[INFO] updating cached repository widmogrod/rust-playground
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/widmogrod/rust-playground
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/widmogrod/rust-playground" "work/ex/beta-1.37-6/sources/1.36.0/gh/widmogrod/rust-playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/widmogrod/rust-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/widmogrod/rust-playground" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/widmogrod/rust-playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/widmogrod/rust-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 55d83ce6e3003ca60ae90b8989a771a7f2ce0770
[INFO] sha for GitHub repo widmogrod/rust-playground: 55d83ce6e3003ca60ae90b8989a771a7f2ce0770
[INFO] validating manifest of widmogrod/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 widmogrod/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 widmogrod/rust-playground
[INFO] finished frobbing widmogrod/rust-playground
[INFO] frobbed toml for widmogrod/rust-playground written to work/ex/beta-1.37-6/sources/1.36.0/gh/widmogrod/rust-playground/Cargo.toml
[INFO] started frobbing widmogrod/rust-playground
[INFO] finished frobbing widmogrod/rust-playground
[INFO] frobbed toml for widmogrod/rust-playground written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/widmogrod/rust-playground/Cargo.toml
[INFO] crate widmogrod/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] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing widmogrod/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-4/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/widmogrod/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] 8134020fea26a0571af98d4bc21d09bf110d105546d40b5efafee234dfcc18f5
[INFO] running `"docker" "start" "-a" "8134020fea26a0571af98d4bc21d09bf110d105546d40b5efafee234dfcc18f5"`
[INFO] [stderr]    Compiling playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variant is never constructed: `EmptyCart`
[INFO] [stderr]   --> src/ply/ddd.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     EmptyCart,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ActiveCart`
[INFO] [stderr]   --> src/ply/ddd.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     ActiveCart(UnpayedItems),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `PaidCart`
[INFO] [stderr]   --> src/ply/ddd.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     PaidCart(PayedItems, PaymentMethod)
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `new_cart`
[INFO] [stderr]   --> src/ply/ddd.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn new_cart()  -> ShoppingCart {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `items_in_cart`
[INFO] [stderr]   --> src/ply/ddd.rs:30:1
[INFO] [stderr]    |
[INFO] [stderr] 30 | fn items_in_cart(c: ShoppingCart)  -> usize {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `add_to_cart`
[INFO] [stderr]   --> src/ply/ddd.rs:39:1
[INFO] [stderr]    |
[INFO] [stderr] 39 | fn add_to_cart(c: ShoppingCart, i: Item) -> ShoppingCart {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `"docker" "inspect" "8134020fea26a0571af98d4bc21d09bf110d105546d40b5efafee234dfcc18f5"`
[INFO] running `"docker" "rm" "-f" "8134020fea26a0571af98d4bc21d09bf110d105546d40b5efafee234dfcc18f5"`
[INFO] [stdout] 8134020fea26a0571af98d4bc21d09bf110d105546d40b5efafee234dfcc18f5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/widmogrod/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] 77d065547f24355e050bc97cae464d6b1a077db3ae3f0f307369dc0502532f1a
[INFO] running `"docker" "start" "-a" "77d065547f24355e050bc97cae464d6b1a077db3ae3f0f307369dc0502532f1a"`
[INFO] [stderr]    Compiling playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variant is never constructed: `PaidCart`
[INFO] [stderr]   --> src/ply/ddd.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     PaidCart(PayedItems, PaymentMethod)
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `items_in_cart`
[INFO] [stderr]   --> src/ply/ddd.rs:30:1
[INFO] [stderr]    |
[INFO] [stderr] 30 | fn items_in_cart(c: ShoppingCart)  -> usize {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `"docker" "inspect" "77d065547f24355e050bc97cae464d6b1a077db3ae3f0f307369dc0502532f1a"`
[INFO] running `"docker" "rm" "-f" "77d065547f24355e050bc97cae464d6b1a077db3ae3f0f307369dc0502532f1a"`
[INFO] [stdout] 77d065547f24355e050bc97cae464d6b1a077db3ae3f0f307369dc0502532f1a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/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/widmogrod/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] afe9ff24a426591fdc0a54f5e5d0026b7203bb3ead944376f4cbc914bc9cfcf2
[INFO] running `"docker" "start" "-a" "afe9ff24a426591fdc0a54f5e5d0026b7203bb3ead944376f4cbc914bc9cfcf2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/playground-26074f9c3dd60946
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test ply::combinators::tests::test_priv ... ok
[INFO] [stderr]      Running /opt/crater/target/debug/deps/integration_ply-370e999b38011cc5
[INFO] [stdout] test ply::ddd::tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests playground
[INFO] [stdout] running 6 tests
[INFO] [stdout] test test_identity ... ok
[INFO] [stdout] test test_apply ... ok
[INFO] [stdout] test test_flip ... ok
[INFO] [stdout] test test_trush ... ok
[INFO] [stdout] test test_constt ... ok
[INFO] [stdout] test test_compose ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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" "afe9ff24a426591fdc0a54f5e5d0026b7203bb3ead944376f4cbc914bc9cfcf2"`
[INFO] running `"docker" "rm" "-f" "afe9ff24a426591fdc0a54f5e5d0026b7203bb3ead944376f4cbc914bc9cfcf2"`
[INFO] [stdout] afe9ff24a426591fdc0a54f5e5d0026b7203bb3ead944376f4cbc914bc9cfcf2