[INFO] updating cached repository MattsPoche/Matrix-transformation
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/MattsPoche/Matrix-transformation
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/MattsPoche/Matrix-transformation" "work/ex/beta-1.37-6/sources/1.36.0/gh/MattsPoche/Matrix-transformation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/MattsPoche/Matrix-transformation'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/MattsPoche/Matrix-transformation" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/MattsPoche/Matrix-transformation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/MattsPoche/Matrix-transformation'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3643ab1e3986ac405588e77203f451f9bf186b11
[INFO] sha for GitHub repo MattsPoche/Matrix-transformation: 3643ab1e3986ac405588e77203f451f9bf186b11
[INFO] validating manifest of MattsPoche/Matrix-transformation 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 MattsPoche/Matrix-transformation 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 MattsPoche/Matrix-transformation
[INFO] finished frobbing MattsPoche/Matrix-transformation
[INFO] frobbed toml for MattsPoche/Matrix-transformation written to work/ex/beta-1.37-6/sources/1.36.0/gh/MattsPoche/Matrix-transformation/Cargo.toml
[INFO] started frobbing MattsPoche/Matrix-transformation
[INFO] finished frobbing MattsPoche/Matrix-transformation
[INFO] frobbed toml for MattsPoche/Matrix-transformation written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/MattsPoche/Matrix-transformation/Cargo.toml
[INFO] crate MattsPoche/Matrix-transformation already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing MattsPoche/Matrix-transformation 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-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/MattsPoche/Matrix-transformation:/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] 396c95e3494933c8de101b243fa095d173bc0e894156de653ccf0f4a4139e694
[INFO] running `"docker" "start" "-a" "396c95e3494933c8de101b243fa095d173bc0e894156de653ccf0f4a4139e694"`
[INFO] [stderr]    Compiling matrix_transformation v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `y_ubound`
[INFO] [stderr]  --> src/main.rs:3:20
[INFO] [stderr]   |
[INFO] [stderr] 3 |     let (x_ubound, y_ubound) = get_bounds(v);
[INFO] [stderr]   |                    ^^^^^^^^ help: consider prefixing with an underscore: `_y_ubound`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `matricize`
[INFO] [stderr]   --> src/main.rs:44:1
[INFO] [stderr]    |
[INFO] [stderr] 44 | fn matricize(v: &Vec<(usize, usize)>) -> Vec<Vec<u16>> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_matrix`
[INFO] [stderr]   --> src/main.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | fn print_matrix(m: &Vec<Vec<u16>>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.10s
[INFO] running `"docker" "inspect" "396c95e3494933c8de101b243fa095d173bc0e894156de653ccf0f4a4139e694"`
[INFO] running `"docker" "rm" "-f" "396c95e3494933c8de101b243fa095d173bc0e894156de653ccf0f4a4139e694"`
[INFO] [stdout] 396c95e3494933c8de101b243fa095d173bc0e894156de653ccf0f4a4139e694
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/MattsPoche/Matrix-transformation:/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] 8c8322c82f1342708fc5d112d7082fafdf5533255b4919c3a2087cc1472430be
[INFO] running `"docker" "start" "-a" "8c8322c82f1342708fc5d112d7082fafdf5533255b4919c3a2087cc1472430be"`
[INFO] [stderr]    Compiling matrix_transformation v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `y_ubound`
[INFO] [stderr]  --> src/main.rs:3:20
[INFO] [stderr]   |
[INFO] [stderr] 3 |     let (x_ubound, y_ubound) = get_bounds(v);
[INFO] [stderr]   |                    ^^^^^^^^ help: consider prefixing with an underscore: `_y_ubound`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.33s
[INFO] running `"docker" "inspect" "8c8322c82f1342708fc5d112d7082fafdf5533255b4919c3a2087cc1472430be"`
[INFO] running `"docker" "rm" "-f" "8c8322c82f1342708fc5d112d7082fafdf5533255b4919c3a2087cc1472430be"`
[INFO] [stdout] 8c8322c82f1342708fc5d112d7082fafdf5533255b4919c3a2087cc1472430be
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/MattsPoche/Matrix-transformation:/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"`
[INFO] [stdout] 57a32c1635c86bf2cb8bdbd1045cc47b94f87204db37815fbd7fd66fc3f75636
[INFO] running `"docker" "start" "-a" "57a32c1635c86bf2cb8bdbd1045cc47b94f87204db37815fbd7fd66fc3f75636"`
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stdout] running 2 tests
[INFO] [stderr]      Running /opt/crater/target/debug/deps/matrix_transformation-e32bcc28755d051b
[INFO] [stdout] test test_matricize ... ok
[INFO] [stdout] test test_ubounds ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "57a32c1635c86bf2cb8bdbd1045cc47b94f87204db37815fbd7fd66fc3f75636"`
[INFO] running `"docker" "rm" "-f" "57a32c1635c86bf2cb8bdbd1045cc47b94f87204db37815fbd7fd66fc3f75636"`
[INFO] [stdout] 57a32c1635c86bf2cb8bdbd1045cc47b94f87204db37815fbd7fd66fc3f75636