[INFO] cloning repository https://github.com/chess-seventh/RSS2Mutt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chess-seventh/RSS2Mutt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchess-seventh%2FRSS2Mutt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchess-seventh%2FRSS2Mutt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d5da7de90575f1c4db769b7968cd0fd34ea7070c
[INFO] documenting chess-seventh/RSS2Mutt against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchess-seventh%2FRSS2Mutt" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chess-seventh/RSS2Mutt 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 git repo https://github.com/chess-seventh/RSS2Mutt
[INFO] finished tweaking git repo https://github.com/chess-seventh/RSS2Mutt
[INFO] tweaked toml for git repo https://github.com/chess-seventh/RSS2Mutt written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/chess-seventh/RSS2Mutt 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]  Downloading crates ...
[INFO] [stderr]   Downloaded native-tls v0.2.1
[INFO] [stderr]   Downloaded derive_builder_core v0.3.0
[INFO] [stderr]   Downloaded darling_core v0.6.3
[INFO] [stderr]   Downloaded derive_builder v0.6.0
[INFO] [stderr]   Downloaded hyper v0.12.12
[INFO] [stderr]   Downloaded darling_macro v0.6.3
[INFO] [stderr]   Downloaded tempfile v3.0.4
[INFO] [stderr]   Downloaded quick-xml v0.13.0
[INFO] [stderr]   Downloaded html2runes v1.0.0
[INFO] [stderr]   Downloaded reqwest v0.9.3
[INFO] [stderr]   Downloaded encoding_rs v0.8.10
[INFO] [stderr]   Downloaded rss v1.6.0
[INFO] [stderr]   Downloaded openssl v0.10.14
[INFO] [stderr]   Downloaded darling v0.6.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 87f119299d51535ba3b21fc12aa1457daedd928d22cc4115a0e25f7f588a7ff4
[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" "87f119299d51535ba3b21fc12aa1457daedd928d22cc4115a0e25f7f588a7ff4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87f119299d51535ba3b21fc12aa1457daedd928d22cc4115a0e25f7f588a7ff4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87f119299d51535ba3b21fc12aa1457daedd928d22cc4115a0e25f7f588a7ff4", kill_on_drop: false }`
[INFO] [stdout] 87f119299d51535ba3b21fc12aa1457daedd928d22cc4115a0e25f7f588a7ff4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] aca5dd6083994524b7862868133417183d19737f735edbe62d83e9467b6418e1
[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" "aca5dd6083994524b7862868133417183d19737f735edbe62d83e9467b6418e1", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.3.0
[INFO] [stderr]     Checking futures v0.1.25
[INFO] [stderr]    Compiling proc-macro2 v0.4.20
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling openssl v0.10.14
[INFO] [stderr]    Compiling native-tls v0.2.1
[INFO] [stderr]    Compiling encoding_rs v0.8.10
[INFO] [stderr]     Checking serde v0.9.15
[INFO] [stderr]    Compiling derive_builder v0.6.0
[INFO] [stderr]     Checking unicode-segmentation v1.2.1
[INFO] [stderr]    Compiling unicase v2.2.0
[INFO] [stderr]     Checking term_size v0.2.3
[INFO] [stderr]    Compiling openssl-sys v0.9.39
[INFO] [stderr]     Checking utf-8 v0.6.0
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]    Compiling rand_core v0.2.2
[INFO] [stderr]     Checking http v0.1.13
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]    Compiling phf_shared v0.7.23
[INFO] [stderr]     Checking tendril v0.2.4
[INFO] [stderr]     Checking libflate v0.1.18
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking clap v2.20.5
[INFO] [stderr]     Checking phf v0.7.23
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking mime v0.3.12
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]     Checking parking_lot_core v0.3.1
[INFO] [stderr]     Checking uuid v0.7.1
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling phf_codegen v0.7.23
[INFO] [stderr]    Compiling string_cache_codegen v0.3.1
[INFO] [stderr]     Checking tokio-executor v0.1.5
[INFO] [stderr]     Checking tokio-io v0.1.9
[INFO] [stderr]     Checking futures-cpupool v0.1.8
[INFO] [stderr]     Checking want v0.0.6
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking tokio-threadpool v0.1.7
[INFO] [stderr]     Checking tokio-current-thread v0.1.3
[INFO] [stderr]     Checking tokio-timer v0.2.7
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]    Compiling html5ever v0.13.1
[INFO] [stderr]     Checking tokio-reactor v0.1.6
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]    Compiling string_cache v0.4.0
[INFO] [stderr]    Compiling html5ever-atoms v0.2.2
[INFO] [stderr]     Checking h2 v0.1.13
[INFO] [stderr]     Checking tokio-fs v0.1.3
[INFO] [stderr]     Checking tokio-udp v0.1.2
[INFO] [stderr]     Checking tokio-uds v0.2.2
[INFO] [stderr]     Checking tokio-tcp v0.1.2
[INFO] [stderr]     Checking tokio v0.1.11
[INFO] [stderr]     Checking hyper v0.12.12
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling darling_core v0.6.3
[INFO] [stderr]     Checking serde_urlencoded v0.5.3
[INFO] [stderr]     Checking serde_json v1.0.32
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]     Checking failure v0.1.2
[INFO] [stderr]     Checking hyper-tls v0.3.1
[INFO] [stderr]     Checking quick-xml v0.13.0
[INFO] [stderr]     Checking reqwest v0.9.3
[INFO] [stderr]     Checking html2runes v1.0.0
[INFO] [stderr]    Compiling darling_macro v0.6.3
[INFO] [stderr]    Compiling darling v0.6.3
[INFO] [stderr]    Compiling derive_builder_core v0.3.0
[INFO] [stderr]     Checking rss v1.6.0
[INFO] [stderr]  Documenting rss_parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] running `Command { std: "docker" "inspect" "aca5dd6083994524b7862868133417183d19737f735edbe62d83e9467b6418e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aca5dd6083994524b7862868133417183d19737f735edbe62d83e9467b6418e1", kill_on_drop: false }`
[INFO] [stdout] aca5dd6083994524b7862868133417183d19737f735edbe62d83e9467b6418e1