[INFO] fetching crate gust 0.1.4...
[INFO] documenting gust-0.1.4 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate gust 0.1.4 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate gust 0.1.4 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 gust 0.1.4
[INFO] finished tweaking crates.io crate gust 0.1.4
[INFO] tweaked toml for crates.io crate gust 0.1.4 written to /workspace/builds/worker-5/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]  Downloading crates ...
[INFO] [stderr]   Downloaded liquid v0.13.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 7d5c7aaf21a95e9f885cd0bde054ac7666ce192b623facb5f4579d1f8be0cde3
[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" "7d5c7aaf21a95e9f885cd0bde054ac7666ce192b623facb5f4579d1f8be0cde3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7d5c7aaf21a95e9f885cd0bde054ac7666ce192b623facb5f4579d1f8be0cde3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d5c7aaf21a95e9f885cd0bde054ac7666ce192b623facb5f4579d1f8be0cde3", kill_on_drop: false }`
[INFO] [stdout] 7d5c7aaf21a95e9f885cd0bde054ac7666ce192b623facb5f4579d1f8be0cde3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 030da1cc22bbd0e272857498bc9a30362aa00d6504df1c49bc92efa3c647e1f1
[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" "030da1cc22bbd0e272857498bc9a30362aa00d6504df1c49bc92efa3c647e1f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling bytecount v0.4.0
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling cargo_metadata v0.6.4
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling skeptic v0.13.4
[INFO] [stderr]    Compiling liquid v0.13.7
[INFO] [stdout] error[E0283]: type annotations needed for `std::string::String`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/liquid-0.13.7/src/compiler/parser.rs:87:80
[INFO] [stdout]    |
[INFO] [stdout] 87 |                     Token::Identifier(ref x) => indexes.push(Index::with_key(x.as_ref())),
[INFO] [stdout]    |                                                                                ^^^^^^ cannot infer type for struct `std::string::String`
[INFO] [stdout] ...
[INFO] [stdout] 99 |                             .ok_or_else(|| Error::Parser(format!("Invalid index {}", x)))?;
[INFO] [stdout]    |                                                          ------------------------------ consider giving `res` a type
[INFO] [stdout]    |
[INFO] [stdout]    = note: cannot satisfy `std::string::String: std::convert::AsRef<_>`
[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 E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `liquid`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "030da1cc22bbd0e272857498bc9a30362aa00d6504df1c49bc92efa3c647e1f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "030da1cc22bbd0e272857498bc9a30362aa00d6504df1c49bc92efa3c647e1f1", kill_on_drop: false }`
[INFO] [stdout] 030da1cc22bbd0e272857498bc9a30362aa00d6504df1c49bc92efa3c647e1f1