[INFO] cloning repository https://github.com/tiny-browserbook/exercise-css
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tiny-browserbook/exercise-css" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiny-browserbook%2Fexercise-css", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiny-browserbook%2Fexercise-css'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 19bff63871861db3d8735679d346ab91e8f00ec2
[INFO] checking tiny-browserbook/exercise-css against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftiny-browserbook%2Fexercise-css" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tiny-browserbook/exercise-css on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tiny-browserbook/exercise-css
[INFO] finished tweaking git repo https://github.com/tiny-browserbook/exercise-css
[INFO] tweaked toml for git repo https://github.com/tiny-browserbook/exercise-css written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tiny-browserbook/exercise-css already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c3ba4e9d1b096c058aabba34ff52c9ee5ca28ec428dd9ae0b95f9258fcbefec9
[INFO] running `Command { std: "docker" "start" "-a" "c3ba4e9d1b096c058aabba34ff52c9ee5ca28ec428dd9ae0b95f9258fcbefec9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3ba4e9d1b096c058aabba34ff52c9ee5ca28ec428dd9ae0b95f9258fcbefec9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3ba4e9d1b096c058aabba34ff52c9ee5ca28ec428dd9ae0b95f9258fcbefec9", kill_on_drop: false }`
[INFO] [stdout] c3ba4e9d1b096c058aabba34ff52c9ee5ca28ec428dd9ae0b95f9258fcbefec9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af7e11aca70f48e0d32313ab8e7c3d29d1364b88af5de0bdc3b708ef7a5c938e
[INFO] running `Command { std: "docker" "start" "-a" "af7e11aca70f48e0d32313ab8e7c3d29d1364b88af5de0bdc3b708ef7a5c938e", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking combine v4.5.2
[INFO] [stderr]     Checking exercise-css v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `choice`, `error::StreamError`, `letter`, `many1`, `many`, `newline`, `optional`, `sep_by`, `sep_end_by`, `space`
[INFO] [stdout]  --> src/css.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     choice,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 3 |     error::StreamError,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 |     many, many1, optional,
[INFO] [stdout]   |     ^^^^  ^^^^^  ^^^^^^^^
[INFO] [stdout] 5 |     parser::char::{self, char, letter, newline, space},
[INFO] [stdout]   |                                ^^^^^^  ^^^^^^^  ^^^^^
[INFO] [stdout] 6 |     sep_by, sep_end_by, ParseError, Parser, Stream,
[INFO] [stdout]   |     ^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `choice`, `error::StreamError`, `letter`, `many1`, `many`, `newline`, `optional`, `sep_by`, `sep_end_by`, `space`
[INFO] [stdout]  --> src/css.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     choice,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 3 |     error::StreamError,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 |     many, many1, optional,
[INFO] [stdout]   |     ^^^^  ^^^^^  ^^^^^^^^
[INFO] [stdout] 5 |     parser::char::{self, char, letter, newline, space},
[INFO] [stdout]   |                                ^^^^^^  ^^^^^^^  ^^^^^
[INFO] [stdout] 6 |     sep_by, sep_end_by, ParseError, Parser, Stream,
[INFO] [stdout]   |     ^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/css.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 97 |     todo!("you need to implement this");
[INFO] [stdout]    |     ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 98 |     (char(' ')).map(|_| vec![])
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/css.rs:107:5
[INFO] [stdout]     |
[INFO] [stdout] 106 |       todo!("you need to implement this");
[INFO] [stdout]     |       ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 107 | /     (char(' '),).map(|_| Rule {
[INFO] [stdout] 108 | |         selectors: vec![],
[INFO] [stdout] 109 | |         declarations: vec![],
[INFO] [stdout] 110 | |     })
[INFO] [stdout]     | |______^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/css.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 118 |     todo!("you need to implement this");
[INFO] [stdout]     |     ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 119 |     (char(' '),).map(|_| vec![])
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/css.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 127 |     todo!("you need to implement this");
[INFO] [stdout]     |     ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 128 |     (char(' '),).map(|_| SimpleSelector::UniversalSelector)
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/css.rs:137:5
[INFO] [stdout]     |
[INFO] [stdout] 136 |     todo!("you need to implement this");
[INFO] [stdout]     |     ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 137 |     (char(' '),).map(|_| vec![])
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/css.rs:146:5
[INFO] [stdout]     |
