[INFO] updating cached repository ashfordneil/2048-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ashfordneil/2048-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ashfordneil/2048-rust" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ashfordneil/2048-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ashfordneil/2048-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ashfordneil/2048-rust" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ashfordneil/2048-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ashfordneil/2048-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4346ff7de1ea7d8622510199de6e8d4992d3350f
[INFO] sha for GitHub repo ashfordneil/2048-rust: 4346ff7de1ea7d8622510199de6e8d4992d3350f
[INFO] validating manifest of ashfordneil/2048-rust on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ashfordneil/2048-rust on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ashfordneil/2048-rust
[INFO] finished frobbing ashfordneil/2048-rust
[INFO] frobbed toml for ashfordneil/2048-rust written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ashfordneil/2048-rust/Cargo.toml
[INFO] started frobbing ashfordneil/2048-rust
[INFO] finished frobbing ashfordneil/2048-rust
[INFO] frobbed toml for ashfordneil/2048-rust written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/ashfordneil/2048-rust/Cargo.toml
[INFO] crate ashfordneil/2048-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking ashfordneil/2048-rust against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-1/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/ashfordneil/2048-rust:/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=forbid" "-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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0e3fda477659754f7ef6d8f2ff547fc239c14f697dd03652d44d647571976c7d
[INFO] running `"docker" "start" "-a" "0e3fda477659754f7ef6d8f2ff547fc239c14f697dd03652d44d647571976c7d"`
[INFO] [stderr]     Checking either v1.0.2
[INFO] [stderr]     Checking termion v1.1.4
[INFO] [stderr]     Checking itertools v0.5.8
[INFO] [stderr]     Checking 2048 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/board.rs:70:32
[INFO] [stderr]    |
[INFO] [stderr] 70 |                       Digit(Some((((index / BOARD_WIDTH as usize / BOARD_WIDTH as usize %
[INFO] [stderr]    |  ________________________________^
[INFO] [stderr] 71 | |                                   2) as u8))));
[INFO] [stderr]    | |____________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 70 |                     Digit(Some(((index / BOARD_WIDTH as usize / BOARD_WIDTH as usize %
[INFO] [stderr] 71 |                                   2) as u8)));
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/board.rs:115:39
[INFO] [stderr]     |
[INFO] [stderr] 115 |     fn collapse<'a, I>(row: I) -> Box<Iterator<Item = Digit> + 'a>
[INFO] [stderr]     |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Digit> + 'a`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/board.rs:70:32
[INFO] [stderr]    |
[INFO] [stderr] 70 |                       Digit(Some((((index / BOARD_WIDTH as usize / BOARD_WIDTH as usize %
[INFO] [stderr]    |  ________________________________^
[INFO] [stderr] 71 | |                                   2) as u8))));
[INFO] [stderr]    | |____________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 70 |                     Digit(Some(((index / BOARD_WIDTH as usize / BOARD_WIDTH as usize %
[INFO] [stderr] 71 |                                   2) as u8)));
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/board.rs:115:39
[INFO] [stderr]     |
[INFO] [stderr] 115 |     fn collapse<'a, I>(row: I) -> Box<Iterator<Item = Digit> + 'a>
[INFO] [stderr]     |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = Digit> + 'a`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.60s
[INFO] running `"docker" "inspect" "0e3fda477659754f7ef6d8f2ff547fc239c14f697dd03652d44d647571976c7d"`
[INFO] running `"docker" "rm" "-f" "0e3fda477659754f7ef6d8f2ff547fc239c14f697dd03652d44d647571976c7d"`
[INFO] [stdout] 0e3fda477659754f7ef6d8f2ff547fc239c14f697dd03652d44d647571976c7d