[INFO] cloning repository https://github.com/nikhil-nayyar/not-scrabble
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nikhil-nayyar/not-scrabble" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikhil-nayyar%2Fnot-scrabble", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikhil-nayyar%2Fnot-scrabble'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c35fa506624407619bed68dbbfa2c9a19ed4d6c3
[INFO] building nikhil-nayyar/not-scrabble against master#44f415c1d617ebc7b931a243b7b321ef8a6ca47c for pr-142134-abi-ast-error
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikhil-nayyar%2Fnot-scrabble" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nikhil-nayyar/not-scrabble on toolchain 44f415c1d617ebc7b931a243b7b321ef8a6ca47c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nikhil-nayyar/not-scrabble
[INFO] finished tweaking git repo https://github.com/nikhil-nayyar/not-scrabble
[INFO] tweaked toml for git repo https://github.com/nikhil-nayyar/not-scrabble written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/nikhil-nayyar/not-scrabble already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b86159b882986237f7abf6e20156a7fba687d9e5ea28cf09b778afe1b948bea6
[INFO] running `Command { std: "docker" "start" "-a" "b86159b882986237f7abf6e20156a7fba687d9e5ea28cf09b778afe1b948bea6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b86159b882986237f7abf6e20156a7fba687d9e5ea28cf09b778afe1b948bea6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b86159b882986237f7abf6e20156a7fba687d9e5ea28cf09b778afe1b948bea6", kill_on_drop: false }`
[INFO] [stdout] b86159b882986237f7abf6e20156a7fba687d9e5ea28cf09b778afe1b948bea6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d813c600c7ff66c92014c930af1d5cec42bdd427b756ade7ac2c705b59d56632
[INFO] running `Command { std: "docker" "start" "-a" "d813c600c7ff66c92014c930af1d5cec42bdd427b756ade7ac2c705b59d56632", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.3
[INFO] [stderr]    Compiling parking_lot_core v0.9.4
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling signal-hook v0.3.14
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling rustix v0.36.4
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling linux-raw-sys v0.1.3
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling regex-syntax v0.6.28
[INFO] [stderr]    Compiling serde_json v1.0.91
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling itoa v1.0.5
[INFO] [stderr]    Compiling ryu v1.0.12
[INFO] [stderr]    Compiling unicode-segmentation v1.10.0
[INFO] [stderr]    Compiling unicode-width v0.1.10
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling cassowary v0.3.0
[INFO] [stderr]    Compiling json v0.12.4
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling regex v1.7.0
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling mio v0.8.5
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling signal-hook-mio v0.2.3
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling crossterm v0.25.0
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling tui v0.19.0
[INFO] [stderr]    Compiling is-terminal v0.4.1
[INFO] [stderr]    Compiling env_logger v0.10.0
[INFO] [stderr]    Compiling krible v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `txt` is never read
[INFO] [stdout]    --> src/ui.rs:172:21
[INFO] [stdout]     |
[INFO] [stdout] 172 |             let mut txt:String = "".into();
[INFO] [stdout]     |                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `row`, `col`, and `state` are never read
[INFO] [stdout]   --> src/board.rs:96:9
[INFO] [stdout]    |
[INFO] [stdout] 95 | pub struct Cell{
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 96 |     pub row: u8,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 97 |     pub col: u8,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 98 |     pub modifier: CellModifier,
[INFO] [stdout] 99 |     pub state: CellState,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Tiled` and `Selected` are never constructed
[INFO] [stdout]    --> src/board.rs:169:5
[INFO] [stdout]     |
[INFO] [stdout] 167 | pub enum CellState{
[INFO] [stdout]     |          --------- variants in this enum
[INFO] [stdout] 168 |     Empty,
[INFO] [stdout] 169 |     Tiled,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 170 |     Selected
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/tiles.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Tile{
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 12 |     letter: char,
[INFO] [stdout] 13 |     value: u8,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Board` is never constructed
