[INFO] fetching crate cobalt-bin 0.16.3...
[INFO] documenting cobalt-bin-0.16.3 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate cobalt-bin 0.16.3 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate cobalt-bin 0.16.3 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "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-7/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" "+1.47.0" "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 assert_fs v1.0.0
[INFO] [stderr]   Downloaded sass-rs v0.2.2
[INFO] [stderr]   Downloaded chrono_utils v0.1.3
[INFO] [stderr]   Downloaded liquid v0.21.1
[INFO] [stderr]   Downloaded rss v1.9.0
[INFO] [stderr]   Downloaded liquid-core v0.21.1
[INFO] [stderr]   Downloaded sass-sys v0.4.21
[INFO] [stderr]   Downloaded deunicode v1.1.1
[INFO] [stderr]   Downloaded syntect v4.3.0
[INFO] [stderr]   Downloaded ghp v0.1.2
[INFO] [stderr]   Downloaded jsonfeed v0.2.0
[INFO] [stderr]   Downloaded sitemap v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f112948f37fddbbb36a726386251f89495f9c9f13f6c1a3e60d99a4c4ce3fa5e
[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" "f112948f37fddbbb36a726386251f89495f9c9f13f6c1a3e60d99a4c4ce3fa5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f112948f37fddbbb36a726386251f89495f9c9f13f6c1a3e60d99a4c4ce3fa5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f112948f37fddbbb36a726386251f89495f9c9f13f6c1a3e60d99a4c4ce3fa5e", kill_on_drop: false }`
[INFO] [stdout] f112948f37fddbbb36a726386251f89495f9c9f13f6c1a3e60d99a4c4ce3fa5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.47.0" "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] a721cb96cc51f365ca91c2d453b0f4c9e4bdfd338c03975aa437213f9cf9e1ea
[INFO] running `Command { std: "docker" "start" "-a" "a721cb96cc51f365ca91c2d453b0f4c9e4bdfd338c03975aa437213f9cf9e1ea", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.36
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling derive_builder v0.9.0
[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 line-wrap v0.1.1
[INFO] [stderr]     Checking yaml-rust v0.4.4
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking filetime v0.2.12
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]     Checking quick-xml v0.17.2
[INFO] [stderr]     Checking flate2 v1.0.16
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]    Compiling proc-quote-impl v0.3.2
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]     Checking pest v2.1.3
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]     Checking walkdir v0.1.8
[INFO] [stderr]     Checking fancy-regex v0.3.5
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking ghp v0.1.2
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking chrono v0.4.13
[INFO] [stderr]     Checking globset v0.4.5
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking ignore v0.4.16
[INFO] [stderr]    Compiling sass-sys v0.4.21
[INFO] [stderr]    Compiling pest_meta v2.1.3
[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]     Checking sitemap v0.4.0
[INFO] [stderr] error: could not compile `syn`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-1.0.36/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=591d39bf7dd677f4 -C extra-filename=-591d39bf7dd677f4 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-c893c47f7fec5f12.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-05588c6760812b69.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-8a058fa190690d36.rmeta --cap-lints allow --cfg syn_disable_nightly_tests` (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" "a721cb96cc51f365ca91c2d453b0f4c9e4bdfd338c03975aa437213f9cf9e1ea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a721cb96cc51f365ca91c2d453b0f4c9e4bdfd338c03975aa437213f9cf9e1ea", kill_on_drop: false }`
[INFO] [stdout] a721cb96cc51f365ca91c2d453b0f4c9e4bdfd338c03975aa437213f9cf9e1ea
