[INFO] cloning repository https://github.com/mbestavros/wasmtime-api-testing
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mbestavros/wasmtime-api-testing" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmbestavros%2Fwasmtime-api-testing", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmbestavros%2Fwasmtime-api-testing'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f51570e28911f18f08a4cc5dc7b4ec74a74f553c
[INFO] documenting mbestavros/wasmtime-api-testing against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmbestavros%2Fwasmtime-api-testing" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mbestavros/wasmtime-api-testing on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mbestavros/wasmtime-api-testing
[INFO] finished tweaking git repo https://github.com/mbestavros/wasmtime-api-testing
[INFO] tweaked toml for git repo https://github.com/mbestavros/wasmtime-api-testing written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/mbestavros/wasmtime-api-testing already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", 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] 4330d4f652ee4c41ed908f26d132c3bcf3c7c9e5d0cdbb31cb051b2d3a9e2107
[INFO] running `Command { std: "docker" "start" "-a" "4330d4f652ee4c41ed908f26d132c3bcf3c7c9e5d0cdbb31cb051b2d3a9e2107", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4330d4f652ee4c41ed908f26d132c3bcf3c7c9e5d0cdbb31cb051b2d3a9e2107", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4330d4f652ee4c41ed908f26d132c3bcf3c7c9e5d0cdbb31cb051b2d3a9e2107", kill_on_drop: false }`
[INFO] [stdout] 4330d4f652ee4c41ed908f26d132c3bcf3c7c9e5d0cdbb31cb051b2d3a9e2107
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+1.46.0" "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] d7fdf5a7c7496c0ffcd1794d47af96682f1f05c8fc5ea36d880e4571021edd79
[INFO] running `Command { std: "docker" "start" "-a" "d7fdf5a7c7496c0ffcd1794d47af96682f1f05c8fc5ea36d880e4571021edd79", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling rustc-demangle v0.1.15
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling regex-syntax v0.6.11
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling quick-error v1.2.2
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling termcolor v1.0.5
[INFO] [stderr]    Compiling bindgen v0.51.0
[INFO] [stderr]     Checking wasmparser v0.32.1
[INFO] [stderr]    Compiling wasmtime-environ v0.1.0 (https://github.com/CraneStation/wasmtime#8ce68732)
[INFO] [stderr]     Checking spin v0.5.0
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking wasmparser v0.35.1
[INFO] [stderr]    Compiling cmake v0.1.40
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling bincode v1.1.4
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling humantime v1.2.0
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling scroll v0.9.2
[INFO] [stderr]    Compiling raw-cpuid v6.1.0
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling wabt-sys v0.5.4
[INFO] [stderr]     Checking gimli v0.19.0
[INFO] [stderr]     Checking sha2 v0.8.0
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.31
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling clang-sys v0.28.1
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]    Compiling backtrace v0.3.34
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking errno v0.2.4
[INFO] [stderr]     Checking region v2.1.2
[INFO] [stderr]     Checking directories v2.0.2
[INFO] [stderr]    Compiling cexpr v0.3.5
[INFO] [stderr]     Checking rayon v1.1.0
[INFO] [stderr]     Checking regex v1.2.1
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr] error: could not compile `syn`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.15.42/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=a52382e6c7628f7a -C extra-filename=-a52382e6c7628f7a --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-e8a62c57741ef4cc.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-b602621ca95ec466.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-8e68d9b5a310dbdb.rmeta --cap-lints allow --cfg syn_can_match_trailing_dollar --cfg syn_can_use_thread_id --cfg syn_can_use_associated_constants --cfg syn_can_call_macro_by_path --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" "d7fdf5a7c7496c0ffcd1794d47af96682f1f05c8fc5ea36d880e4571021edd79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7fdf5a7c7496c0ffcd1794d47af96682f1f05c8fc5ea36d880e4571021edd79", kill_on_drop: false }`
[INFO] [stdout] d7fdf5a7c7496c0ffcd1794d47af96682f1f05c8fc5ea36d880e4571021edd79