[INFO] cloning repository https://github.com/dajinchu/boggle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dajinchu/boggle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdajinchu%2Fboggle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdajinchu%2Fboggle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d74f689c074b6440704c1958596777ba9ad7ac6c
[INFO] checking dajinchu/boggle against master#bb89df6903539e7014b8db29bccd6a9ee9553122 for pr-121072
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdajinchu%2Fboggle" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dajinchu/boggle on toolchain bb89df6903539e7014b8db29bccd6a9ee9553122
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bb89df6903539e7014b8db29bccd6a9ee9553122" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dajinchu/boggle
[INFO] finished tweaking git repo https://github.com/dajinchu/boggle
[INFO] tweaked toml for git repo https://github.com/dajinchu/boggle written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/dajinchu/boggle 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" "+bb89df6903539e7014b8db29bccd6a9ee9553122" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking dajinchu/boggle against try#e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0 for pr-121072
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdajinchu%2Fboggle" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dajinchu/boggle on toolchain e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dajinchu/boggle
[INFO] finished tweaking git repo https://github.com/dajinchu/boggle
[INFO] tweaked toml for git repo https://github.com/dajinchu/boggle written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/dajinchu/boggle 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" "+e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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 yada v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b13a23585021d3cf4e45e7c593392c166f52f38b159dccc6e373438b7344efe0
[INFO] running `Command { std: "docker" "start" "-a" "b13a23585021d3cf4e45e7c593392c166f52f38b159dccc6e373438b7344efe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b13a23585021d3cf4e45e7c593392c166f52f38b159dccc6e373438b7344efe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b13a23585021d3cf4e45e7c593392c166f52f38b159dccc6e373438b7344efe0", kill_on_drop: false }`
[INFO] [stdout] b13a23585021d3cf4e45e7c593392c166f52f38b159dccc6e373438b7344efe0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+e2d5da3bc6e298ce5f33ab9bd4e47f6a307ec8d0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fce9e45922f2021c56110459f7a06911586e9ccd0e6d09047a13ab8e33979209
[INFO] running `Command { std: "docker" "start" "-a" "fce9e45922f2021c56110459f7a06911586e9ccd0e6d09047a13ab8e33979209", kill_on_drop: false }`
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking endian-type v0.1.2
[INFO] [stderr]     Checking typed-arena v2.0.1
[INFO] [stderr]     Checking yada v0.5.0
[INFO] [stderr]     Checking nibble_vec v0.1.0
[INFO] [stderr]     Checking radix_trie v0.2.1
[INFO] [stderr]     Checking boggle v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::Trie`
[INFO] [stdout]  --> src/word_dict/radix_lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use super::Trie;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Debug`
[INFO] [stdout]  --> src/word_dict/yada.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Debug;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Trie`
[INFO] [stdout]  --> src/word_dict/yada.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use super::Trie;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::word_dict::Trie`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::word_dict::Trie;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::word_dict::hashmap::TrieHashMap`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::word_dict::hashmap::TrieHashMap;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::word_dict::linkedlist::TrieLinkedList`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use crate::word_dict::linkedlist::TrieLinkedList;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `linkedlist::TrieLinkedList`
[INFO] [stdout]    --> src/solver.rs:107:28
[INFO] [stdout]     |
[INFO] [stdout] 107 |     use crate::word_dict::{linkedlist::TrieLinkedList, linkedlist_typedarena::TrieLinkedListArena};
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Trie`
[INFO] [stdout]  --> src/word_dict/radix_lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use super::Trie;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Debug`
[INFO] [stdout]  --> src/word_dict/yada.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Debug;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Trie`
[INFO] [stdout]  --> src/word_dict/yada.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use super::Trie;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::word_dict::Trie`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::word_dict::Trie;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::word_dict::hashmap::TrieHashMap`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::word_dict::hashmap::TrieHashMap;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::word_dict::linkedlist::TrieLinkedList`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use crate::word_dict::linkedlist::TrieLinkedList;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `debug`
[INFO] [stdout]   --> src/word_dict/linkedlist.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |         let debug = word.starts_with("spoon");
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_debug`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/word_dict/linkedlist.rs:58:25
[INFO] [stdout]    |
[INFO] [stdout] 58 |         while let Some((i, c)) = chars.next() {
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/word_dict/radix_lib.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn blank(c: char) -> TrieRadix {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `blank`, `from_file`, and `add_word` are never used
[INFO] [stdout]   --> src/word_dict/hashmap.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl TrieHashMap {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 14 |     pub fn blank() -> TrieHashMap {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn from_file(filename: &str) -> Result<TrieHashMap, Error> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     fn add_word(&mut self, word: &str) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `blank`, `from_file`, and `add_word` are never used
[INFO] [stdout]   --> src/word_dict/linkedlist.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl TrieLinkedList {
[INFO] [stdout]    | ------------------- associated items in this implementation
