[INFO] fetching crate tracers-codegen 0.1.0...
[INFO] documenting tracers-codegen-0.1.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate tracers-codegen 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate tracers-codegen 0.1.0 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 tracers-codegen 0.1.0
[INFO] finished tweaking crates.io crate tracers-codegen 0.1.0
[INFO] tweaked toml for crates.io crate tracers-codegen 0.1.0 written to /workspace/builds/worker-4/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] f8e2e8169750cb0aec41871025f390ad9488ba93f20a9567eed664cbba69485f
[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" "f8e2e8169750cb0aec41871025f390ad9488ba93f20a9567eed664cbba69485f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f8e2e8169750cb0aec41871025f390ad9488ba93f20a9567eed664cbba69485f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8e2e8169750cb0aec41871025f390ad9488ba93f20a9567eed664cbba69485f", kill_on_drop: false }`
[INFO] [stdout] f8e2e8169750cb0aec41871025f390ad9488ba93f20a9567eed664cbba69485f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] aae1363c66ecc2668b03a4b2b055b31812142375191c2c4187a76f470ce76bb6
[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" "aae1363c66ecc2668b03a4b2b055b31812142375191c2c4187a76f470ce76bb6", kill_on_drop: false }`
[INFO] [stderr]    Compiling humansize v1.1.0
[INFO] [stderr]    Compiling askama_escape v0.2.0
[INFO] [stderr]     Checking strum v0.16.0
[INFO] [stderr]     Checking cc v1.0.59
[INFO] [stderr]     Checking pkg-config v0.3.18
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]     Checking syn v1.0.39
[INFO] [stderr]    Compiling strum_macros v0.16.0
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking serde_str v0.1.0
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling tracers-core v0.1.0
[INFO] [stderr]     Checking cargo_metadata v0.9.1
[INFO] [stderr]     Checking askama_shared v0.8.0
[INFO] [stderr]     Checking proc-macro-crate v0.1.5
[INFO] [stderr]    Compiling askama_derive v0.8.0
[INFO] [stderr]     Checking darling_core v0.10.2
[INFO] [stderr]     Checking darling v0.10.2
[INFO] [stderr]     Checking askama v0.8.0
[INFO] [stderr]  Documenting tracers-codegen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.42s
[INFO] running `Command { std: "docker" "inspect" "aae1363c66ecc2668b03a4b2b055b31812142375191c2c4187a76f470ce76bb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aae1363c66ecc2668b03a4b2b055b31812142375191c2c4187a76f470ce76bb6", kill_on_drop: false }`
[INFO] [stdout] aae1363c66ecc2668b03a4b2b055b31812142375191c2c4187a76f470ce76bb6