[INFO] crate linear_assignment 0.0.1 is already in cache
[INFO] extracting crate linear_assignment 0.0.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/linear_assignment/0.0.1
[INFO] extracting crate linear_assignment 0.0.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/linear_assignment/0.0.1
[INFO] validating manifest of linear_assignment-0.0.1 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 linear_assignment-0.0.1 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 linear_assignment-0.0.1
[INFO] finished frobbing linear_assignment-0.0.1
[INFO] frobbed toml for linear_assignment-0.0.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/linear_assignment/0.0.1/Cargo.toml
[INFO] started frobbing linear_assignment-0.0.1
[INFO] finished frobbing linear_assignment-0.0.1
[INFO] frobbed toml for linear_assignment-0.0.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/linear_assignment/0.0.1/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] [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 linear_assignment-0.0.1 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-0/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/linear_assignment/0.0.1:/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] 8c035829fa70e611293978bf56842c85ab4cc380a0e22789cd868b52684f1ee8
[INFO] running `"docker" "start" "-a" "8c035829fa70e611293978bf56842c85ab4cc380a0e22789cd868b52684f1ee8"`
[INFO] [stderr]    Compiling linear_assignment v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/lib.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `"docker" "inspect" "8c035829fa70e611293978bf56842c85ab4cc380a0e22789cd868b52684f1ee8"`
[INFO] running `"docker" "rm" "-f" "8c035829fa70e611293978bf56842c85ab4cc380a0e22789cd868b52684f1ee8"`
[INFO] [stdout] 8c035829fa70e611293978bf56842c85ab4cc380a0e22789cd868b52684f1ee8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/linear_assignment/0.0.1:/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] d8f785aa5afc5390f82a62f992b8148035c4df5c768b96b762b294921726d0a6
[INFO] running `"docker" "start" "-a" "d8f785aa5afc5390f82a62f992b8148035c4df5c768b96b762b294921726d0a6"`
[INFO] [stderr]    Compiling quickcheck v0.3.2
[INFO] [stderr]    Compiling nalgebra v0.2.23
[INFO] [stderr]    Compiling quickcheck v0.2.27
[INFO] [stderr] error[E0432]: unresolved import `rand::Rand`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.2.23/src/structs/dmat.rs:9:18
[INFO] [stderr]   |
[INFO] [stderr] 9 | use rand::{self, Rand};
[INFO] [stderr]   |                  ^^^^ no `Rand` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::Rand`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.2.23/src/structs/dvec.rs:9:18
[INFO] [stderr]   |
[INFO] [stderr] 9 | use rand::{self, Rand};
[INFO] [stderr]   |                  ^^^^ no `Rand` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::Rand`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.2.23/src/structs/vec.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | use rand::{Rand, Rng};
[INFO] [stderr]    |            ^^^^ no `Rand` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::Rand`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.2.23/src/structs/pnt.rs:10:12
[INFO] [stderr]    |
[INFO] [stderr] 10 | use rand::{Rand, Rng};
[INFO] [stderr]    |            ^^^^ no `Rand` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::Rand`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.2.23/src/structs/quat.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 | use rand::{Rand, Rng};
[INFO] [stderr]   |            ^^^^ no `Rand` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::Rand`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.2.23/src/structs/mat.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 | use rand::{Rand, Rng};
[INFO] [stderr]   |            ^^^^ no `Rand` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::Rand`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.2.23/src/structs/rot.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | use rand::{Rand, Rng};
[INFO] [stderr]   |            ^^^^ no `Rand` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::Rand`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.2.23/src/structs/iso.rs:7:12
[INFO] [stderr]   |
[INFO] [stderr] 7 | use rand::{Rand, Rng};
[INFO] [stderr]   |            ^^^^ no `Rand` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `rand::Rand`
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.2.23/src/structs/spec/vec0.rs:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | use rand::{Rand, Rng};
[INFO] [stderr]   |            ^^^^ no `Rand` in the root
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 9 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `nalgebra`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "d8f785aa5afc5390f82a62f992b8148035c4df5c768b96b762b294921726d0a6"`
[INFO] running `"docker" "rm" "-f" "d8f785aa5afc5390f82a62f992b8148035c4df5c768b96b762b294921726d0a6"`
[INFO] [stdout] d8f785aa5afc5390f82a62f992b8148035c4df5c768b96b762b294921726d0a6