[INFO] fetching crate unbase 0.0.2...
[INFO] documenting unbase-0.0.2 against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] extracting crate unbase 0.0.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate unbase 0.0.2 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 unbase 0.0.2
[INFO] finished tweaking crates.io crate unbase 0.0.2
[INFO] tweaked toml for crates.io crate unbase 0.0.2 written to /workspace/builds/worker-0/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 byte-tools v0.1.3
[INFO] [stderr]   Downloaded futures-await-async-macro v0.1.4
[INFO] [stderr]   Downloaded futures-await v0.1.1
[INFO] [stderr]   Downloaded futures-await-await-macro v0.1.1
[INFO] [stderr]   Downloaded sha2 v0.4.2
[INFO] [stderr]   Downloaded digest-buffer v0.2.0
[INFO] [stderr]   Downloaded digest v0.4.0
[INFO] [stderr]   Downloaded generic-array v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] bfd5a94696b972ae1695dfdf94cfae4fe8d21b612bfa12edaee975bbaff18b13
[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" "bfd5a94696b972ae1695dfdf94cfae4fe8d21b612bfa12edaee975bbaff18b13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bfd5a94696b972ae1695dfdf94cfae4fe8d21b612bfa12edaee975bbaff18b13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfd5a94696b972ae1695dfdf94cfae4fe8d21b612bfa12edaee975bbaff18b13", kill_on_drop: false }`
[INFO] [stdout] bfd5a94696b972ae1695dfdf94cfae4fe8d21b612bfa12edaee975bbaff18b13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 662a133471a44f4247c450820cd09e993cc6757459318750dfd0ae85ceceb07f
[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" "662a133471a44f4247c450820cd09e993cc6757459318750dfd0ae85ceceb07f", kill_on_drop: false }`
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]     Checking itertools v0.5.10
[INFO] [stderr]    Compiling futures-await-async-macro v0.1.4
[INFO] [stderr]     Checking sha2 v0.4.2
[INFO] [stderr]     Checking serde_json v0.9.10
[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/futures-await-async-macro-0.1.4/src/lib.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![feature(proc_macro)]
[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 `futures-await-async-macro`
[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" "662a133471a44f4247c450820cd09e993cc6757459318750dfd0ae85ceceb07f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "662a133471a44f4247c450820cd09e993cc6757459318750dfd0ae85ceceb07f", kill_on_drop: false }`
[INFO] [stdout] 662a133471a44f4247c450820cd09e993cc6757459318750dfd0ae85ceceb07f
