[INFO] cloning repository https://github.com/DrunkenInfant/rpi-moisture-sensor
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DrunkenInfant/rpi-moisture-sensor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDrunkenInfant%2Frpi-moisture-sensor"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDrunkenInfant%2Frpi-moisture-sensor'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ba2b2037b0e1a76a2da562b5b3848007c55ef168
[INFO] testing DrunkenInfant/rpi-moisture-sensor against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDrunkenInfant%2Frpi-moisture-sensor" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/DrunkenInfant/rpi-moisture-sensor on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/DrunkenInfant/rpi-moisture-sensor
[INFO] finished tweaking git repo https://github.com/DrunkenInfant/rpi-moisture-sensor
[INFO] tweaked toml for git repo https://github.com/DrunkenInfant/rpi-moisture-sensor written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/DrunkenInfant/rpi-moisture-sensor already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tock-registers v0.3.0
[INFO] [stderr]   Downloaded register v0.3.2
[INFO] [stderr]   Downloaded amq-protocol-types v1.0.0
[INFO] [stderr]   Downloaded amq-protocol-codegen v1.0.1
[INFO] [stderr]   Downloaded sasl v0.4.2
[INFO] [stderr]   Downloaded amq-protocol v1.0.0
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 311cdbaf58b50f6c270f7c31ce5c9c805a79e8aa9cca473717d9ac658af48f82
[INFO] running `"docker" "start" "-a" "311cdbaf58b50f6c270f7c31ce5c9c805a79e8aa9cca473717d9ac658af48f82"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling rand_core v0.3.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling futures v0.1.25
[INFO] [stderr]    Compiling byteorder v1.2.7
[INFO] [stderr]    Compiling serde v1.0.84
[INFO] [stderr]    Compiling ucd-trie v0.1.1
[INFO] [stderr]    Compiling maplit v1.0.1
[INFO] [stderr]    Compiling slab v0.4.1
[INFO] [stderr]    Compiling cookie-factory v0.2.4
[INFO] [stderr]    Compiling cc v1.0.28
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]    Compiling autocfg v0.1.1
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling rustc-demangle v0.1.13
[INFO] [stderr]    Compiling arc-swap v0.3.7
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling tock-registers v0.3.0
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/tock-registers-0.3.0/src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `tock-registers`.
[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 `"docker" "inspect" "311cdbaf58b50f6c270f7c31ce5c9c805a79e8aa9cca473717d9ac658af48f82"`
[INFO] running `"docker" "rm" "-f" "311cdbaf58b50f6c270f7c31ce5c9c805a79e8aa9cca473717d9ac658af48f82"`
[INFO] [stdout] 311cdbaf58b50f6c270f7c31ce5c9c805a79e8aa9cca473717d9ac658af48f82