[INFO] fetching crate amethyst_audio 0.15.3...
[INFO] documenting amethyst_audio-0.15.3 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate amethyst_audio 0.15.3 into /workspace/builds/worker-63/source
[INFO] validating manifest of crates.io crate amethyst_audio 0.15.3 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 amethyst_audio 0.15.3
[INFO] finished tweaking crates.io crate amethyst_audio 0.15.3
[INFO] tweaked toml for crates.io crate amethyst_audio 0.15.3 written to /workspace/builds/worker-63/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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] 286fb4e0b4af3ba33e30c12b4d1c9bb16b14106cee53d4984f75f212ffeca001
[INFO] running `Command { std: "docker" "start" "-a" "286fb4e0b4af3ba33e30c12b4d1c9bb16b14106cee53d4984f75f212ffeca001", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "286fb4e0b4af3ba33e30c12b4d1c9bb16b14106cee53d4984f75f212ffeca001", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "286fb4e0b4af3ba33e30c12b4d1c9bb16b14106cee53d4984f75f212ffeca001", kill_on_drop: false }`
[INFO] [stdout] 286fb4e0b4af3ba33e30c12b4d1c9bb16b14106cee53d4984f75f212ffeca001
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-63/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] c72ce28f231b9488559c2408af141035154ef1384e81f1238f2393c24366c258
[INFO] running `Command { std: "docker" "start" "-a" "c72ce28f231b9488559c2408af141035154ef1384e81f1238f2393c24366c258", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling rustversion v1.0.5
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking atom v0.3.6
[INFO] [stderr]     Checking gimli v0.25.0
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking mopa v0.2.2
[INFO] [stderr]     Checking shrev v1.1.1
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking rustc-demangle v0.1.20
[INFO] [stderr]     Checking tuple_utils v0.3.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling edit-distance v2.1.0
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling inventory v0.1.10
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]     Checking mint v0.5.6
[INFO] [stderr]    Compiling erased-serde v0.3.16
[INFO] [stderr]    Compiling cpal v0.11.0
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking hound v3.4.0
[INFO] [stderr]     Checking claxon v0.4.3
[INFO] [stderr]     Checking objekt v0.1.2
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking generic-array v0.13.3
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking tinyvec v1.3.1
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking matrixmultiply v0.2.4
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[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,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=8503bb878641932c -C extra-filename=-8503bb878641932c --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-4ad853a01b52ac03.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-8388bbcd500a3679.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-521ae656dc054791.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" "c72ce28f231b9488559c2408af141035154ef1384e81f1238f2393c24366c258", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c72ce28f231b9488559c2408af141035154ef1384e81f1238f2393c24366c258", kill_on_drop: false }`
[INFO] [stdout] c72ce28f231b9488559c2408af141035154ef1384e81f1238f2393c24366c258
