[INFO] fetching crate ncspot 0.8.1...
[INFO] documenting ncspot-0.8.1 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate ncspot 0.8.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate ncspot 0.8.1 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 crates.io crate ncspot 0.8.1
[INFO] finished tweaking crates.io crate ncspot 0.8.1
[INFO] tweaked toml for crates.io crate ncspot 0.8.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate ncspot 0.8.1 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] [stdout] 9986c5970e0a5c9560c85365661579e30533068a386f8ac17617e09edf8fe865
[INFO] running `Command { std: "docker" "start" "-a" "9986c5970e0a5c9560c85365661579e30533068a386f8ac17617e09edf8fe865", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9986c5970e0a5c9560c85365661579e30533068a386f8ac17617e09edf8fe865", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9986c5970e0a5c9560c85365661579e30533068a386f8ac17617e09edf8fe865", kill_on_drop: false }`
[INFO] [stdout] 9986c5970e0a5c9560c85365661579e30533068a386f8ac17617e09edf8fe865
[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] [stdout] 9905cf6b0f06176dc934ad1bcf8ed3c9b53cb00c849cae8da9415e4fbe1b1fa4
[INFO] running `Command { std: "docker" "start" "-a" "9905cf6b0f06176dc934ad1bcf8ed3c9b53cb00c849cae8da9415e4fbe1b1fa4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling protobuf v2.14.0
[INFO] [stderr]    Compiling semver v1.0.3
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]    Compiling signal-hook v0.3.9
[INFO] [stderr]     Checking array-macro v1.0.5
[INFO] [stderr]    Compiling derive_builder v0.7.2
[INFO] [stderr]     Checking shell-words v1.0.0
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking webbrowser v0.5.5
[INFO] [stderr]     Checking random v0.12.2
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling tokio v1.9.0
[INFO] [stderr]    Compiling libpulse-sys v1.18.0
[INFO] [stderr]    Compiling num-bigint v0.4.0
[INFO] [stderr]    Compiling priority-queue v1.1.1
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking shannon v0.2.0
[INFO] [stderr]    Compiling libdbus-sys v0.2.1
[INFO] [stderr]    Compiling libpulse-simple-sys v1.16.1
[INFO] [stderr]    Compiling ncurses v5.101.0
[INFO] [stderr]    Compiling ahash v0.6.3
[INFO] [stderr]     Checking ogg v0.8.0
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking headers-core v0.2.0
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking fern v0.6.0
[INFO] [stderr]     Checking futures-channel v0.3.16
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking syn v1.0.74
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]    Compiling enumflags2_derive v0.6.4
[INFO] [stderr]    Compiling enum-map-derive v0.4.6
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]    Compiling serde_repr v0.1.7
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling strum_macros v0.21.1
[INFO] [stderr]     Checking sha-1 v0.9.7
[INFO] [stderr]     Checking hmac v0.11.0
[INFO] [stderr]    Compiling zerocopy-derive v0.2.0
[INFO] [stderr]     Checking lewton v0.10.2
[INFO] [stderr]     Checking aes v0.6.0
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking pbkdf2 v0.8.0
[INFO] [stderr]     Checking num-rational v0.3.2
[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-1.0.74/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata -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"' --cfg 'feature="visit-mut"' -C metadata=2e608cb57dbf2ff3 -C extra-filename=-2e608cb57dbf2ff3 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-664abb91e2bdc317.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-dc7cbb122f009b6c.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-56baa69851702f2b.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" "9905cf6b0f06176dc934ad1bcf8ed3c9b53cb00c849cae8da9415e4fbe1b1fa4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9905cf6b0f06176dc934ad1bcf8ed3c9b53cb00c849cae8da9415e4fbe1b1fa4", kill_on_drop: false }`
[INFO] [stdout] 9905cf6b0f06176dc934ad1bcf8ed3c9b53cb00c849cae8da9415e4fbe1b1fa4
