[INFO] cloning repository https://github.com/Osspial/letter-pair
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Osspial/letter-pair" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOsspial%2Fletter-pair", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOsspial%2Fletter-pair'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e6317b4cab7c9b1252584958d8e6346777837657
[INFO] linting Osspial/letter-pair against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOsspial%2Fletter-pair" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Osspial/letter-pair
[INFO] finished tweaking git repo https://github.com/Osspial/letter-pair
[INFO] tweaked toml for git repo https://github.com/Osspial/letter-pair written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Osspial/letter-pair 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/Osspial/letter-pair 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] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 0a663b31823c286f264f258a0b521238ca5334ddcfb96b96497728610f2b5440
[INFO] running `Command { std: "docker" "start" "-a" "0a663b31823c286f264f258a0b521238ca5334ddcfb96b96497728610f2b5440", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a663b31823c286f264f258a0b521238ca5334ddcfb96b96497728610f2b5440", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a663b31823c286f264f258a0b521238ca5334ddcfb96b96497728610f2b5440", kill_on_drop: false }`
[INFO] [stdout] 0a663b31823c286f264f258a0b521238ca5334ddcfb96b96497728610f2b5440
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 62021045527fd0aaaf5de6096cd08b16239a60212df61803ed0b5eda515a7233
[INFO] running `Command { std: "docker" "start" "-a" "62021045527fd0aaaf5de6096cd08b16239a60212df61803ed0b5eda515a7233", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]     Checking letter-pair v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `nll` has been stable since 1.63.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(nll)]
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `nll` has been stable since 1.63.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(nll)]
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wheel_max_len`
[INFO] [stdout]   --> src/main.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let wheel_max_len = 8;
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_wheel_max_len`
[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:33:26
[INFO] [stdout]    |
[INFO] [stdout] 33 |             if c != h && !letter_pairs.get(&(c, h)).is_some() {
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `letter_pairs.get(&(c, h)).is_none()`
[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: casting a character literal to `u8` truncates
[INFO] [stdout]   --> src/main.rs:30:14
[INFO] [stdout]    |
[INFO] [stdout] 30 |     for c in 'a' as u8..='z' as u8 {
[INFO] [stdout]    |              ^^^^^^^^^ help: use a byte literal instead: `b'a'`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `char` is four bytes wide, but `u8` is a single byte
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stdout]    = note: `#[warn(clippy::char_lit_as_u8)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting a character literal to `u8` truncates
[INFO] [stdout]   --> src/main.rs:30:26
[INFO] [stdout]    |
[INFO] [stdout] 30 |     for c in 'a' as u8..='z' as u8 {
[INFO] [stdout]    |                          ^^^^^^^^^ help: use a byte literal instead: `b'z'`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `char` is four bytes wide, but `u8` is a single byte
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting a character literal to `u8` truncates
[INFO] [stdout]   --> src/main.rs:31:18
[INFO] [stdout]    |
[INFO] [stdout] 31 |         for h in 'a' as u8..='z' as u8 {
[INFO] [stdout]    |                  ^^^^^^^^^ help: use a byte literal instead: `b'a'`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `char` is four bytes wide, but `u8` is a single byte
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting a character literal to `u8` truncates
[INFO] [stdout]   --> src/main.rs:31:30
[INFO] [stdout]    |
[INFO] [stdout] 31 |         for h in 'a' as u8..='z' as u8 {
[INFO] [stdout]    |                              ^^^^^^^^^ help: use a byte literal instead: `b'z'`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `char` is four bytes wide, but `u8` is a single byte
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary use of `get(&(c, h)).is_some()`
[INFO] [stdout]   --> src/main.rs:33:40
[INFO] [stdout]    |
[INFO] [stdout] 33 |             if c != h && !letter_pairs.get(&(c, h)).is_some() {
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `contains_key(&(c, h))`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_get_then_check
[INFO] [stdout]    = note: `#[warn(clippy::unnecessary_get_then_check)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting a character literal to `u8` truncates
[INFO] [stdout]   --> src/main.rs:70:15
[INFO] [stdout]    |
[INFO] [stdout] 70 |     for c in ('a' as u8..='z' as u8).map(|c| c as char) {
[INFO] [stdout]    |               ^^^^^^^^^ help: use a byte literal instead: `b'a'`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `char` is four bytes wide, but `u8` is a single byte
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting a character literal to `u8` truncates
