[INFO] cloning repository https://github.com/TyPR124/advent-of-code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TyPR124/advent-of-code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTyPR124%2Fadvent-of-code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTyPR124%2Fadvent-of-code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3c476baf7b1188fca754cc9c07eedbfa5125a6fc
[INFO] checking TyPR124/advent-of-code against master#fc81ad22c453776de16acf9938976930cf8c9401 for pr-77325
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTyPR124%2Fadvent-of-code" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TyPR124/advent-of-code on toolchain fc81ad22c453776de16acf9938976930cf8c9401
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-13/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/TyPR124/advent-of-code
[INFO] finished tweaking git repo https://github.com/TyPR124/advent-of-code
[INFO] tweaked toml for git repo https://github.com/TyPR124/advent-of-code written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/TyPR124/advent-of-code already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 58234bedba613d07310ee227d95cb1bd9120fa512fbf11131ba3c503ccba8857
[INFO] running `Command { std: "docker" "start" "-a" "58234bedba613d07310ee227d95cb1bd9120fa512fbf11131ba3c503ccba8857", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58234bedba613d07310ee227d95cb1bd9120fa512fbf11131ba3c503ccba8857", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58234bedba613d07310ee227d95cb1bd9120fa512fbf11131ba3c503ccba8857", kill_on_drop: false }`
[INFO] [stdout] 58234bedba613d07310ee227d95cb1bd9120fa512fbf11131ba3c503ccba8857
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7865fe3fd40e4041f0704ca35e655e55977588b003cafe6c83af5e25f77cc432
[INFO] running `Command { std: "docker" "start" "-a" "7865fe3fd40e4041f0704ca35e655e55977588b003cafe6c83af5e25f77cc432", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking aoc_2019 v0.1.0 (/opt/rustwide/workdir/2019)
[INFO] [stderr]    Compiling anyhow v1.0.34
[INFO] [stderr]     Checking regex-syntax v0.6.4
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling memchr v2.1.2
[INFO] [stderr]     Checking aoc_2020 v0.1.0 (/opt/rustwide/workdir/2020)
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking num_cpus v1.9.0
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking regex v1.1.0
[INFO] [stderr]     Checking aoc_2018 v0.1.0 (/opt/rustwide/workdir/2018)
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a function that returns `Result`
[INFO] [stdout]    --> 2018/src/bin/day13/main.rs:113:45
[INFO] [stdout]     |
[INFO] [stdout] 40  | / fn main() -> Result<()> {
[INFO] [stdout] 41  | |     let input = INPUT;
[INFO] [stdout] 42  | |     let mut turns = Turns::new();
[INFO] [stdout] 43  | |     let mut carts = Carts::new();
[INFO] [stdout] ...   |
[INFO] [stdout] 113 | |             first = *collisions.iter().min()?;
[INFO] [stdout]     | |                                             ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), aoc_2018::Error>`
[INFO] [stdout] ...   |
[INFO] [stdout] 121 | |     Ok(())
[INFO] [stdout] 122 | | }
[INFO] [stdout]     | |_- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[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]    --> 2018/src/bin/day13/main.rs:119:46
[INFO] [stdout]     |
[INFO] [stdout] 40  | / fn main() -> Result<()> {
[INFO] [stdout] 41  | |     let input = INPUT;
[INFO] [stdout] 42  | |     let mut turns = Turns::new();
[INFO] [stdout] 43  | |     let mut carts = Carts::new();
[INFO] [stdout] ...   |
[INFO] [stdout] 119 | |     println!("Part2: {}", carts.iter().next()?.0);
[INFO] [stdout]     | |                                              ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), aoc_2018::Error>`
[INFO] [stdout] 120 | |
[INFO] [stdout] 121 | |     Ok(())
[INFO] [stdout] 122 | | }
[INFO] [stdout]     | |_- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[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]    --> 2018/src/bin/day6/main.rs:101:15
[INFO] [stdout]     |
[INFO] [stdout] 57  | / fn part1(points: &[Point], bounds: Bounds) -> Result<usize> {
[INFO] [stdout] 58  | |     use std::sync::Mutex;
[INFO] [stdout] 59  | |     let results = Mutex::new(HashMap::<usize, usize>::new());
[INFO] [stdout] 60  | |     let disq = Mutex::new(HashSet::<usize>::new());
[INFO] [stdout] ...   |
[INFO] [stdout] 101 | |         .max()?)
