[INFO] updating cached repository thbar/rust-playground
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/thbar/rust-playground
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/thbar/rust-playground" "work/ex/beta-1.37-6/sources/1.36.0/gh/thbar/rust-playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/thbar/rust-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/thbar/rust-playground" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/thbar/rust-playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/thbar/rust-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6d43660e5c89705273ed0cf0ddb43c431f6dfbb6
[INFO] sha for GitHub repo thbar/rust-playground: 6d43660e5c89705273ed0cf0ddb43c431f6dfbb6
[INFO] validating manifest of thbar/rust-playground 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 thbar/rust-playground 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 thbar/rust-playground
[INFO] finished frobbing thbar/rust-playground
[INFO] frobbed toml for thbar/rust-playground written to work/ex/beta-1.37-6/sources/1.36.0/gh/thbar/rust-playground/Cargo.toml
[INFO] started frobbing thbar/rust-playground
[INFO] finished frobbing thbar/rust-playground
[INFO] frobbed toml for thbar/rust-playground written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/thbar/rust-playground/Cargo.toml
[INFO] crate thbar/rust-playground 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 thbar/rust-playground 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-6/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/thbar/rust-playground:/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] 7ab41162717c55942b3dc3faff98cf8f3bae0480cf9a61a8630841e2c79b8cb3
[INFO] running `"docker" "start" "-a" "7ab41162717c55942b3dc3faff98cf8f3bae0480cf9a61a8630841e2c79b8cb3"`
[INFO] [stderr]    Compiling rust-playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `"docker" "inspect" "7ab41162717c55942b3dc3faff98cf8f3bae0480cf9a61a8630841e2c79b8cb3"`
[INFO] running `"docker" "rm" "-f" "7ab41162717c55942b3dc3faff98cf8f3bae0480cf9a61a8630841e2c79b8cb3"`
[INFO] [stdout] 7ab41162717c55942b3dc3faff98cf8f3bae0480cf9a61a8630841e2c79b8cb3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/thbar/rust-playground:/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] 4efb06bd671d7a86d751e9e7bc10784d6df4e953997b65ddfed0d42dbcad19f0
[INFO] running `"docker" "start" "-a" "4efb06bd671d7a86d751e9e7bc10784d6df4e953997b65ddfed0d42dbcad19f0"`
[INFO] [stderr]    Compiling rust-playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Point`
[INFO] [stderr]    --> src/lib.rs:190:9
[INFO] [stderr]     |
[INFO] [stderr] 190 |         struct Point { x: f32, y: f32 };
[INFO] [stderr]     |         ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Rectangle`
[INFO] [stderr]    --> src/lib.rs:191:9
[INFO] [stderr]     |
[INFO] [stderr] 191 |         struct Rectangle { a: Point, b: Point };
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `square`
[INFO] [stderr]    --> src/lib.rs:193:9
[INFO] [stderr]     |
[INFO] [stderr] 193 |         fn square(point: Point, size: f32) -> Rectangle {
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `"docker" "inspect" "4efb06bd671d7a86d751e9e7bc10784d6df4e953997b65ddfed0d42dbcad19f0"`
[INFO] running `"docker" "rm" "-f" "4efb06bd671d7a86d751e9e7bc10784d6df4e953997b65ddfed0d42dbcad19f0"`
[INFO] [stdout] 4efb06bd671d7a86d751e9e7bc10784d6df4e953997b65ddfed0d42dbcad19f0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/thbar/rust-playground:/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] 834b40f13f82178f872e76b23064ff67b7a8bf102ee87c2caafd83f5971183f5
[INFO] running `"docker" "start" "-a" "834b40f13f82178f872e76b23064ff67b7a8bf102ee87c2caafd83f5971183f5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_playground-8d73a83750bd3e68
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test tests::formatter_print_for_struct ... ok
[INFO] [stdout] test tests::matrix_transpose ... ok
[INFO] [stdout] test tests::check_struct ... ok
[INFO] [stdout] test tests::array ... ok
[INFO] [stdout] test tests::formatted_print ... ok
[INFO] [stdout] test tests::primitives ... ok
[INFO] [stdout] test tests::tuple ... ok
[INFO] [stdout] test tests::square ... ok
[INFO] [stdout] test tests::rect_area ... ok
[INFO] [stdout] test tests::printing_struct ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust-playground
[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" "834b40f13f82178f872e76b23064ff67b7a8bf102ee87c2caafd83f5971183f5"`
[INFO] running `"docker" "rm" "-f" "834b40f13f82178f872e76b23064ff67b7a8bf102ee87c2caafd83f5971183f5"`
[INFO] [stdout] 834b40f13f82178f872e76b23064ff67b7a8bf102ee87c2caafd83f5971183f5