[INFO] cloning repository https://github.com/williamsandrew/bobomb
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/williamsandrew/bobomb" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwilliamsandrew%2Fbobomb", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwilliamsandrew%2Fbobomb'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dd610d5003ec4e56720accece3eabf4757b13e8a
[INFO] documenting williamsandrew/bobomb against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwilliamsandrew%2Fbobomb" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/williamsandrew/bobomb 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 git repo https://github.com/williamsandrew/bobomb
[INFO] finished tweaking git repo https://github.com/williamsandrew/bobomb
[INFO] tweaked toml for git repo https://github.com/williamsandrew/bobomb written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/williamsandrew/bobomb 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]     Updating git repository `https://github.com/cuviper/rust-libprobe.git`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded parking_lot_core v0.2.0
[INFO] [stderr]   Downloaded futures v0.1.9
[INFO] [stderr]   Downloaded futures-cpupool v0.1.2
[INFO] [stderr]   Downloaded security-framework v0.1.10
[INFO] [stderr]   Downloaded schannel v0.1.2
[INFO] [stderr]   Downloaded security-framework-sys v0.1.10
[INFO] [stderr]   Downloaded grpc v0.1.1
[INFO] [stderr]   Downloaded httpbis v0.1.1
[INFO] [stderr]   Downloaded hpack v0.3.0
[INFO] [stderr]   Downloaded native-tls v0.1.1
[INFO] [stderr]   Downloaded num_cpus v1.2.1
[INFO] [stderr]   Downloaded parking_lot v0.3.6
[INFO] [stderr]   Downloaded owning_ref v0.2.4
[INFO] [stderr]   Downloaded tokio-tls v0.1.0
[INFO] [stderr]   Downloaded protobuf v1.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ee5216cd10f6887ca1d8c2a9e937ee820e31e398d5437c624f9adb6072a88ac4
[INFO] running `Command { std: "docker" "start" "-a" "ee5216cd10f6887ca1d8c2a9e937ee820e31e398d5437c624f9adb6072a88ac4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee5216cd10f6887ca1d8c2a9e937ee820e31e398d5437c624f9adb6072a88ac4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee5216cd10f6887ca1d8c2a9e937ee820e31e398d5437c624f9adb6072a88ac4", kill_on_drop: false }`
[INFO] [stdout] ee5216cd10f6887ca1d8c2a9e937ee820e31e398d5437c624f9adb6072a88ac4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 06237b73bdf24c85a2989d0f5e0941d5bcc6b149f8264e259b0c8d684ca27c0d
[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" "06237b73bdf24c85a2989d0f5e0941d5bcc6b149f8264e259b0c8d684ca27c0d", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.20
[INFO] [stderr]    Compiling error-chain v0.7.2
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling pkg-config v0.3.8
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]     Checking log v0.3.6
[INFO] [stderr]     Checking cfg-if v0.1.0
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]    Compiling openssl v0.9.6
[INFO] [stderr]     Checking lazy_static v0.2.2
[INFO] [stderr]     Checking lazycell v0.4.0
[INFO] [stderr]     Checking scoped-tls v0.1.0
[INFO] [stderr]     Checking crossbeam v0.2.10
[INFO] [stderr]     Checking smallvec v0.1.8
[INFO] [stderr]     Checking owning_ref v0.2.4
[INFO] [stderr]     Checking protobuf v1.1.0
[INFO] [stderr]    Compiling probe v0.1.6 (https://github.com/cuviper/rust-libprobe.git#98b71d8f)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/rust-libprobe-428800595a569dcb/98b71d8/src/lib.rs:99:1
[INFO] [stdout]    |
[INFO] [stdout] 99 | #![feature(asm)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `probe`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "06237b73bdf24c85a2989d0f5e0941d5bcc6b149f8264e259b0c8d684ca27c0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06237b73bdf24c85a2989d0f5e0941d5bcc6b149f8264e259b0c8d684ca27c0d", kill_on_drop: false }`
[INFO] [stdout] 06237b73bdf24c85a2989d0f5e0941d5bcc6b149f8264e259b0c8d684ca27c0d