[INFO] fetching crate streamson-generator 6.0.0...
[INFO] testing streamson-generator-6.0.0 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate streamson-generator 6.0.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate streamson-generator 6.0.0 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 streamson-generator 6.0.0
[INFO] finished tweaking crates.io crate streamson-generator 6.0.0
[INFO] tweaked toml for crates.io crate streamson-generator 6.0.0 written to /workspace/builds/worker-12/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 0eb01190328e43f0d28f2d25a59fcf00a464a204eb07b2b662bfe3e8578997b9
[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" "0eb01190328e43f0d28f2d25a59fcf00a464a204eb07b2b662bfe3e8578997b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0eb01190328e43f0d28f2d25a59fcf00a464a204eb07b2b662bfe3e8578997b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0eb01190328e43f0d28f2d25a59fcf00a464a204eb07b2b662bfe3e8578997b9", kill_on_drop: false }`
[INFO] [stdout] 0eb01190328e43f0d28f2d25a59fcf00a464a204eb07b2b662bfe3e8578997b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "RUSTFLAGS=--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" "build" "--frozen" "--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] 38b596993c8a5799534ff82881c7a9b99e211bde9edb9bc5ef40e93fee4cf0a7
[INFO] running `Command { std: "docker" "start" "-a" "38b596993c8a5799534ff82881c7a9b99e211bde9edb9bc5ef40e93fee4cf0a7", kill_on_drop: false }`
[INFO] [stderr]    Compiling streamson-lib v6.0.0
[INFO] [stderr]    Compiling streamson-generator v6.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(generators, generator_trait)]
[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 `streamson-generator`
[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" "38b596993c8a5799534ff82881c7a9b99e211bde9edb9bc5ef40e93fee4cf0a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38b596993c8a5799534ff82881c7a9b99e211bde9edb9bc5ef40e93fee4cf0a7", kill_on_drop: false }`
[INFO] [stdout] 38b596993c8a5799534ff82881c7a9b99e211bde9edb9bc5ef40e93fee4cf0a7
