[INFO] updating cached repository MicroJoe/rmatrix
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/MicroJoe/rmatrix
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/MicroJoe/rmatrix" "work/ex/beta-1.38-1/sources/1.37.0/gh/MicroJoe/rmatrix"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/MicroJoe/rmatrix'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/MicroJoe/rmatrix" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/MicroJoe/rmatrix"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/MicroJoe/rmatrix'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 52506714448a41de35353162c64de33266acce43
[INFO] sha for GitHub repo MicroJoe/rmatrix: 52506714448a41de35353162c64de33266acce43
[INFO] validating manifest of MicroJoe/rmatrix 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 MicroJoe/rmatrix 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 MicroJoe/rmatrix
[INFO] finished frobbing MicroJoe/rmatrix
[INFO] frobbed toml for MicroJoe/rmatrix written to work/ex/beta-1.38-1/sources/1.37.0/gh/MicroJoe/rmatrix/Cargo.toml
[INFO] started frobbing MicroJoe/rmatrix
[INFO] finished frobbing MicroJoe/rmatrix
[INFO] frobbed toml for MicroJoe/rmatrix written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/MicroJoe/rmatrix/Cargo.toml
[INFO] crate MicroJoe/rmatrix already has a lockfile, it will not be regenerated
[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 MicroJoe/rmatrix 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/gh/MicroJoe/rmatrix:/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] a1c640959e07167ddc93879c8f3f773bb55765cbecd77f773138600550149ab7
[INFO] running `"docker" "start" "-a" "a1c640959e07167ddc93879c8f3f773bb55765cbecd77f773138600550149ab7"`
[INFO] [stderr]    Compiling rmatrix v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `id`
[INFO] [stderr]   --> src/matrix.rs:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | pub fn id(w: usize) -> Matrix {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `"docker" "inspect" "a1c640959e07167ddc93879c8f3f773bb55765cbecd77f773138600550149ab7"`
[INFO] running `"docker" "rm" "-f" "a1c640959e07167ddc93879c8f3f773bb55765cbecd77f773138600550149ab7"`
[INFO] [stdout] a1c640959e07167ddc93879c8f3f773bb55765cbecd77f773138600550149ab7
[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/gh/MicroJoe/rmatrix:/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] f6846c1c2085c66adcecc766aeb13cfd228b41d26383c6b095ec0a42c38fab80
[INFO] running `"docker" "start" "-a" "f6846c1c2085c66adcecc766aeb13cfd228b41d26383c6b095ec0a42c38fab80"`
[INFO] [stderr]    Compiling rmatrix v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "f6846c1c2085c66adcecc766aeb13cfd228b41d26383c6b095ec0a42c38fab80"`
[INFO] running `"docker" "rm" "-f" "f6846c1c2085c66adcecc766aeb13cfd228b41d26383c6b095ec0a42c38fab80"`
[INFO] [stdout] f6846c1c2085c66adcecc766aeb13cfd228b41d26383c6b095ec0a42c38fab80
[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/gh/MicroJoe/rmatrix:/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"`
[INFO] [stdout] aa3ad65472ad5efedb136fe58dca2ddbddb9f3e1f773b2a5ef2faad8eb88d09d
[INFO] running `"docker" "start" "-a" "aa3ad65472ad5efedb136fe58dca2ddbddb9f3e1f773b2a5ef2faad8eb88d09d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rmatrix-0525dfa5ce72fd41
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test matrix::test_mult_id ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "aa3ad65472ad5efedb136fe58dca2ddbddb9f3e1f773b2a5ef2faad8eb88d09d"`
[INFO] running `"docker" "rm" "-f" "aa3ad65472ad5efedb136fe58dca2ddbddb9f3e1f773b2a5ef2faad8eb88d09d"`
[INFO] [stdout] aa3ad65472ad5efedb136fe58dca2ddbddb9f3e1f773b2a5ef2faad8eb88d09d