5e619b5c3713426dc526ed8179cda63ae1be173c1794fec103aec8b0b4ff90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 495bec2b8bdf8d4da2920ac19139200fdf48639c8eb09b558da90bf940b05a22
[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" "495bec2b8bdf8d4da2920ac19139200fdf48639c8eb09b558da90bf940b05a22", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.36
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.67
[INFO] [stderr]    Compiling bumpalo v3.4.0
[INFO] [stderr]    Compiling cc v1.0.58
[INFO] [stderr]    Compiling wasm-bindgen v0.2.67
[INFO] [stderr]     Checking once_cell v1.4.0
[INFO] [stderr]     Checking fastrand v1.3.3
[INFO] [stderr]     Checking parking v1.0.6
[INFO] [stderr]     Checking waker-fn v1.0.0
[INFO] [stderr]     Checking event-listener v2.2.1
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling lexical-core v0.7.4
[INFO] [stderr]     Checking async-task v3.0.0
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]     Checking send_wrapper v0.4.0
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking bufstream v0.1.4
[INFO] [stderr]     Checking concurrent-queue v1.1.2
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking hostname v0.1.5
[INFO] [stderr]     Checking futures-task v0.3.5
[INFO] [stderr]     Checking futures-lite v0.1.10
[INFO] [stderr]     Checking async-channel v1.2.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking blocking v0.4.7
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.67
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.67
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling async-trait v0.1.36
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.67
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking pin-project v0.4.23
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking js-sys v0.3.44
[INFO] [stderr]     Checking web-sys v0.3.44
[INFO] [stderr]     Checking smol v0.1.18
[INFO] [stderr]     Checking gloo-timers v0.2.1
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]     Checking async-std v1.6.2
[INFO] [stderr]     Checking async-native-tls v0.3.3
[INFO] [stderr]  Documenting async-smtp v0.3.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 37.16s
[INFO] running `Command { std: "docker" "inspect" "495bec2b8bdf8d4da2920ac19139200fdf48639c8eb09b558da90bf940b05a22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "495bec2b8bdf8d4da2920ac19139200fdf48639c8eb09b558da90bf940b05a22", kill_on_drop: false }`
[INFO] [stdout] 495bec2b8bdf8d4da2920ac19139200fdf48639c8eb09b558da90bf940b05a22