[INFO] fetching crate ley 0.0.5...
[INFO] testing ley-0.0.5 against 1.54.0 for beta-1.55-1
[INFO] extracting crate ley 0.0.5 into /workspace/builds/worker-23/source
[INFO] validating manifest of crates.io crate ley 0.0.5 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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-23/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" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8aa223ce4de83732914ee7c201dc7406f9bc3e3d6dba8bda66ba9734df0688fe
[INFO] running `Command { std: "docker" "start" "-a" "8aa223ce4de83732914ee7c201dc7406f9bc3e3d6dba8bda66ba9734df0688fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8aa223ce4de83732914ee7c201dc7406f9bc3e3d6dba8bda66ba9734df0688fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8aa223ce4de83732914ee7c201dc7406f9bc3e3d6dba8bda66ba9734df0688fe", kill_on_drop: false }`
[INFO] [stdout] 8aa223ce4de83732914ee7c201dc7406f9bc3e3d6dba8bda66ba9734df0688fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7338137ac5a074c138a32deaec2e4944f173c039c79cd5f47d62b153ec251188
[INFO] running `Command { std: "docker" "start" "-a" "7338137ac5a074c138a32deaec2e4944f173c039c79cd5f47d62b153ec251188", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[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[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: aborting due to 8 previous errors; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0412, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ley`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "7338137ac5a074c138a32deaec2e4944f173c039c79cd5f47d62b153ec251188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7338137ac5a074c138a32deaec2e4944f173c039c79cd5f47d62b153ec251188", kill_on_drop: false }`
[INFO] [stdout] 7338137ac5a074c138a32deaec2e4944f173c039c79cd5f47d62b153ec251188