[INFO] [stdout]     | |               ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] 102 | | }
[INFO] [stdout]     | |_- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `aoc_2018`
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a function that returns `Result`
[INFO] [stdout]   --> 2018/src/bin/day5/main.rs:50:43
[INFO] [stdout]    |
[INFO] [stdout] 30 | / fn part2(input: &str) -> Result<usize> {
[INFO] [stdout] 31 | |     use std::collections::HashMap;
[INFO] [stdout] 32 | |     let input = input.trim().as_bytes();
[INFO] [stdout] 33 | |     let mut all = HashMap::new();
[INFO] [stdout] ...  |
[INFO] [stdout] 50 | |     Ok(all.values().map(|v| v.len()).min()?)
[INFO] [stdout]    | |                                           ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] 51 | | }
[INFO] [stdout]    | |_- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]    = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]    --> 2018/src/bin/day6/main.rs:128:32
[INFO] [stdout]     |
[INFO] [stdout] 122 | /     fn from_str(s: &str) -> Result<Point> {
[INFO] [stdout] 123 | |         let mut parts = s.split(", ");
[INFO] [stdout] 124 | |         if parts.clone().count() != 2 {
[INFO] [stdout] 125 | |             Err(err!("Expected 2 parts in Point::from_str()"))
[INFO] [stdout] ...   |
[INFO] [stdout] 128 | |                 x: parts.next()?.parse()?,
[INFO] [stdout]     | |                                ^ use `.ok_or(...)?` to provide an error compatible with `Result<Point, aoc_2018::Error>`
[INFO] [stdout] ...   |
[INFO] [stdout] 131 | |         }
[INFO] [stdout] 132 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<Point, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[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]    --> 2018/src/bin/day6/main.rs:129:32
[INFO] [stdout]     |
[INFO] [stdout] 122 | /     fn from_str(s: &str) -> Result<Point> {
[INFO] [stdout] 123 | |         let mut parts = s.split(", ");
[INFO] [stdout] 124 | |         if parts.clone().count() != 2 {
[INFO] [stdout] 125 | |             Err(err!("Expected 2 parts in Point::from_str()"))
[INFO] [stdout] ...   |
[INFO] [stdout] 129 | |                 y: parts.next()?.parse()?,
[INFO] [stdout]     | |                                ^ use `.ok_or(...)?` to provide an error compatible with `Result<Point, aoc_2018::Error>`
[INFO] [stdout] 130 | |             })
[INFO] [stdout] 131 | |         }
[INFO] [stdout] 132 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<Point, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[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]   --> 2018/src/bin/day9/main.rs:18:29
[INFO] [stdout]    |
[INFO] [stdout] 14 | / fn part1(n_players: usize, last_marble_score: usize) -> Result<usize> {
[INFO] [stdout] 15 | |     let mut players = vec![0; n_players];
[INFO] [stdout] 16 | |     let marble_count = last_marble_score + 1;
[INFO] [stdout] 17 | |     play_game(&mut players, marble_count);
[INFO] [stdout] 18 | |     Ok(*players.iter().max()?)
[INFO] [stdout]    | |                             ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] 19 | | }
[INFO] [stdout]    | |_- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]    = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[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]    --> 2018/src/bin/day6/main.rs:101:15
[INFO] [stdout]     |
[INFO] [stdout] 57  | / fn part1(points: &[Point], bounds: Bounds) -> Result<usize> {
[INFO] [stdout] 58  | |     use std::sync::Mutex;
[INFO] [stdout] 59  | |     let results = Mutex::new(HashMap::<usize, usize>::new());
[INFO] [stdout] 60  | |     let disq = Mutex::new(HashSet::<usize>::new());
[INFO] [stdout] ...   |
[INFO] [stdout] 101 | |         .max()?)
