[INFO] updating cached repository dkilmer/letter_boxed_solver
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dkilmer/letter_boxed_solver
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dkilmer/letter_boxed_solver" "work/ex/beta-1.38-1/sources/1.37.0/gh/dkilmer/letter_boxed_solver"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/dkilmer/letter_boxed_solver'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dkilmer/letter_boxed_solver" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dkilmer/letter_boxed_solver"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dkilmer/letter_boxed_solver'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5391888f59dbe120b57b7e99256d08bc949f9771
[INFO] sha for GitHub repo dkilmer/letter_boxed_solver: 5391888f59dbe120b57b7e99256d08bc949f9771
[INFO] validating manifest of dkilmer/letter_boxed_solver 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 dkilmer/letter_boxed_solver 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 dkilmer/letter_boxed_solver
[INFO] finished frobbing dkilmer/letter_boxed_solver
[INFO] frobbed toml for dkilmer/letter_boxed_solver written to work/ex/beta-1.38-1/sources/1.37.0/gh/dkilmer/letter_boxed_solver/Cargo.toml
[INFO] started frobbing dkilmer/letter_boxed_solver
[INFO] finished frobbing dkilmer/letter_boxed_solver
[INFO] frobbed toml for dkilmer/letter_boxed_solver written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dkilmer/letter_boxed_solver/Cargo.toml
[INFO] crate dkilmer/letter_boxed_solver 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 dkilmer/letter_boxed_solver 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/dkilmer/letter_boxed_solver:/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] 2cdb8b460b7542c62e90cea99ec565605d989381c75803a2d461ad217f0f15f2
[INFO] running `"docker" "start" "-a" "2cdb8b460b7542c62e90cea99ec565605d989381c75803a2d461ad217f0f15f2"`
[INFO] [stderr]    Compiling letter_boxed_solver v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `"docker" "inspect" "2cdb8b460b7542c62e90cea99ec565605d989381c75803a2d461ad217f0f15f2"`
[INFO] running `"docker" "rm" "-f" "2cdb8b460b7542c62e90cea99ec565605d989381c75803a2d461ad217f0f15f2"`
[INFO] [stdout] 2cdb8b460b7542c62e90cea99ec565605d989381c75803a2d461ad217f0f15f2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/dkilmer/letter_boxed_solver:/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] fe20861e38a82fdf7331e20b1b3ae121f8dc8d943f1dc9fe34f8cc504b321571
[INFO] running `"docker" "start" "-a" "fe20861e38a82fdf7331e20b1b3ae121f8dc8d943f1dc9fe34f8cc504b321571"`
[INFO] [stderr]    Compiling letter_boxed_solver v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `"docker" "inspect" "fe20861e38a82fdf7331e20b1b3ae121f8dc8d943f1dc9fe34f8cc504b321571"`
[INFO] running `"docker" "rm" "-f" "fe20861e38a82fdf7331e20b1b3ae121f8dc8d943f1dc9fe34f8cc504b321571"`
[INFO] [stdout] fe20861e38a82fdf7331e20b1b3ae121f8dc8d943f1dc9fe34f8cc504b321571
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/dkilmer/letter_boxed_solver:/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] c8352eacc9b4c778138e2b4a93198402aff039cc6000ddb1c95b7e14e43d4094
[INFO] running `"docker" "start" "-a" "c8352eacc9b4c778138e2b4a93198402aff039cc6000ddb1c95b7e14e43d4094"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/letter_boxed_solver-aca99841e7a4a846
[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" "c8352eacc9b4c778138e2b4a93198402aff039cc6000ddb1c95b7e14e43d4094"`
[INFO] running `"docker" "rm" "-f" "c8352eacc9b4c778138e2b4a93198402aff039cc6000ddb1c95b7e14e43d4094"`
[INFO] [stdout] c8352eacc9b4c778138e2b4a93198402aff039cc6000ddb1c95b7e14e43d4094