[INFO] fetching crate dobot 0.1.1...
[INFO] documenting dobot-0.1.1 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate dobot 0.1.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate dobot 0.1.1 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dobot 0.1.1
[INFO] finished tweaking crates.io crate dobot 0.1.1
[INFO] tweaked toml for crates.io crate dobot 0.1.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-serial v4.3.3
[INFO] [stderr]   Downloaded mio-serial v3.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b741b5334b3780d2c7a260296f3821ca09a919561631e6f7cb7a0729b211397a
[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" "b741b5334b3780d2c7a260296f3821ca09a919561631e6f7cb7a0729b211397a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b741b5334b3780d2c7a260296f3821ca09a919561631e6f7cb7a0729b211397a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b741b5334b3780d2c7a260296f3821ca09a919561631e6f7cb7a0729b211397a", kill_on_drop: false }`
[INFO] [stdout] b741b5334b3780d2c7a260296f3821ca09a919561631e6f7cb7a0729b211397a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4f3a185261a2d6ee87b5cb77851cc21cb502d69f4700800853fe6b479f16038
[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" "f4f3a185261a2d6ee87b5cb77851cc21cb502d69f4700800853fe6b479f16038", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling getset v0.0.9
[INFO] [stderr]     Checking net2 v0.2.35
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking backtrace v0.3.53
[INFO] [stderr]     Checking libudev v0.2.0
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]     Checking serialport v3.3.0
[INFO] [stderr]     Checking mio-serial v3.3.1
[INFO] [stderr]     Checking tokio-serial v4.3.3
[INFO] [stderr]  Documenting dobot v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(fixed_size_array)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `dobot`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name dobot src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern failure=/opt/rustwide/target/debug/deps/libfailure-40eba1208ed83fc2.rmeta --extern getset=/opt/rustwide/target/debug/deps/libgetset-6ece3e27d0a9cace.so --extern tokio=/opt/rustwide/target/debug/deps/libtokio-ad609f4a5d3db725.rmeta --extern tokio_serial=/opt/rustwide/target/debug/deps/libtokio_serial-271ea107f8598426.rmeta --cap-lints=warn --crate-version 0.1.1` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "f4f3a185261a2d6ee87b5cb77851cc21cb502d69f4700800853fe6b479f16038", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4f3a185261a2d6ee87b5cb77851cc21cb502d69f4700800853fe6b479f16038", kill_on_drop: false }`
[INFO] [stdout] f4f3a185261a2d6ee87b5cb77851cc21cb502d69f4700800853fe6b479f16038
