[INFO] fetching crate prefixopt_derive 0.4.0...
[INFO] documenting prefixopt_derive-0.4.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate prefixopt_derive 0.4.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate prefixopt_derive 0.4.0 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 prefixopt_derive 0.4.0
[INFO] finished tweaking crates.io crate prefixopt_derive 0.4.0
[INFO] tweaked toml for crates.io crate prefixopt_derive 0.4.0 written to /workspace/builds/worker-2/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 scopeguard v0.2.0
[INFO] [stderr]   Downloaded map_in_place v0.1.0
[INFO] [stderr]   Downloaded prefixopt v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 618bc898a51a08a250d3a001a247b32f22303fc448b0b29e95a1de91cc237ef0
[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" "618bc898a51a08a250d3a001a247b32f22303fc448b0b29e95a1de91cc237ef0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "618bc898a51a08a250d3a001a247b32f22303fc448b0b29e95a1de91cc237ef0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "618bc898a51a08a250d3a001a247b32f22303fc448b0b29e95a1de91cc237ef0", kill_on_drop: false }`
[INFO] [stdout] 618bc898a51a08a250d3a001a247b32f22303fc448b0b29e95a1de91cc237ef0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] b24738377aac9cce6154fa1adab0049221c5a00312ad226323a44efe52bfe3b8
[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" "b24738377aac9cce6154fa1adab0049221c5a00312ad226323a44efe52bfe3b8", kill_on_drop: false }`
[INFO] [stderr]     Checking scopeguard v0.2.0
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]     Checking syn v0.11.11
[INFO] [stderr]    Compiling map_in_place v0.1.0
[INFO] [stderr]     Checking prefixopt v0.4.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]  Documenting prefixopt_derive v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling prefixopt_derive v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/enum_data.rs:51:38
[INFO] [stdout]    |
[INFO] [stdout] 51 |                     .map(|id| id as &::std::fmt::Display)
[INFO] [stdout]    |                                      ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::fmt::Display)`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.66s
[INFO] running `Command { std: "docker" "inspect" "b24738377aac9cce6154fa1adab0049221c5a00312ad226323a44efe52bfe3b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b24738377aac9cce6154fa1adab0049221c5a00312ad226323a44efe52bfe3b8", kill_on_drop: false }`
[INFO] [stdout] b24738377aac9cce6154fa1adab0049221c5a00312ad226323a44efe52bfe3b8