[INFO] fetching crate salvo_core 0.2.4...
[INFO] documenting salvo_core-0.2.4 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate salvo_core 0.2.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate salvo_core 0.2.4 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 salvo_core 0.2.4
[INFO] finished tweaking crates.io crate salvo_core 0.2.4
[INFO] tweaked toml for crates.io crate salvo_core 0.2.4 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] [stderr]     Blocking waiting for file lock on package cache
[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 futures-test v0.3.5
[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] 22836e10c9b0763399a594527a7ba03728345370bc8daec03dcbf560536df854
[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" "22836e10c9b0763399a594527a7ba03728345370bc8daec03dcbf560536df854", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22836e10c9b0763399a594527a7ba03728345370bc8daec03dcbf560536df854", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22836e10c9b0763399a594527a7ba03728345370bc8daec03dcbf560536df854", kill_on_drop: false }`
[INFO] [stdout] 22836e10c9b0763399a594527a7ba03728345370bc8daec03dcbf560536df854
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f21a83b539e03637c29b3f9d003ac802b0003c855c7e6e317f7a2b686e64eacc
[INFO] running `Command { std: "docker" "start" "-a" "f21a83b539e03637c29b3f9d003ac802b0003c855c7e6e317f7a2b686e64eacc", kill_on_drop: false }`
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]    Compiling slog v2.5.2
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking unchecked-index v0.2.2
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking rust-ini v0.13.0
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking yansi v0.5.0
[INFO] [stderr]     Checking display_bytes v0.2.1
[INFO] [stderr]     Checking state v0.4.1
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]    Compiling time v0.2.17
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking signal-hook-registry v1.2.1
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking twoway v0.2.1
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking nom v4.2.3
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking tempdir v0.3.7
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking futures-util v0.3.5
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking multimap v0.8.2
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking slog-async v2.5.0
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking time-macros v0.1.0
[INFO] [stderr]     Checking cookie v0.12.0
[INFO] [stderr]     Checking textnonce v0.6.5
[INFO] [stderr]     Checking slog-term v2.6.0
[INFO] [stderr]     Checking serde_test v0.8.23
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking serde-hjson v0.8.2
[INFO] [stderr]     Checking config v0.9.3
[INFO] [stderr]     Checking futures-executor v0.3.5
[INFO] [stderr]     Checking double-checked-cell-async v2.0.2
[INFO] [stderr]     Checking futures v0.3.5
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking h2 v0.2.6
[INFO] [stderr]     Checking hyper v0.13.7
[INFO] [stderr]  Documenting salvo_core v0.2.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 55.31s
[INFO] running `Command { std: "docker" "inspect" "f21a83b539e03637c29b3f9d003ac802b0003c855c7e6e317f7a2b686e64eacc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f21a83b539e03637c29b3f9d003ac802b0003c855c7e6e317f7a2b686e64eacc", kill_on_drop: false }`
[INFO] [stdout] f21a83b539e03637c29b3f9d003ac802b0003c855c7e6e317f7a2b686e64eacc