[INFO] [stdout] 35 |     pub fn blank<'a>(c: char) -> TrieLinkedList {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     pub fn from_file(filename: &str) -> Result<TrieLinkedList, Error> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     fn add_word(&mut self, word: &str) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `blank`, `from_file`, and `add_word` are never used
[INFO] [stdout]   --> src/word_dict/vec.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl TrieVec {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 16 |     pub fn blank() -> TrieVec {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn from_file(filename: &str) -> Result<TrieVec, Error> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn add_word(&mut self, word: &str) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TrieNaive` is never constructed
[INFO] [stdout]  --> src/word_dict/naive.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct TrieNaive {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `TrieNaive` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `blank`, `from_file`, `add_word`, `is_word`, and `is_prefix` are never used
[INFO] [stdout]   --> src/word_dict/naive.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl TrieNaive {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 12 |     pub fn blank() -> TrieNaive {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn from_file(filename: &str) -> Result<TrieNaive, Error> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn add_word(&mut self, word: &str) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn is_word(&self, word: &str) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn is_prefix(&self, word: &str) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TrieRadix` is never constructed
[INFO] [stdout]  --> src/word_dict/radix_lib.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct TrieRadix {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `TrieRadix` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `blank`, `from_file`, and `add_word` are never used
[INFO] [stdout]   --> src/word_dict/radix_lib.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl TrieRadix {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 13 |     pub fn blank(c: char) -> TrieRadix {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn from_file(filename: &str) -> Result<TrieRadix, Error> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |     fn add_word(&mut self, word: &str) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TrieYada` is never constructed
[INFO] [stdout]   --> src/word_dict/yada.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct TrieYada {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `from_file` and `from_words` are never used
[INFO] [stdout]   --> src/word_dict/yada.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl TrieYada {
[INFO] [stdout]    | ------------- associated functions in this implementation
[INFO] [stdout] 15 |     pub fn from_file(filename: &str) -> Result<TrieYada, Error> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     fn from_words(words: Vec<String>) -> TrieYada {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `debug`
[INFO] [stdout]   --> src/word_dict/linkedlist.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |         let debug = word.starts_with("spoon");
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_debug`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/word_dict/linkedlist.rs:58:25
[INFO] [stdout]    |
[INFO] [stdout] 58 |         while let Some((i, c)) = chars.next() {
[INFO] [stdout]    |                         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]    --> src/word_dict/linkedlist.rs:161:17
[INFO] [stdout]     |
[INFO] [stdout] 161 |         let mut count = 0;
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/word_dict/linkedlist.rs:161:13
[INFO] [stdout]     |
[INFO] [stdout] 161 |         let mut count = 0;
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/word_dict/linkedlist_typedarena.rs:157:13
[INFO] [stdout]     |
[INFO] [stdout] 157 |         let mut dict = TrieLinkedListArena::blank(' ');
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/word_dict/radix_lib.rs:13:18
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn blank(c: char) -> TrieRadix {
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/word_dict/radix_lib.rs:88:17
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let mut count = 0;
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/word_dict/radix_lib.rs:88:13
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let mut count = 0;
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dict`
[INFO] [stdout]   --> src/word_dict/yada.rs:63:17
[INFO] [stdout]    |
[INFO] [stdout] 63 |         let mut dict = TrieYada::from_words(
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_dict`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/word_dict/yada.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |         let mut dict = TrieYada::from_words(
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/word_dict/yada.rs:93:17
[INFO] [stdout]    |
[INFO] [stdout] 93 |         let mut count = 0;
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/word_dict/yada.rs:93:13
[INFO] [stdout]    |
[INFO] [stdout] 93 |         let mut count = 0;
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TrieNaive` is never constructed
[INFO] [stdout]  --> src/word_dict/naive.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct TrieNaive {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `TrieNaive` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `blank`, `from_file`, `add_word`, `is_word`, and `is_prefix` are never used
[INFO] [stdout]   --> src/word_dict/naive.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl TrieNaive {
[INFO] [stdout]    | -------------- associated items in this implementation
[INFO] [stdout] 12 |     pub fn blank() -> TrieNaive {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     pub fn from_file(filename: &str) -> Result<TrieNaive, Error> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     fn add_word(&mut self, word: &str) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn is_word(&self, word: &str) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn is_prefix(&self, word: &str) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `trie` is never read
[INFO] [stdout]   --> src/word_dict/yada.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct TrieYada {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 11 |     trie: yada::DoubleArray<Vec<u8>>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 22 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "fce9e45922f2021c56110459f7a06911586e9ccd0e6d09047a13ab8e33979209", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fce9e45922f2021c56110459f7a06911586e9ccd0e6d09047a13ab8e33979209", kill_on_drop: false }`
[INFO] [stdout] fce9e45922f2021c56110459f7a06911586e9ccd0e6d09047a13ab8e33979209