[INFO] updating cached repository Pungyeon/rust-sample-app
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Pungyeon/rust-sample-app
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Pungyeon/rust-sample-app" "work/ex/beta-1.38-1/sources/1.37.0/gh/Pungyeon/rust-sample-app"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Pungyeon/rust-sample-app'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Pungyeon/rust-sample-app" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Pungyeon/rust-sample-app"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Pungyeon/rust-sample-app'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d42914c3daed5c499d6347c42d7f79554cd2e101
[INFO] sha for GitHub repo Pungyeon/rust-sample-app: d42914c3daed5c499d6347c42d7f79554cd2e101
[INFO] validating manifest of Pungyeon/rust-sample-app 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 Pungyeon/rust-sample-app 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 Pungyeon/rust-sample-app
[INFO] finished frobbing Pungyeon/rust-sample-app
[INFO] frobbed toml for Pungyeon/rust-sample-app written to work/ex/beta-1.38-1/sources/1.37.0/gh/Pungyeon/rust-sample-app/Cargo.toml
[INFO] started frobbing Pungyeon/rust-sample-app
[INFO] finished frobbing Pungyeon/rust-sample-app
[INFO] frobbed toml for Pungyeon/rust-sample-app written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Pungyeon/rust-sample-app/Cargo.toml
[INFO] crate Pungyeon/rust-sample-app 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 Pungyeon/rust-sample-app 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Pungyeon/rust-sample-app:/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] bcbd0dbf4a41b2b66287921d984c41cfb655825d431d064b7cdffa929c63615f
[INFO] running `"docker" "start" "-a" "bcbd0dbf4a41b2b66287921d984c41cfb655825d431d064b7cdffa929c63615f"`
[INFO] [stderr]    Compiling rust_test v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0583]: file not found for module `lib`
[INFO] [stderr]  --> src/bin/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | mod lib;
[INFO] [stderr]   |     ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = help: name the file either lib.rs or lib/mod.rs inside the directory "src/bin"
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0583`.
[INFO] [stderr] error: Could not compile `rust_test`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "bcbd0dbf4a41b2b66287921d984c41cfb655825d431d064b7cdffa929c63615f"`
[INFO] running `"docker" "rm" "-f" "bcbd0dbf4a41b2b66287921d984c41cfb655825d431d064b7cdffa929c63615f"`
[INFO] [stdout] bcbd0dbf4a41b2b66287921d984c41cfb655825d431d064b7cdffa929c63615f