[INFO] updating cached repository dpc/rhex
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dpc/rhex
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dpc/rhex" "work/ex/beta-1.38-1/sources/1.37.0/gh/dpc/rhex"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/dpc/rhex'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dpc/rhex" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dpc/rhex"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dpc/rhex'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1359daa83889e204d5075c88159e6b507353ea72
[INFO] sha for GitHub repo dpc/rhex: 1359daa83889e204d5075c88159e6b507353ea72
[INFO] validating manifest of dpc/rhex 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 dpc/rhex 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 dpc/rhex
[INFO] finished frobbing dpc/rhex
[INFO] frobbed toml for dpc/rhex written to work/ex/beta-1.38-1/sources/1.37.0/gh/dpc/rhex/Cargo.toml
[INFO] started frobbing dpc/rhex
[INFO] finished frobbing dpc/rhex
[INFO] frobbed toml for dpc/rhex written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dpc/rhex/Cargo.toml
[INFO] crate dpc/rhex already has a lockfile, it will not be regenerated
[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 dpc/rhex 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/dpc/rhex:/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] f04e9a74973a210894196467c1bbe856f923d661e2690118c024610ce9bcf432
[INFO] running `"docker" "start" "-a" "f04e9a74973a210894196467c1bbe856f923d661e2690118c024610ce9bcf432"`
[INFO] [stderr]    Compiling num-traits v0.1.42
[INFO] [stderr]    Compiling libc v0.2.36
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]    Compiling pkg-config v0.3.9
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling dpc-simplemap v0.1.0
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling rand v0.3.20
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling time v0.1.39
[INFO] [stderr]    Compiling num-integer v0.1.35
[INFO] [stderr]    Compiling fern v0.3.5
[INFO] [stderr]    Compiling num-iter v0.1.34
[INFO] [stderr]    Compiling ncurses v5.91.0
[INFO] [stderr]    Compiling num-bigint v0.1.41
[INFO] [stderr]    Compiling num-complex v0.1.41
[INFO] [stderr]    Compiling num-rational v0.1.41
[INFO] [stderr]    Compiling num v0.1.41
[INFO] [stderr]    Compiling hex2d v0.2.0
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling hex2d-dpcext v0.0.9
[INFO] [stderr] error[E0277]: the trait bound `u32: num::Signed` is not satisfied
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/hex2d-dpcext-0.0.9/src/algo.rs:228:5
[INFO] [stderr]     |
[INFO] [stderr] 228 | /     fn los_check_line<FOpaqueness, I=u32>(
[INFO] [stderr] 229 | |         opaqueness : &FOpaqueness,
[INFO] [stderr] 230 | |         light: I,
[INFO] [stderr] 231 | |         start : Coordinate<I>,
[INFO] [stderr] ...   |
[INFO] [stderr] 266 | |         }
[INFO] [stderr] 267 | |     }
[INFO] [stderr]     | |_____^ the trait `num::Signed` is not implemented for `u32`
[INFO] [stderr]     |
[INFO] [stderr]     = note: required because of the requirements on the impl of `hex2d::Integer` for `u32`
[INFO] [stderr] note: required by `algo::los2::los_check_line`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/hex2d-dpcext-0.0.9/src/algo.rs:228:5
[INFO] [stderr]     |
[INFO] [stderr] 228 | /     fn los_check_line<FOpaqueness, I=u32>(
[INFO] [stderr] 229 | |         opaqueness : &FOpaqueness,
[INFO] [stderr] 230 | |         light: I,
[INFO] [stderr] 231 | |         start : Coordinate<I>,
[INFO] [stderr] ...   |
[INFO] [stderr] 266 | |         }
[INFO] [stderr] 267 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: Could not compile `hex2d-dpcext`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "f04e9a74973a210894196467c1bbe856f923d661e2690118c024610ce9bcf432"`
[INFO] running `"docker" "rm" "-f" "f04e9a74973a210894196467c1bbe856f923d661e2690118c024610ce9bcf432"`
[INFO] [stdout] f04e9a74973a210894196467c1bbe856f923d661e2690118c024610ce9bcf432