[INFO] cloning repository https://github.com/noculture/wasl
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/noculture/wasl" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoculture%2Fwasl", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoculture%2Fwasl'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7569fa337a7a1777ebf7d5370694ade77e389894
[INFO] testing noculture/wasl against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoculture%2Fwasl" "/workspace/builds/worker-29/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-29/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/noculture/wasl 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 git repo https://github.com/noculture/wasl
[INFO] finished tweaking git repo https://github.com/noculture/wasl
[INFO] tweaked toml for git repo https://github.com/noculture/wasl written to /workspace/builds/worker-29/source/Cargo.toml
[INFO] crate git repo https://github.com/noculture/wasl 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-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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] 4f2d337601cfa745ecafd7a437aad11133dfc2c62612c346e709369b95ccc667
[INFO] running `Command { std: "docker" "start" "-a" "4f2d337601cfa745ecafd7a437aad11133dfc2c62612c346e709369b95ccc667", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f2d337601cfa745ecafd7a437aad11133dfc2c62612c346e709369b95ccc667", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f2d337601cfa745ecafd7a437aad11133dfc2c62612c346e709369b95ccc667", kill_on_drop: false }`
[INFO] [stdout] 4f2d337601cfa745ecafd7a437aad11133dfc2c62612c346e709369b95ccc667
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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] 457da09a8264b5ceb0d22a2f145f37572bac576443770f5f1740b7054f967f29
[INFO] running `Command { std: "docker" "start" "-a" "457da09a8264b5ceb0d22a2f145f37572bac576443770f5f1740b7054f967f29", kill_on_drop: false }`
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling wasl v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `std::option::NoneError`
[INFO] [stdout]  --> src/frontend/parser.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::option::NoneError;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^ no `NoneError` in `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(box_syntax, box_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::frontend::scanner::Lexeme::StringLiteral`
[INFO] [stdout]  --> src/codegen/emitter.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::frontend::scanner::Lexeme::StringLiteral;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::frontend::ast::Node::Constant`
[INFO] [stdout]  --> src/frontend/parser.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::frontend::ast::Node::Constant;
[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/frontend/parser.rs:45:29
[INFO] [stdout]    |
[INFO] [stdout] 38 | /     pub(crate) fn parse(&self) -> Result<Vec<Node>, ParseError> {
[INFO] [stdout] 39 | |         let mut tokens = match scan_into_peekable(self.source.to_owned()) {
[INFO] [stdout] 40 | |             Ok(tokens) => tokens,
[INFO] [stdout] 41 | |             Err(err) => return Err(ParseError::ScanError(err)),
[INFO] [stdout] ...  |
[INFO] [stdout] 45 | |         while (tokens.peek()?).lexeme != Lexeme::EOF {
[INFO] [stdout]    | |                             ^ use `.ok_or(...)?` to provide an error compatible with `Result<Vec<Node>, ParseError>`
[INFO] [stdout] ...  |
[INFO] [stdout] 48 | |         Ok(nodes)
[INFO] [stdout] 49 | |     }
[INFO] [stdout]    | |_____- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<Vec<Node>, 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/frontend/parser.rs:52:35
[INFO] [stdout]    |
[INFO] [stdout] 51 | /     fn parse_token_stream(&self, tokens: &mut TokenStream) -> Result<Node, ParseError> {
[INFO] [stdout] 52 | |         return match tokens.next()? {
[INFO] [stdout]    | |                                   ^ use `.ok_or(...)?` to provide an error compatible with `Result<Node, ParseError>`
[INFO] [stdout] 53 | |             Token {
[INFO] [stdout] 54 | |                 lexeme: Lexeme::LeftParen,
[INFO] [stdout] ...  |
[INFO] [stdout] 66 | |         };
[INFO] [stdout] 67 | |     }
[INFO] [stdout]    | |_____- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<Node, 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/frontend/parser.rs:85:45
[INFO] [stdout]     |
[INFO] [stdout] 79  | /     fn parse_function_definition(
[INFO] [stdout] 80  | |         &self,
[INFO] [stdout] 81  | |         token_stream: &mut TokenStream,
[INFO] [stdout] 82  | |     ) -> Result<Node, ParseError> {
[INFO] [stdout] ...   |
[INFO] [stdout] 85  | |         let name_token = token_stream.next()?;
[INFO] [stdout]     | |                                             ^ use `.ok_or(...)?` to provide an error compatible with `Result<Node, ParseError>`
[INFO] [stdout] ...   |
[INFO] [stdout] 125 | |         }
[INFO] [stdout] 126 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<Node, 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/frontend/parser.rs:103:53
[INFO] [stdout]     |
[INFO] [stdout] 79  | /     fn parse_function_definition(
[INFO] [stdout] 80  | |         &self,
[INFO] [stdout] 81  | |         token_stream: &mut TokenStream,
[INFO] [stdout] 82  | |     ) -> Result<Node, ParseError> {
[INFO] [stdout] ...   |
[INFO] [stdout] 103 | |         let next_element = match token_stream.next()? {
[INFO] [stdout]     | |                                                     ^ use `.ok_or(...)?` to provide an error compatible with `Result<Node, ParseError>`
[INFO] [stdout] ...   |
[INFO] [stdout] 125 | |         }
[INFO] [stdout] 126 | |     }
[INFO] [stdout]     | |_____- this function returns a `Result`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<Node, ParseError>`
[INFO] [stdout]     = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0432, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wasl`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "457da09a8264b5ceb0d22a2f145f37572bac576443770f5f1740b7054f967f29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "457da09a8264b5ceb0d22a2f145f37572bac576443770f5f1740b7054f967f29", kill_on_drop: false }`
[INFO] [stdout] 457da09a8264b5ceb0d22a2f145f37572bac576443770f5f1740b7054f967f29
