[INFO] fetching crate defrag-dirs 0.1.1...
[INFO] documenting defrag-dirs-0.1.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate defrag-dirs 0.1.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate defrag-dirs 0.1.1 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 defrag-dirs 0.1.1
[INFO] finished tweaking crates.io crate defrag-dirs 0.1.1
[INFO] tweaked toml for crates.io crate defrag-dirs 0.1.1 written to /workspace/builds/worker-9/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 derive-error v0.0.3
[INFO] [stderr]   Downloaded minilzo v0.1.2
[INFO] [stderr]   Downloaded btrfs2 v1.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 79940b4b249755cffe67b9e64df4f25a0fc4f827700557bcf64cef7c9d29ef2e
[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" "79940b4b249755cffe67b9e64df4f25a0fc4f827700557bcf64cef7c9d29ef2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79940b4b249755cffe67b9e64df4f25a0fc4f827700557bcf64cef7c9d29ef2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79940b4b249755cffe67b9e64df4f25a0fc4f827700557bcf64cef7c9d29ef2e", kill_on_drop: false }`
[INFO] [stdout] 79940b4b249755cffe67b9e64df4f25a0fc4f827700557bcf64cef7c9d29ef2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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] 0c55b5c8adfd75bee9953e552ade87fffdda91e7110ed31e9965df767576dd89
[INFO] running `Command { std: "docker" "start" "-a" "0c55b5c8adfd75bee9953e552ade87fffdda91e7110ed31e9965df767576dd89", kill_on_drop: false }`
[INFO] [stderr]    Compiling build_const v0.2.1
[INFO] [stderr]     Checking uuid v0.3.1
[INFO] [stderr]     Checking same-file v0.1.3
[INFO] [stderr]    Compiling case v0.1.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking minilzo-sys v0.1.0
[INFO] [stderr]     Checking nix v0.8.1
[INFO] [stderr]     Checking minilzo v0.1.2
[INFO] [stderr]     Checking walkdir v1.0.7
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]    Compiling derive-error v0.0.3
[INFO] [stderr]     Checking btrfs2 v1.2.2
[INFO] [stderr]  Documenting defrag-dirs v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `alloc_system`
[INFO] [stdout]   --> src/main.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | extern crate alloc_system;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `defrag-dirs`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name defrag_dirs src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern btrfs2=/opt/rustwide/target/debug/deps/libbtrfs2-0db249822bc9ca7a.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-d8de5d56e70a343c.rmeta --extern derive_error=/opt/rustwide/target/debug/deps/libderive_error-f7e94ead6e603701.so --extern nix=/opt/rustwide/target/debug/deps/libnix-bf0669fed6c7c97c.rmeta --extern time=/opt/rustwide/target/debug/deps/libtime-bb712bfb1e6d5b0b.rmeta --extern walkdir=/opt/rustwide/target/debug/deps/libwalkdir-07f23ab57d2e8c5e.rmeta --cap-lints=warn --crate-version 0.1.1` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "0c55b5c8adfd75bee9953e552ade87fffdda91e7110ed31e9965df767576dd89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c55b5c8adfd75bee9953e552ade87fffdda91e7110ed31e9965df767576dd89", kill_on_drop: false }`
[INFO] [stdout] 0c55b5c8adfd75bee9953e552ade87fffdda91e7110ed31e9965df767576dd89