[INFO] updating cached repository howeih/Day-58-Integer-Exponentiation
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/howeih/Day-58-Integer-Exponentiation
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/howeih/Day-58-Integer-Exponentiation" "work/ex/beta-1.38-1/sources/1.37.0/gh/howeih/Day-58-Integer-Exponentiation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/howeih/Day-58-Integer-Exponentiation'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/howeih/Day-58-Integer-Exponentiation" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/howeih/Day-58-Integer-Exponentiation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/howeih/Day-58-Integer-Exponentiation'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 13424c73f5f4c054beeb934e6ab7ecc79d3d0aa6
[INFO] sha for GitHub repo howeih/Day-58-Integer-Exponentiation: 13424c73f5f4c054beeb934e6ab7ecc79d3d0aa6
[INFO] validating manifest of howeih/Day-58-Integer-Exponentiation 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 howeih/Day-58-Integer-Exponentiation 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 howeih/Day-58-Integer-Exponentiation
[INFO] finished frobbing howeih/Day-58-Integer-Exponentiation
[INFO] frobbed toml for howeih/Day-58-Integer-Exponentiation written to work/ex/beta-1.38-1/sources/1.37.0/gh/howeih/Day-58-Integer-Exponentiation/Cargo.toml
[INFO] started frobbing howeih/Day-58-Integer-Exponentiation
[INFO] finished frobbing howeih/Day-58-Integer-Exponentiation
[INFO] frobbed toml for howeih/Day-58-Integer-Exponentiation written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/howeih/Day-58-Integer-Exponentiation/Cargo.toml
[INFO] crate howeih/Day-58-Integer-Exponentiation 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 howeih/Day-58-Integer-Exponentiation 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/howeih/Day-58-Integer-Exponentiation:/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] 3ded9d05ac57cd72f54991fcd890f3ebadd6e3248894613a319879ef45e5d7a3
[INFO] running `"docker" "start" "-a" "3ded9d05ac57cd72f54991fcd890f3ebadd6e3248894613a319879ef45e5d7a3"`
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling integer_exponentiation v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.88s
[INFO] running `"docker" "inspect" "3ded9d05ac57cd72f54991fcd890f3ebadd6e3248894613a319879ef45e5d7a3"`
[INFO] running `"docker" "rm" "-f" "3ded9d05ac57cd72f54991fcd890f3ebadd6e3248894613a319879ef45e5d7a3"`
[INFO] [stdout] 3ded9d05ac57cd72f54991fcd890f3ebadd6e3248894613a319879ef45e5d7a3
[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/howeih/Day-58-Integer-Exponentiation:/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] 0438714718ad385ffe747298961e301fb9efd772b67b1e513247840e197312ea
[INFO] running `"docker" "start" "-a" "0438714718ad385ffe747298961e301fb9efd772b67b1e513247840e197312ea"`
[INFO] [stderr]    Compiling integer_exponentiation v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "0438714718ad385ffe747298961e301fb9efd772b67b1e513247840e197312ea"`
[INFO] running `"docker" "rm" "-f" "0438714718ad385ffe747298961e301fb9efd772b67b1e513247840e197312ea"`
[INFO] [stdout] 0438714718ad385ffe747298961e301fb9efd772b67b1e513247840e197312ea
[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/howeih/Day-58-Integer-Exponentiation:/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] ac55826faddef12158428c201d54bb76da52c22817044c98268c53f3edfb8aac
[INFO] running `"docker" "start" "-a" "ac55826faddef12158428c201d54bb76da52c22817044c98268c53f3edfb8aac"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/integer_exponentiation-d34970f89b513010
[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" "ac55826faddef12158428c201d54bb76da52c22817044c98268c53f3edfb8aac"`
[INFO] running `"docker" "rm" "-f" "ac55826faddef12158428c201d54bb76da52c22817044c98268c53f3edfb8aac"`
[INFO] [stdout] ac55826faddef12158428c201d54bb76da52c22817044c98268c53f3edfb8aac