[INFO] updating cached repository https://github.com/Osspial/winit-cube-rotate
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 38231b27372aca40dcc79b27c5d50e790c123ea7
[INFO] testing Osspial/winit-cube-rotate against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2FOsspial%2Fwinit-cube-rotate" "work/builds/worker-7/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Osspial/winit-cube-rotate on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Osspial/winit-cube-rotate
[INFO] finished tweaking git repo https://github.com/Osspial/winit-cube-rotate
[INFO] tweaked toml for git repo https://github.com/Osspial/winit-cube-rotate written to work/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Osspial/winit-cube-rotate already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] d4a33f2b139b9941fab623c8a85326271df1c9b1f8cb2a5ad11221986ae0267f
[INFO] running `"docker" "start" "-a" "d4a33f2b139b9941fab623c8a85326271df1c9b1f8cb2a5ad11221986ae0267f"`
[INFO] [stderr]    Compiling mio v0.6.19
[INFO] [stderr]    Compiling wayland-scanner v0.23.5
[INFO] [stderr]    Compiling wayland-sys v0.23.5
[INFO] [stderr]    Compiling gl_generator v0.7.0
[INFO] [stderr]    Compiling gl_generator v0.11.0
[INFO] [stderr]    Compiling derivative v1.0.2
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling derive_more v0.13.0
[INFO] [stderr]    Compiling gullery_macros v0.1.0 (https://github.com/Osspial/gullery.git#56902eea)
[INFO] [stderr]    Compiling wayland-commons v0.23.5
[INFO] [stderr]    Compiling gullery_bindings v0.1.0 (https://github.com/Osspial/gullery.git#56902eea)
[INFO] [stderr]    Compiling mio-extras v2.0.5
[INFO] [stderr]    Compiling glutin_glx_sys v0.1.5
[INFO] [stderr]    Compiling glutin_egl_sys v0.1.3
[INFO] [stderr]    Compiling calloop v0.4.4
[INFO] [stderr]    Compiling wayland-client v0.23.5
[INFO] [stderr]    Compiling wayland-protocols v0.23.5
[INFO] [stderr]    Compiling cgmath-geometry v0.1.0 (https://github.com/Osspial/cgmath-geometry.git#4787ef75)
[INFO] [stderr]    Compiling gullery v0.1.0 (https://github.com/Osspial/gullery.git#56902eea)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/gullery-54a8768087ce9e24/56902ee/src/lib.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | #![feature(never_type)]
[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 `gullery`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "d4a33f2b139b9941fab623c8a85326271df1c9b1f8cb2a5ad11221986ae0267f"`
[INFO] running `"docker" "rm" "-f" "d4a33f2b139b9941fab623c8a85326271df1c9b1f8cb2a5ad11221986ae0267f"`
[INFO] [stdout] d4a33f2b139b9941fab623c8a85326271df1c9b1f8cb2a5ad11221986ae0267f