[INFO] updating cached repository SaturnTeam/rust-algorithms
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/SaturnTeam/rust-algorithms
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/SaturnTeam/rust-algorithms" "work/ex/beta-1.38-1/sources/1.37.0/gh/SaturnTeam/rust-algorithms"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/SaturnTeam/rust-algorithms'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/SaturnTeam/rust-algorithms" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/SaturnTeam/rust-algorithms"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/SaturnTeam/rust-algorithms'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 285781471f85260557e7b4c7abe2a364be9dd5b8
[INFO] sha for GitHub repo SaturnTeam/rust-algorithms: 285781471f85260557e7b4c7abe2a364be9dd5b8
[INFO] validating manifest of SaturnTeam/rust-algorithms 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 SaturnTeam/rust-algorithms 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 SaturnTeam/rust-algorithms
[INFO] finished frobbing SaturnTeam/rust-algorithms
[INFO] frobbed toml for SaturnTeam/rust-algorithms written to work/ex/beta-1.38-1/sources/1.37.0/gh/SaturnTeam/rust-algorithms/Cargo.toml
[INFO] started frobbing SaturnTeam/rust-algorithms
[INFO] finished frobbing SaturnTeam/rust-algorithms
[INFO] frobbed toml for SaturnTeam/rust-algorithms written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/SaturnTeam/rust-algorithms/Cargo.toml
[INFO] crate SaturnTeam/rust-algorithms 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing SaturnTeam/rust-algorithms 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/SaturnTeam/rust-algorithms:/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] 29f51d4509ef0d9d1469d32a7c5d0889ad1a78982273008ad05ced8694a7f238
[INFO] running `"docker" "start" "-a" "29f51d4509ef0d9d1469d32a7c5d0889ad1a78982273008ad05ced8694a7f238"`
[INFO] [stderr]    Compiling a v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `Rng`, `thread_rng`
[INFO] [stderr]  --> src/alg/max_pq.rs:5:18
[INFO] [stderr]   |
[INFO] [stderr] 5 | use self::rand::{thread_rng, Rng};
[INFO] [stderr]   |                  ^^^^^^^^^^  ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right': superseded by `trim_end`
[INFO] [stderr]    --> src/alg/uf.rs:182:28
[INFO] [stderr]     |
[INFO] [stderr] 182 |     let count = first_line.trim_right().parse::<usize>().unwrap();
[INFO] [stderr]     |                            ^^^^^^^^^^ help: replace the use of the deprecated item: `trim_end`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0282]: type annotations needed
[INFO] [stderr]   --> src/alg/max_pq.rs:99:13
[INFO] [stderr]    |
[INFO] [stderr] 99 |             Err(MyError::new("Priority queue underflow"));
[INFO] [stderr]    |             ^^^ cannot infer type for `T`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0282`.
[INFO] [stderr] error: Could not compile `a`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "29f51d4509ef0d9d1469d32a7c5d0889ad1a78982273008ad05ced8694a7f238"`
[INFO] running `"docker" "rm" "-f" "29f51d4509ef0d9d1469d32a7c5d0889ad1a78982273008ad05ced8694a7f238"`
[INFO] [stdout] 29f51d4509ef0d9d1469d32a7c5d0889ad1a78982273008ad05ced8694a7f238