[INFO] cloning repository https://github.com/LiamOW/RustyCalculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LiamOW/RustyCalculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiamOW%2FRustyCalculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiamOW%2FRustyCalculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 161648464c208333d2d331363f63468c27cbee47
[INFO] testing LiamOW/RustyCalculator against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiamOW%2FRustyCalculator" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LiamOW/RustyCalculator 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/LiamOW/RustyCalculator
[INFO] finished tweaking git repo https://github.com/LiamOW/RustyCalculator
[INFO] tweaked toml for git repo https://github.com/LiamOW/RustyCalculator written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/LiamOW/RustyCalculator 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] e35217c0944f4d93f7b05dc7103df7ae023d1900300092c2936d61bc97aa2c6e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e35217c0944f4d93f7b05dc7103df7ae023d1900300092c2936d61bc97aa2c6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e35217c0944f4d93f7b05dc7103df7ae023d1900300092c2936d61bc97aa2c6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e35217c0944f4d93f7b05dc7103df7ae023d1900300092c2936d61bc97aa2c6e", kill_on_drop: false }`
[INFO] [stdout] e35217c0944f4d93f7b05dc7103df7ae023d1900300092c2936d61bc97aa2c6e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] ab176f5126f869530f5c5344d7f7cda3cf7f954c4977f65cb22784a0832471a1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ab176f5126f869530f5c5344d7f7cda3cf7f954c4977f65cb22784a0832471a1", kill_on_drop: false }`
[INFO] [stderr]    Compiling subtle v2.2.3
[INFO] [stderr]    Compiling zeroize v1.1.0
[INFO] [stderr]    Compiling unic-common v0.7.0
[INFO] [stderr]    Compiling unic-char-range v0.7.0
[INFO] [stderr]    Compiling humansize v1.1.0
[INFO] [stderr]    Compiling calculator v0.1.0 (/opt/rustwide/workdir/calculator)
[INFO] [stderr]    Compiling pear_codegen v0.1.4
[INFO] [stderr]    Compiling indexmap v1.5.2
[INFO] [stderr]    Compiling rocket_codegen v0.4.5
[INFO] [stderr]    Compiling rocket v0.4.5
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling inotify-sys v0.1.3
[INFO] [stderr]    Compiling dirs-sys v0.3.5
[INFO] [stderr]    Compiling filetime v0.2.12
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stdout] error[E0432]: unresolved import `std::option::NoneError`
[INFO] [stdout]  --> calculator/src/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]  --> calculator/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(box_syntax)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> calculator/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling block-cipher-trait v0.6.2
[INFO] [stderr]    Compiling aead v0.2.0
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling universal-hash v0.3.0
[INFO] [stderr]    Compiling unic-ucd-version v0.7.0
[INFO] [stdout] error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a method that returns `Result`
[INFO] [stdout]   --> calculator/src/parser.rs:30:31
[INFO] [stdout]    |
[INFO] [stdout] 28 | /     pub fn new(source: &'a str) -> Result<Self, ParseError> {
[INFO] [stdout] 29 | |         let mut lexer = Lexer::new(source);
[INFO] [stdout] 30 | |         let cur = lexer.next()?;
[INFO] [stdout]    | |                               ^ use `.ok_or(...)?` to provide an error compatible with `Result<Parser<'a>, ParseError>`
[INFO] [stdout] 31 | |         let peek = lexer.next()?;
[INFO] [stdout] ...  |
[INFO] [stdout] 37 | |         })
[INFO] [stdout] 38 | |     }
[INFO] [stdout]    | |_____- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<Parser<'a>, 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]   --> calculator/src/parser.rs:31:32
[INFO] [stdout]    |
[INFO] [stdout] 28 | /     pub fn new(source: &'a str) -> Result<Self, ParseError> {
[INFO] [stdout] 29 | |         let mut lexer = Lexer::new(source);
[INFO] [stdout] 30 | |         let cur = lexer.next()?;
[INFO] [stdout] 31 | |         let peek = lexer.next()?;
[INFO] [stdout]    | |                                ^ use `.ok_or(...)?` to provide an error compatible with `Result<Parser<'a>, ParseError>`
[INFO] [stdout] ...  |
[INFO] [stdout] 37 | |         })
[INFO] [stdout] 38 | |     }
[INFO] [stdout]    | |_____- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<Parser<'a>, 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]   --> calculator/src/parser.rs:43:44
[INFO] [stdout]    |
[INFO] [stdout] 41 | /     fn next_token(&mut self) -> Result<(), ParseError> {
[INFO] [stdout] 42 | |         self.current_token = self.peek_token.clone();
[INFO] [stdout] 43 | |         self.peek_token = self.lexer.next()?;
[INFO] [stdout]    | |                                            ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), ParseError>`
[INFO] [stdout] 44 | |         Ok(())
[INFO] [stdout] 45 | |     }
[INFO] [stdout]    | |_____- this function returns a `Result`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), ParseError>`
[INFO] [stdout]    = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[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 `calculator`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ab176f5126f869530f5c5344d7f7cda3cf7f954c4977f65cb22784a0832471a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab176f5126f869530f5c5344d7f7cda3cf7f954c4977f65cb22784a0832471a1", kill_on_drop: false }`
[INFO] [stdout] ab176f5126f869530f5c5344d7f7cda3cf7f954c4977f65cb22784a0832471a1
