[INFO] cloning repository https://github.com/swizzard/boggler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/swizzard/boggler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswizzard%2Fboggler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswizzard%2Fboggler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cc01442ec61024df5448d8460f06d2fcdd7e2531
[INFO] checking swizzard/boggler against try#0bdee9e879c87b7211d316e9152109cfd46c576b for pr-150097
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswizzard%2Fboggler" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/swizzard/boggler
[INFO] finished tweaking git repo https://github.com/swizzard/boggler
[INFO] tweaked toml for git repo https://github.com/swizzard/boggler written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/swizzard/boggler on toolchain 0bdee9e879c87b7211d316e9152109cfd46c576b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/swizzard/boggler 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" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking swizzard/boggler against try#0bdee9e879c87b7211d316e9152109cfd46c576b for pr-150097
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswizzard%2Fboggler" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/swizzard/boggler
[INFO] finished tweaking git repo https://github.com/swizzard/boggler
[INFO] tweaked toml for git repo https://github.com/swizzard/boggler written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/swizzard/boggler on toolchain 0bdee9e879c87b7211d316e9152109cfd46c576b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/swizzard/boggler 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" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ascii v0.8.7
[INFO] [stderr]   Downloaded rand_core v0.2.1
[INFO] [stderr]   Downloaded rand v0.5.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cff15a39bcefe9c55cf3949d80e71fd5da0b539e75f4b23f869a52cb29932e71
[INFO] running `Command { std: "docker" "start" "-a" "cff15a39bcefe9c55cf3949d80e71fd5da0b539e75f4b23f869a52cb29932e71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cff15a39bcefe9c55cf3949d80e71fd5da0b539e75f4b23f869a52cb29932e71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cff15a39bcefe9c55cf3949d80e71fd5da0b539e75f4b23f869a52cb29932e71", kill_on_drop: false }`
[INFO] [stdout] cff15a39bcefe9c55cf3949d80e71fd5da0b539e75f4b23f869a52cb29932e71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4593ca413bec56d0a25b26d4ca169630b3eff12200af578d80ee88818499a27
[INFO] running `Command { std: "docker" "start" "-a" "b4593ca413bec56d0a25b26d4ca169630b3eff12200af578d80ee88818499a27", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Checking libc v0.2.42
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]     Checking ascii v0.8.7
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking atty v0.2.10
[INFO] [stderr]     Checking rand v0.5.1
[INFO] [stderr]     Checking clap v2.31.2
[INFO] [stderr]     Checking boggler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0170]: pattern binding `q` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]   --> src/solver.rs:98:13
[INFO] [stdout]    |
[INFO] [stdout] 98 |         let q = &AsciiChar::from('q').unwrap();
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(bindings_with_variant_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `u` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]   --> src/solver.rs:99:13
[INFO] [stdout]    |
[INFO] [stdout] 99 |         let u = &AsciiChar::from('u').unwrap();
[INFO] [stdout]    |             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `c` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |         for c in word.chars() {
[INFO] [stdout]     |             ^ help: to match on the variant, qualify the path: `solver::ascii::AsciiChar::c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `c` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:143:26
[INFO] [stdout]     |
[INFO] [stdout] 143 |                     Some(c) => self.children.get(c).and_then(|ref child| child.find(&mut chrs, &ascii_word)),
[INFO] [stdout]     |                          ^ help: to match on the variant, qualify the path: `solver::ascii::AsciiChar::c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/solver.rs:154:13
[INFO] [stdout]     |
[INFO] [stdout] 154 |         let mut x = 0;
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/solver.rs:155:13
[INFO] [stdout]     |
[INFO] [stdout] 155 |         let mut y = 0;
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/solver.rs:156:13
[INFO] [stdout]     |
[INFO] [stdout] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `seen`
[INFO] [stdout]    --> src/solver.rs:156:13
[INFO] [stdout]     |
[INFO] [stdout] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
[INFO] [stdout]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_seen`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `adjcts`
[INFO] [stdout]    --> src/solver.rs:158:17
[INFO] [stdout]     |
[INFO] [stdout] 158 |             let adjcts = board.adjacents(x, y);
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_adjcts`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `c` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:181:18
[INFO] [stdout]     |
[INFO] [stdout] 181 |             Some(c) => self.children.entry(*c).or_insert(BTNode::new()).insert(chrs, word),
[INFO] [stdout]     |                  ^ help: to match on the variant, qualify the path: `solver::ascii::AsciiChar::c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `c` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:199:18
[INFO] [stdout]     |
[INFO] [stdout] 199 |             Some(c) => self.children.get(c).and_then(|child| child.find(chrs, word))
[INFO] [stdout]     |                  ^ help: to match on the variant, qualify the path: `solver::ascii::AsciiChar::c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `find_letter` is never used
[INFO] [stdout]    --> src/solver.rs:149:8
[INFO] [stdout]     |
[INFO] [stdout]  50 | impl BogglerTrie {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 149 |     fn find_letter(&self, chr: &AsciiChar) -> Option<&BTNode> {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/solver.rs:59:21
[INFO] [stdout]    |
[INFO] [stdout] 59 |                     &bt.add_word(ascii_word);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 59 |                     let _ = &bt.add_word(ascii_word);
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/solver.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |             &bt.add_word(&w);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 71 |             let _ = &bt.add_word(&w);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0170`.
