[INFO] updating cached repository lukaslihotzki/uc_pixelflood
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lukaslihotzki/uc_pixelflood
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lukaslihotzki/uc_pixelflood" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/lukaslihotzki/uc_pixelflood"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/lukaslihotzki/uc_pixelflood'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lukaslihotzki/uc_pixelflood" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/lukaslihotzki/uc_pixelflood"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/lukaslihotzki/uc_pixelflood'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 85e54ab3f2d84e07934b67f7e2a330880b7c5c43
[INFO] sha for GitHub repo lukaslihotzki/uc_pixelflood: 85e54ab3f2d84e07934b67f7e2a330880b7c5c43
[INFO] validating manifest of lukaslihotzki/uc_pixelflood on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of lukaslihotzki/uc_pixelflood on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing lukaslihotzki/uc_pixelflood
[INFO] finished frobbing lukaslihotzki/uc_pixelflood
[INFO] frobbed toml for lukaslihotzki/uc_pixelflood written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/lukaslihotzki/uc_pixelflood/Cargo.toml
[INFO] started frobbing lukaslihotzki/uc_pixelflood
[INFO] finished frobbing lukaslihotzki/uc_pixelflood
[INFO] frobbed toml for lukaslihotzki/uc_pixelflood written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/lukaslihotzki/uc_pixelflood/Cargo.toml
[INFO] crate lukaslihotzki/uc_pixelflood already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking lukaslihotzki/uc_pixelflood against try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-1/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/lukaslihotzki/uc_pixelflood:/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=forbid" "-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" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 735ca1101a1b31c9b9b2c0a42568dfe4637170d06eb646c469c2b567434a822e
[INFO] running `"docker" "start" "-a" "735ca1101a1b31c9b9b2c0a42568dfe4637170d06eb646c469c2b567434a822e"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.27
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.13 (https://github.com/rust-lang-nursery/futures-rs.git#6e96a856)
[INFO] [stderr]    Compiling cortex-m-rt v0.6.7 (https://github.com/rust-embedded/cortex-m-rt.git#989922dd)
[INFO] [stderr] error[E0463]: can't find crate for `core`
[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 `futures-core-preview`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "735ca1101a1b31c9b9b2c0a42568dfe4637170d06eb646c469c2b567434a822e"`
[INFO] running `"docker" "rm" "-f" "735ca1101a1b31c9b9b2c0a42568dfe4637170d06eb646c469c2b567434a822e"`
[INFO] [stdout] 735ca1101a1b31c9b9b2c0a42568dfe4637170d06eb646c469c2b567434a822e