[INFO] crate pwrs 1.1.0 is already in cache
[INFO] extracting crate pwrs 1.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/pwrs/1.1.0
[INFO] extracting crate pwrs 1.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pwrs/1.1.0
[INFO] validating manifest of pwrs-1.1.0 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 pwrs-1.1.0 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 pwrs-1.1.0
[INFO] finished frobbing pwrs-1.1.0
[INFO] frobbed toml for pwrs-1.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/pwrs/1.1.0/Cargo.toml
[INFO] started frobbing pwrs-1.1.0
[INFO] finished frobbing pwrs-1.1.0
[INFO] frobbed toml for pwrs-1.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pwrs/1.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing pwrs-1.1.0 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-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/pwrs/1.1.0:/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] 3c420fdef6527b74c64d3387ea3c7e8b0acd59a0f08f076301fe2d9da83a7c27
[INFO] running `"docker" "start" "-a" "3c420fdef6527b74c64d3387ea3c7e8b0acd59a0f08f076301fe2d9da83a7c27"`
[INFO] [stderr]    Compiling pwrs v1.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0425]: cannot find function `sample` in crate `rand`
[INFO] [stderr]   --> src/main.rs:53:11
[INFO] [stderr]    |
[INFO] [stderr] 53 |     rand::sample(&mut rng, words.iter(), cfg.number)
[INFO] [stderr]    |           ^^^^^^ not found in `rand`
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]    |
[INFO] [stderr] 9  | use rand::seq::index::sample;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]    --> src/main.rs:130:14
[INFO] [stderr]     |
[INFO] [stderr] 130 |     for _ in (0..cfg.count) {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::slice::<impl [T]>::connect': renamed to join
[INFO] [stderr]    --> src/main.rs:136:25
[INFO] [stderr]     |
[INFO] [stderr] 136 |         let out = inter.connect(" ");
[INFO] [stderr]     |                         ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `pwrs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3c420fdef6527b74c64d3387ea3c7e8b0acd59a0f08f076301fe2d9da83a7c27"`
[INFO] running `"docker" "rm" "-f" "3c420fdef6527b74c64d3387ea3c7e8b0acd59a0f08f076301fe2d9da83a7c27"`
[INFO] [stdout] 3c420fdef6527b74c64d3387ea3c7e8b0acd59a0f08f076301fe2d9da83a7c27