[INFO] updating cached repository https://github.com/bpk-t/rust_practice
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1df7873e9a168056f85a8118ad00cb22173bc000
[INFO] testing bpk-t/rust_practice against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbpk-t%2Frust_practice" "work/builds/worker-7/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bpk-t/rust_practice 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 git repo https://github.com/bpk-t/rust_practice
[INFO] finished tweaking git repo https://github.com/bpk-t/rust_practice
[INFO] tweaked toml for git repo https://github.com/bpk-t/rust_practice written to work/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/bpk-t/rust_practice already has a lockfile, it will not be regenerated
[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] ac0e7a2db4e4323b2686b15257a98f3849282b270d4460f08d3f6b24a80430eb
[INFO] running `"docker" "start" "-a" "ac0e7a2db4e4323b2686b15257a98f3849282b270d4460f08d3f6b24a80430eb"`
[INFO] [stderr]    Compiling rust_practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0601]: `main` function not found in crate `lang_spec`
[INFO] [stderr]    --> src/bin/lang_spec.rs:2:1
[INFO] [stderr]     |
[INFO] [stderr] 2   | / #[cfg(test)]
[INFO] [stderr] 3   | | mod lang_spec {
[INFO] [stderr] 4   | |
[INFO] [stderr] 5   | |     #[test]
[INFO] [stderr] ...   |
[INFO] [stderr] 119 | |     }
[INFO] [stderr] 120 | | }
[INFO] [stderr]     | |_^ consider adding a `main` function to `src/bin/lang_spec.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 `rust_practice`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "ac0e7a2db4e4323b2686b15257a98f3849282b270d4460f08d3f6b24a80430eb"`
[INFO] running `"docker" "rm" "-f" "ac0e7a2db4e4323b2686b15257a98f3849282b270d4460f08d3f6b24a80430eb"`
[INFO] [stdout] ac0e7a2db4e4323b2686b15257a98f3849282b270d4460f08d3f6b24a80430eb