[INFO] fetching crate arendur 0.0.5...
[INFO] documenting arendur-0.0.5 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate arendur 0.0.5 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate arendur 0.0.5 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 arendur 0.0.5
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate arendur 0.0.5
[INFO] tweaked toml for crates.io crate arendur 0.0.5 written to /workspace/builds/worker-3/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 copy_arena v0.1.1
[INFO] [stderr]   Downloaded aren_alloc v0.2.1
[INFO] [stderr]   Downloaded flame v0.1.12
[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" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9922b734b26a1d96c01043e7111234d7b23961bd2a413c7c2b62a21dfce6dabc
[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" "9922b734b26a1d96c01043e7111234d7b23961bd2a413c7c2b62a21dfce6dabc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9922b734b26a1d96c01043e7111234d7b23961bd2a413c7c2b62a21dfce6dabc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9922b734b26a1d96c01043e7111234d7b23961bd2a413c7c2b62a21dfce6dabc", kill_on_drop: false }`
[INFO] [stdout] 9922b734b26a1d96c01043e7111234d7b23961bd2a413c7c2b62a21dfce6dabc
[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" "+beta-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39e72684c5732f5b4c72e83e86536ba0187bf3ec4b41a2f8dca1822a51863ef7
[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" "39e72684c5732f5b4c72e83e86536ba0187bf3ec4b41a2f8dca1822a51863ef7", kill_on_drop: false }`
[INFO] [stderr]     Checking inflate v0.1.1
[INFO] [stderr]     Checking approx v0.1.1
[INFO] [stderr]     Checking copy_arena v0.1.1
[INFO] [stderr]     Checking aren_alloc v0.2.1
[INFO] [stderr]     Checking tobj v0.1.12
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]     Checking gif v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking enum_primitive v0.1.1
[INFO] [stderr]     Checking rayon v0.7.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/aren_alloc-0.2.1/src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | #![feature(coerce_unsized)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/aren_alloc-0.2.1/src/lib.rs:32:1
[INFO] [stdout]    |
[INFO] [stdout] 32 | #![feature(unsize)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^
[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 compile `aren_alloc`
[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" "39e72684c5732f5b4c72e83e86536ba0187bf3ec4b41a2f8dca1822a51863ef7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39e72684c5732f5b4c72e83e86536ba0187bf3ec4b41a2f8dca1822a51863ef7", kill_on_drop: false }`
[INFO] [stdout] 39e72684c5732f5b4c72e83e86536ba0187bf3ec4b41a2f8dca1822a51863ef7
