[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-1.37-6/sources/1.36.0/gh/howeih/Day-58-Integer-Exponentiation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/gh/howeih/Day-58-Integer-Exponentiation"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of howeih/Day-58-Integer-Exponentiation on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing howeih/Day-58-Integer-Exponentiation against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] b7b4824de181eace0a8d2450f3c246a2f23bc38cc20827a7397d5cded6e54cb3
[INFO] running `"docker" "start" "-a" "b7b4824de181eace0a8d2450f3c246a2f23bc38cc20827a7397d5cded6e54cb3"`
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling integer_exponentiation v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.76s
[INFO] running `"docker" "inspect" "b7b4824de181eace0a8d2450f3c246a2f23bc38cc20827a7397d5cded6e54cb3"`
[INFO] running `"docker" "rm" "-f" "b7b4824de181eace0a8d2450f3c246a2f23bc38cc20827a7397d5cded6e54cb3"`
[INFO] [stdout] b7b4824de181eace0a8d2450f3c246a2f23bc38cc20827a7397d5cded6e54cb3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0bfae94be9a9ff63e10937ee22d179caf78ee604d6acbfe87688a10c3292e032
[INFO] running `"docker" "start" "-a" "0bfae94be9a9ff63e10937ee22d179caf78ee604d6acbfe87688a10c3292e032"`
[INFO] [stderr]    Compiling integer_exponentiation v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `"docker" "inspect" "0bfae94be9a9ff63e10937ee22d179caf78ee604d6acbfe87688a10c3292e032"`
[INFO] running `"docker" "rm" "-f" "0bfae94be9a9ff63e10937ee22d179caf78ee604d6acbfe87688a10c3292e032"`
[INFO] [stdout] 0bfae94be9a9ff63e10937ee22d179caf78ee604d6acbfe87688a10c3292e032
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 607c04edfdc9170898e05199ac289fa40e4e53df968851fe1a9f31ae888f6bbc
[INFO] running `"docker" "start" "-a" "607c04edfdc9170898e05199ac289fa40e4e53df968851fe1a9f31ae888f6bbc"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/integer_exponentiation-8bdf4eb0ad6fac24
[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" "607c04edfdc9170898e05199ac289fa40e4e53df968851fe1a9f31ae888f6bbc"`
[INFO] running `"docker" "rm" "-f" "607c04edfdc9170898e05199ac289fa40e4e53df968851fe1a9f31ae888f6bbc"`
[INFO] [stdout] 607c04edfdc9170898e05199ac289fa40e4e53df968851fe1a9f31ae888f6bbc