[INFO] cloning repository https://github.com/LukeThoma5/rs-solitaire
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LukeThoma5/rs-solitaire" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLukeThoma5%2Frs-solitaire", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLukeThoma5%2Frs-solitaire'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b089b156a5e0630527dff210933c51f2f4941f36
[INFO] testing LukeThoma5/rs-solitaire against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLukeThoma5%2Frs-solitaire" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LukeThoma5/rs-solitaire on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LukeThoma5/rs-solitaire
[INFO] finished tweaking git repo https://github.com/LukeThoma5/rs-solitaire
[INFO] tweaked toml for git repo https://github.com/LukeThoma5/rs-solitaire written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/LukeThoma5/rs-solitaire already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6949a52d07a14e9e365417f07abba7e3f4a8981e5c144f41f444a9d021ac3701
[INFO] running `Command { std: "docker" "start" "-a" "6949a52d07a14e9e365417f07abba7e3f4a8981e5c144f41f444a9d021ac3701", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6949a52d07a14e9e365417f07abba7e3f4a8981e5c144f41f444a9d021ac3701", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6949a52d07a14e9e365417f07abba7e3f4a8981e5c144f41f444a9d021ac3701", kill_on_drop: false }`
[INFO] [stdout] 6949a52d07a14e9e365417f07abba7e3f4a8981e5c144f41f444a9d021ac3701
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6d6745650bde2c766052e7aaef5abe21ce49e89846067b7f95550bb07770e8c
[INFO] running `Command { std: "docker" "start" "-a" "c6d6745650bde2c766052e7aaef5abe21ce49e89846067b7f95550bb07770e8c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.41
[INFO] [stderr]    Compiling rand_core v0.2.0
[INFO] [stderr]    Compiling rand v0.5.0
[INFO] [stderr]    Compiling solataire v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0412]: cannot find type `NoneError` in module `std::option`
[INFO] [stdout]   --> src/main.rs:33:24
[INFO] [stdout]    |
[INFO] [stdout] 33 | impl From<std::option::NoneError> for GameError {
[INFO] [stdout]    |                        ^^^^^^^^^ not found in `std::option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `NoneError` in module `std::option`
[INFO] [stdout]   --> src/main.rs:34:29
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn from(x: std::option::NoneError) -> GameError {
[INFO] [stdout]    |                             ^^^^^^^^^ not found in `std::option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(rustc_private)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_path_invoc)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `proc_macro_path_invoc` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(use_extern_macros)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `use_extern_macros` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `proc_macro_path_invoc` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_path_invoc)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `use_extern_macros` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(use_extern_macros)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(try_trait)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `try_trait`
[INFO] [stdout]  --> src/main.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(try_trait)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> src/main.rs:181:24
[INFO] [stdout]     |
[INFO] [stdout] 150 | /     fn move_cards(
[INFO] [stdout] 151 | |         &mut self,
[INFO] [stdout] 152 | |         col_from_index: usize,
[INFO] [stdout] 153 | |         card_index: usize,
[INFO] [stdout] ...   |
[INFO] [stdout] 181 | |                 .next()?;
[INFO] [stdout]     | |                        ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] ...   |
[INFO] [stdout] 206 | |         Ok(())
[INFO] [stdout] 207 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> src/main.rs:264:40
[INFO] [stdout]     |
[INFO] [stdout] 262 | /     fn hand_to_column(&mut self, column: usize) -> Result<(), GameError> {
[INFO] [stdout] 263 | |         {
[INFO] [stdout] 264 | |             let card = self.hand.last()?;
[INFO] [stdout]     | |                                        ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] 265 | |
[INFO] [stdout] ...   |
[INFO] [stdout] 285 | |         Ok(())
[INFO] [stdout] 286 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> src/main.rs:266:47
[INFO] [stdout]     |
[INFO] [stdout] 262 | /     fn hand_to_column(&mut self, column: usize) -> Result<(), GameError> {
[INFO] [stdout] 263 | |         {
[INFO] [stdout] 264 | |             let card = self.hand.last()?;
[INFO] [stdout] 265 | |
[INFO] [stdout] 266 | |             let column = self.cols.get(column)?;
[INFO] [stdout]     | |                                               ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] ...   |
[INFO] [stdout] 285 | |         Ok(())
[INFO] [stdout] 286 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> src/main.rs:277:29
[INFO] [stdout]     |
[INFO] [stdout] 262 | /     fn hand_to_column(&mut self, column: usize) -> Result<(), GameError> {
[INFO] [stdout] 263 | |         {
[INFO] [stdout] 264 | |             let card = self.hand.last()?;
[INFO] [stdout] 265 | |
[INFO] [stdout] ...   |
[INFO] [stdout] 277 | |             .get_mut(column)?
