[INFO] fetching crate mockers_derive 0.21.0...
[INFO] documenting mockers_derive-0.21.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate mockers_derive 0.21.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate mockers_derive 0.21.0 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 mockers_derive 0.21.0
[INFO] finished tweaking crates.io crate mockers_derive 0.21.0
[INFO] tweaked toml for crates.io crate mockers_derive 0.21.0 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] [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]     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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 34412996514eef67ec5b1c3cbee98972c599622050b1f4e928662b4d26f8949c
[INFO] running `Command { std: "docker" "start" "-a" "34412996514eef67ec5b1c3cbee98972c599622050b1f4e928662b4d26f8949c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "34412996514eef67ec5b1c3cbee98972c599622050b1f4e928662b4d26f8949c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34412996514eef67ec5b1c3cbee98972c599622050b1f4e928662b4d26f8949c", kill_on_drop: false }`
[INFO] [stdout] 34412996514eef67ec5b1c3cbee98972c599622050b1f4e928662b4d26f8949c
[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] 89fbb6bde8161785d3f18311926467a2d708b8dc4ff2cfb1d570278c29d1ad1c
[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" "89fbb6bde8161785d3f18311926467a2d708b8dc4ff2cfb1d570278c29d1ad1c", kill_on_drop: false }`
[INFO] [stderr]     Checking proc-macro2 v0.4.30
[INFO] [stderr]    Compiling proc-quote-impl v0.2.2
[INFO] [stderr]    Compiling indoc-impl v0.3.6
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking syn v0.15.44
[INFO] [stderr]     Checking indoc v0.3.6
[INFO] [stderr]     Checking proc-quote v0.2.2
[INFO] [stderr]  Documenting mockers_derive v0.21.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.85s
[INFO] running `Command { std: "docker" "inspect" "89fbb6bde8161785d3f18311926467a2d708b8dc4ff2cfb1d570278c29d1ad1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89fbb6bde8161785d3f18311926467a2d708b8dc4ff2cfb1d570278c29d1ad1c", kill_on_drop: false }`
[INFO] [stdout] 89fbb6bde8161785d3f18311926467a2d708b8dc4ff2cfb1d570278c29d1ad1c