[INFO] crate amethyst_audio 0.6.0 is already in cache
[INFO] extracting crate amethyst_audio 0.6.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/amethyst_audio/0.6.0
[INFO] extracting crate amethyst_audio 0.6.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/amethyst_audio/0.6.0
[INFO] validating manifest of amethyst_audio-0.6.0 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 amethyst_audio-0.6.0 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 amethyst_audio-0.6.0
[INFO] finished frobbing amethyst_audio-0.6.0
[INFO] frobbed toml for amethyst_audio-0.6.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/amethyst_audio/0.6.0/Cargo.toml
[INFO] started frobbing amethyst_audio-0.6.0
[INFO] finished frobbing amethyst_audio-0.6.0
[INFO] frobbed toml for amethyst_audio-0.6.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/amethyst_audio/0.6.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing amethyst_audio-0.6.0 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/amethyst_audio/0.6.0:/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] 661069150a17fad5ed29fe8043d3b415cdd597db7cf03cc0f8e50150e3843686
[INFO] running `"docker" "start" "-a" "661069150a17fad5ed29fe8043d3b415cdd597db7cf03cc0f8e50150e3843686"`
[INFO] [stderr]    Compiling alsa-sys v0.1.2
[INFO] [stderr]    Compiling minimp3 v0.3.3
[INFO] [stderr]    Compiling amethyst_error v0.1.0
[INFO] [stderr]    Compiling quickcheck v0.8.5
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling lewton v0.9.4
[INFO] [stderr]    Compiling nalgebra v0.18.0
[INFO] [stderr]    Compiling cpal v0.8.2
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling rayon v1.1.0
[INFO] [stderr]    Compiling alga_derive v0.9.1
[INFO] [stderr]    Compiling crossbeam-channel v0.2.6
[INFO] [stderr]    Compiling crossbeam v0.4.1
[INFO] [stderr]    Compiling hibitset v0.5.4
[INFO] [stderr]    Compiling shred v0.7.2
[INFO] [stderr]    Compiling specs v0.14.3
[INFO] [stderr]    Compiling specs-hierarchy v0.3.1
[INFO] [stderr]    Compiling amethyst_core v0.6.0
[INFO] [stderr]    Compiling rodio v0.9.0
[INFO] [stderr]    Compiling amethyst_assets v0.7.0
[INFO] [stderr]    Compiling amethyst_audio v0.6.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 41s
[INFO] running `"docker" "inspect" "661069150a17fad5ed29fe8043d3b415cdd597db7cf03cc0f8e50150e3843686"`
[INFO] running `"docker" "rm" "-f" "661069150a17fad5ed29fe8043d3b415cdd597db7cf03cc0f8e50150e3843686"`
[INFO] [stdout] 661069150a17fad5ed29fe8043d3b415cdd597db7cf03cc0f8e50150e3843686
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/amethyst_audio/0.6.0:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 8d296fd4343791b89a0ef943983f9fa31d62e9a38fb9353e4ae1e373a8751fcf
[INFO] running `"docker" "start" "-a" "8d296fd4343791b89a0ef943983f9fa31d62e9a38fb9353e4ae1e373a8751fcf"`
[INFO] [stderr]    Compiling x11-dl v2.18.4
[INFO] [stderr]    Compiling relevant v0.4.2
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling wayland-commons v0.21.13
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]    Compiling thread_profiler v0.3.0
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling gfx-hal v0.2.1
[INFO] [stderr]    Compiling palette v0.4.1
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]    Compiling wayland-client v0.21.13
[INFO] [stderr]    Compiling parking_lot v0.7.1
[INFO] [stderr]    Compiling image v0.21.3
[INFO] [stderr]    Compiling wayland-protocols v0.21.13
[INFO] [stderr]    Compiling genmesh v0.6.2
[INFO] [stderr]    Compiling smithay-client-toolkit v0.4.6
[INFO] [stderr]    Compiling winit v0.19.2
[INFO] [stderr]    Compiling amethyst_window v0.1.0
[INFO] [stderr]    Compiling amethyst_input v0.7.1
[INFO] [stderr]    Compiling amethyst_controls v0.5.0
[INFO] [stderr]    Compiling gfx-backend-empty v0.2.1
[INFO] [stderr]    Compiling rendy-memory v0.3.0
[INFO] [stderr]    Compiling rendy-descriptor v0.3.0
[INFO] [stderr]    Compiling rendy-chain v0.3.1
[INFO] [stderr]    Compiling rendy-util v0.3.1
[INFO] [stderr]    Compiling rendy-command v0.3.0
[INFO] [stderr]    Compiling rendy-resource v0.3.0
[INFO] [stderr]    Compiling rendy-wsi v0.3.0
[INFO] [stderr]    Compiling rendy-factory v0.3.1
[INFO] [stderr]    Compiling rendy-frame v0.3.0
[INFO] [stderr]    Compiling rendy-shader v0.3.0
[INFO] [stderr]    Compiling rendy-mesh v0.3.1
[INFO] [stderr]    Compiling rendy-texture v0.3.0
[INFO] [stderr]    Compiling rendy-graph v0.3.2
[INFO] [stderr]    Compiling rendy v0.3.2
[INFO] [stderr]    Compiling amethyst_rendy v0.1.2
[INFO] [stderr] error: You must specify at least one graphical backend feature: "metal" , "vulkan" , "empty"
[INFO] [stderr] "See the wiki article https://github.com/amethyst/amethyst/wiki/GraphicalBackendError for more details."
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/amethyst_rendy-0.1.2/src/types.rs:112:1
[INFO] [stderr]     |
[INFO] [stderr] 112 | / impl_backends!(
[INFO] [stderr] 113 | |     // DirectX 12 is currently disabled because of incomplete gfx-hal support for it.
[INFO] [stderr] 114 | |     // It will be re-enabled when it actually works.
[INFO] [stderr] 115 | |     // Dx12, "dx12", rendy::dx12::Backend; 
[INFO] [stderr] ...   |
[INFO] [stderr] 118 | |     Empty, "empty", rendy::empty::Backend;
[INFO] [stderr] 119 | | );
[INFO] [stderr]     | |__^ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `amethyst_rendy`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "8d296fd4343791b89a0ef943983f9fa31d62e9a38fb9353e4ae1e373a8751fcf"`
[INFO] running `"docker" "rm" "-f" "8d296fd4343791b89a0ef943983f9fa31d62e9a38fb9353e4ae1e373a8751fcf"`
[INFO] [stdout] 8d296fd4343791b89a0ef943983f9fa31d62e9a38fb9353e4ae1e373a8751fcf