[INFO] [stdout]   --> src/main.rs:70:27
[INFO] [stdout]    |
[INFO] [stdout] 70 |     for c in ('a' as u8..='z' as u8).map(|c| c as char) {
[INFO] [stdout]    |                           ^^^^^^^^^ help: use a byte literal instead: `b'z'`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `char` is four bytes wide, but `u8` is a single byte
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/main.rs:77:11
[INFO] [stdout]    |
[INFO] [stdout] 77 |     while unused_characters.len() > 0 {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!unused_characters.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout]    = note: `#[warn(clippy::len_zero)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/main.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 88 |         if wheel.len() == 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `wheel.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wheel_max_len`
[INFO] [stdout]   --> src/main.rs:74:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |     let wheel_max_len = 8;
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_wheel_max_len`
[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:33:26
[INFO] [stdout]    |
[INFO] [stdout] 33 |             if c != h && !letter_pairs.get(&(c, h)).is_some() {
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `letter_pairs.get(&(c, h)).is_none()`
[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: casting a character literal to `u8` truncates
[INFO] [stdout]   --> src/main.rs:30:14
[INFO] [stdout]    |
[INFO] [stdout] 30 |     for c in 'a' as u8..='z' as u8 {
[INFO] [stdout]    |              ^^^^^^^^^ help: use a byte literal instead: `b'a'`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `char` is four bytes wide, but `u8` is a single byte
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stdout]    = note: `#[warn(clippy::char_lit_as_u8)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting a character literal to `u8` truncates
[INFO] [stdout]   --> src/main.rs:30:26
[INFO] [stdout]    |
[INFO] [stdout] 30 |     for c in 'a' as u8..='z' as u8 {
[INFO] [stdout]    |                          ^^^^^^^^^ help: use a byte literal instead: `b'z'`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `char` is four bytes wide, but `u8` is a single byte
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting a character literal to `u8` truncates
[INFO] [stdout]   --> src/main.rs:31:18
[INFO] [stdout]    |
[INFO] [stdout] 31 |         for h in 'a' as u8..='z' as u8 {
[INFO] [stdout]    |                  ^^^^^^^^^ help: use a byte literal instead: `b'a'`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `char` is four bytes wide, but `u8` is a single byte
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting a character literal to `u8` truncates
[INFO] [stdout]   --> src/main.rs:31:30
[INFO] [stdout]    |
[INFO] [stdout] 31 |         for h in 'a' as u8..='z' as u8 {
[INFO] [stdout]    |                              ^^^^^^^^^ help: use a byte literal instead: `b'z'`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `char` is four bytes wide, but `u8` is a single byte
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary use of `get(&(c, h)).is_some()`
[INFO] [stdout]   --> src/main.rs:33:40
[INFO] [stdout]    |
[INFO] [stdout] 33 |             if c != h && !letter_pairs.get(&(c, h)).is_some() {
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `contains_key(&(c, h))`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_get_then_check
[INFO] [stdout]    = note: `#[warn(clippy::unnecessary_get_then_check)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting a character literal to `u8` truncates
[INFO] [stdout]   --> src/main.rs:70:15
[INFO] [stdout]    |
[INFO] [stdout] 70 |     for c in ('a' as u8..='z' as u8).map(|c| c as char) {
[INFO] [stdout]    |               ^^^^^^^^^ help: use a byte literal instead: `b'a'`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `char` is four bytes wide, but `u8` is a single byte
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting a character literal to `u8` truncates
[INFO] [stdout]   --> src/main.rs:70:27
[INFO] [stdout]    |
[INFO] [stdout] 70 |     for c in ('a' as u8..='z' as u8).map(|c| c as char) {
[INFO] [stdout]    |                           ^^^^^^^^^ help: use a byte literal instead: `b'z'`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `char` is four bytes wide, but `u8` is a single byte
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#char_lit_as_u8
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/main.rs:77:11
[INFO] [stdout]    |
[INFO] [stdout] 77 |     while unused_characters.len() > 0 {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!unused_characters.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout]    = note: `#[warn(clippy::len_zero)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/main.rs:88:12
[INFO] [stdout]    |
[INFO] [stdout] 88 |         if wheel.len() == 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `wheel.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "62021045527fd0aaaf5de6096cd08b16239a60212df61803ed0b5eda515a7233", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62021045527fd0aaaf5de6096cd08b16239a60212df61803ed0b5eda515a7233", kill_on_drop: false }`
[INFO] [stdout] 62021045527fd0aaaf5de6096cd08b16239a60212df61803ed0b5eda515a7233