[INFO] updating cached repository gavynriebau/filesystem_race_condition_bug
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/gavynriebau/filesystem_race_condition_bug
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/gavynriebau/filesystem_race_condition_bug" "work/ex/beta-1.38-1/sources/1.37.0/gh/gavynriebau/filesystem_race_condition_bug"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/gavynriebau/filesystem_race_condition_bug'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/gavynriebau/filesystem_race_condition_bug" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gavynriebau/filesystem_race_condition_bug"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gavynriebau/filesystem_race_condition_bug'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8d24771306120ef7022e234597155efebadd92c1
[INFO] sha for GitHub repo gavynriebau/filesystem_race_condition_bug: 8d24771306120ef7022e234597155efebadd92c1
[INFO] validating manifest of gavynriebau/filesystem_race_condition_bug 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 gavynriebau/filesystem_race_condition_bug 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 gavynriebau/filesystem_race_condition_bug
[INFO] finished frobbing gavynriebau/filesystem_race_condition_bug
[INFO] frobbed toml for gavynriebau/filesystem_race_condition_bug written to work/ex/beta-1.38-1/sources/1.37.0/gh/gavynriebau/filesystem_race_condition_bug/Cargo.toml
[INFO] started frobbing gavynriebau/filesystem_race_condition_bug
[INFO] finished frobbing gavynriebau/filesystem_race_condition_bug
[INFO] frobbed toml for gavynriebau/filesystem_race_condition_bug written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gavynriebau/filesystem_race_condition_bug/Cargo.toml
[INFO] crate gavynriebau/filesystem_race_condition_bug 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 gavynriebau/filesystem_race_condition_bug against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/gavynriebau/filesystem_race_condition_bug:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 76c2ce2bfb8453de3da149c9cfd09de5f3f846f7331c793a45bf811c420e30fc
[INFO] running `"docker" "start" "-a" "76c2ce2bfb8453de3da149c9cfd09de5f3f846f7331c793a45bf811c420e30fc"`
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling filesystem v0.4.2
[INFO] [stderr]    Compiling filesystem_race_condition_bug v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `filesystem::*`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use filesystem::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::Path`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::path::Path;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0601]: `main` function not found in crate `filesystem_race_condition_bug`
[INFO] [stderr]   |
[INFO] [stderr]   = note: consider adding a `main` function to `src/main.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: Could not compile `filesystem_race_condition_bug`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "76c2ce2bfb8453de3da149c9cfd09de5f3f846f7331c793a45bf811c420e30fc"`
[INFO] running `"docker" "rm" "-f" "76c2ce2bfb8453de3da149c9cfd09de5f3f846f7331c793a45bf811c420e30fc"`
[INFO] [stdout] 76c2ce2bfb8453de3da149c9cfd09de5f3f846f7331c793a45bf811c420e30fc