[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 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 6d8764bb786b7955ae72b7c682d2a93882f1f34c04aeab4c49978d3a36b35e85
[INFO] running `"docker" "start" "-a" "6d8764bb786b7955ae72b7c682d2a93882f1f34c04aeab4c49978d3a36b35e85"`
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling rand_core v0.4.0
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[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 8.90s
[INFO] running `"docker" "inspect" "6d8764bb786b7955ae72b7c682d2a93882f1f34c04aeab4c49978d3a36b35e85"`
[INFO] running `"docker" "rm" "-f" "6d8764bb786b7955ae72b7c682d2a93882f1f34c04aeab4c49978d3a36b35e85"`
[INFO] [stdout] 6d8764bb786b7955ae72b7c682d2a93882f1f34c04aeab4c49978d3a36b35e85
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4998fa51b2dbab6b8c4ac1e2475cee66d032319e43df6a798089bfdb69e628c8
[INFO] running `"docker" "start" "-a" "4998fa51b2dbab6b8c4ac1e2475cee66d032319e43df6a798089bfdb69e628c8"`
[INFO] [stderr]    Compiling integer_exponentiation v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `"docker" "inspect" "4998fa51b2dbab6b8c4ac1e2475cee66d032319e43df6a798089bfdb69e628c8"`
[INFO] running `"docker" "rm" "-f" "4998fa51b2dbab6b8c4ac1e2475cee66d032319e43df6a798089bfdb69e628c8"`
[INFO] [stdout] 4998fa51b2dbab6b8c4ac1e2475cee66d032319e43df6a798089bfdb69e628c8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 8797ef7bfb1a73df32471ae60effd3381c7cd265bea738529a2aa48236eeac38
[INFO] running `"docker" "start" "-a" "8797ef7bfb1a73df32471ae60effd3381c7cd265bea738529a2aa48236eeac38"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/integer_exponentiation-e4b07ce1b6744a12
[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" "8797ef7bfb1a73df32471ae60effd3381c7cd265bea738529a2aa48236eeac38"`
[INFO] running `"docker" "rm" "-f" "8797ef7bfb1a73df32471ae60effd3381c7cd265bea738529a2aa48236eeac38"`
[INFO] [stdout] 8797ef7bfb1a73df32471ae60effd3381c7cd265bea738529a2aa48236eeac38