[INFO] updating cached repository shenfe/jast
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/shenfe/jast
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/shenfe/jast" "work/ex/beta-1.38-1/sources/1.37.0/gh/shenfe/jast"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/shenfe/jast'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/shenfe/jast" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shenfe/jast"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shenfe/jast'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 80e6c427da3b3494e091a7c970c3d78821a16148
[INFO] sha for GitHub repo shenfe/jast: 80e6c427da3b3494e091a7c970c3d78821a16148
[INFO] validating manifest of shenfe/jast 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 shenfe/jast 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 shenfe/jast
[INFO] finished frobbing shenfe/jast
[INFO] frobbed toml for shenfe/jast written to work/ex/beta-1.38-1/sources/1.37.0/gh/shenfe/jast/Cargo.toml
[INFO] started frobbing shenfe/jast
[INFO] finished frobbing shenfe/jast
[INFO] frobbed toml for shenfe/jast written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/shenfe/jast/Cargo.toml
[INFO] crate shenfe/jast 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 shenfe/jast 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/shenfe/jast:/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] aefbcfa371c74c6e9c0c2dab58f8ad1933e200e12054464f94d86527a3c01dc2
[INFO] running `"docker" "start" "-a" "aefbcfa371c74c6e9c0c2dab58f8ad1933e200e12054464f94d86527a3c01dc2"`
[INFO] [stderr]    Compiling pest v1.0.3
[INFO] [stderr]    Compiling pest_derive v1.0.3
[INFO] [stderr]    Compiling jast v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: couldn't read build.rs: No such file or directory (os error 2)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `jast`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "aefbcfa371c74c6e9c0c2dab58f8ad1933e200e12054464f94d86527a3c01dc2"`
[INFO] running `"docker" "rm" "-f" "aefbcfa371c74c6e9c0c2dab58f8ad1933e200e12054464f94d86527a3c01dc2"`
[INFO] [stdout] aefbcfa371c74c6e9c0c2dab58f8ad1933e200e12054464f94d86527a3c01dc2