[INFO] [stdout]     | |                             ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] ...   |
[INFO] [stdout] 285 | |         Ok(())
[INFO] [stdout] 286 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> src/main.rs:279:39
[INFO] [stdout]     |
[INFO] [stdout] 262 | /     fn hand_to_column(&mut self, column: usize) -> Result<(), GameError> {
[INFO] [stdout] 263 | |         {
[INFO] [stdout] 264 | |             let card = self.hand.last()?;
[INFO] [stdout] 265 | |
[INFO] [stdout] ...   |
[INFO] [stdout] 279 | |             .push_back(self.hand.pop()?);
[INFO] [stdout]     | |                                       ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] ...   |
[INFO] [stdout] 285 | |         Ok(())
[INFO] [stdout] 286 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> src/main.rs:331:47
[INFO] [stdout]     |
[INFO] [stdout] 330 | /     fn column_to_bucket(&mut self, column: usize) -> Result<(), GameError> {
[INFO] [stdout] 331 | |         let column = self.cols.get_mut(column)?;
[INFO] [stdout]     | |                                               ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] 332 | |         let bucket: &mut Vec<Card>;
[INFO] [stdout] 333 | |         {
[INFO] [stdout] ...   |
[INFO] [stdout] 353 | |         Ok(())
[INFO] [stdout] 354 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> src/main.rs:334:50
[INFO] [stdout]     |
[INFO] [stdout] 330 | /     fn column_to_bucket(&mut self, column: usize) -> Result<(), GameError> {
[INFO] [stdout] 331 | |         let column = self.cols.get_mut(column)?;
[INFO] [stdout] 332 | |         let bucket: &mut Vec<Card>;
[INFO] [stdout] 333 | |         {
[INFO] [stdout] 334 | |             let move_card = column.visible.back()?;
[INFO] [stdout]     | |                                                  ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] ...   |
[INFO] [stdout] 353 | |         Ok(())
[INFO] [stdout] 354 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> src/main.rs:351:46
[INFO] [stdout]     |
[INFO] [stdout] 330 | /     fn column_to_bucket(&mut self, column: usize) -> Result<(), GameError> {
[INFO] [stdout] 331 | |         let column = self.cols.get_mut(column)?;
[INFO] [stdout] 332 | |         let bucket: &mut Vec<Card>;
[INFO] [stdout] 333 | |         {
[INFO] [stdout] ...   |
[INFO] [stdout] 351 | |         bucket.push(column.visible.pop_back()?);
[INFO] [stdout]     | |                                              ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] 352 | |         column.reveal();
[INFO] [stdout] 353 | |         Ok(())
[INFO] [stdout] 354 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> src/main.rs:361:45
[INFO] [stdout]     |
[INFO] [stdout] 356 | /     fn hand_to_bucket(&mut self) -> Result<(), GameError> {
[INFO] [stdout] 357 | |         
[INFO] [stdout] 358 | |         {
[INFO] [stdout] 359 | |             let bucket: &mut Vec<Card>;
[INFO] [stdout] 360 | |         {
[INFO] [stdout] 361 | |             let move_card = self.hand.last()?;
[INFO] [stdout]     | |                                             ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] ...   |
[INFO] [stdout] 381 | |         Ok(())
[INFO] [stdout] 382 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> src/main.rs:378:36
[INFO] [stdout]     |
[INFO] [stdout] 356 | /     fn hand_to_bucket(&mut self) -> Result<(), GameError> {
[INFO] [stdout] 357 | |         
[INFO] [stdout] 358 | |         {
[INFO] [stdout] 359 | |             let bucket: &mut Vec<Card>;
