[INFO] crate urbit 0.1.0 is already in cache
[INFO] testing urbit-0.1.0 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate urbit 0.1.0 into work/builds/worker-7/source
[INFO] validating manifest of crates.io crate urbit 0.1.0 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate urbit 0.1.0
[INFO] finished tweaking crates.io crate urbit 0.1.0
[INFO] tweaked toml for crates.io crate urbit 0.1.0 written to work/builds/worker-7/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 9a3a70f16175fcc80de0b0ea6b6f3af1eb90ca70b868d6b5c36a135a7006d783
[INFO] running `"docker" "start" "-a" "9a3a70f16175fcc80de0b0ea6b6f3af1eb90ca70b868d6b5c36a135a7006d783"`
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling nock v0.4.0
[INFO] [stderr]    Compiling urbit v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0463]: can't find crate for `alloc_system`
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | extern crate alloc_system;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[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 `urbit`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "9a3a70f16175fcc80de0b0ea6b6f3af1eb90ca70b868d6b5c36a135a7006d783"`
[INFO] running `"docker" "rm" "-f" "9a3a70f16175fcc80de0b0ea6b6f3af1eb90ca70b868d6b5c36a135a7006d783"`
[INFO] [stdout] 9a3a70f16175fcc80de0b0ea6b6f3af1eb90ca70b868d6b5c36a135a7006d783