[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-1.37-6/sources/1.36.0/gh/ElectricCoffee/city_generator"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/ElectricCoffee/city_generator'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ElectricCoffee/city_generator" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ElectricCoffee/city_generator"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ElectricCoffee/city_generator 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 ElectricCoffee/city_generator
[INFO] finished frobbing ElectricCoffee/city_generator
[INFO] frobbed toml for ElectricCoffee/city_generator written to work/ex/beta-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "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 ElectricCoffee/city_generator against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 57142b99f93828ab7bb0d880b02dc847b8a34c8fbd5d710cdd5a49a09a1e540f
[INFO] running `"docker" "start" "-a" "57142b99f93828ab7bb0d880b02dc847b8a34c8fbd5d710cdd5a49a09a1e540f"`
[INFO] [stderr]    Compiling serde v1.0.60
[INFO] [stderr]    Compiling libc v0.2.41
[INFO] [stderr]    Compiling rustc-demangle v0.1.8
[INFO] [stderr]    Compiling rand_core v0.2.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.23
[INFO] [stderr]    Compiling quote v0.6.2
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling syn v0.14.0
[INFO] [stderr]    Compiling rand v0.5.0
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]    Compiling backtrace v0.3.8
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.60
[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 32.07s
[INFO] running `"docker" "inspect" "57142b99f93828ab7bb0d880b02dc847b8a34c8fbd5d710cdd5a49a09a1e540f"`
[INFO] running `"docker" "rm" "-f" "57142b99f93828ab7bb0d880b02dc847b8a34c8fbd5d710cdd5a49a09a1e540f"`
[INFO] [stdout] 57142b99f93828ab7bb0d880b02dc847b8a34c8fbd5d710cdd5a49a09a1e540f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 0300975a7d4f41f4cfb34cb9c6455bcf2aa903ca19026dd83b5995fdd96044ed
[INFO] running `"docker" "start" "-a" "0300975a7d4f41f4cfb34cb9c6455bcf2aa903ca19026dd83b5995fdd96044ed"`
[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 0.90s
[INFO] running `"docker" "inspect" "0300975a7d4f41f4cfb34cb9c6455bcf2aa903ca19026dd83b5995fdd96044ed"`
[INFO] running `"docker" "rm" "-f" "0300975a7d4f41f4cfb34cb9c6455bcf2aa903ca19026dd83b5995fdd96044ed"`
[INFO] [stdout] 0300975a7d4f41f4cfb34cb9c6455bcf2aa903ca19026dd83b5995fdd96044ed
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 9304ed22f2a37bfbb0435435f11b5dfb3ff119644431df272efe1b69e9b2d409
[INFO] running `"docker" "start" "-a" "9304ed22f2a37bfbb0435435f11b5dfb3ff119644431df272efe1b69e9b2d409"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/city_generator-2b7b0a3e2d72714a
[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" "9304ed22f2a37bfbb0435435f11b5dfb3ff119644431df272efe1b69e9b2d409"`
[INFO] running `"docker" "rm" "-f" "9304ed22f2a37bfbb0435435f11b5dfb3ff119644431df272efe1b69e9b2d409"`
[INFO] [stdout] 9304ed22f2a37bfbb0435435f11b5dfb3ff119644431df272efe1b69e9b2d409