[INFO] updating cached repository pipct/bananagrams-host
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/pipct/bananagrams-host
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/pipct/bananagrams-host" "work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/pipct/bananagrams-host"`
[INFO] [stderr] Cloning into 'work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/pipct/bananagrams-host'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pipct/bananagrams-host" "work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/pipct/bananagrams-host"`
[INFO] [stderr] Cloning into 'work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/pipct/bananagrams-host'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3bda27b51c5dbcb19d4c9ea391c0c74e9d87976f
[INFO] sha for GitHub repo pipct/bananagrams-host: 3bda27b51c5dbcb19d4c9ea391c0c74e9d87976f
[INFO] validating manifest of pipct/bananagrams-host on toolchain master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of pipct/bananagrams-host on toolchain try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing pipct/bananagrams-host
[INFO] finished frobbing pipct/bananagrams-host
[INFO] frobbed toml for pipct/bananagrams-host written to work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/pipct/bananagrams-host/Cargo.toml
[INFO] started frobbing pipct/bananagrams-host
[INFO] finished frobbing pipct/bananagrams-host
[INFO] frobbed toml for pipct/bananagrams-host written to work/ex/pr-57321/sources/try#b9139d2caca1db46014a9c302d5c47cfae0d8ae0/gh/pipct/bananagrams-host/Cargo.toml
[INFO] crate pipct/bananagrams-host has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b9139d2caca1db46014a9c302d5c47cfae0d8ae0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking pipct/bananagrams-host against master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104 for pr-57321
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57321/worker-6/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57321/sources/master#c0bbc3927e28c22edefe6a1353b5ecc95ea9a104/gh/pipct/bananagrams-host:/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" "+c0bbc3927e28c22edefe6a1353b5ecc95ea9a104-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 39ec79443a6b1c157895d8be8b3d2d0c2806453f467c4ae32b173a6ff7d0899e
[INFO] running `"docker" "start" "-a" "39ec79443a6b1c157895d8be8b3d2d0c2806453f467c4ae32b173a6ff7d0899e"`
[INFO] [stderr]     Checking bananagrams-host v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io::BufReader`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::io::BufReader;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::BufReader`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::io::BufReader;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `GameState`
[INFO] [stderr]    --> src/main.rs:122:13
[INFO] [stderr]     |
[INFO] [stderr] 122 |     let mut GameState = GameState::Waiting(vec![false; 5]);
[INFO] [stderr]     |             ^^^^^^^^^ help: consider using `_GameState` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:122:9
[INFO] [stderr]     |
[INFO] [stderr] 122 |     let mut GameState = GameState::Waiting(vec![false; 5]);
[INFO] [stderr]     |         ----^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ProtocolError`
[INFO] [stderr]   --> src/main.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     ProtocolError,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `UnexpectedEOF`
[INFO] [stderr]   --> src/main.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     UnexpectedEOF,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LetterError`
[INFO] [stderr]   --> src/main.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     LetterError
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `readDigit` should have a snake case name such as `read_digit`
[INFO] [stderr]   --> src/main.rs:49:1
[INFO] [stderr]    |
[INFO] [stderr] 49 | / fn readDigit(chr: u8) -> u8 {
[INFO] [stderr] 50 | |     if chr < 0x30 || 0x39 < chr {
[INFO] [stderr] 51 | |         panic!("not a digit: {}", chr);
[INFO] [stderr] 52 | |     }
[INFO] [stderr] 53 | |
[INFO] [stderr] 54 | |     chr - 0x30
[INFO] [stderr] 55 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `readInt` should have a snake case name such as `read_int`
[INFO] [stderr]   --> src/main.rs:57:1
[INFO] [stderr]    |
[INFO] [stderr] 57 | / fn readInt<T>(seq: T) -> u64 where T: IntoIterator<Item=u8> {
[INFO] [stderr] 58 | |     seq.into_iter().fold(0, |acc, x| (acc*10) + readDigit(x) as u64)
[INFO] [stderr] 59 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `GameState` should have a snake case name such as `game_state`
[INFO] [stderr]    --> src/main.rs:122:9
[INFO] [stderr]     |
[INFO] [stderr] 122 |     let mut GameState = GameState::Waiting(vec![false; 5]);
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `GameState`
[INFO] [stderr]    --> src/main.rs:122:13
[INFO] [stderr]     |
[INFO] [stderr] 122 |     let mut GameState = GameState::Waiting(vec![false; 5]);
[INFO] [stderr]     |             ^^^^^^^^^ help: consider using `_GameState` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:122:9
[INFO] [stderr]     |
[INFO] [stderr] 122 |     let mut GameState = GameState::Waiting(vec![false; 5]);
[INFO] [stderr]     |         ----^^^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ProtocolError`
[INFO] [stderr]   --> src/main.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     ProtocolError,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `UnexpectedEOF`
[INFO] [stderr]   --> src/main.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     UnexpectedEOF,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `LetterError`
[INFO] [stderr]   --> src/main.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     LetterError
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `readDigit` should have a snake case name such as `read_digit`
[INFO] [stderr]   --> src/main.rs:49:1
[INFO] [stderr]    |
[INFO] [stderr] 49 | / fn readDigit(chr: u8) -> u8 {
[INFO] [stderr] 50 | |     if chr < 0x30 || 0x39 < chr {
[INFO] [stderr] 51 | |         panic!("not a digit: {}", chr);
[INFO] [stderr] 52 | |     }
[INFO] [stderr] 53 | |
[INFO] [stderr] 54 | |     chr - 0x30
[INFO] [stderr] 55 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `readInt` should have a snake case name such as `read_int`
[INFO] [stderr]   --> src/main.rs:57:1
[INFO] [stderr]    |
[INFO] [stderr] 57 | / fn readInt<T>(seq: T) -> u64 where T: IntoIterator<Item=u8> {
[INFO] [stderr] 58 | |     seq.into_iter().fold(0, |acc, x| (acc*10) + readDigit(x) as u64)
[INFO] [stderr] 59 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `GameState` should have a snake case name such as `game_state`
[INFO] [stderr]    --> src/main.rs:122:9
[INFO] [stderr]     |
[INFO] [stderr] 122 |     let mut GameState = GameState::Waiting(vec![false; 5]);
[INFO] [stderr]     |         ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `"docker" "inspect" "39ec79443a6b1c157895d8be8b3d2d0c2806453f467c4ae32b173a6ff7d0899e"`
[INFO] running `"docker" "rm" "-f" "39ec79443a6b1c157895d8be8b3d2d0c2806453f467c4ae32b173a6ff7d0899e"`
[INFO] [stdout] 39ec79443a6b1c157895d8be8b3d2d0c2806453f467c4ae32b173a6ff7d0899e