[INFO] crate consecutive-vecmap 0.1.1 is already in cache
[INFO] extracting crate consecutive-vecmap 0.1.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/consecutive-vecmap/0.1.1
[INFO] extracting crate consecutive-vecmap 0.1.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/consecutive-vecmap/0.1.1
[INFO] validating manifest of consecutive-vecmap-0.1.1 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 consecutive-vecmap-0.1.1 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 consecutive-vecmap-0.1.1
[INFO] finished frobbing consecutive-vecmap-0.1.1
[INFO] frobbed toml for consecutive-vecmap-0.1.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/consecutive-vecmap/0.1.1/Cargo.toml
[INFO] started frobbing consecutive-vecmap-0.1.1
[INFO] finished frobbing consecutive-vecmap-0.1.1
[INFO] frobbed toml for consecutive-vecmap-0.1.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/consecutive-vecmap/0.1.1/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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing consecutive-vecmap-0.1.1 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-3/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/consecutive-vecmap/0.1.1:/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] 4a9cdb90c707f5d8415482797e9cd246fd89665812ef571698e3029744246715
[INFO] running `"docker" "start" "-a" "4a9cdb90c707f5d8415482797e9cd246fd89665812ef571698e3029744246715"`
[INFO] [stderr]    Compiling consecutive-vecmap v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused comparison that must be used
[INFO] [stderr]    --> src/lib.rs:203:13
[INFO] [stderr]     |
[INFO] [stderr] 203 |             self.head == None;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `"docker" "inspect" "4a9cdb90c707f5d8415482797e9cd246fd89665812ef571698e3029744246715"`
[INFO] running `"docker" "rm" "-f" "4a9cdb90c707f5d8415482797e9cd246fd89665812ef571698e3029744246715"`
[INFO] [stdout] 4a9cdb90c707f5d8415482797e9cd246fd89665812ef571698e3029744246715
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/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/consecutive-vecmap/0.1.1:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] d70bee01b627f556d2d9ec23923d6c9a747d20996c967364614203ed10aeaf94
[INFO] running `"docker" "start" "-a" "d70bee01b627f556d2d9ec23923d6c9a747d20996c967364614203ed10aeaf94"`
[INFO] [stderr]    Compiling consecutive-vecmap v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `rand::Rng`
[INFO] [stderr]  --> src/lib.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use rand::Rng;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `shuffle` found for type `rand::prelude::ThreadRng` in the current scope
[INFO] [stderr]    --> src/lib.rs:312:28
[INFO] [stderr]     |
[INFO] [stderr] 312 |         rand::thread_rng().shuffle(&mut random_vec);
[INFO] [stderr]     |                            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `consecutive-vecmap`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d70bee01b627f556d2d9ec23923d6c9a747d20996c967364614203ed10aeaf94"`
[INFO] running `"docker" "rm" "-f" "d70bee01b627f556d2d9ec23923d6c9a747d20996c967364614203ed10aeaf94"`
[INFO] [stdout] d70bee01b627f556d2d9ec23923d6c9a747d20996c967364614203ed10aeaf94