[INFO] cloning repository https://github.com/marad/new-tab
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/marad/new-tab" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarad%2Fnew-tab", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarad%2Fnew-tab'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 364846a22b5ce3d389dbd4792cf6b1514dc56fb3
[INFO] documenting marad/new-tab against 1.55.0 for beta-1.56-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmarad%2Fnew-tab" "/workspace/builds/worker-42/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-42/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/marad/new-tab on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/marad/new-tab
[INFO] finished tweaking git repo https://github.com/marad/new-tab
[INFO] tweaked toml for git repo https://github.com/marad/new-tab written to /workspace/builds/worker-42/source/Cargo.toml
[INFO] crate git repo https://github.com/marad/new-tab already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--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] [stderr] Downloading crates ...
[INFO] [stderr] Downloaded tokio-current-thread v0.1.5
[INFO] [stderr] Downloaded cc v1.0.30
[INFO] [stderr] Downloaded either v1.5.1
[INFO] [stderr] Downloaded reqwest v0.9.11
[INFO] [stderr] Downloaded v_htmlescape v0.4.3
[INFO] [stderr] Downloaded enum-as-inner v0.2.1
[INFO] [stderr] Downloaded clokwerk v0.1.0
[INFO] [stderr] Downloaded syn v0.15.27
[INFO] [stderr] Downloaded arc-swap v0.3.7
[INFO] [stderr] Downloaded rand_jitter v0.1.3
[INFO] [stderr] Downloaded uuid v0.7.2
[INFO] [stderr] Downloaded unicase v2.3.0
[INFO] [stderr] Downloaded backtrace v0.3.14
[INFO] [stderr] Downloaded actix-codec v0.1.2
[INFO] [stderr] Downloaded flate2 v1.0.6
[INFO] [stderr] Downloaded miniz-sys v0.1.11
[INFO] [stderr] Downloaded v_escape_derive v0.5.3
[INFO] [stderr] Downloaded derive_more v0.14.0
[INFO] [stderr] Downloaded v_escape v0.7.2
[INFO] [stderr] Downloaded signal-hook v0.1.8
[INFO] [stderr] Downloaded actix-threadpool v0.1.0
[INFO] [stderr] Downloaded actix-web v1.0.0-alpha.3
[INFO] [stderr] Downloaded actix-server v0.4.2
[INFO] [stderr] Downloaded actix-server-config v0.1.0
[INFO] [stderr] Downloaded openssl-sys v0.9.42
[INFO] [stderr] Downloaded actix-web-codegen v0.1.0-alpha.1
[INFO] [stderr] Downloaded curl v0.4.19
[INFO] [stderr] Downloaded h2 v0.1.16
[INFO] [stderr] Downloaded tokio-threadpool v0.1.12
[INFO] [stderr] Downloaded tokio-executor v0.1.6
[INFO] [stderr] Downloaded http v0.1.16
[INFO] [stderr] Downloaded tokio v0.1.16
[INFO] [stderr] Downloaded ipconfig v0.1.9
[INFO] [stderr] Downloaded hyper v0.12.25
[INFO] [stderr] Downloaded openssl v0.10.19
[INFO] [stderr] Downloaded tempfile v3.0.7
[INFO] [stderr] Downloaded actix-rt v0.2.2
[INFO] [stderr] Downloaded tokio-sync v0.1.3
[INFO] [stderr] Downloaded libc v0.2.49
[INFO] [stderr] Downloaded libflate v0.1.21
[INFO] [stderr] Downloaded tokio-signal v0.2.7
[INFO] [stderr] Downloaded trust-dns-proto v0.7.1
[INFO] [stderr] Downloaded curl-sys v0.4.16
[INFO] [stderr] Downloaded actix-service v0.3.5
[INFO] [stderr] Downloaded actix-utils v0.3.4
[INFO] [stderr] Downloaded actix-files v0.1.0-alpha.2
[INFO] [stderr] Downloaded actix-router v0.1.0
[INFO] [stderr] Downloaded oauth2_noserver v0.1.2
[INFO] [stderr] Downloaded actix-connect v0.1.1
[INFO] [stderr] Downloaded webbrowser v0.4.0
[INFO] [stderr] Downloaded trust-dns-resolver v0.11.0-alpha.2
[INFO] [stderr] Downloaded actix-http v0.1.0-alpha.3
[INFO] [stderr] Downloaded oauth2 v1.3.0
[INFO] [stderr] Downloaded awc v0.1.0-alpha.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0cb762d6666fa9b5f0d67c885d83c20cf1cbce41289e1ea21a1a49377eec2fcb
[INFO] running `Command { std: "docker" "start" "-a" "0cb762d6666fa9b5f0d67c885d83c20cf1cbce41289e1ea21a1a49377eec2fcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0cb762d6666fa9b5f0d67c885d83c20cf1cbce41289e1ea21a1a49377eec2fcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cb762d6666fa9b5f0d67c885d83c20cf1cbce41289e1ea21a1a49377eec2fcb", kill_on_drop: false }`
[INFO] [stdout] 0cb762d6666fa9b5f0d67c885d83c20cf1cbce41289e1ea21a1a49377eec2fcb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 469d7a40ff1270777e484105fcb994e28e6c46ce52c64005f46dd727f6a0883a
[INFO] running `Command { std: "docker" "start" "-a" "469d7a40ff1270777e484105fcb994e28e6c46ce52c64005f46dd727f6a0883a", kill_on_drop: false }`
