[INFO] updating cached repository jacobrosenthal/balena-ble-switch
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jacobrosenthal/balena-ble-switch
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jacobrosenthal/balena-ble-switch" "work/ex/beta-1.38-1/sources/1.37.0/gh/jacobrosenthal/balena-ble-switch"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/jacobrosenthal/balena-ble-switch'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jacobrosenthal/balena-ble-switch" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jacobrosenthal/balena-ble-switch"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jacobrosenthal/balena-ble-switch'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 36b56770d95c9631d5181d7b3d14526d72def60e
[INFO] sha for GitHub repo jacobrosenthal/balena-ble-switch: 36b56770d95c9631d5181d7b3d14526d72def60e
[INFO] validating manifest of jacobrosenthal/balena-ble-switch on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jacobrosenthal/balena-ble-switch on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jacobrosenthal/balena-ble-switch
[INFO] finished frobbing jacobrosenthal/balena-ble-switch
[INFO] frobbed toml for jacobrosenthal/balena-ble-switch written to work/ex/beta-1.38-1/sources/1.37.0/gh/jacobrosenthal/balena-ble-switch/Cargo.toml
[INFO] started frobbing jacobrosenthal/balena-ble-switch
[INFO] finished frobbing jacobrosenthal/balena-ble-switch
[INFO] frobbed toml for jacobrosenthal/balena-ble-switch written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/jacobrosenthal/balena-ble-switch/Cargo.toml
[INFO] crate jacobrosenthal/balena-ble-switch already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing jacobrosenthal/balena-ble-switch against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/jacobrosenthal/balena-ble-switch:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 94bb450ddcd3561d55b2d9f73e92f6db8bcee8f3b35a34a2a377a583917fceec
[INFO] running `"docker" "start" "-a" "94bb450ddcd3561d55b2d9f73e92f6db8bcee8f3b35a34a2a377a583917fceec"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]    Compiling regex v1.1.4
[INFO] [stderr]    Compiling nix v0.13.0
[INFO] [stderr]    Compiling bytesize v0.1.3
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling tokio-sync v0.1.4
[INFO] [stderr]    Compiling futures-timer v0.1.1
[INFO] [stderr]    Compiling tokio-executor v0.1.7
[INFO] [stderr]    Compiling rppal v0.11.1
[INFO] [stderr]    Compiling libudev-sys v0.1.4
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling crossbeam-deque v0.6.3
[INFO] [stderr]    Compiling udev v0.2.0
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling tokio-current-thread v0.1.6
[INFO] [stderr]    Compiling tokio-timer v0.2.10
[INFO] [stderr]    Compiling tokio-threadpool v0.1.13
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling crossbeam v0.6.0
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.9
[INFO] [stderr]    Compiling systemstat v0.1.4
[INFO] [stderr]    Compiling quote v0.6.11
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio-uds v0.2.5
[INFO] [stderr]    Compiling tokio-tcp v0.1.3
[INFO] [stderr]    Compiling tokio-udp v0.1.3
[INFO] [stderr]    Compiling tokio v0.1.18
[INFO] [stderr]    Compiling dbus-tokio v0.3.0
[INFO] [stderr]    Compiling keycode v0.1.1
[INFO] [stderr]    Compiling bluster v0.1.2
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/keycode-0.1.1/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(try_from)]
[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 `keycode`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "94bb450ddcd3561d55b2d9f73e92f6db8bcee8f3b35a34a2a377a583917fceec"`
[INFO] running `"docker" "rm" "-f" "94bb450ddcd3561d55b2d9f73e92f6db8bcee8f3b35a34a2a377a583917fceec"`
[INFO] [stdout] 94bb450ddcd3561d55b2d9f73e92f6db8bcee8f3b35a34a2a377a583917fceec