[INFO] fetching crate cobalt-bin 0.16.3...
[INFO] documenting cobalt-bin-0.16.3 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate cobalt-bin 0.16.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate cobalt-bin 0.16.3 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 cobalt-bin 0.16.3
[INFO] finished tweaking crates.io crate cobalt-bin 0.16.3
[INFO] tweaked toml for crates.io crate cobalt-bin 0.16.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate cobalt-bin 0.16.3 already has a lockfile, it will not be regenerated
[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 liquid-derive v0.21.0
[INFO] [stderr]   Downloaded syntect v4.3.0
[INFO] [stderr]   Downloaded deunicode v1.1.1
[INFO] [stderr]   Downloaded liquid v0.21.1
[INFO] [stderr]   Downloaded liquid-core v0.21.1
[INFO] [stderr]   Downloaded liquid-lib v0.21.1
[INFO] [stderr]   Downloaded rss v1.9.0
[INFO] [stderr]   Downloaded fancy-regex v0.3.5
[INFO] [stderr]   Downloaded tiny_http v0.7.0
[INFO] [stderr]   Downloaded kstring v1.0.0
[INFO] [stderr]   Downloaded jsonfeed v0.2.0
[INFO] [stderr]   Downloaded ghp v0.1.2
[INFO] [stderr]   Downloaded sass-rs v0.2.2
[INFO] [stderr]   Downloaded sass-sys v0.4.21
[INFO] [stderr]   Downloaded sitemap v0.4.0
[INFO] [stderr]   Downloaded chrono_utils v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 0e0a699754be6076bf7d2abef012c921655324b3ea061c616e9be52f400a28a2
[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" "0e0a699754be6076bf7d2abef012c921655324b3ea061c616e9be52f400a28a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0e0a699754be6076bf7d2abef012c921655324b3ea061c616e9be52f400a28a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e0a699754be6076bf7d2abef012c921655324b3ea061c616e9be52f400a28a2", kill_on_drop: false }`
[INFO] [stdout] 0e0a699754be6076bf7d2abef012c921655324b3ea061c616e9be52f400a28a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] a20990c3afb09b19de46f769776afcb5cf4af4b1d8b87826b2f264b9920758f7
[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" "a20990c3afb09b19de46f769776afcb5cf4af4b1d8b87826b2f264b9920758f7", 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling derive_builder v0.9.0
[INFO] [stderr]     Checking anymap v0.12.1
[INFO] [stderr]    Compiling pulldown-cmark v0.7.2
[INFO] [stderr]     Checking deunicode v1.1.1
[INFO] [stderr]     Checking chunked_transfer v1.2.0
[INFO] [stderr]     Checking ascii v1.0.0
[INFO] [stderr]     Checking open v1.4.0
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]     Checking line-wrap v0.1.1
[INFO] [stderr]     Checking encoding_rs v0.8.23
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking filetime v0.2.12
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]     Checking flate2 v1.0.16
[INFO] [stderr]    Compiling proc-quote-impl v0.3.2
[INFO] [stderr]     Checking pest v2.1.3
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]     Checking walkdir v0.1.8
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]     Checking fancy-regex v0.3.5
[INFO] [stderr]     Checking globset v0.4.5
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking ghp v0.1.2
[INFO] [stderr]     Checking ignore v0.4.16
[INFO] [stderr]     Checking chrono v0.4.13
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling sass-sys v0.4.21
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking notify v4.0.15
[INFO] [stderr]     Checking chrono_utils v0.1.3
[INFO] [stderr]     Checking tiny_http v0.7.0
[INFO] [stderr]    Compiling proc-quote v0.3.2
[INFO] [stderr]     Checking sitemap v0.4.0
[INFO] [stderr]    Compiling liquid-derive v0.21.0
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]     Checking quick-xml v0.17.2
[INFO] [stderr] error: could not compile `darling_core`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name darling_core /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/darling_core-0.10.2/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -Cembed-bitcode=no -C debuginfo=2 --cfg 'feature="strsim"' --cfg 'feature="suggestions"' -C metadata=7ae53b90a9040f34 -C extra-filename=-7ae53b90a9040f34 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern fnv=/opt/rustwide/target/debug/deps/libfnv-c2227cfbdd7b9572.rmeta --extern ident_case=/opt/rustwide/target/debug/deps/libident_case-f044afbbc3ed8064.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-71c5aa24984e0547.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-86659819dd43cd20.rmeta --extern strsim=/opt/rustwide/target/debug/deps/libstrsim-bc70c22d5dd4f0b5.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-111abb5200cffd20.rmeta --cap-lints allow` (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" "a20990c3afb09b19de46f769776afcb5cf4af4b1d8b87826b2f264b9920758f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a20990c3afb09b19de46f769776afcb5cf4af4b1d8b87826b2f264b9920758f7", kill_on_drop: false }`
[INFO] [stdout] a20990c3afb09b19de46f769776afcb5cf4af4b1d8b87826b2f264b9920758f7