[INFO] updating cached repository stefanholzmueller/rust-calculator
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/stefanholzmueller/rust-calculator
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/stefanholzmueller/rust-calculator" "work/ex/beta-1.38-1/sources/1.37.0/gh/stefanholzmueller/rust-calculator"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/stefanholzmueller/rust-calculator'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/stefanholzmueller/rust-calculator" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/stefanholzmueller/rust-calculator"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/stefanholzmueller/rust-calculator'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d87cbaba6826c023bd003ee3e25f9ebc246247fa
[INFO] sha for GitHub repo stefanholzmueller/rust-calculator: d87cbaba6826c023bd003ee3e25f9ebc246247fa
[INFO] validating manifest of stefanholzmueller/rust-calculator 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 stefanholzmueller/rust-calculator 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 stefanholzmueller/rust-calculator
[INFO] finished frobbing stefanholzmueller/rust-calculator
[INFO] frobbed toml for stefanholzmueller/rust-calculator written to work/ex/beta-1.38-1/sources/1.37.0/gh/stefanholzmueller/rust-calculator/Cargo.toml
[INFO] started frobbing stefanholzmueller/rust-calculator
[INFO] finished frobbing stefanholzmueller/rust-calculator
[INFO] frobbed toml for stefanholzmueller/rust-calculator written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/stefanholzmueller/rust-calculator/Cargo.toml
[INFO] crate stefanholzmueller/rust-calculator 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 stefanholzmueller/rust-calculator 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/stefanholzmueller/rust-calculator:/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] 88b700660ca646a87fded483694e2118a9b1497d47893d52bf1eb913d50c3166
[INFO] running `"docker" "start" "-a" "88b700660ca646a87fded483694e2118a9b1497d47893d52bf1eb913d50c3166"`
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]    Compiling rust-calculator v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.98s
[INFO] running `"docker" "inspect" "88b700660ca646a87fded483694e2118a9b1497d47893d52bf1eb913d50c3166"`
[INFO] running `"docker" "rm" "-f" "88b700660ca646a87fded483694e2118a9b1497d47893d52bf1eb913d50c3166"`
[INFO] [stdout] 88b700660ca646a87fded483694e2118a9b1497d47893d52bf1eb913d50c3166
[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/stefanholzmueller/rust-calculator:/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] 96db8c85da2232cc8995e4de98d026b8d59b47da4e2c9c7cb11cb2e091f58b2f
[INFO] running `"docker" "start" "-a" "96db8c85da2232cc8995e4de98d026b8d59b47da4e2c9c7cb11cb2e091f58b2f"`
[INFO] [stderr]    Compiling rust-calculator v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `"docker" "inspect" "96db8c85da2232cc8995e4de98d026b8d59b47da4e2c9c7cb11cb2e091f58b2f"`
[INFO] running `"docker" "rm" "-f" "96db8c85da2232cc8995e4de98d026b8d59b47da4e2c9c7cb11cb2e091f58b2f"`
[INFO] [stdout] 96db8c85da2232cc8995e4de98d026b8d59b47da4e2c9c7cb11cb2e091f58b2f
[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/stefanholzmueller/rust-calculator:/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] 008b13fd51952f8f164d999579a96fc1e57bf33a321b35d1ce70aa4ab5f30bfe
[INFO] running `"docker" "start" "-a" "008b13fd51952f8f164d999579a96fc1e57bf33a321b35d1ce70aa4ab5f30bfe"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_calculator-6338cd79117c51a8
[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" "008b13fd51952f8f164d999579a96fc1e57bf33a321b35d1ce70aa4ab5f30bfe"`
[INFO] running `"docker" "rm" "-f" "008b13fd51952f8f164d999579a96fc1e57bf33a321b35d1ce70aa4ab5f30bfe"`
[INFO] [stdout] 008b13fd51952f8f164d999579a96fc1e57bf33a321b35d1ce70aa4ab5f30bfe