[INFO] fetching crate sampler 0.2.0...
[INFO] documenting sampler-0.2.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate sampler 0.2.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate sampler 0.2.0 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 sampler 0.2.0
[INFO] finished tweaking crates.io crate sampler 0.2.0
[INFO] tweaked toml for crates.io crate sampler 0.2.0 written to /workspace/builds/worker-3/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]  Downloading crates ...
[INFO] [stderr]   Downloaded itoa v0.1.1
[INFO] [stderr]   Downloaded pitch_calc v0.11.1
[INFO] [stderr]   Downloaded instrument v0.2.0
[INFO] [stderr]   Downloaded serde_json v0.7.4
[INFO] [stderr]   Downloaded hound v2.0.0
[INFO] [stderr]   Downloaded time_calc v0.11.1
[INFO] [stderr]   Downloaded portaudio v0.6.4
[INFO] [stderr]   Downloaded sample v0.6.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 6a9612e5ea8d31fed768b7ba1bfa2ea5d70772401a8e64a62c2e64d4f3ce721c
[INFO] running `Command { std: "docker" "start" "-a" "6a9612e5ea8d31fed768b7ba1bfa2ea5d70772401a8e64a62c2e64d4f3ce721c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a9612e5ea8d31fed768b7ba1bfa2ea5d70772401a8e64a62c2e64d4f3ce721c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a9612e5ea8d31fed768b7ba1bfa2ea5d70772401a8e64a62c2e64d4f3ce721c", kill_on_drop: false }`
[INFO] [stdout] 6a9612e5ea8d31fed768b7ba1bfa2ea5d70772401a8e64a62c2e64d4f3ce721c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 45327a847289f035f5a453953705da30220d832eef557cc1d0b127f9d1e7d6a5
[INFO] running `Command { std: "docker" "start" "-a" "45327a847289f035f5a453953705da30220d832eef557cc1d0b127f9d1e7d6a5", kill_on_drop: false }`
[INFO] [stderr]     Checking hound v2.0.0
[INFO] [stderr]     Checking sample v0.6.2
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-iter v0.1.41
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking pitch_calc v0.11.1
[INFO] [stderr]     Checking time_calc v0.11.1
[INFO] [stderr]     Checking instrument v0.2.0
[INFO] [stderr]  Documenting sampler v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.50s
[INFO] running `Command { std: "docker" "inspect" "45327a847289f035f5a453953705da30220d832eef557cc1d0b127f9d1e7d6a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45327a847289f035f5a453953705da30220d832eef557cc1d0b127f9d1e7d6a5", kill_on_drop: false }`
[INFO] [stdout] 45327a847289f035f5a453953705da30220d832eef557cc1d0b127f9d1e7d6a5