[INFO] [stderr] Blocking waiting for file lock on package cache
[INFO] [stderr] Compiling libc v0.2.49
[INFO] [stderr] Compiling cc v1.0.30
[INFO] [stderr] Checking lazy_static v1.3.0
[INFO] [stderr] Checking rand_core v0.4.0
[INFO] [stderr] Checking futures v0.1.25
[INFO] [stderr] Checking smallvec v0.6.9
[INFO] [stderr] Checking lazycell v1.2.1
[INFO] [stderr] Compiling memchr v2.2.0
[INFO] [stderr] Compiling arrayvec v0.4.10
[INFO] [stderr] Compiling serde v1.0.89
[INFO] [stderr] Checking nodrop v0.1.13
[INFO] [stderr] Compiling failure_derive v0.1.5
[INFO] [stderr] Checking string v0.1.3
[INFO] [stderr] Compiling httparse v1.3.3
[INFO] [stderr] Checking indexmap v1.0.2
[INFO] [stderr] Compiling regex v1.1.2
[INFO] [stderr] Checking ucd-util v0.1.3
[INFO] [stderr] Checking either v1.5.1
[INFO] [stderr] Checking utf8-ranges v1.0.2
[INFO] [stderr] Compiling openssl v0.10.19
[INFO] [stderr] Checking spin v0.5.0
[INFO] [stderr] Compiling num-traits v0.2.6
[INFO] [stderr] Checking untrusted v0.6.2
[INFO] [stderr] Checking arc-swap v0.3.7
[INFO] [stderr] Checking try-lock v0.2.2
[INFO] [stderr] Compiling native-tls v0.2.2
[INFO] [stderr] Checking version_check v0.1.5
[INFO] [stderr] Compiling encoding_rs v0.8.17
[INFO] [stderr] Compiling rayon v1.0.3
[INFO] [stderr] Checking adler32 v1.0.3
[INFO] [stderr] Checking webbrowser v0.4.0
[INFO] [stderr] Compiling rand_chacha v0.1.1
[INFO] [stderr] Compiling rand_pcg v0.1.2
[INFO] [stderr] Compiling rand v0.6.5
[INFO] [stderr] Checking owning_ref v0.4.0
[INFO] [stderr] Compiling backtrace v0.3.14
[INFO] [stderr] Compiling unicase v2.3.0
[INFO] [stderr] Compiling nom v4.2.3
[INFO] [stderr] Compiling v_escape v0.7.2
[INFO] [stderr] Checking crossbeam-utils v0.2.2
[INFO] [stderr] Checking crc32fast v1.2.0
[INFO] [stderr] Compiling parking_lot_core v0.4.0
[INFO] [stderr] Checking base64 v0.10.1
[INFO] [stderr] Checking hashbrown v0.1.8
[INFO] [stderr] Compiling syn v0.15.27
[INFO] [stderr] Compiling phf_shared v0.7.24
[INFO] [stderr] Checking crossbeam-utils v0.6.5
[INFO] [stderr] Checking lock_api v0.1.5
[INFO] [stderr] Checking thread_local v0.3.6
[INFO] [stderr] Checking regex-syntax v0.6.5
[INFO] [stderr] Compiling rand_core v0.3.1
[INFO] [stderr] Compiling rand_jitter v0.1.3
[INFO] [stderr] Compiling rand_isaac v0.1.1
[INFO] [stderr] Compiling rand_xorshift v0.1.1
[INFO] [stderr] Compiling rand_hc v0.1.0
[INFO] [stderr] Checking crossbeam-queue v0.1.2
[INFO] [stderr] Checking unicode-normalization v0.1.8
[INFO] [stderr] Checking iovec v0.1.2
[INFO] [stderr] Checking rand_os v0.1.3
[INFO] [stderr] Checking num_cpus v1.10.0
[INFO] [stderr] Checking net2 v0.2.33
[INFO] [stderr] Checking socket2 v0.3.8
[INFO] [stderr] Checking time v0.1.42
[INFO] [stderr] Checking hostname v0.1.5
[INFO] [stderr] Checking signal-hook v0.1.8
[INFO] [stderr] Checking phf v0.7.24
[INFO] [stderr] Checking libflate v0.1.21
[INFO] [stderr] Checking tokio-executor v0.1.6
[INFO] [stderr] Checking tokio-sync v0.1.3
[INFO] [stderr] Checking actix-service v0.3.5
[INFO] [stderr] Checking actix-server-config v0.1.0
[INFO] [stderr] Checking want v0.0.6
[INFO] [stderr] Compiling openssl-sys v0.9.42
[INFO] [stderr] Compiling backtrace-sys v0.1.28
[INFO] [stderr] Compiling brotli-sys v0.3.2
[INFO] [stderr] Compiling miniz-sys v0.1.11
[INFO] [stderr] Compiling libz-sys v1.0.25
[INFO] [stderr] Compiling ring v0.14.6
[INFO] [stderr] Compiling curl-sys v0.4.16
[INFO] [stderr] error: could not compile `syn`
[INFO] [stderr]
[INFO] [stderr] Caused by:
[INFO] [stderr] process didn't exit successfully: `rustc --crate-name syn /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.15.27/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=e647bf57c6092118 -C extra-filename=-e647bf57c6092118 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-baee35fcf6990606.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-7fede1f35392dd7a.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-2f6444d33d391550.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" "469d7a40ff1270777e484105fcb994e28e6c46ce52c64005f46dd727f6a0883a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "469d7a40ff1270777e484105fcb994e28e6c46ce52c64005f46dd727f6a0883a", kill_on_drop: false }`
[INFO] [stdout] 469d7a40ff1270777e484105fcb994e28e6c46ce52c64005f46dd727f6a0883a