[INFO] [stdout]     | |               ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] 102 | | }
[INFO] [stdout]     | |_- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[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]    --> 2018/src/bin/day6/main.rs:128:32
[INFO] [stdout]     |
[INFO] [stdout] 122 | /     fn from_str(s: &str) -> Result<Point> {
[INFO] [stdout] 123 | |         let mut parts = s.split(", ");
[INFO] [stdout] 124 | |         if parts.clone().count() != 2 {
[INFO] [stdout] 125 | |             Err(err!("Expected 2 parts in Point::from_str()"))
[INFO] [stdout] ...   |
[INFO] [stdout] 128 | |                 x: parts.next()?.parse()?,
[INFO] [stdout]     | |                                ^ use `.ok_or(...)?` to provide an error compatible with `Result<Point, aoc_2018::Error>`
[INFO] [stdout] ...   |
[INFO] [stdout] 131 | |         }
[INFO] [stdout] 132 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<Point, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[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]    --> 2018/src/bin/day6/main.rs:129:32
[INFO] [stdout]     |
[INFO] [stdout] 122 | /     fn from_str(s: &str) -> Result<Point> {
[INFO] [stdout] 123 | |         let mut parts = s.split(", ");
[INFO] [stdout] 124 | |         if parts.clone().count() != 2 {
[INFO] [stdout] 125 | |             Err(err!("Expected 2 parts in Point::from_str()"))
[INFO] [stdout] ...   |
[INFO] [stdout] 129 | |                 y: parts.next()?.parse()?,
[INFO] [stdout]     | |                                ^ use `.ok_or(...)?` to provide an error compatible with `Result<Point, aoc_2018::Error>`
[INFO] [stdout] 130 | |             })
[INFO] [stdout] 131 | |         }
[INFO] [stdout] 132 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<Point, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[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]   --> 2018/src/bin/day7/main.rs:51:45
[INFO] [stdout]    |
[INFO] [stdout] 31 | / fn part1(input: &str) -> Result<String> {
[INFO] [stdout] 32 | |     type DepMap = BTreeMap<u8, BTreeSet<u8>>;
[INFO] [stdout] 33 | |     fn step(dep_map: &mut DepMap) -> u8 {
[INFO] [stdout] 34 | |         // #[allow(clippy::clippy::skip_while_next)]
[INFO] [stdout] ...  |
[INFO] [stdout] 51 | |         let caps = LINE_REGEX.captures(line)?;
[INFO] [stdout]    | |                                             ^ use `.ok_or(...)?` to provide an error compatible with `Result<String, aoc_2018::Error>`
[INFO] [stdout] ...  |
[INFO] [stdout] 60 | |     Ok(out)
[INFO] [stdout] 61 | | }
[INFO] [stdout]    | |_- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<String, aoc_2018::Error>`
[INFO] [stdout]    = note: required by `from_residual`
[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]   --> 2018/src/bin/day9/main.rs:18:29
[INFO] [stdout]    |
[INFO] [stdout] 14 | / fn part1(n_players: usize, last_marble_score: usize) -> Result<usize> {
[INFO] [stdout] 15 | |     let mut players = vec![0; n_players];
[INFO] [stdout] 16 | |     let marble_count = last_marble_score + 1;
[INFO] [stdout] 17 | |     play_game(&mut players, marble_count);
[INFO] [stdout] 18 | |     Ok(*players.iter().max()?)
