[INFO] fetching crate isolanguage-1 0.1.0...
[INFO] documenting isolanguage-1-0.1.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate isolanguage-1 0.1.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate isolanguage-1 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 isolanguage-1 0.1.0
[INFO] finished tweaking crates.io crate isolanguage-1 0.1.0
[INFO] tweaked toml for crates.io crate isolanguage-1 0.1.0 written to /workspace/builds/worker-13/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 4f90519a2b4ce1cc23f785d0e27d29b44b8e070e874e27543f8c8e83d4570c7a
[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" "4f90519a2b4ce1cc23f785d0e27d29b44b8e070e874e27543f8c8e83d4570c7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f90519a2b4ce1cc23f785d0e27d29b44b8e070e874e27543f8c8e83d4570c7a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f90519a2b4ce1cc23f785d0e27d29b44b8e070e874e27543f8c8e83d4570c7a", kill_on_drop: false }`
[INFO] [stdout] 4f90519a2b4ce1cc23f785d0e27d29b44b8e070e874e27543f8c8e83d4570c7a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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] 50f225f47860a90bcd08fcd8bd66c636f27dc13b79d53ef37375a287d3509248
[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" "50f225f47860a90bcd08fcd8bd66c636f27dc13b79d53ef37375a287d3509248", kill_on_drop: false }`
[INFO] [stderr]  Documenting isolanguage-1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `Command { std: "docker" "inspect" "50f225f47860a90bcd08fcd8bd66c636f27dc13b79d53ef37375a287d3509248", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50f225f47860a90bcd08fcd8bd66c636f27dc13b79d53ef37375a287d3509248", kill_on_drop: false }`
[INFO] [stdout] 50f225f47860a90bcd08fcd8bd66c636f27dc13b79d53ef37375a287d3509248