[INFO] crate wpilib 0.4.0 is already in cache
[INFO] extracting crate wpilib 0.4.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/wpilib/0.4.0
[INFO] extracting crate wpilib 0.4.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/wpilib/0.4.0
[INFO] validating manifest of wpilib-0.4.0 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 wpilib-0.4.0 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 wpilib-0.4.0
[INFO] finished frobbing wpilib-0.4.0
[INFO] frobbed toml for wpilib-0.4.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/wpilib/0.4.0/Cargo.toml
[INFO] started frobbing wpilib-0.4.0
[INFO] finished frobbing wpilib-0.4.0
[INFO] frobbed toml for wpilib-0.4.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/wpilib/0.4.0/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] testing wpilib-0.4.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/wpilib/0.4.0:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 2ebcc5904bad22d3a02dee880fe10859ab47900040619e4cafac19a62a1783bc
[INFO] running `"docker" "start" "-a" "2ebcc5904bad22d3a02dee880fe10859ab47900040619e4cafac19a62a1783bc"`
[INFO] [stderr]    Compiling wpilib-sys v0.4.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr] error[E0463]: can't find crate for `core`
[INFO] [stderr]   |
[INFO] [stderr]   = note: the `arm-unknown-linux-gnueabi` target may not be installed
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: Could not compile `lazy_static`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "2ebcc5904bad22d3a02dee880fe10859ab47900040619e4cafac19a62a1783bc"`
[INFO] running `"docker" "rm" "-f" "2ebcc5904bad22d3a02dee880fe10859ab47900040619e4cafac19a62a1783bc"`
[INFO] [stdout] 2ebcc5904bad22d3a02dee880fe10859ab47900040619e4cafac19a62a1783bc