[INFO] [stdout] 145 |       todo!("you need to implement this");
[INFO] [stdout]     |       ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 146 | /     (char(' '),).map(|_| Declaration {
[INFO] [stdout] 147 | |         name: "".into(),
[INFO] [stdout] 148 | |         value: CSSValue::Keyword("".into()),
[INFO] [stdout] 149 | |     })
[INFO] [stdout]     | |______^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/css.rs:158:5
[INFO] [stdout]     |
[INFO] [stdout] 157 |     todo!("you need to implement this");
[INFO] [stdout]     |     ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 158 |     (char(' '),).map(|_| CSSValue::Keyword("".into()))
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/css.rs:98:5
[INFO] [stdout]    |
[INFO] [stdout] 97 |     todo!("you need to implement this");
[INFO] [stdout]    |     ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 98 |     (char(' ')).map(|_| vec![])
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/css.rs:107:5
[INFO] [stdout]     |
[INFO] [stdout] 106 |       todo!("you need to implement this");
[INFO] [stdout]     |       ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 107 | /     (char(' '),).map(|_| Rule {
[INFO] [stdout] 108 | |         selectors: vec![],
[INFO] [stdout] 109 | |         declarations: vec![],
[INFO] [stdout] 110 | |     })
[INFO] [stdout]     | |______^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/css.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 118 |     todo!("you need to implement this");
[INFO] [stdout]     |     ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 119 |     (char(' '),).map(|_| vec![])
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/css.rs:128:5
[INFO] [stdout]     |
[INFO] [stdout] 127 |     todo!("you need to implement this");
[INFO] [stdout]     |     ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 128 |     (char(' '),).map(|_| SimpleSelector::UniversalSelector)
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/css.rs:137:5
[INFO] [stdout]     |
[INFO] [stdout] 136 |     todo!("you need to implement this");
[INFO] [stdout]     |     ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 137 |     (char(' '),).map(|_| vec![])
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/css.rs:146:5
[INFO] [stdout]     |
[INFO] [stdout] 145 |       todo!("you need to implement this");
[INFO] [stdout]     |       ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 146 | /     (char(' '),).map(|_| Declaration {
[INFO] [stdout] 147 | |         name: "".into(),
[INFO] [stdout] 148 | |         value: CSSValue::Keyword("".into()),
[INFO] [stdout] 149 | |     })
[INFO] [stdout]     | |______^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `rule` is never used
[INFO] [stdout]    --> src/css.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn rule<Input>() -> impl Parser<Input, Output = Rule>
[INFO] [stdout]     |    ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `selectors` is never used
[INFO] [stdout]    --> src/css.rs:113:4
[INFO] [stdout]     |
[INFO] [stdout] 113 | fn selectors<Input>() -> impl Parser<Input, Output = Vec<Selector>>
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `simple_selector` is never used
[INFO] [stdout]    --> src/css.rs:122:4
[INFO] [stdout]     |
[INFO] [stdout] 122 | fn simple_selector<Input>() -> impl Parser<Input, Output = SimpleSelector>
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `declarations` is never used
[INFO] [stdout]    --> src/css.rs:131:4
[INFO] [stdout]     |
[INFO] [stdout] 131 | fn declarations<Input>() -> impl Parser<Input, Output = Vec<Declaration>>
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `declaration` is never used
[INFO] [stdout]    --> src/css.rs:140:4
[INFO] [stdout]     |
[INFO] [stdout] 140 | fn declaration<Input>() -> impl Parser<Input, Output = Declaration>
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `css_value` is never used
[INFO] [stdout]    --> src/css.rs:152:4
[INFO] [stdout]     |
[INFO] [stdout] 152 | fn css_value<Input>() -> impl Parser<Input, Output = CSSValue>
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/css.rs:158:5
[INFO] [stdout]     |
[INFO] [stdout] 157 |     todo!("you need to implement this");
[INFO] [stdout]     |     ----------------------------------- any code following this expression is unreachable
[INFO] [stdout] 158 |     (char(' '),).map(|_| CSSValue::Keyword("".into()))
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `css_value` is never used
[INFO] [stdout]    --> src/css.rs:152:4
[INFO] [stdout]     |
[INFO] [stdout] 152 | fn css_value<Input>() -> impl Parser<Input, Output = CSSValue>
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.07s
[INFO] running `Command { std: "docker" "inspect" "af7e11aca70f48e0d32313ab8e7c3d29d1364b88af5de0bdc3b708ef7a5c938e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af7e11aca70f48e0d32313ab8e7c3d29d1364b88af5de0bdc3b708ef7a5c938e", kill_on_drop: false }`
[INFO] [stdout] af7e11aca70f48e0d32313ab8e7c3d29d1364b88af5de0bdc3b708ef7a5c938e