[INFO] crate uikit 0.0.2 is already in cache
[INFO] extracting crate uikit 0.0.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/uikit/0.0.2
[INFO] extracting crate uikit 0.0.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/uikit/0.0.2
[INFO] validating manifest of uikit-0.0.2 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 uikit-0.0.2 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 uikit-0.0.2
[INFO] finished frobbing uikit-0.0.2
[INFO] frobbed toml for uikit-0.0.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/uikit/0.0.2/Cargo.toml
[INFO] started frobbing uikit-0.0.2
[INFO] finished frobbing uikit-0.0.2
[INFO] frobbed toml for uikit-0.0.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/uikit/0.0.2/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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[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 uikit-0.0.2 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-6/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/uikit/0.0.2:/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] e9223634fd4f8fcd9015b11e15af186603d8320ea187e3a004099540611f63af
[INFO] running `"docker" "start" "-a" "e9223634fd4f8fcd9015b11e15af186603d8320ea187e3a004099540611f63af"`
[INFO] [stderr]    Compiling core-foundation-sys v0.2.3
[INFO] [stderr]    Compiling block v0.1.6
[INFO] [stderr]    Compiling malloc_buf v0.0.6
[INFO] [stderr]    Compiling serde v0.6.15
[INFO] [stderr]    Compiling objc v0.2.6
[INFO] [stderr] error: native frameworks are only available on macOS targets
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `core-foundation-sys`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "e9223634fd4f8fcd9015b11e15af186603d8320ea187e3a004099540611f63af"`
[INFO] running `"docker" "rm" "-f" "e9223634fd4f8fcd9015b11e15af186603d8320ea187e3a004099540611f63af"`
[INFO] [stdout] e9223634fd4f8fcd9015b11e15af186603d8320ea187e3a004099540611f63af