[INFO] cloning repository https://github.com/michalseweryn/didactic-guide
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michalseweryn/didactic-guide" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichalseweryn%2Fdidactic-guide", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichalseweryn%2Fdidactic-guide'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bb052bd871c41f6bd7de2e0312576fe84193daf9
[INFO] documenting michalseweryn/didactic-guide 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%2Fmichalseweryn%2Fdidactic-guide" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/michalseweryn/didactic-guide 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/michalseweryn/didactic-guide
[INFO] finished tweaking git repo https://github.com/michalseweryn/didactic-guide
[INFO] tweaked toml for git repo https://github.com/michalseweryn/didactic-guide written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/michalseweryn/didactic-guide 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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 823c161ad060ecd9c6c2d1d1a80216f947f0354f21e804b93149da9ed07a53cd
[INFO] running `Command { std: "docker" "start" "-a" "823c161ad060ecd9c6c2d1d1a80216f947f0354f21e804b93149da9ed07a53cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "823c161ad060ecd9c6c2d1d1a80216f947f0354f21e804b93149da9ed07a53cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "823c161ad060ecd9c6c2d1d1a80216f947f0354f21e804b93149da9ed07a53cd", kill_on_drop: false }`
[INFO] [stdout] 823c161ad060ecd9c6c2d1d1a80216f947f0354f21e804b93149da9ed07a53cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] c600384bc249dd6cb9f9589505fc426b6196fa4b4b970e0941ab6d54ab40b2c6
[INFO] running `Command { std: "docker" "start" "-a" "c600384bc249dd6cb9f9589505fc426b6196fa4b4b970e0941ab6d54ab40b2c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking sp-std v3.0.0 (https://github.com/paritytech/substrate.git?tag=monthly-2021-07#83808aa8)
[INFO] [stderr]    Compiling wasm-bindgen v0.2.74
[INFO] [stderr]    Compiling target-lexicon v0.12.0
[INFO] [stderr]     Checking wasmparser v0.78.2
[INFO] [stderr]    Compiling wasmtime-cache v0.27.0
[INFO] [stderr]    Compiling sc-consensus-slots v0.9.0 (https://github.com/paritytech/substrate.git?tag=monthly-2021-07#83808aa8)
[INFO] [stderr]    Compiling winapi v0.3.9
[INFO] [stderr]    Compiling bindgen v0.57.0
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]     Checking blake2b_simd v0.5.11
[INFO] [stderr]     Checking blake2s_simd v0.5.11
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]    Compiling cpp_demangle v0.3.2
[INFO] [stderr]     Checking wast v36.0.0
[INFO] [stderr]    Compiling anyhow v1.0.41
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]    Compiling substrate-build-script-utils v3.0.0 (https://github.com/paritytech/substrate.git?tag=monthly-2021-07#83808aa8)
[INFO] [stderr]     Checking crypto-mac v0.8.0
[INFO] [stderr]     Checking universal-hash v0.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling impl-trait-for-tuples v0.2.1
[INFO] [stderr]    Compiling sp-debug-derive v3.0.0 (https://github.com/paritytech/substrate.git?tag=monthly-2021-07#83808aa8)
[INFO] [stderr]    Compiling ref-cast-impl v1.0.6
[INFO] [stderr]    Compiling dyn-clonable-impl v0.9.0
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]    Compiling derive_more v0.99.14
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling pin-project-internal v0.4.28
[INFO] [stderr]    Compiling enum-as-inner v0.3.3
[INFO] [stderr]    Compiling minicbor-derive v0.6.3
[INFO] [stderr]    Compiling libp2p-swarm-derive v0.23.0
[INFO] [stderr]    Compiling scroll_derive v0.10.5
[INFO] [stderr]    Compiling frame-support-procedural-tools-derive v3.0.0 (https://github.com/paritytech/substrate.git?tag=monthly-2021-07#83808aa8)
[INFO] [stderr]    Compiling data-encoding-macro-internal v0.1.10
[INFO] [stderr]    Compiling nalgebra-macros v0.1.0
[INFO] [stderr]    Compiling strum_macros v0.20.1
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr] error: could not compile `serde_derive`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name serde_derive /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_derive-1.0.126/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' -C metadata=0cc5df29a8dfe6d0 -C extra-filename=-0cc5df29a8dfe6d0 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-68a3eb89bd75b2df.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-127711d739e80e49.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-544c504b6453dba3.rlib --extern proc_macro --cap-lints allow --cfg underscore_consts` (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" "c600384bc249dd6cb9f9589505fc426b6196fa4b4b970e0941ab6d54ab40b2c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c600384bc249dd6cb9f9589505fc426b6196fa4b4b970e0941ab6d54ab40b2c6", kill_on_drop: false }`
[INFO] [stdout] c600384bc249dd6cb9f9589505fc426b6196fa4b4b970e0941ab6d54ab40b2c6
