[INFO] cloning repository https://github.com/UnHumbleBen/serde-tutorial
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/UnHumbleBen/serde-tutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUnHumbleBen%2Fserde-tutorial", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUnHumbleBen%2Fserde-tutorial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cf3ef9af0f449ed6c74e67ce5a867643c7d38fab
[INFO] documenting UnHumbleBen/serde-tutorial against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUnHumbleBen%2Fserde-tutorial" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/UnHumbleBen/serde-tutorial on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/UnHumbleBen/serde-tutorial
[INFO] finished tweaking git repo https://github.com/UnHumbleBen/serde-tutorial
[INFO] tweaked toml for git repo https://github.com/UnHumbleBen/serde-tutorial written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/UnHumbleBen/serde-tutorial already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", 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] cdbc9072ecb1bc97820587b1a1cc565c1250ac2bb7093e3cc3abaae5d9e51b68
[INFO] running `Command { std: "docker" "start" "-a" "cdbc9072ecb1bc97820587b1a1cc565c1250ac2bb7093e3cc3abaae5d9e51b68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cdbc9072ecb1bc97820587b1a1cc565c1250ac2bb7093e3cc3abaae5d9e51b68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdbc9072ecb1bc97820587b1a1cc565c1250ac2bb7093e3cc3abaae5d9e51b68", kill_on_drop: false }`
[INFO] [stdout] cdbc9072ecb1bc97820587b1a1cc565c1250ac2bb7093e3cc3abaae5d9e51b68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "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] fd552c8db221734be9e97eead1f61b9f9e5d143931255361e95cd7e32b8627d1
[INFO] running `Command { std: "docker" "start" "-a" "fd552c8db221734be9e97eead1f61b9f9e5d143931255361e95cd7e32b8627d1", kill_on_drop: false }`
[INFO] [stderr]  Documenting phantom-data v0.1.0 (/opt/rustwide/workdir/phantom-data)
[INFO] [stderr]    Compiling serde_repr v0.1.5
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]  Documenting attributes v0.1.0 (/opt/rustwide/workdir/attributes)
[INFO] [stderr]  Documenting implement-deserialize-for-a-custom-map-type v0.1.0 (/opt/rustwide/workdir/implement-deserialize-for-a-custom-map-type)
[INFO] [stderr]  Documenting handwritten-generic-type-bound v0.1.0 (/opt/rustwide/workdir/handwritten-generic-type-bounds)
[INFO] [stderr]  Documenting discarding-data v0.1.0 (/opt/rustwide/workdir/discarding-data)
[INFO] [stderr]  Documenting enum-representations v0.1.0 (/opt/rustwide/workdir/enum-representations)
[INFO] [stderr]  Documenting deriving-de-serialize-for-type-in-a-different-crate v0.1.0 (/opt/rustwide/workdir/deriving-de-serialize-for-type-in-a-different-crate)
[INFO] [stderr]  Documenting processing-an-array-of-values-without-buffering-into-a-vec v0.1.0 (/opt/rustwide/workdir/processing-an-array-of-values-without-buffering-into-a-vec)
[INFO] [stderr]  Documenting using-derive v0.1.0 (/opt/rustwide/workdir/using-derive)
[INFO] [stderr]  Documenting skip-serializing-field v0.1.0 (/opt/rustwide/workdir/skip-serializing-field)
[INFO] [stderr]  Documenting manually-implementing-deserialize-for-a-struct v0.1.0 (/opt/rustwide/workdir/manually-implementing-deserialize-for-a-struct)
[INFO] [stderr]  Documenting the-visitor-trait v0.1.0 (/opt/rustwide/workdir/the-visitor-trait)
[INFO] [stderr]  Documenting default-value-for-a-field v0.1.0 (/opt/rustwide/workdir/default-value-for-a-field)
[INFO] [stderr]  Documenting custom-serialization v0.1.0 (/opt/rustwide/workdir/custom-serialization)
[INFO] [stderr]  Documenting serialize-fields-as-camelcase v0.1.0 (/opt/rustwide/workdir/serialize-fields-as-camelcase)
[INFO] [stderr]  Documenting struct-flattening v0.1.0 (/opt/rustwide/workdir/struct-flattening)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> manually-implementing-deserialize-for-a-struct/src/main.rs:28:10
[INFO] [stdout]    |
[INFO] [stdout] 28 |         };
[INFO] [stdout]    |          ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `processing-an-array-of-values-without-buffering-into-a-vec`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name processing_an_array_of_values_without_buffering_into_a_vec processing-an-array-of-values-without-buffering-into-a-vec/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 serde=/opt/rustwide/target/debug/deps/libserde-3210c29e62482c4f.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-2a0bda5c60fb45fd.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "fd552c8db221734be9e97eead1f61b9f9e5d143931255361e95cd7e32b8627d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd552c8db221734be9e97eead1f61b9f9e5d143931255361e95cd7e32b8627d1", kill_on_drop: false }`
[INFO] [stdout] fd552c8db221734be9e97eead1f61b9f9e5d143931255361e95cd7e32b8627d1