[INFO] cloning repository drone-os/drone
[INFO] running `"git" "clone" "--bare" "git://github.com/drone-os/drone.git" "work/cache/sources/gh/drone-os/drone"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/drone-os/drone'...
[INFO] running `"git" "clone" "work/cache/sources/gh/drone-os/drone" "work/ex/beta-1.37-6/sources/1.36.0/gh/drone-os/drone"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/drone-os/drone'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/drone-os/drone" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/drone-os/drone"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/drone-os/drone'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f33340117bdbf04cafc33c988980af7d0875160f
[INFO] sha for GitHub repo drone-os/drone: f33340117bdbf04cafc33c988980af7d0875160f
[INFO] validating manifest of drone-os/drone on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of drone-os/drone on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing drone-os/drone
[INFO] finished frobbing drone-os/drone
[INFO] frobbed toml for drone-os/drone written to work/ex/beta-1.37-6/sources/1.36.0/gh/drone-os/drone/Cargo.toml
[INFO] started frobbing drone-os/drone
[INFO] finished frobbing drone-os/drone
[INFO] frobbed toml for drone-os/drone written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/drone-os/drone/Cargo.toml
[INFO] crate drone-os/drone already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing drone-os/drone against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/drone-os/drone:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] ec92239413e96699c34cd04c067d2407fda7d53207b7f47f109ad3a852fe22ec
[INFO] running `"docker" "start" "-a" "ec92239413e96699c34cd04c067d2407fda7d53207b7f47f109ad3a852fe22ec"`
[INFO] [stderr]    Compiling structopt-derive v0.2.15
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling exitfailure v0.5.1
[INFO] [stderr]    Compiling structopt v0.2.15
[INFO] [stderr]    Compiling drone v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(generator_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(generators)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(todo_macro)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `drone`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ec92239413e96699c34cd04c067d2407fda7d53207b7f47f109ad3a852fe22ec"`
[INFO] running `"docker" "rm" "-f" "ec92239413e96699c34cd04c067d2407fda7d53207b7f47f109ad3a852fe22ec"`
[INFO] [stdout] ec92239413e96699c34cd04c067d2407fda7d53207b7f47f109ad3a852fe22ec