[INFO] [stdout]    | |                             ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] 19 | | }
[INFO] [stdout]    | |_- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]    = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[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]   --> 2018/src/bin/day7/main.rs:52:37
[INFO] [stdout]    |
[INFO] [stdout] 31 | / fn part1(input: &str) -> Result<String> {
[INFO] [stdout] 32 | |     type DepMap = BTreeMap<u8, BTreeSet<u8>>;
[INFO] [stdout] 33 | |     fn step(dep_map: &mut DepMap) -> u8 {
[INFO] [stdout] 34 | |         // #[allow(clippy::clippy::skip_while_next)]
[INFO] [stdout] ...  |
[INFO] [stdout] 52 | |         let node = caps.name("node")?.as_str().as_bytes()[0];
[INFO] [stdout]    | |                                     ^ use `.ok_or(...)?` to provide an error compatible with `Result<String, aoc_2018::Error>`
[INFO] [stdout] ...  |
[INFO] [stdout] 60 | |     Ok(out)
[INFO] [stdout] 61 | | }
[INFO] [stdout]    | |_- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<String, aoc_2018::Error>`
[INFO] [stdout]    = note: required by `from_residual`
[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]   --> 2018/src/bin/day7/main.rs:53:37
[INFO] [stdout]    |
[INFO] [stdout] 31 | / fn part1(input: &str) -> Result<String> {
[INFO] [stdout] 32 | |     type DepMap = BTreeMap<u8, BTreeSet<u8>>;
[INFO] [stdout] 33 | |     fn step(dep_map: &mut DepMap) -> u8 {
[INFO] [stdout] 34 | |         // #[allow(clippy::clippy::skip_while_next)]
[INFO] [stdout] ...  |
[INFO] [stdout] 53 | |         let need = caps.name("need")?.as_str().as_bytes()[0];
[INFO] [stdout]    | |                                     ^ use `.ok_or(...)?` to provide an error compatible with `Result<String, aoc_2018::Error>`
[INFO] [stdout] ...  |
[INFO] [stdout] 60 | |     Ok(out)
[INFO] [stdout] 61 | | }
[INFO] [stdout]    | |_- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<String, aoc_2018::Error>`
[INFO] [stdout]    = note: required by `from_residual`
[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]    --> 2018/src/bin/day7/main.rs:113:45
[INFO] [stdout]     |
[INFO] [stdout] 63  | / fn part2(input: &str, worker_count: usize) -> Result<usize> {
[INFO] [stdout] 64  | |     #[derive(PartialEq)]
[INFO] [stdout] 65  | |     enum Status {
[INFO] [stdout] 66  | |         HaveNeeds(BTreeSet<u8>),
[INFO] [stdout] ...   |
[INFO] [stdout] 113 | |         let caps = LINE_REGEX.captures(line)?;
[INFO] [stdout]     | |                                             ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] ...   |
[INFO] [stdout] 202 | |     }
[INFO] [stdout] 203 | | }
[INFO] [stdout]     | |_- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[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]    --> 2018/src/bin/day7/main.rs:114:37
[INFO] [stdout]     |
[INFO] [stdout] 63  | / fn part2(input: &str, worker_count: usize) -> Result<usize> {
[INFO] [stdout] 64  | |     #[derive(PartialEq)]
[INFO] [stdout] 65  | |     enum Status {
[INFO] [stdout] 66  | |         HaveNeeds(BTreeSet<u8>),
[INFO] [stdout] ...   |
[INFO] [stdout] 114 | |         let node = caps.name("node")?.as_str().as_bytes()[0];
[INFO] [stdout]     | |                                     ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] ...   |
[INFO] [stdout] 202 | |     }
[INFO] [stdout] 203 | | }
[INFO] [stdout]     | |_- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[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]    --> 2018/src/bin/day7/main.rs:115:37
[INFO] [stdout]     |
[INFO] [stdout] 63  | / fn part2(input: &str, worker_count: usize) -> Result<usize> {
[INFO] [stdout] 64  | |     #[derive(PartialEq)]
[INFO] [stdout] 65  | |     enum Status {
[INFO] [stdout] 66  | |         HaveNeeds(BTreeSet<u8>),
[INFO] [stdout] ...   |
[INFO] [stdout] 115 | |         let need = caps.name("need")?.as_str().as_bytes()[0];
[INFO] [stdout]     | |                                     ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] ...   |
[INFO] [stdout] 202 | |     }
[INFO] [stdout] 203 | | }
[INFO] [stdout]     | |_- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[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]    --> 2018/src/bin/day7/main.rs:197:23
[INFO] [stdout]     |
