[INFO] updating cached repository u9520107/sweep
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/u9520107/sweep
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/u9520107/sweep" "work/ex/beta-1.38-1/sources/1.37.0/gh/u9520107/sweep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/u9520107/sweep'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/u9520107/sweep" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/u9520107/sweep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/u9520107/sweep'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1180d79685412f4762a8fddb36bdbda3d31d6aa1
[INFO] sha for GitHub repo u9520107/sweep: 1180d79685412f4762a8fddb36bdbda3d31d6aa1
[INFO] validating manifest of u9520107/sweep 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 u9520107/sweep 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 u9520107/sweep
[INFO] finished frobbing u9520107/sweep
[INFO] frobbed toml for u9520107/sweep written to work/ex/beta-1.38-1/sources/1.37.0/gh/u9520107/sweep/Cargo.toml
[INFO] started frobbing u9520107/sweep
[INFO] finished frobbing u9520107/sweep
[INFO] frobbed toml for u9520107/sweep written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/u9520107/sweep/Cargo.toml
[INFO] crate u9520107/sweep 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing u9520107/sweep 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/u9520107/sweep:/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] f2c19d63a5183e64b296d83f35e1ad8fdd68ef0e5fd8f83022b3b13881fa650c
[INFO] running `"docker" "start" "-a" "f2c19d63a5183e64b296d83f35e1ad8fdd68ef0e5fd8f83022b3b13881fa650c"`
[INFO] [stderr]    Compiling sweep v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0463]: can't find crate for `regex`
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | extern crate regex;
[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 `sweep`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f2c19d63a5183e64b296d83f35e1ad8fdd68ef0e5fd8f83022b3b13881fa650c"`
[INFO] running `"docker" "rm" "-f" "f2c19d63a5183e64b296d83f35e1ad8fdd68ef0e5fd8f83022b3b13881fa650c"`
[INFO] [stdout] f2c19d63a5183e64b296d83f35e1ad8fdd68ef0e5fd8f83022b3b13881fa650c