[INFO] [stdout]   --> src/tiles.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub enum TileStatus{
[INFO] [stdout]    |          ---------- variant in this enum
[INFO] [stdout] 19 |     Board,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_empty` is never used
[INFO] [stdout]    --> src/tiles.rs:124:12
[INFO] [stdout]     |
[INFO] [stdout] 77  | impl TileBag{
[INFO] [stdout]     | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 124 |     pub fn is_empty(&self) -> bool{
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_count` is never used
[INFO] [stdout]    --> src/tiles.rs:256:12
[INFO] [stdout]     |
[INFO] [stdout] 176 | impl TileRack{
[INFO] [stdout]     | ------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 256 |     pub fn get_count(&self) -> u8{
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `bag` is never read
[INFO] [stdout]   --> src/app.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct App{
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 20 |     pub board: Board,
[INFO] [stdout] 21 |     pub bag: TileBag,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.03s
[INFO] running `Command { std: "docker" "inspect" "d813c600c7ff66c92014c930af1d5cec42bdd427b756ade7ac2c705b59d56632", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d813c600c7ff66c92014c930af1d5cec42bdd427b756ade7ac2c705b59d56632", kill_on_drop: false }`
[INFO] [stdout] d813c600c7ff66c92014c930af1d5cec42bdd427b756ade7ac2c705b59d56632
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3ceed2fe11fc8606297b51f331531ebbfac7896b00dcbcb72bc8778c13743a97
[INFO] running `Command { std: "docker" "start" "-a" "3ceed2fe11fc8606297b51f331531ebbfac7896b00dcbcb72bc8778c13743a97", kill_on_drop: false }`
[INFO] [stderr]    Compiling krible v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `txt` is never read
[INFO] [stdout]    --> src/ui.rs:172:21
[INFO] [stdout]     |
[INFO] [stdout] 172 |             let mut txt:String = "".into();
[INFO] [stdout]     |                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `row`, `col`, and `state` are never read
[INFO] [stdout]   --> src/board.rs:96:9
[INFO] [stdout]    |
[INFO] [stdout] 95 | pub struct Cell{
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 96 |     pub row: u8,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 97 |     pub col: u8,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 98 |     pub modifier: CellModifier,
[INFO] [stdout] 99 |     pub state: CellState,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Tiled` and `Selected` are never constructed
[INFO] [stdout]    --> src/board.rs:169:5
[INFO] [stdout]     |
[INFO] [stdout] 167 | pub enum CellState{
[INFO] [stdout]     |          --------- variants in this enum
[INFO] [stdout] 168 |     Empty,
[INFO] [stdout] 169 |     Tiled,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 170 |     Selected
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/tiles.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Tile{
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 12 |     letter: char,
[INFO] [stdout] 13 |     value: u8,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Board` is never constructed
[INFO] [stdout]   --> src/tiles.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub enum TileStatus{
[INFO] [stdout]    |          ---------- variant in this enum
[INFO] [stdout] 19 |     Board,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_empty` is never used
[INFO] [stdout]    --> src/tiles.rs:124:12
[INFO] [stdout]     |
[INFO] [stdout] 77  | impl TileBag{
[INFO] [stdout]     | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 124 |     pub fn is_empty(&self) -> bool{
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_count` is never used
[INFO] [stdout]    --> src/tiles.rs:256:12
[INFO] [stdout]     |
[INFO] [stdout] 176 | impl TileRack{
[INFO] [stdout]     | ------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 256 |     pub fn get_count(&self) -> u8{
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `bag` is never read
[INFO] [stdout]   --> src/app.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct App{
[INFO] [stdout]    |            --- field in this struct
[INFO] [stdout] 20 |     pub board: Board,
[INFO] [stdout] 21 |     pub bag: TileBag,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "3ceed2fe11fc8606297b51f331531ebbfac7896b00dcbcb72bc8778c13743a97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ceed2fe11fc8606297b51f331531ebbfac7896b00dcbcb72bc8778c13743a97", kill_on_drop: false }`
[INFO] [stdout] 3ceed2fe11fc8606297b51f331531ebbfac7896b00dcbcb72bc8778c13743a97