[INFO] [stdout] 144 | /     fn tick(dep_map: &mut DepMap, workers: &mut Vec<Worker>, todo: &mut Vec<u8>) -> Result<usize> {
[INFO] [stdout] 145 | |         let &passing_time = workers
[INFO] [stdout] 146 | |             .iter()
[INFO] [stdout] 147 | |             .filter(|w| w.is_working())
[INFO] [stdout] ...   |
[INFO] [stdout] 197 | |                 .max()?;
[INFO] [stdout]     | |                       ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] ...   |
[INFO] [stdout] 201 | |         }
[INFO] [stdout] 202 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[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]    --> 2018/src/bin/day13/main.rs:113:45
[INFO] [stdout]     |
[INFO] [stdout] 40  | / fn main() -> Result<()> {
[INFO] [stdout] 41  | |     let input = INPUT;
[INFO] [stdout] 42  | |     let mut turns = Turns::new();
[INFO] [stdout] 43  | |     let mut carts = Carts::new();
[INFO] [stdout] ...   |
[INFO] [stdout] 113 | |             first = *collisions.iter().min()?;
[INFO] [stdout]     | |                                             ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), aoc_2018::Error>`
[INFO] [stdout] ...   |
[INFO] [stdout] 121 | |     Ok(())
[INFO] [stdout] 122 | | }
[INFO] [stdout]     | |_- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[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]    --> 2018/src/bin/day13/main.rs:119:46
[INFO] [stdout]     |
[INFO] [stdout] 40  | / fn main() -> Result<()> {
[INFO] [stdout] 41  | |     let input = INPUT;
[INFO] [stdout] 42  | |     let mut turns = Turns::new();
[INFO] [stdout] 43  | |     let mut carts = Carts::new();
[INFO] [stdout] ...   |
[INFO] [stdout] 119 | |     println!("Part2: {}", carts.iter().next()?.0);
[INFO] [stdout]     | |                                              ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), aoc_2018::Error>`
[INFO] [stdout] 120 | |
[INFO] [stdout] 121 | |     Ok(())
[INFO] [stdout] 122 | | }
[INFO] [stdout]     | |_- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[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]   --> 2018/src/bin/day7/main.rs:51:45
[INFO] [stdout]    |
[INFO] [stdout] 31 | / fn part1(input: &str) -> Result<String> {
[INFO] [stdout] 32 | |     type DepMap = BTreeMap<u8, BTreeSet<u8>>;
[INFO] [stdout] 33 | |     fn step(dep_map: &mut DepMap) -> u8 {
[INFO] [stdout] 34 | |         // #[allow(clippy::clippy::skip_while_next)]
[INFO] [stdout] ...  |
[INFO] [stdout] 51 | |         let caps = LINE_REGEX.captures(line)?;
[INFO] [stdout]    | |                                             ^ use `.ok_or(...)?` to provide an error compatible with `Result<String, aoc_2018::Error>`
[INFO] [stdout] ...  |
[INFO] [stdout] 60 | |     Ok(out)
[INFO] [stdout] 61 | | }
[INFO] [stdout]    | |_- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<String, aoc_2018::Error>`
[INFO] [stdout]    = note: required by `from_residual`
[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]   --> 2018/src/bin/day5/main.rs:50:43
[INFO] [stdout]    |
[INFO] [stdout] 30 | / fn part2(input: &str) -> Result<usize> {
[INFO] [stdout] 31 | |     use std::collections::HashMap;
[INFO] [stdout] 32 | |     let input = input.trim().as_bytes();
[INFO] [stdout] 33 | |     let mut all = HashMap::new();
[INFO] [stdout] ...  |
[INFO] [stdout] 50 | |     Ok(all.values().map(|v| v.len()).min()?)
[INFO] [stdout]    | |                                           ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] 51 | | }
[INFO] [stdout]    | |_- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]    = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[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]   --> 2018/src/bin/day7/main.rs:52:37
[INFO] [stdout]    |
[INFO] [stdout] 31 | / fn part1(input: &str) -> Result<String> {
[INFO] [stdout] 32 | |     type DepMap = BTreeMap<u8, BTreeSet<u8>>;
[INFO] [stdout] 33 | |     fn step(dep_map: &mut DepMap) -> u8 {
[INFO] [stdout] 34 | |         // #[allow(clippy::clippy::skip_while_next)]
[INFO] [stdout] ...  |
[INFO] [stdout] 52 | |         let node = caps.name("node")?.as_str().as_bytes()[0];
[INFO] [stdout]    | |                                     ^ use `.ok_or(...)?` to provide an error compatible with `Result<String, aoc_2018::Error>`
[INFO] [stdout] ...  |
[INFO] [stdout] 60 | |     Ok(out)
[INFO] [stdout] 61 | | }
