[INFO] fetching crate civil 0.1.7...
[INFO] extracting crate civil 0.1.7 into work/ex/beta-1.37-6/sources/1.36.0/reg/civil/0.1.7
[INFO] extracting crate civil 0.1.7 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/civil/0.1.7
[INFO] validating manifest of civil-0.1.7 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of civil-0.1.7 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing civil-0.1.7
[INFO] finished frobbing civil-0.1.7
[INFO] frobbed toml for civil-0.1.7 written to work/ex/beta-1.37-6/sources/1.36.0/reg/civil/0.1.7/Cargo.toml
[INFO] started frobbing civil-0.1.7
[INFO] finished frobbing civil-0.1.7
[INFO] frobbed toml for civil-0.1.7 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/civil/0.1.7/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing civil-0.1.7 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/civil/0.1.7:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] dd85cb647736eb3462520d296d407a3175b425a2df5074e34256c19f4151c469
[INFO] running `"docker" "start" "-a" "dd85cb647736eb3462520d296d407a3175b425a2df5074e34256c19f4151c469"`
[INFO] [stderr]    Compiling civil v0.1.7 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `augmented_matrix`
[INFO] [stderr]   --> src/calc/gaussjordan.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let mut augmented_matrix: Vec<Vec<f64>>;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_augmented_matrix`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `combined`
[INFO] [stderr]   --> src/calc/gaussjordan.rs:20:13
[INFO] [stderr]    |
[INFO] [stderr] 20 |         let combined = dbg!(tmp.append(&mut the_unit));
[INFO] [stderr]    |             ^^^^^^^^ help: consider prefixing with an underscore: `_combined`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gauss_jordan_elimination`
[INFO] [stderr]  --> src/calc/gaussjordan.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn gauss_jordan_elimination(matrix:Vec<Vec<f64>>) -> Vec<Vec<f64>> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.17s
[INFO] running `"docker" "inspect" "dd85cb647736eb3462520d296d407a3175b425a2df5074e34256c19f4151c469"`
[INFO] running `"docker" "rm" "-f" "dd85cb647736eb3462520d296d407a3175b425a2df5074e34256c19f4151c469"`
[INFO] [stdout] dd85cb647736eb3462520d296d407a3175b425a2df5074e34256c19f4151c469
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/civil/0.1.7:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4c3267fb26f322b31ac606ed3e27b6bc1b0dcd53ac36156a6da236c56719c8b0
[INFO] running `"docker" "start" "-a" "4c3267fb26f322b31ac606ed3e27b6bc1b0dcd53ac36156a6da236c56719c8b0"`
[INFO] [stderr]    Compiling civil v0.1.7 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `crate::gauss_jordan_elimination`
[INFO] [stderr]   --> src/calc/gaussjordan.rs:52:5
[INFO] [stderr]    |
[INFO] [stderr] 52 | use crate::gauss_jordan_elimination;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no `gauss_jordan_elimination` in the root
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `civil`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "4c3267fb26f322b31ac606ed3e27b6bc1b0dcd53ac36156a6da236c56719c8b0"`
[INFO] running `"docker" "rm" "-f" "4c3267fb26f322b31ac606ed3e27b6bc1b0dcd53ac36156a6da236c56719c8b0"`
[INFO] [stdout] 4c3267fb26f322b31ac606ed3e27b6bc1b0dcd53ac36156a6da236c56719c8b0