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `q` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]   --> src/solver.rs:98:13
[INFO] [stdout]    |
[INFO] [stdout] 98 |         let q = &AsciiChar::from('q').unwrap();
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(bindings_with_variant_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `u` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]   --> src/solver.rs:99:13
[INFO] [stdout]    |
[INFO] [stdout] 99 |         let u = &AsciiChar::from('u').unwrap();
[INFO] [stdout]    |             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `c` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |         for c in word.chars() {
[INFO] [stdout]     |             ^ help: to match on the variant, qualify the path: `solver::ascii::AsciiChar::c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `c` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:143:26
[INFO] [stdout]     |
[INFO] [stdout] 143 |                     Some(c) => self.children.get(c).and_then(|ref child| child.find(&mut chrs, &ascii_word)),
[INFO] [stdout]     |                          ^ help: to match on the variant, qualify the path: `solver::ascii::AsciiChar::c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/solver.rs:154:13
[INFO] [stdout]     |
[INFO] [stdout] 154 |         let mut x = 0;
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/solver.rs:155:13
[INFO] [stdout]     |
[INFO] [stdout] 155 |         let mut y = 0;
[INFO] [stdout]     |             ----^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/solver.rs:156:13
[INFO] [stdout]     |
[INFO] [stdout] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `seen`
[INFO] [stdout]    --> src/solver.rs:156:13
[INFO] [stdout]     |
[INFO] [stdout] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
[INFO] [stdout]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_seen`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `adjcts`
[INFO] [stdout]    --> src/solver.rs:158:17
[INFO] [stdout]     |
[INFO] [stdout] 158 |             let adjcts = board.adjacents(x, y);
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_adjcts`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `c` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:181:18
[INFO] [stdout]     |
[INFO] [stdout] 181 |             Some(c) => self.children.entry(*c).or_insert(BTNode::new()).insert(chrs, word),
[INFO] [stdout]     |                  ^ help: to match on the variant, qualify the path: `solver::ascii::AsciiChar::c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `c` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:199:18
[INFO] [stdout]     |
[INFO] [stdout] 199 |             Some(c) => self.children.get(c).and_then(|child| child.find(chrs, word))
[INFO] [stdout]     |                  ^ help: to match on the variant, qualify the path: `solver::ascii::AsciiChar::c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `h` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:220:13
[INFO] [stdout]     |
[INFO] [stdout] 220 |         let h = AsciiChar::from('h').unwrap();
[INFO] [stdout]     |             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `e` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:221:13
[INFO] [stdout]     |
[INFO] [stdout] 221 |         let e = AsciiChar::from('e').unwrap();
[INFO] [stdout]     |             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `r` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:222:13
[INFO] [stdout]     |
[INFO] [stdout] 222 |         let r = AsciiChar::from('r').unwrap();
[INFO] [stdout]     |             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `h` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:231:13
[INFO] [stdout]     |
[INFO] [stdout] 231 |         let h = AsciiChar::from('h').unwrap();
[INFO] [stdout]     |             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `e` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:232:13
[INFO] [stdout]     |
[INFO] [stdout] 232 |         let e = AsciiChar::from('e').unwrap();
[INFO] [stdout]     |             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `r` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:233:13
[INFO] [stdout]     |
[INFO] [stdout] 233 |         let r = AsciiChar::from('r').unwrap();
[INFO] [stdout]     |             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0170]: pattern binding `o` is named the same as one of the variants of the type `solver::ascii::AsciiChar`
[INFO] [stdout]    --> src/solver.rs:234:13
[INFO] [stdout]     |
[INFO] [stdout] 234 |         let o = AsciiChar::from('o').unwrap();
[INFO] [stdout]     |             ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/solver.rs:59:21
[INFO] [stdout]    |
[INFO] [stdout] 59 |                     &bt.add_word(ascii_word);
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 59 |                     let _ = &bt.add_word(ascii_word);
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `boggler` (lib) due to 6 previous errors; 8 warnings emitted
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/solver.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |             &bt.add_word(&w);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 71 |             let _ = &bt.add_word(&w);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0170`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `boggler` (lib test) due to 13 previous errors; 7 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "b4593ca413bec56d0a25b26d4ca169630b3eff12200af578d80ee88818499a27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4593ca413bec56d0a25b26d4ca169630b3eff12200af578d80ee88818499a27", kill_on_drop: false }`
[INFO] [stdout] b4593ca413bec56d0a25b26d4ca169630b3eff12200af578d80ee88818499a27
