[INFO] crate sorter 0.4.0 is already in cache
[INFO] extracting crate sorter 0.4.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/sorter/0.4.0
[INFO] extracting crate sorter 0.4.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/sorter/0.4.0
[INFO] validating manifest of sorter-0.4.0 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 sorter-0.4.0 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 sorter-0.4.0
[INFO] finished frobbing sorter-0.4.0
[INFO] frobbed toml for sorter-0.4.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/sorter/0.4.0/Cargo.toml
[INFO] started frobbing sorter-0.4.0
[INFO] finished frobbing sorter-0.4.0
[INFO] frobbed toml for sorter-0.4.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/sorter/0.4.0/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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing sorter-0.4.0 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/sorter/0.4.0:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] f42e80ef2541dc1aecda66bd1f05d13baf5fc2214b77c835872072b2729723fb
[INFO] running `"docker" "start" "-a" "f42e80ef2541dc1aecda66bd1f05d13baf5fc2214b77c835872072b2729723fb"`
[INFO] [stderr]    Compiling sorter v0.4.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `"docker" "inspect" "f42e80ef2541dc1aecda66bd1f05d13baf5fc2214b77c835872072b2729723fb"`
[INFO] running `"docker" "rm" "-f" "f42e80ef2541dc1aecda66bd1f05d13baf5fc2214b77c835872072b2729723fb"`
[INFO] [stdout] f42e80ef2541dc1aecda66bd1f05d13baf5fc2214b77c835872072b2729723fb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/sorter/0.4.0:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 70c85d6d2e9ca8268d4d0d973eca9373067031275c9d0fb5ad6d4fcfe2bee99b
[INFO] running `"docker" "start" "-a" "70c85d6d2e9ca8268d4d0d973eca9373067031275c9d0fb5ad6d4fcfe2bee99b"`
[INFO] [stderr]    Compiling sorter v0.4.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Rng`
[INFO] [stderr]  --> tests/sorter.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | use rand::{Rng, thread_rng};
[INFO] [stderr]   |            ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `gen_iter` found for type `rand::prelude::ThreadRng` in the current scope
[INFO] [stderr]   --> tests/sorter.rs:23:34
[INFO] [stderr]    |
[INFO] [stderr] 23 |     make_test_vec = thread_rng().gen_iter::<i32>().take(1000).collect::<Vec<i32>>();
[INFO] [stderr]    |                                  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `gen_iter` found for type `rand::prelude::ThreadRng` in the current scope
[INFO] [stderr]   --> tests/sorter.rs:25:34
[INFO] [stderr]    |
[INFO] [stderr] 25 |     make_test_vec = thread_rng().gen_iter::<i32>().take(555).collect::<Vec<i32>>();
[INFO] [stderr]    |                                  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: Could not compile `sorter`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "70c85d6d2e9ca8268d4d0d973eca9373067031275c9d0fb5ad6d4fcfe2bee99b"`
[INFO] running `"docker" "rm" "-f" "70c85d6d2e9ca8268d4d0d973eca9373067031275c9d0fb5ad6d4fcfe2bee99b"`
[INFO] [stdout] 70c85d6d2e9ca8268d4d0d973eca9373067031275c9d0fb5ad6d4fcfe2bee99b