[INFO] [stdout]    | |_- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<String, aoc_2018::Error>`
[INFO] [stdout]    = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[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]   --> 2018/src/bin/day7/main.rs:53:37
[INFO] [stdout]    |
[INFO] [stdout] 31 | / fn part1(input: &str) -> Result<String> {
[INFO] [stdout] 32 | |     type DepMap = BTreeMap<u8, BTreeSet<u8>>;
[INFO] [stdout] 33 | |     fn step(dep_map: &mut DepMap) -> u8 {
[INFO] [stdout] 34 | |         // #[allow(clippy::clippy::skip_while_next)]
[INFO] [stdout] ...  |
[INFO] [stdout] 53 | |         let need = caps.name("need")?.as_str().as_bytes()[0];
[INFO] [stdout]    | |                                     ^ use `.ok_or(...)?` to provide an error compatible with `Result<String, aoc_2018::Error>`
[INFO] [stdout] ...  |
[INFO] [stdout] 60 | |     Ok(out)
[INFO] [stdout] 61 | | }
[INFO] [stdout]    | |_- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<String, aoc_2018::Error>`
[INFO] [stdout]    = note: required by `from_residual`
[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]    --> 2018/src/bin/day7/main.rs:113:45
[INFO] [stdout]     |
[INFO] [stdout] 63  | / fn part2(input: &str, worker_count: usize) -> Result<usize> {
[INFO] [stdout] 64  | |     #[derive(PartialEq)]
[INFO] [stdout] 65  | |     enum Status {
[INFO] [stdout] 66  | |         HaveNeeds(BTreeSet<u8>),
[INFO] [stdout] ...   |
[INFO] [stdout] 113 | |         let caps = LINE_REGEX.captures(line)?;
[INFO] [stdout]     | |                                             ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] ...   |
[INFO] [stdout] 202 | |     }
[INFO] [stdout] 203 | | }
[INFO] [stdout]     | |_- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[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]    --> 2018/src/bin/day7/main.rs:114:37
[INFO] [stdout]     |
[INFO] [stdout] 63  | / fn part2(input: &str, worker_count: usize) -> Result<usize> {
[INFO] [stdout] 64  | |     #[derive(PartialEq)]
[INFO] [stdout] 65  | |     enum Status {
[INFO] [stdout] 66  | |         HaveNeeds(BTreeSet<u8>),
[INFO] [stdout] ...   |
[INFO] [stdout] 114 | |         let node = caps.name("node")?.as_str().as_bytes()[0];
[INFO] [stdout]     | |                                     ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] ...   |
[INFO] [stdout] 202 | |     }
[INFO] [stdout] 203 | | }
[INFO] [stdout]     | |_- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[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]    --> 2018/src/bin/day7/main.rs:115:37
[INFO] [stdout]     |
[INFO] [stdout] 63  | / fn part2(input: &str, worker_count: usize) -> Result<usize> {
[INFO] [stdout] 64  | |     #[derive(PartialEq)]
[INFO] [stdout] 65  | |     enum Status {
[INFO] [stdout] 66  | |         HaveNeeds(BTreeSet<u8>),
[INFO] [stdout] ...   |
[INFO] [stdout] 115 | |         let need = caps.name("need")?.as_str().as_bytes()[0];
[INFO] [stdout]     | |                                     ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] ...   |
[INFO] [stdout] 202 | |     }
[INFO] [stdout] 203 | | }
[INFO] [stdout]     | |_- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[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]    --> 2018/src/bin/day7/main.rs:197:23
[INFO] [stdout]     |
[INFO] [stdout] 144 | /     fn tick(dep_map: &mut DepMap, workers: &mut Vec<Worker>, todo: &mut Vec<u8>) -> Result<usize> {
[INFO] [stdout] 145 | |         let &passing_time = workers
[INFO] [stdout] 146 | |             .iter()
[INFO] [stdout] 147 | |             .filter(|w| w.is_working())
[INFO] [stdout] ...   |
[INFO] [stdout] 197 | |                 .max()?;
[INFO] [stdout]     | |                       ^ use `.ok_or(...)?` to provide an error compatible with `Result<usize, aoc_2018::Error>`
[INFO] [stdout] ...   |
[INFO] [stdout] 201 | |         }
[INFO] [stdout] 202 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<usize, aoc_2018::Error>`
[INFO] [stdout]     = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7865fe3fd40e4041f0704ca35e655e55977588b003cafe6c83af5e25f77cc432", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7865fe3fd40e4041f0704ca35e655e55977588b003cafe6c83af5e25f77cc432", kill_on_drop: false }`
[INFO] [stdout] 7865fe3fd40e4041f0704ca35e655e55977588b003cafe6c83af5e25f77cc432