[INFO] cloning repository https://github.com/mshassium/happy_birthday
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mshassium/happy_birthday" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmshassium%2Fhappy_birthday", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmshassium%2Fhappy_birthday'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f6ddb6df528308257725313544e6f3c2af077743
[INFO] linting mshassium/happy_birthday against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmshassium%2Fhappy_birthday" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mshassium/happy_birthday
[INFO] finished tweaking git repo https://github.com/mshassium/happy_birthday
[INFO] tweaked toml for git repo https://github.com/mshassium/happy_birthday written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mshassium/happy_birthday on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mshassium/happy_birthday 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" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded text_io v0.1.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 506b56608fdf4b72fd5fdd197b529de8caf32a5b46b25f1467360987162ecf82
[INFO] running `Command { std: "docker" "start" "-a" "506b56608fdf4b72fd5fdd197b529de8caf32a5b46b25f1467360987162ecf82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "506b56608fdf4b72fd5fdd197b529de8caf32a5b46b25f1467360987162ecf82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "506b56608fdf4b72fd5fdd197b529de8caf32a5b46b25f1467360987162ecf82", kill_on_drop: false }`
[INFO] [stdout] 506b56608fdf4b72fd5fdd197b529de8caf32a5b46b25f1467360987162ecf82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 653d1d625e597ed68b90fd8f6f342515172662227cb2dfaed47ab6612cf00ad5
[INFO] running `Command { std: "docker" "start" "-a" "653d1d625e597ed68b90fd8f6f342515172662227cb2dfaed47ab6612cf00ad5", kill_on_drop: false }`
[INFO] [stderr]     Checking text_io v0.1.8
[INFO] [stderr]     Checking happy_birthday v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let _1 = String::from("в");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout]    = note: `#[warn(clippy::just_underscores_and_digits)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let _2 = String::from("е");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let _3 = String::from("н");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let _4 = String::from("т");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let _5 = String::from("и");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let _6 = String::from("л");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let _7 = String::from("я");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let _8 = String::from("ц");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let _1 = String::from("в");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout]    = note: `#[warn(clippy::just_underscores_and_digits)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let _2 = String::from("е");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let _3 = String::from("н");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let _4 = String::from("т");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let _5 = String::from("и");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let _6 = String::from("л");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let _7 = String::from("я");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: consider choosing a more descriptive name
[INFO] [stdout]   --> src/main.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let _8 = String::from("ц");
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#just_underscores_and_digits
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `answer`
[INFO] [stdout]    --> src/main.rs:367:9
[INFO] [stdout]     |
[INFO] [stdout] 367 |     let answer: String = read!();
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_answer`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/main.rs:147:12
[INFO] [stdout]     |
[INFO] [stdout] 147 |         if !next_char_number.parse::<f64>().is_ok() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `next_char_number.parse::<f64>().is_err()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `answer`
[INFO] [stdout]    --> src/main.rs:367:9
[INFO] [stdout]     |
[INFO] [stdout] 367 |     let answer: String = read!();
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_answer`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/main.rs:147:12
[INFO] [stdout]     |
[INFO] [stdout] 147 |         if !next_char_number.parse::<f64>().is_ok() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `next_char_number.parse::<f64>().is_err()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/main.rs:547:5
[INFO] [stdout]     |
[INFO] [stdout] 547 |     return false;
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]     = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 547 -     return false;
[INFO] [stdout] 547 +     false
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/main.rs:547:5
[INFO] [stdout]     |
[INFO] [stdout] 547 |     return false;
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]     = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 547 -     return false;
[INFO] [stdout] 547 +     false
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "653d1d625e597ed68b90fd8f6f342515172662227cb2dfaed47ab6612cf00ad5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "653d1d625e597ed68b90fd8f6f342515172662227cb2dfaed47ab6612cf00ad5", kill_on_drop: false }`
[INFO] [stdout] 653d1d625e597ed68b90fd8f6f342515172662227cb2dfaed47ab6612cf00ad5