[INFO] fetching crate ipld-block-builder 0.4.1...
[INFO] documenting ipld-block-builder-0.4.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate ipld-block-builder 0.4.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ipld-block-builder 0.4.1 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 ipld-block-builder 0.4.1
[INFO] finished tweaking crates.io crate ipld-block-builder 0.4.1
[INFO] tweaked toml for crates.io crate ipld-block-builder 0.4.1 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cached v0.12.0
[INFO] [stderr]   Downloaded cid v0.5.1
[INFO] [stderr]   Downloaded libipld-cbor-derive v0.3.0
[INFO] [stderr]   Downloaded libipld-macro v0.3.0
[INFO] [stderr]   Downloaded libipld-cbor v0.3.0
[INFO] [stderr]   Downloaded libipld-core v0.3.1
[INFO] [stderr]   Downloaded libipld v0.3.1
[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] 93957caf7985af4b9bab3a943b064af68dbfd487d2b78c99931d87e645ae3f34
[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" "93957caf7985af4b9bab3a943b064af68dbfd487d2b78c99931d87e645ae3f34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "93957caf7985af4b9bab3a943b064af68dbfd487d2b78c99931d87e645ae3f34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93957caf7985af4b9bab3a943b064af68dbfd487d2b78c99931d87e645ae3f34", kill_on_drop: false }`
[INFO] [stdout] 93957caf7985af4b9bab3a943b064af68dbfd487d2b78c99931d87e645ae3f34
[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] 6e91cfcdcf778c0bf0eccf704ca12ce6706eabff167df9eb63215c89ac32ab64
[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" "6e91cfcdcf778c0bf0eccf704ca12ce6706eabff167df9eb63215c89ac32ab64", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.39
[INFO] [stderr]     Checking block-padding v0.2.1
[INFO] [stderr]    Compiling data-encoding v2.3.0
[INFO] [stderr]     Checking unsigned-varint v0.5.0
[INFO] [stderr]     Checking base-x v0.2.6
[INFO] [stderr]     Checking blake2s_simd v0.5.10
[INFO] [stderr]     Checking blake2b_simd v0.5.10
[INFO] [stderr]     Checking cached v0.12.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking sha-1 v0.9.1
[INFO] [stderr]     Checking sha3 v0.9.1
[INFO] [stderr]     Checking sha2 v0.9.1
[INFO] [stderr]     Checking multihash v0.11.4
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling data-encoding-macro-internal v0.1.8
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]    Compiling libipld-cbor-derive v0.3.0
[INFO] [stderr]    Compiling async-trait v0.1.40
[INFO] [stderr]     Checking async-std v1.6.3
[INFO] [stderr]     Checking data-encoding-macro v0.1.8
[INFO] [stderr]     Checking multibase v0.8.0
[INFO] [stderr]     Checking cid v0.5.1
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking libipld-core v0.3.1
[INFO] [stderr]     Checking libipld-macro v0.3.0
[INFO] [stderr]     Checking libipld-cbor v0.3.0
[INFO] [stderr]     Checking libipld v0.3.1
[INFO] [stderr]  Documenting ipld-block-builder v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.86s
[INFO] running `Command { std: "docker" "inspect" "6e91cfcdcf778c0bf0eccf704ca12ce6706eabff167df9eb63215c89ac32ab64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e91cfcdcf778c0bf0eccf704ca12ce6706eabff167df9eb63215c89ac32ab64", kill_on_drop: false }`
[INFO] [stdout] 6e91cfcdcf778c0bf0eccf704ca12ce6706eabff167df9eb63215c89ac32ab64