[INFO] cloning repository https://github.com/shubhraagarwal/rust-practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shubhraagarwal/rust-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshubhraagarwal%2Frust-practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshubhraagarwal%2Frust-practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 67409a44785be90901dcaf823287d4cfdaebcdbc
[INFO] testing shubhraagarwal/rust-practice against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshubhraagarwal%2Frust-practice" "/workspace/builds/worker-28/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-28/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shubhraagarwal/rust-practice on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shubhraagarwal/rust-practice
[INFO] finished tweaking git repo https://github.com/shubhraagarwal/rust-practice
[INFO] tweaked toml for git repo https://github.com/shubhraagarwal/rust-practice written to /workspace/builds/worker-28/source/Cargo.toml
[INFO] crate git repo https://github.com/shubhraagarwal/rust-practice already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae05756cacb5186679b6df52cc60d4c6311e8c0f93a8dac596020a39fb1fae08
[INFO] running `Command { std: "docker" "start" "-a" "ae05756cacb5186679b6df52cc60d4c6311e8c0f93a8dac596020a39fb1fae08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae05756cacb5186679b6df52cc60d4c6311e8c0f93a8dac596020a39fb1fae08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae05756cacb5186679b6df52cc60d4c6311e8c0f93a8dac596020a39fb1fae08", kill_on_drop: false }`
[INFO] [stdout] ae05756cacb5186679b6df52cc60d4c6311e8c0f93a8dac596020a39fb1fae08
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-28/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 901c6a2b0bd41d4a711237933b1d6c4d733aa31739805a77233a2e3e521b09c4
[INFO] running `Command { std: "docker" "start" "-a" "901c6a2b0bd41d4a711237933b1d6c4d733aa31739805a77233a2e3e521b09c4", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0753]: expected outer doc comment
[INFO] [stdout]  --> src/variables.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     //! variables2.rs
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: inner doc comments like this (starting with `//!` or `/*!`) can only appear before items
[INFO] [stdout] help: you might have meant to write a regular comment
[INFO] [stdout]   |
[INFO] [stdout] 7 -     //! variables2.rs
[INFO] [stdout] 7 +     // variables2.rs
[INFO] [stdout]   | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0753]: expected outer doc comment
[INFO] [stdout]   --> src/variables.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     //! variables3.rs
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: inner doc comments like this (starting with `//!` or `/*!`) can only appear before items
[INFO] [stdout] help: you might have meant to write a regular comment
[INFO] [stdout]    |
[INFO] [stdout] 14 -     //! variables3.rs
[INFO] [stdout] 14 +     // variables3.rs
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0753]: expected outer doc comment
[INFO] [stdout]   --> src/variables.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     //! variables5.rs
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: inner doc comments like this (starting with `//!` or `/*!`) can only appear before items
[INFO] [stdout] help: you might have meant to write a regular comment
[INFO] [stdout]    |
[INFO] [stdout] 22 -     //! variables5.rs
[INFO] [stdout] 22 +     // variables5.rs
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0753]: expected outer doc comment
[INFO] [stdout]   --> src/variables.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     //! variables6.rs
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 29 |     println!("Number {}", NUMBER);
[INFO] [stdout]    |     ------------------------------ the inner doc comment doesn't annotate this item macro invocation
[INFO] [stdout]    |
[INFO] [stdout] help: to annotate the item macro invocation, change the doc comment from inner to outer style
[INFO] [stdout]    |
[INFO] [stdout] 28 |     /// variables6.rs
[INFO] [stdout]    |       ~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/variables.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     //! variables6.rs
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]  --> src/variables.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     //! variables2.rs
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 8 |     let x : u8 = 10;
[INFO] [stdout]   |     ---------------- rustdoc does not generate documentation for statements
[INFO] [stdout]   |
[INFO] [stdout]   = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/variables.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     //! variables3.rs
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 15 |     let mut x = 3;
[INFO] [stdout]    |     -------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/variables.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     //! variables5.rs
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 23 |     let number = "T-H-R-E-E"; // don't change this line
[INFO] [stdout]    |     ------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0753`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello-rust` due to 5 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "901c6a2b0bd41d4a711237933b1d6c4d733aa31739805a77233a2e3e521b09c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "901c6a2b0bd41d4a711237933b1d6c4d733aa31739805a77233a2e3e521b09c4", kill_on_drop: false }`
[INFO] [stdout] 901c6a2b0bd41d4a711237933b1d6c4d733aa31739805a77233a2e3e521b09c4