[INFO] fetching crate ley 0.0.5...
[INFO] checking ley-0.0.5 against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] extracting crate ley 0.0.5 into /workspace/builds/worker-116/source
[INFO] validating manifest of crates.io crate ley 0.0.5 on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ley 0.0.5
[INFO] finished tweaking crates.io crate ley 0.0.5
[INFO] tweaked toml for crates.io crate ley 0.0.5 written to /workspace/builds/worker-116/source/Cargo.toml
[INFO] crate crates.io crate ley 0.0.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1a694b73ed0b81cd912586a5e666f8a5ee2199b1d63cc30faa955037abe467a4
[INFO] running `Command { std: "docker" "start" "-a" "1a694b73ed0b81cd912586a5e666f8a5ee2199b1d63cc30faa955037abe467a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1a694b73ed0b81cd912586a5e666f8a5ee2199b1d63cc30faa955037abe467a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a694b73ed0b81cd912586a5e666f8a5ee2199b1d63cc30faa955037abe467a4", kill_on_drop: false }`
[INFO] [stdout] 1a694b73ed0b81cd912586a5e666f8a5ee2199b1d63cc30faa955037abe467a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6cffc96846b52636fbc861f7caf7db73ad33043cb50ab742d9feee98b819aab0
[INFO] running `Command { std: "docker" "start" "-a" "6cffc96846b52636fbc861f7caf7db73ad33043cb50ab742d9feee98b819aab0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking ley v0.0.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0412]: cannot find type `NoneError` in module `std::option`
[INFO] [stdout]    --> src/ley.rs:427:28
[INFO] [stdout]     |
[INFO] [stdout] 427 | impl<'a> From<std::option::NoneError> for ParseError<'a> {
[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/ley.rs:428:29
[INFO] [stdout]     |
[INFO] [stdout] 428 |     fn from(_: std::option::NoneError) -> Self {
[INFO] [stdout]     |                             ^^^^^^^^^ not found in `std::option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::VecDeque`
[INFO] [stdout]  --> src/main.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{collections::VecDeque, env, fs::{File, read_dir}, io::{Read, Write}, path::Path};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/fmt.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fmt::Display, fs::File, io::{self, Write}, path::PathBuf};
[INFO] [stdout]   |                                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/fmt.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `NoneError` in module `std::option`
[INFO] [stdout]    --> src/ley.rs:427:28
[INFO] [stdout]     |
[INFO] [stdout] 427 | impl<'a> From<std::option::NoneError> for ParseError<'a> {
[INFO] [stdout]     |                            ^^^^^^^^^ not found in `std::option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::catch`
[INFO] [stdout]  --> src/fmt.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use super::catch;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `NoneError` in module `std::option`
[INFO] [stdout]    --> src/ley.rs:428:29
[INFO] [stdout]     |
[INFO] [stdout] 428 |     fn from(_: std::option::NoneError) -> Self {
[INFO] [stdout]     |                             ^^^^^^^^^ not found in `std::option`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `collections::VecDeque`
[INFO] [stdout]  --> src/main.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{collections::VecDeque, env, fs::{File, read_dir}, io::{Read, Write}, path::Path};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/fmt.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{fmt::Display, fs::File, io::{self, Write}, path::PathBuf};
[INFO] [stdout]   |                                        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/fmt.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::catch`
[INFO] [stdout]  --> src/fmt.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use super::catch;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> src/ley.rs:24:19
[INFO] [stdout]     |
[INFO] [stdout] 24  |             match LeyLine::parse(&mut token_stream)? {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type for enum `ParseError<'_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `ParseError<'_>: From<ParseError<'_>>`
[INFO] [stdout]     = note: required because of the requirements on the impl of `FromResidual<Result<Infallible, ParseError<'_>>>` for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] note: required by `branch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> src/ley.rs:103:28
[INFO] [stdout]     |
[INFO] [stdout] 103 |             ley_lines.push(LeyLine::parse(&mut token_stream)?)
