[INFO] crate coffee 0.3.1 is already in cache
[INFO] extracting crate coffee 0.3.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/coffee/0.3.1
[INFO] extracting crate coffee 0.3.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/coffee/0.3.1
[INFO] validating manifest of coffee-0.3.1 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 coffee-0.3.1 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 coffee-0.3.1
[INFO] finished frobbing coffee-0.3.1
[INFO] frobbed toml for coffee-0.3.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/coffee/0.3.1/Cargo.toml
[INFO] started frobbing coffee-0.3.1
[INFO] finished frobbing coffee-0.3.1
[INFO] frobbed toml for coffee-0.3.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/coffee/0.3.1/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] testing coffee-0.3.1 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/coffee/0.3.1:/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] 33d05773057d9e3cd95931a8858f49b2833cb56967dc4e4977687797af005580
[INFO] running `"docker" "start" "-a" "33d05773057d9e3cd95931a8858f49b2833cb56967dc4e4977687797af005580"`
[INFO] [stderr]    Compiling ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling adler32 v1.0.3
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling lzw v0.10.0
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling rawpointer v0.1.0
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling color_quant v1.0.1
[INFO] [stderr]    Compiling scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling coffee v0.3.1 (/opt/crater/workdir)
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr] error: You need to enable a graphics backend feature. Available options: opengl, vulkan, metal, dx11, dx12.
[INFO] [stderr]   --> build.rs:8:1
[INFO] [stderr]    |
[INFO] [stderr] 8  | / compile_error!(
[INFO] [stderr] 9  | |     "You need to enable a graphics backend feature. \
[INFO] [stderr] 10 | |      Available options: opengl, vulkan, metal, dx11, dx12."
[INFO] [stderr] 11 | | );
[INFO] [stderr]    | |__^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `coffee`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "33d05773057d9e3cd95931a8858f49b2833cb56967dc4e4977687797af005580"`
[INFO] running `"docker" "rm" "-f" "33d05773057d9e3cd95931a8858f49b2833cb56967dc4e4977687797af005580"`
[INFO] [stdout] 33d05773057d9e3cd95931a8858f49b2833cb56967dc4e4977687797af005580