[INFO] [stdout] ...   |
[INFO] [stdout] 378 | |         bucket.push(self.hand.pop()?);
[INFO] [stdout]     | |                                    ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] ...   |
[INFO] [stdout] 381 | |         Ok(())
[INFO] [stdout] 382 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> src/main.rs:385:47
[INFO] [stdout]     |
[INFO] [stdout] 384 | /     fn bucket_to_column(&mut self, column: usize, bucket_suit: CardSuit) -> Result<(), GameError> {
[INFO] [stdout] 385 | |         let column = self.cols.get_mut(column)?;
[INFO] [stdout]     | |                                               ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] 386 | |         let bucket: &mut Vec<Card>;
[INFO] [stdout] 387 | |         {
[INFO] [stdout] ...   |
[INFO] [stdout] 403 | |         Ok(())
[INFO] [stdout] 404 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> src/main.rs:395:42
[INFO] [stdout]     |
[INFO] [stdout] 384 | /     fn bucket_to_column(&mut self, column: usize, bucket_suit: CardSuit) -> Result<(), GameError> {
[INFO] [stdout] 385 | |         let column = self.cols.get_mut(column)?;
[INFO] [stdout] 386 | |         let bucket: &mut Vec<Card>;
[INFO] [stdout] 387 | |         {
[INFO] [stdout] ...   |
[INFO] [stdout] 395 | |             let move_card = bucket.last()?;
[INFO] [stdout]     | |                                          ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] ...   |
[INFO] [stdout] 403 | |         Ok(())
[INFO] [stdout] 404 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> src/main.rs:402:46
[INFO] [stdout]     |
[INFO] [stdout] 384 | /     fn bucket_to_column(&mut self, column: usize, bucket_suit: CardSuit) -> Result<(), GameError> {
[INFO] [stdout] 385 | |         let column = self.cols.get_mut(column)?;
[INFO] [stdout] 386 | |         let bucket: &mut Vec<Card>;
[INFO] [stdout] 387 | |         {
[INFO] [stdout] ...   |
[INFO] [stdout] 402 | |         column.visible.push_back(bucket.pop()?);
[INFO] [stdout]     | |                                              ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] 403 | |         Ok(())
[INFO] [stdout] 404 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a function that returns `Result`
[INFO] [stdout]    --> src/main.rs:451:83
[INFO] [stdout]     |
[INFO] [stdout] 414 | / fn make_move(field: &mut Playfield) -> Result<(), GameError> {
[INFO] [stdout] 415 | |     use std::io::stdin;
[INFO] [stdout] 416 | |
[INFO] [stdout] 417 | |     field.print();
[INFO] [stdout] ...   |
[INFO] [stdout] 451 | |         (Some(&"cheat"), Some(&"pop"), ..) => {field.backlog.push(field.hand.pop()?);},
[INFO] [stdout]     | |                                                                                   ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), GameError>`
[INFO] [stdout] ...   |
[INFO] [stdout] 456 | |     Ok(())
[INFO] [stdout] 457 | | }
[INFO] [stdout]     | |_- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), GameError>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 22 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0412, E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `solataire` due to 23 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "c6d6745650bde2c766052e7aaef5abe21ce49e89846067b7f95550bb07770e8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6d6745650bde2c766052e7aaef5abe21ce49e89846067b7f95550bb07770e8c", kill_on_drop: false }`
[INFO] [stdout] c6d6745650bde2c766052e7aaef5abe21ce49e89846067b7f95550bb07770e8c