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type for enum `ParseError<'_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `ParseError<'_>: From<ParseError<'_>>`
[INFO] [stdout]     = note: required because of the requirements on the impl of `FromResidual<Result<Infallible, ParseError<'_>>>` for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] note: required by `branch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> src/ley.rs:24:19
[INFO] [stdout]     |
[INFO] [stdout] 24  |             match LeyLine::parse(&mut token_stream)? {
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type for enum `ParseError<'_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `ParseError<'_>: From<ParseError<'_>>`
[INFO] [stdout]     = note: required because of the requirements on the impl of `FromResidual<Result<Infallible, ParseError<'_>>>` for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] note: required by `branch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0283]: type annotations needed
[INFO] [stdout]    --> src/ley.rs:103:28
[INFO] [stdout]     |
[INFO] [stdout] 103 |             ley_lines.push(LeyLine::parse(&mut token_stream)?)
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type for enum `ParseError<'_>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: cannot satisfy `ParseError<'_>: From<ParseError<'_>>`
[INFO] [stdout]     = note: required because of the requirements on the impl of `FromResidual<Result<Infallible, ParseError<'_>>>` for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] note: required by `branch`
[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/ley.rs:137:34
[INFO] [stdout]     |
[INFO] [stdout] 135 | /     pub fn parse(token_stream: &mut TokenIter<'a, '_, '_>) -> Result<Self, ParseError<'a>> {
[INFO] [stdout] 136 | |         use Token::*;
[INFO] [stdout] 137 | |         match token_stream.next()? {
[INFO] [stdout]     | |                                  ^ use `.ok_or(...)?` to provide an error compatible with `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] 138 | |             Exclamation => {
[INFO] [stdout] ...   |
[INFO] [stdout] 182 | |         }
[INFO] [stdout] 183 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[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]    --> src/ley.rs:140:56
[INFO] [stdout]     |
[INFO] [stdout] 135 | /     pub fn parse(token_stream: &mut TokenIter<'a, '_, '_>) -> Result<Self, ParseError<'a>> {
[INFO] [stdout] 136 | |         use Token::*;
[INFO] [stdout] 137 | |         match token_stream.next()? {
[INFO] [stdout] 138 | |             Exclamation => {
[INFO] [stdout] 139 | |                 let name = String::<'a>::parse(token_stream);
[INFO] [stdout] 140 | |                 let comment = match token_stream.next()? {
[INFO] [stdout]     | |                                                        ^ use `.ok_or(...)?` to provide an error compatible with `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] ...   |
[INFO] [stdout] 182 | |         }
[INFO] [stdout] 183 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[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]    --> src/ley.rs:145:53
[INFO] [stdout]     |
[INFO] [stdout] 135 | /     pub fn parse(token_stream: &mut TokenIter<'a, '_, '_>) -> Result<Self, ParseError<'a>> {
[INFO] [stdout] 136 | |         use Token::*;
[INFO] [stdout] 137 | |         match token_stream.next()? {
[INFO] [stdout] 138 | |             Exclamation => {
[INFO] [stdout] ...   |
[INFO] [stdout] 145 | |                 let kind = match token_stream.next()? {
[INFO] [stdout]     | |                                                     ^ use `.ok_or(...)?` to provide an error compatible with `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] ...   |
[INFO] [stdout] 182 | |         }
[INFO] [stdout] 183 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[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]    --> src/ley.rs:147:48
[INFO] [stdout]     |
[INFO] [stdout] 135 | /     pub fn parse(token_stream: &mut TokenIter<'a, '_, '_>) -> Result<Self, ParseError<'a>> {
[INFO] [stdout] 136 | |         use Token::*;
[INFO] [stdout] 137 | |         match token_stream.next()? {
[INFO] [stdout] 138 | |             Exclamation => {
[INFO] [stdout] ...   |
[INFO] [stdout] 147 | |                         if *token_stream.next()? != Token::OpenBrace {
[INFO] [stdout]     | |                                                ^ use `.ok_or(...)?` to provide an error compatible with `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] ...   |
[INFO] [stdout] 182 | |         }
[INFO] [stdout] 183 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[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]    --> src/ley.rs:160:43
[INFO] [stdout]     |
[INFO] [stdout] 135 | /     pub fn parse(token_stream: &mut TokenIter<'a, '_, '_>) -> Result<Self, ParseError<'a>> {
[INFO] [stdout] 136 | |         use Token::*;
[INFO] [stdout] 137 | |         match token_stream.next()? {
