[INFO] updating cached repository dihedral-codes/rust-rref-binary
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dihedral-codes/rust-rref-binary
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dihedral-codes/rust-rref-binary" "work/ex/beta-1.38-1/sources/1.37.0/gh/dihedral-codes/rust-rref-binary"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/dihedral-codes/rust-rref-binary'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dihedral-codes/rust-rref-binary" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dihedral-codes/rust-rref-binary"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dihedral-codes/rust-rref-binary'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a5ca8a0906ecbacb3a6c8abec67f627658912f67
[INFO] sha for GitHub repo dihedral-codes/rust-rref-binary: a5ca8a0906ecbacb3a6c8abec67f627658912f67
[INFO] validating manifest of dihedral-codes/rust-rref-binary 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 dihedral-codes/rust-rref-binary 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 dihedral-codes/rust-rref-binary
[INFO] finished frobbing dihedral-codes/rust-rref-binary
[INFO] frobbed toml for dihedral-codes/rust-rref-binary written to work/ex/beta-1.38-1/sources/1.37.0/gh/dihedral-codes/rust-rref-binary/Cargo.toml
[INFO] started frobbing dihedral-codes/rust-rref-binary
[INFO] finished frobbing dihedral-codes/rust-rref-binary
[INFO] frobbed toml for dihedral-codes/rust-rref-binary written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dihedral-codes/rust-rref-binary/Cargo.toml
[INFO] crate dihedral-codes/rust-rref-binary 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 dihedral-codes/rust-rref-binary 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-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dihedral-codes/rust-rref-binary:/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] f05af125bb2ace38293cfcfc82b519880af9c0a8e6473a87ceac9fbb9ae1430f
[INFO] running `"docker" "start" "-a" "f05af125bb2ace38293cfcfc82b519880af9c0a8e6473a87ceac9fbb9ae1430f"`
[INFO] [stderr]    Compiling rust-rref-binary v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `printmat`
[INFO] [stderr]   --> src/main.rs:64:1
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn printmat(matrix:[u64; N]) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `"docker" "inspect" "f05af125bb2ace38293cfcfc82b519880af9c0a8e6473a87ceac9fbb9ae1430f"`
[INFO] running `"docker" "rm" "-f" "f05af125bb2ace38293cfcfc82b519880af9c0a8e6473a87ceac9fbb9ae1430f"`
[INFO] [stdout] f05af125bb2ace38293cfcfc82b519880af9c0a8e6473a87ceac9fbb9ae1430f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dihedral-codes/rust-rref-binary:/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] a6a3644e0321b61262d5e995a6d4f957f7437e9d2b5c74a47f6c5ea5b2f0bb73
[INFO] running `"docker" "start" "-a" "a6a3644e0321b61262d5e995a6d4f957f7437e9d2b5c74a47f6c5ea5b2f0bb73"`
[INFO] [stderr]    Compiling rust-rref-binary v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `printmat`
[INFO] [stderr]   --> src/main.rs:64:1
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn printmat(matrix:[u64; N]) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `"docker" "inspect" "a6a3644e0321b61262d5e995a6d4f957f7437e9d2b5c74a47f6c5ea5b2f0bb73"`
[INFO] running `"docker" "rm" "-f" "a6a3644e0321b61262d5e995a6d4f957f7437e9d2b5c74a47f6c5ea5b2f0bb73"`
[INFO] [stdout] a6a3644e0321b61262d5e995a6d4f957f7437e9d2b5c74a47f6c5ea5b2f0bb73
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dihedral-codes/rust-rref-binary:/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"`
[INFO] [stdout] d873608b53eca813e1c12d4d0a85048ca4759414df1a8e645ffc2032c21ea0a2
[INFO] running `"docker" "start" "-a" "d873608b53eca813e1c12d4d0a85048ca4759414df1a8e645ffc2032c21ea0a2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_rref_binary-c1ffd5a3f85308d8
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "d873608b53eca813e1c12d4d0a85048ca4759414df1a8e645ffc2032c21ea0a2"`
[INFO] running `"docker" "rm" "-f" "d873608b53eca813e1c12d4d0a85048ca4759414df1a8e645ffc2032c21ea0a2"`
[INFO] [stdout] d873608b53eca813e1c12d4d0a85048ca4759414df1a8e645ffc2032c21ea0a2