[INFO] fetching crate lucetc 0.6.1...
[INFO] documenting lucetc-0.6.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate lucetc 0.6.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate lucetc 0.6.1 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 lucetc 0.6.1
[INFO] finished tweaking crates.io crate lucetc 0.6.1
[INFO] tweaked toml for crates.io crate lucetc 0.6.1 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate lucetc 0.6.1 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 wabt v0.9.2
[INFO] [stderr]   Downloaded wast v3.0.4
[INFO] [stderr]   Downloaded human-size v0.4.0
[INFO] [stderr]   Downloaded wabt-sys v0.7.0
[INFO] [stderr]   Downloaded faerie v0.12.0
[INFO] [stderr]   Downloaded witx v0.6.0
[INFO] [stderr]   Downloaded bimap v0.2.0
[INFO] [stderr]   Downloaded cranelift-native v0.51.0
[INFO] [stderr]   Downloaded cranelift-frontend v0.51.0
[INFO] [stderr]   Downloaded cranelift-bforest v0.51.0
[INFO] [stderr]   Downloaded lucet-validate v0.6.1
[INFO] [stderr]   Downloaded cranelift-wasm v0.51.0
[INFO] [stderr]   Downloaded wasmonkey v0.1.9
[INFO] [stderr]   Downloaded wasmparser v0.39.3
[INFO] [stderr]   Downloaded cranelift-entity v0.51.0
[INFO] [stderr]   Downloaded cranelift-codegen-meta v0.51.0
[INFO] [stderr]   Downloaded cranelift-codegen v0.51.0
[INFO] [stderr]   Downloaded cranelift-codegen-shared v0.51.0
[INFO] [stderr]   Downloaded cranelift-faerie v0.51.0
[INFO] [stderr]   Downloaded cranelift-module v0.51.0
[INFO] [stderr]   Downloaded lucet-module v0.6.1
[INFO] [stderr]   Downloaded xfailure v0.1.0
[INFO] [stderr]   Downloaded minisign v0.5.14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 93ecea25556ed978521c273763a008aee5ea967cf3e2c66aed5dd1b0db4de51c
[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" "93ecea25556ed978521c273763a008aee5ea967cf3e2c66aed5dd1b0db4de51c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "93ecea25556ed978521c273763a008aee5ea967cf3e2c66aed5dd1b0db4de51c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93ecea25556ed978521c273763a008aee5ea967cf3e2c66aed5dd1b0db4de51c", kill_on_drop: false }`
[INFO] [stdout] 93ecea25556ed978521c273763a008aee5ea967cf3e2c66aed5dd1b0db4de51c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] bbb3c70e7b1806bdf5787384f7a59003f0eb8c03b10982b86c1c1ffe6ba13397
[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" "bbb3c70e7b1806bdf5787384f7a59003f0eb8c03b10982b86c1c1ffe6ba13397", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling packed_struct v0.3.0
[INFO] [stderr]     Checking cranelift-entity v0.51.0
[INFO] [stderr]    Compiling target-lexicon v0.9.0
[INFO] [stderr]     Checking plain v0.2.3
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling serde-big-array v0.2.0
[INFO] [stderr]     Checking parity-wasm v0.40.3
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking wasmparser v0.39.3
[INFO] [stderr]    Compiling lucetc v0.6.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking siphasher v0.3.1
[INFO] [stderr]     Checking parity-wasm v0.41.0
[INFO] [stderr]     Checking xfailure v0.1.0
[INFO] [stderr]     Checking human-size v0.4.0
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]     Checking bimap v0.2.0
[INFO] [stderr]     Checking wast v3.0.4
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking rpassword v4.0.5
[INFO] [stderr]    Compiling scroll v0.9.2
[INFO] [stderr]    Compiling raw-cpuid v6.1.0
[INFO] [stderr]     Checking cranelift-bforest v0.51.0
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking backtrace v0.3.44
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking pbkdf2 v0.3.0
[INFO] [stderr]     Checking hmac v0.7.1
[INFO] [stderr]    Compiling scroll_derive v0.9.5
[INFO] [stderr]    Compiling derivative v1.0.3
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking sha2 v0.8.1
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]    Compiling wabt-sys v0.7.0
[INFO] [stderr]     Checking scrypt v0.2.0
[INFO] [stderr]     Checking minisign v0.5.14
[INFO] [stderr]     Checking goblin v0.0.24
[INFO] [stderr]    Compiling synstructure v0.12.3
[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-1.0.14/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="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' -C metadata=cbdc85c56f6cb703 -C extra-filename=-cbdc85c56f6cb703 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-cca29f691eaa7111.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-ff5758c045625bdf.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-00e718d0d0f7c0e6.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" "bbb3c70e7b1806bdf5787384f7a59003f0eb8c03b10982b86c1c1ffe6ba13397", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbb3c70e7b1806bdf5787384f7a59003f0eb8c03b10982b86c1c1ffe6ba13397", kill_on_drop: false }`
[INFO] [stdout] bbb3c70e7b1806bdf5787384f7a59003f0eb8c03b10982b86c1c1ffe6ba13397