[INFO] updating cached repository ElectricCoffee/city_generator
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ElectricCoffee/city_generator
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ElectricCoffee/city_generator" "work/ex/beta-1.38-1/sources/1.37.0/gh/ElectricCoffee/city_generator"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ElectricCoffee/city_generator'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ElectricCoffee/city_generator" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ElectricCoffee/city_generator"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ElectricCoffee/city_generator'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cf2a31e74bc5cf52d8d5c9907e5ac79bf1799e4c
[INFO] sha for GitHub repo ElectricCoffee/city_generator: cf2a31e74bc5cf52d8d5c9907e5ac79bf1799e4c
[INFO] validating manifest of ElectricCoffee/city_generator 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 ElectricCoffee/city_generator 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 ElectricCoffee/city_generator
[INFO] finished frobbing ElectricCoffee/city_generator
[INFO] frobbed toml for ElectricCoffee/city_generator written to work/ex/beta-1.38-1/sources/1.37.0/gh/ElectricCoffee/city_generator/Cargo.toml
[INFO] started frobbing ElectricCoffee/city_generator
[INFO] finished frobbing ElectricCoffee/city_generator
[INFO] frobbed toml for ElectricCoffee/city_generator written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ElectricCoffee/city_generator/Cargo.toml
[INFO] crate ElectricCoffee/city_generator 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 ElectricCoffee/city_generator 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-1/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/ElectricCoffee/city_generator:/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] dd0ed6c475fcb1faa844d627a26ec06db0aae06d0da776ef59b540fffd3f3ced
[INFO] running `"docker" "start" "-a" "dd0ed6c475fcb1faa844d627a26ec06db0aae06d0da776ef59b540fffd3f3ced"`
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]    Compiling serde v1.0.60
[INFO] [stderr]    Compiling rustc-demangle v0.1.8
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling serde_derive v1.0.60
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.23
[INFO] [stderr]    Compiling backtrace v0.3.8
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling serde_json v1.0.17
[INFO] [stderr]    Compiling city_generator v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `generate_random`
[INFO] [stderr]   --> src/data.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn generate_random(&self) -> Result<String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.03s
[INFO] running `"docker" "inspect" "dd0ed6c475fcb1faa844d627a26ec06db0aae06d0da776ef59b540fffd3f3ced"`
[INFO] running `"docker" "rm" "-f" "dd0ed6c475fcb1faa844d627a26ec06db0aae06d0da776ef59b540fffd3f3ced"`
[INFO] [stdout] dd0ed6c475fcb1faa844d627a26ec06db0aae06d0da776ef59b540fffd3f3ced
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/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/ElectricCoffee/city_generator:/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] 0c1fc95517a72a32f36164e1ddfb81c6bdccca9558ef81a238a75d1e56fe42e6
[INFO] running `"docker" "start" "-a" "0c1fc95517a72a32f36164e1ddfb81c6bdccca9558ef81a238a75d1e56fe42e6"`
[INFO] [stderr]    Compiling city_generator v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `generate_random`
[INFO] [stderr]   --> src/data.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn generate_random(&self) -> Result<String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `"docker" "inspect" "0c1fc95517a72a32f36164e1ddfb81c6bdccca9558ef81a238a75d1e56fe42e6"`
[INFO] running `"docker" "rm" "-f" "0c1fc95517a72a32f36164e1ddfb81c6bdccca9558ef81a238a75d1e56fe42e6"`
[INFO] [stdout] 0c1fc95517a72a32f36164e1ddfb81c6bdccca9558ef81a238a75d1e56fe42e6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/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/ElectricCoffee/city_generator:/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] 0200ae46acd7d22ae54bf5ea39591a4e30032e5349163af0a75cc0037bae2c93
[INFO] running `"docker" "start" "-a" "0200ae46acd7d22ae54bf5ea39591a4e30032e5349163af0a75cc0037bae2c93"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/city_generator-f7c4da533a6db698
[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" "0200ae46acd7d22ae54bf5ea39591a4e30032e5349163af0a75cc0037bae2c93"`
[INFO] running `"docker" "rm" "-f" "0200ae46acd7d22ae54bf5ea39591a4e30032e5349163af0a75cc0037bae2c93"`
[INFO] [stdout] 0200ae46acd7d22ae54bf5ea39591a4e30032e5349163af0a75cc0037bae2c93