[INFO] [stdout] 138 | |             Exclamation => {
[INFO] [stdout] ...   |
[INFO] [stdout] 160 | |                 while *token_stream.peek()? != CloseBrace {
[INFO] [stdout]     | |                                           ^ use `.ok_or(...)?` to provide an error compatible with `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] ...   |
[INFO] [stdout] 182 | |         }
[INFO] [stdout] 183 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[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]    --> src/ley.rs:137:34
[INFO] [stdout]     |
[INFO] [stdout] 135 | /     pub fn parse(token_stream: &mut TokenIter<'a, '_, '_>) -> Result<Self, ParseError<'a>> {
[INFO] [stdout] 136 | |         use Token::*;
[INFO] [stdout] 137 | |         match token_stream.next()? {
[INFO] [stdout]     | |                                  ^ use `.ok_or(...)?` to provide an error compatible with `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] 138 | |             Exclamation => {
[INFO] [stdout] ...   |
[INFO] [stdout] 182 | |         }
[INFO] [stdout] 183 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[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]    --> src/ley.rs:140:56
[INFO] [stdout]     |
[INFO] [stdout] 135 | /     pub fn parse(token_stream: &mut TokenIter<'a, '_, '_>) -> Result<Self, ParseError<'a>> {
[INFO] [stdout] 136 | |         use Token::*;
[INFO] [stdout] 137 | |         match token_stream.next()? {
[INFO] [stdout] 138 | |             Exclamation => {
[INFO] [stdout] 139 | |                 let name = String::<'a>::parse(token_stream);
[INFO] [stdout] 140 | |                 let comment = match token_stream.next()? {
[INFO] [stdout]     | |                                                        ^ use `.ok_or(...)?` to provide an error compatible with `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] ...   |
[INFO] [stdout] 182 | |         }
[INFO] [stdout] 183 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[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]    --> src/ley.rs:145:53
[INFO] [stdout]     |
[INFO] [stdout] 135 | /     pub fn parse(token_stream: &mut TokenIter<'a, '_, '_>) -> Result<Self, ParseError<'a>> {
[INFO] [stdout] 136 | |         use Token::*;
[INFO] [stdout] 137 | |         match token_stream.next()? {
[INFO] [stdout] 138 | |             Exclamation => {
[INFO] [stdout] ...   |
[INFO] [stdout] 145 | |                 let kind = match token_stream.next()? {
[INFO] [stdout]     | |                                                     ^ use `.ok_or(...)?` to provide an error compatible with `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] ...   |
[INFO] [stdout] 182 | |         }
[INFO] [stdout] 183 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[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]    --> src/ley.rs:147:48
[INFO] [stdout]     |
[INFO] [stdout] 135 | /     pub fn parse(token_stream: &mut TokenIter<'a, '_, '_>) -> Result<Self, ParseError<'a>> {
[INFO] [stdout] 136 | |         use Token::*;
[INFO] [stdout] 137 | |         match token_stream.next()? {
[INFO] [stdout] 138 | |             Exclamation => {
[INFO] [stdout] ...   |
[INFO] [stdout] 147 | |                         if *token_stream.next()? != Token::OpenBrace {
[INFO] [stdout]     | |                                                ^ use `.ok_or(...)?` to provide an error compatible with `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] ...   |
[INFO] [stdout] 182 | |         }
[INFO] [stdout] 183 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 9 previous errors; 4 warnings emitted
[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/ley.rs:160:43
[INFO] [stdout]     |
[INFO] [stdout] 135 | /     pub fn parse(token_stream: &mut TokenIter<'a, '_, '_>) -> Result<Self, ParseError<'a>> {
[INFO] [stdout] 136 | |         use Token::*;
[INFO] [stdout] 137 | |         match token_stream.next()? {
[INFO] [stdout] 138 | |             Exclamation => {
[INFO] [stdout] ...   |
[INFO] [stdout] 160 | |                 while *token_stream.peek()? != CloseBrace {
[INFO] [stdout]     | |                                           ^ use `.ok_or(...)?` to provide an error compatible with `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] ...   |
[INFO] [stdout] 182 | |         }
[INFO] [stdout] 183 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<ley::LeyLine<'_>, ParseError<'_>>`
[INFO] [stdout] note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0283, E0412.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ley` due to 10 previous errors; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 9 previous errors; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0283, E0412.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "6cffc96846b52636fbc861f7caf7db73ad33043cb50ab742d9feee98b819aab0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cffc96846b52636fbc861f7caf7db73ad33043cb50ab742d9feee98b819aab0", kill_on_drop: false }`
[INFO] [stdout] 6cffc96846b52636fbc861f7caf7db73ad33043cb50ab742d9feee98b819aab0