[INFO] updating cached repository skrap/rusted_cart
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/skrap/rusted_cart
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/skrap/rusted_cart" "work/ex/beta-1.38-1/sources/1.37.0/gh/skrap/rusted_cart"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/skrap/rusted_cart'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/skrap/rusted_cart" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/skrap/rusted_cart"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/skrap/rusted_cart'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 661f75d65b3a215c9b4d8186013a662339b005c5
[INFO] sha for GitHub repo skrap/rusted_cart: 661f75d65b3a215c9b4d8186013a662339b005c5
[INFO] validating manifest of skrap/rusted_cart 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 skrap/rusted_cart 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 skrap/rusted_cart
[INFO] finished frobbing skrap/rusted_cart
[INFO] frobbed toml for skrap/rusted_cart written to work/ex/beta-1.38-1/sources/1.37.0/gh/skrap/rusted_cart/Cargo.toml
[INFO] started frobbing skrap/rusted_cart
[INFO] finished frobbing skrap/rusted_cart
[INFO] frobbed toml for skrap/rusted_cart written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/skrap/rusted_cart/Cargo.toml
[INFO] crate skrap/rusted_cart 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 skrap/rusted_cart 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-0/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/skrap/rusted_cart:/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] 464b47c9546a619864fd9ad02c808417550e1e99ecbc31ecd03d8cbd03b3b739
[INFO] running `"docker" "start" "-a" "464b47c9546a619864fd9ad02c808417550e1e99ecbc31ecd03d8cbd03b3b739"`
[INFO] [stderr]    Compiling libc v0.2.49
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling csv-core v0.1.5
[INFO] [stderr]    Compiling csv v1.0.5
[INFO] [stderr]    Compiling rusted_cart v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/main.rs:7:38
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn mushes() -> Result<Vec<Mush>, Box<Error>> {
[INFO] [stderr]   |                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Gini`
[INFO] [stderr]   --> src/main.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     Gini,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.85s
[INFO] running `"docker" "inspect" "464b47c9546a619864fd9ad02c808417550e1e99ecbc31ecd03d8cbd03b3b739"`
[INFO] running `"docker" "rm" "-f" "464b47c9546a619864fd9ad02c808417550e1e99ecbc31ecd03d8cbd03b3b739"`
[INFO] [stdout] 464b47c9546a619864fd9ad02c808417550e1e99ecbc31ecd03d8cbd03b3b739
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/skrap/rusted_cart:/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] 6682b8b5f83538ecb83d239a8977095f005d6b87557ecdf002f0e8b2453d3673
[INFO] running `"docker" "start" "-a" "6682b8b5f83538ecb83d239a8977095f005d6b87557ecdf002f0e8b2453d3673"`
[INFO] [stderr]    Compiling rusted_cart v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/main.rs:7:38
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn mushes() -> Result<Vec<Mush>, Box<Error>> {
[INFO] [stderr]   |                                      ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Gini`
[INFO] [stderr]   --> src/main.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     Gini,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.61s
[INFO] running `"docker" "inspect" "6682b8b5f83538ecb83d239a8977095f005d6b87557ecdf002f0e8b2453d3673"`
[INFO] running `"docker" "rm" "-f" "6682b8b5f83538ecb83d239a8977095f005d6b87557ecdf002f0e8b2453d3673"`
[INFO] [stdout] 6682b8b5f83538ecb83d239a8977095f005d6b87557ecdf002f0e8b2453d3673
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/skrap/rusted_cart:/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] 482ffd805491f76a37596752ddd47d311ceac97751472572f0d81b76aa0b533d
[INFO] running `"docker" "start" "-a" "482ffd805491f76a37596752ddd47d311ceac97751472572f0d81b76aa0b533d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rusted_cart-62f97553bca2abe2
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rusted_cart-73aededca3698793
[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] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test_answer ... ok
[INFO] [stdout] test test_question_fmt ... ok
[INFO] [stdout] test test_impurity ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rusted_cart
[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" "482ffd805491f76a37596752ddd47d311ceac97751472572f0d81b76aa0b533d"`
[INFO] running `"docker" "rm" "-f" "482ffd805491f76a37596752ddd47d311ceac97751472572f0d81b76aa0b533d"`
[INFO] [stdout] 482ffd805491f76a37596752ddd47d311ceac97751472572f0d81b76aa0b533d