[INFO] cloning repository https://github.com/Nightfall/MCMUCH-Rust-Website
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Nightfall/MCMUCH-Rust-Website" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNightfall%2FMCMUCH-Rust-Website", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNightfall%2FMCMUCH-Rust-Website'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 01babbd4c2ca0966b2f0612b761d25388fa8b49d
[INFO] documenting Nightfall/MCMUCH-Rust-Website against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNightfall%2FMCMUCH-Rust-Website" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Nightfall/MCMUCH-Rust-Website on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Nightfall/MCMUCH-Rust-Website
[INFO] finished tweaking git repo https://github.com/Nightfall/MCMUCH-Rust-Website
[INFO] tweaked toml for git repo https://github.com/Nightfall/MCMUCH-Rust-Website written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/Nightfall/MCMUCH-Rust-Website already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /workspace/builds/worker-10/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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" "+1.46.0" "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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] beb30ec81f5dfec951cebd3d409de9c12cd94d195d955a868bf9a41d8e210d89
[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" "beb30ec81f5dfec951cebd3d409de9c12cd94d195d955a868bf9a41d8e210d89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "beb30ec81f5dfec951cebd3d409de9c12cd94d195d955a868bf9a41d8e210d89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "beb30ec81f5dfec951cebd3d409de9c12cd94d195d955a868bf9a41d8e210d89", kill_on_drop: false }`
[INFO] [stdout] beb30ec81f5dfec951cebd3d409de9c12cd94d195d955a868bf9a41d8e210d89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+1.46.0" "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] e1148088a142fa17694902f6d81c223b6e397015f9c487f7b9655591d191fdb1
[INFO] running `Command { std: "docker" "start" "-a" "e1148088a142fa17694902f6d81c223b6e397015f9c487f7b9655591d191fdb1", kill_on_drop: false }`
[INFO] [stderr]     Checking sequence_trie v0.3.6
[INFO] [stderr]     Checking handlebars v3.4.0
[INFO] [stderr]     Checking logger v0.4.0
[INFO] [stderr]     Checking router v0.6.0
[INFO] [stderr]     Checking mount v0.4.0
[INFO] [stderr]     Checking staticfile v0.5.0
[INFO] [stderr]     Checking handlebars-iron v0.29.0
[INFO] [stderr]  Documenting mcmuch-rust-website v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `serde_json::builder`
[INFO] [stdout]  --> src/pages.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use serde_json::builder::ObjectBuilder;
[INFO] [stdout]   |                 ^^^^^^^ could not find `builder` in `serde_json`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `mcmuch-rust-website`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name mcmuch_rust_website 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 handlebars_iron=/opt/rustwide/target/debug/deps/libhandlebars_iron-121438c2aabc62b2.rmeta --extern iron=/opt/rustwide/target/debug/deps/libiron-0479cc37cd80d62f.rmeta --extern logger=/opt/rustwide/target/debug/deps/liblogger-a126151ed453f55c.rmeta --extern mount=/opt/rustwide/target/debug/deps/libmount-e931312af50e17d5.rmeta --extern router=/opt/rustwide/target/debug/deps/librouter-89181cecaa07ce61.rmeta --extern rustc_serialize=/opt/rustwide/target/debug/deps/librustc_serialize-0e355727854478f2.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-dbda8714378e19d3.rmeta --extern staticfile=/opt/rustwide/target/debug/deps/libstaticfile-afb4082ac39cf8a7.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "e1148088a142fa17694902f6d81c223b6e397015f9c487f7b9655591d191fdb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1148088a142fa17694902f6d81c223b6e397015f9c487f7b9655591d191fdb1", kill_on_drop: false }`
[INFO] [stdout] e1148088a142fa17694902f6d81c223b6e397015f9c487f7b9655591d191fdb1