[INFO] fetching crate scd30 0.3.0...
[INFO] checking scd30-0.3.0 against beta for pr-78714
[INFO] extracting crate scd30 0.3.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate scd30 0.3.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate scd30 0.3.0
[INFO] finished tweaking crates.io crate scd30 0.3.0
[INFO] tweaked toml for crates.io crate scd30 0.3.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7f3bd0756689e6e5d6d434b3e72835d37423df0c604df1d5db85e8aafc01198d
[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" "7f3bd0756689e6e5d6d434b3e72835d37423df0c604df1d5db85e8aafc01198d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f3bd0756689e6e5d6d434b3e72835d37423df0c604df1d5db85e8aafc01198d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f3bd0756689e6e5d6d434b3e72835d37423df0c604df1d5db85e8aafc01198d", kill_on_drop: false }`
[INFO] [stdout] 7f3bd0756689e6e5d6d434b3e72835d37423df0c604df1d5db85e8aafc01198d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=forbid" "-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" "check" "--frozen" "--all" "--all-targets" "--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] 1f9aebd7035a23960de03b36fac908ac2e01f0201180d480959578395c6fc80b
[INFO] running `Command { std: "docker" "start" "-a" "1f9aebd7035a23960de03b36fac908ac2e01f0201180d480959578395c6fc80b", kill_on_drop: false }`
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]    Compiling heapless v0.4.4
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking crc_all v0.1.0
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking generic-array v0.11.1
[INFO] [stderr]     Checking hash32 v0.1.1
[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/crc_all-0.1.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(reverse_bits)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking nb v0.1.3
[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 `crc_all`
[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" "1f9aebd7035a23960de03b36fac908ac2e01f0201180d480959578395c6fc80b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f9aebd7035a23960de03b36fac908ac2e01f0201180d480959578395c6fc80b", kill_on_drop: false }`
[INFO] [stdout] 1f9aebd7035a23960de03b36fac908ac2e01f0201180d480959578395c6fc80b