[INFO] updating cached repository dcoxall/maze
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dcoxall/maze
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dcoxall/maze" "work/ex/beta-1.38-1/sources/1.37.0/gh/dcoxall/maze"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/dcoxall/maze'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dcoxall/maze" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dcoxall/maze"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dcoxall/maze'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7938ae86ac3e6239f3dc42b1a88e704f9ffc24c7
[INFO] sha for GitHub repo dcoxall/maze: 7938ae86ac3e6239f3dc42b1a88e704f9ffc24c7
[INFO] validating manifest of dcoxall/maze 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 dcoxall/maze 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 dcoxall/maze
[INFO] finished frobbing dcoxall/maze
[INFO] frobbed toml for dcoxall/maze written to work/ex/beta-1.38-1/sources/1.37.0/gh/dcoxall/maze/Cargo.toml
[INFO] started frobbing dcoxall/maze
[INFO] finished frobbing dcoxall/maze
[INFO] frobbed toml for dcoxall/maze written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dcoxall/maze/Cargo.toml
[INFO] crate dcoxall/maze 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 dcoxall/maze 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-5/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/dcoxall/maze:/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] bf73df47f2a3a5ce80953e34235e963e5d0b2bf15620a91ec48922a0f0e77896
[INFO] running `"docker" "start" "-a" "bf73df47f2a3a5ce80953e34235e963e5d0b2bf15620a91ec48922a0f0e77896"`
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling maze v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:37:19
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let maze: Box<Iterator<Item=Grid>> = match m.value_of("algorithm") {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Grid>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.39s
[INFO] running `"docker" "inspect" "bf73df47f2a3a5ce80953e34235e963e5d0b2bf15620a91ec48922a0f0e77896"`
[INFO] running `"docker" "rm" "-f" "bf73df47f2a3a5ce80953e34235e963e5d0b2bf15620a91ec48922a0f0e77896"`
[INFO] [stdout] bf73df47f2a3a5ce80953e34235e963e5d0b2bf15620a91ec48922a0f0e77896
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/dcoxall/maze:/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] d365a539f48b01b81472a93b208a1dac9e697a4cd5c5ea7dd8d78519e7bc61e2
[INFO] running `"docker" "start" "-a" "d365a539f48b01b81472a93b208a1dac9e697a4cd5c5ea7dd8d78519e7bc61e2"`
[INFO] [stderr]    Compiling maze v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:37:19
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let maze: Box<Iterator<Item=Grid>> = match m.value_of("algorithm") {
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=Grid>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "d365a539f48b01b81472a93b208a1dac9e697a4cd5c5ea7dd8d78519e7bc61e2"`
[INFO] running `"docker" "rm" "-f" "d365a539f48b01b81472a93b208a1dac9e697a4cd5c5ea7dd8d78519e7bc61e2"`
[INFO] [stdout] d365a539f48b01b81472a93b208a1dac9e697a4cd5c5ea7dd8d78519e7bc61e2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/dcoxall/maze:/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] bd2dffe59966f2c55ac6cbb1b366202be4d5a277d5cb288e215620f0c3f39eb6
[INFO] running `"docker" "start" "-a" "bd2dffe59966f2c55ac6cbb1b366202be4d5a277d5cb288e215620f0c3f39eb6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/maze-cc2b2be4f680f870
[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" "bd2dffe59966f2c55ac6cbb1b366202be4d5a277d5cb288e215620f0c3f39eb6"`
[INFO] running `"docker" "rm" "-f" "bd2dffe59966f2c55ac6cbb1b366202be4d5a277d5cb288e215620f0c3f39eb6"`
[INFO] [stdout] bd2dffe59966f2c55ac6cbb1b366202be4d5a277d5cb288e215620f0c3f39eb6