[INFO] updating cached repository JohnathanFL/rust_scrabble
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/JohnathanFL/rust_scrabble
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/JohnathanFL/rust_scrabble" "work/ex/beta-1.37-6/sources/1.36.0/gh/JohnathanFL/rust_scrabble"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/JohnathanFL/rust_scrabble'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/JohnathanFL/rust_scrabble" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/JohnathanFL/rust_scrabble"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/JohnathanFL/rust_scrabble'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e3263cfccd6d9d02039e39f225c5bab63fdaa073
[INFO] sha for GitHub repo JohnathanFL/rust_scrabble: e3263cfccd6d9d02039e39f225c5bab63fdaa073
[INFO] validating manifest of JohnathanFL/rust_scrabble 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 JohnathanFL/rust_scrabble 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 JohnathanFL/rust_scrabble
[INFO] finished frobbing JohnathanFL/rust_scrabble
[INFO] frobbed toml for JohnathanFL/rust_scrabble written to work/ex/beta-1.37-6/sources/1.36.0/gh/JohnathanFL/rust_scrabble/Cargo.toml
[INFO] started frobbing JohnathanFL/rust_scrabble
[INFO] finished frobbing JohnathanFL/rust_scrabble
[INFO] frobbed toml for JohnathanFL/rust_scrabble written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/JohnathanFL/rust_scrabble/Cargo.toml
[INFO] crate JohnathanFL/rust_scrabble 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 JohnathanFL/rust_scrabble 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/JohnathanFL/rust_scrabble:/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] aa02cf364bf55dfca8b33f178adf9959da70296f3a81df70a43657fd9fcbe44a
[INFO] running `"docker" "start" "-a" "aa02cf364bf55dfca8b33f178adf9959da70296f3a81df70a43657fd9fcbe44a"`
[INFO] [stderr]    Compiling rust_scrabble v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/main.rs:63:63
[INFO] [stderr]    |
[INFO] [stderr] 63 |         let choice: i8 = choice.parse::<i8>().unwrap_or_else(|e| {
[INFO] [stderr]    |                                                               ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::str::<impl str>::trim` that must be used
[INFO] [stderr]   --> src/main.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |         line.trim();
[INFO] [stderr]    |         ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this returns the trimmed string as a slice, without modifying the original
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.82s
[INFO] running `"docker" "inspect" "aa02cf364bf55dfca8b33f178adf9959da70296f3a81df70a43657fd9fcbe44a"`
[INFO] running `"docker" "rm" "-f" "aa02cf364bf55dfca8b33f178adf9959da70296f3a81df70a43657fd9fcbe44a"`
[INFO] [stdout] aa02cf364bf55dfca8b33f178adf9959da70296f3a81df70a43657fd9fcbe44a
[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/JohnathanFL/rust_scrabble:/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] 2d5146e161f866d79cefaeca04601f510de1386c7e555d9158a7b0739045f72c
[INFO] running `"docker" "start" "-a" "2d5146e161f866d79cefaeca04601f510de1386c7e555d9158a7b0739045f72c"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_scrabble v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/main.rs:63:63
[INFO] [stderr]    |
[INFO] [stderr] 63 |         let choice: i8 = choice.parse::<i8>().unwrap_or_else(|e| {
[INFO] [stderr]    |                                                               ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `core::str::<impl str>::trim` that must be used
[INFO] [stderr]   --> src/main.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |         line.trim();
[INFO] [stderr]    |         ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this returns the trimmed string as a slice, without modifying the original
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `"docker" "inspect" "2d5146e161f866d79cefaeca04601f510de1386c7e555d9158a7b0739045f72c"`
[INFO] running `"docker" "rm" "-f" "2d5146e161f866d79cefaeca04601f510de1386c7e555d9158a7b0739045f72c"`
[INFO] [stdout] 2d5146e161f866d79cefaeca04601f510de1386c7e555d9158a7b0739045f72c
[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/JohnathanFL/rust_scrabble:/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] 1f0947bfe2510d037a4a2f7bc26f9e91a84f25a8e2ff7e5e5c07a943b9365987
[INFO] running `"docker" "start" "-a" "1f0947bfe2510d037a4a2f7bc26f9e91a84f25a8e2ff7e5e5c07a943b9365987"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_scrabble-87713c560167b97d
[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" "1f0947bfe2510d037a4a2f7bc26f9e91a84f25a8e2ff7e5e5c07a943b9365987"`
[INFO] running `"docker" "rm" "-f" "1f0947bfe2510d037a4a2f7bc26f9e91a84f25a8e2ff7e5e5c07a943b9365987"`
[INFO] [stdout] 1f0947bfe2510d037a4a2f7bc26f9e91a84f25a8e2ff7e5e5c07a943b9365987