[INFO] updating cached repository McGittyHub/cubes-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/McGittyHub/cubes-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/McGittyHub/cubes-rs" "work/ex/beta-1.37-6/sources/1.36.0/gh/McGittyHub/cubes-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/McGittyHub/cubes-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/McGittyHub/cubes-rs" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/McGittyHub/cubes-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/McGittyHub/cubes-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4b078a42c3e27afd3107a171f8b7614319817036
[INFO] sha for GitHub repo McGittyHub/cubes-rs: 4b078a42c3e27afd3107a171f8b7614319817036
[INFO] validating manifest of McGittyHub/cubes-rs 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 McGittyHub/cubes-rs 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 McGittyHub/cubes-rs
[INFO] finished frobbing McGittyHub/cubes-rs
[INFO] frobbed toml for McGittyHub/cubes-rs written to work/ex/beta-1.37-6/sources/1.36.0/gh/McGittyHub/cubes-rs/Cargo.toml
[INFO] started frobbing McGittyHub/cubes-rs
[INFO] finished frobbing McGittyHub/cubes-rs
[INFO] frobbed toml for McGittyHub/cubes-rs written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/McGittyHub/cubes-rs/Cargo.toml
[INFO] crate McGittyHub/cubes-rs 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 McGittyHub/cubes-rs 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-3/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/McGittyHub/cubes-rs:/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] b3fdd5ae6bcd907f17ed555fe8fc2d70cc6a7326bb28298226011a218dd42a27
[INFO] running `"docker" "start" "-a" "b3fdd5ae6bcd907f17ed555fe8fc2d70cc6a7326bb28298226011a218dd42a27"`
[INFO] [stderr]    Compiling bit_field v0.9.0
[INFO] [stderr]    Compiling memmap v0.6.2
[INFO] [stderr]    Compiling shared_library v0.1.8
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling libloading v0.4.3
[INFO] [stderr]    Compiling tempfile v2.2.0
[INFO] [stderr]    Compiling noise v0.4.1
[INFO] [stderr]    Compiling num-bigint v0.1.41
[INFO] [stderr]    Compiling ordered-float v0.5.0
[INFO] [stderr]    Compiling gl_generator v0.7.0
[INFO] [stderr]    Compiling x11-dl v2.17.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling gfx_core v0.8.0
[INFO] [stderr]    Compiling dlib v0.4.0
[INFO] [stderr]    Compiling osmesa-sys v0.1.2
[INFO] [stderr]    Compiling backtrace v0.3.5
[INFO] [stderr]    Compiling rusttype v0.3.0
[INFO] [stderr]    Compiling wayland-sys v0.12.5
[INFO] [stderr]    Compiling cgmath v0.16.0
[INFO] [stderr]    Compiling num-rational v0.1.40
[INFO] [stderr]    Compiling gfx_gl v0.4.0
[INFO] [stderr]    Compiling glutin v0.12.0
[INFO] [stderr]    Compiling wayland-client v0.12.5
[INFO] [stderr]    Compiling num v0.1.41
[INFO] [stderr]    Compiling wayland-protocols v0.12.5
[INFO] [stderr]    Compiling wayland-kbd v0.13.1
[INFO] [stderr]    Compiling collision v0.14.0
[INFO] [stderr]    Compiling wayland-window v0.13.2
[INFO] [stderr]    Compiling winit v0.10.0
[INFO] [stderr]    Compiling gfx_device_gl v0.15.0
[INFO] [stderr]    Compiling gfx v0.17.1
[INFO] [stderr]    Compiling gfx_window_glutin v0.20.0
[INFO] [stderr]    Compiling gfx_glyph v0.8.0
[INFO] [stderr]    Compiling cubes-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(entry_and_modify)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `cubes-rs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b3fdd5ae6bcd907f17ed555fe8fc2d70cc6a7326bb28298226011a218dd42a27"`
[INFO] running `"docker" "rm" "-f" "b3fdd5ae6bcd907f17ed555fe8fc2d70cc6a7326bb28298226011a218dd42a27"`
[INFO] [stdout] b3fdd5ae6bcd907f17ed555fe8fc2d70cc6a7326bb28298226011a218dd42a27