[INFO] cloning repository https://github.com/VengeQ/Aho_compliers_exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VengeQ/Aho_compliers_exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVengeQ%2FAho_compliers_exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVengeQ%2FAho_compliers_exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2ade23bb0f3fdc1d61c5155f218277987741d3cb
[INFO] checking VengeQ/Aho_compliers_exercises/2ade23bb0f3fdc1d61c5155f218277987741d3cb against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVengeQ%2FAho_compliers_exercises" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/VengeQ/Aho_compliers_exercises on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/VengeQ/Aho_compliers_exercises
[INFO] finished tweaking git repo https://github.com/VengeQ/Aho_compliers_exercises
[INFO] tweaked toml for git repo https://github.com/VengeQ/Aho_compliers_exercises written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/VengeQ/Aho_compliers_exercises 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b50614c32abadb9eb9e84501af2d9f14f0b30e4a69953607cf86da85ee849c6a
[INFO] running `Command { std: "docker" "start" "-a" "b50614c32abadb9eb9e84501af2d9f14f0b30e4a69953607cf86da85ee849c6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b50614c32abadb9eb9e84501af2d9f14f0b30e4a69953607cf86da85ee849c6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b50614c32abadb9eb9e84501af2d9f14f0b30e4a69953607cf86da85ee849c6a", kill_on_drop: false }`
[INFO] [stdout] b50614c32abadb9eb9e84501af2d9f14f0b30e4a69953607cf86da85ee849c6a
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2db4389b3708f6a807c1090d908c940d4ed3fbf9e7c87f731cc1afe05bb1b2c7
[INFO] running `Command { std: "docker" "start" "-a" "2db4389b3708f6a807c1090d908c940d4ed3fbf9e7c87f731cc1afe05bb1b2c7", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking regex-syntax v0.6.11
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking regex v1.2.1
[INFO] [stderr]     Checking aho_compilers v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::ops::Deref`
[INFO] [stdout]  --> src/part2/lexer.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::ops::Deref;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/part2/lexer.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |         (self.num.to_string())
[INFO] [stdout]    |         ^                    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 69 -         (self.num.to_string())
[INFO] [stdout] 69 +         self.num.to_string()
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::DerefMut`
[INFO] [stdout]  --> src/part2/symbols_table.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::DerefMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::Chars`
[INFO] [stdout]  --> src/part3/extended_lexer.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::str::Chars;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::min`
[INFO] [stdout]  --> src/part3/extended_lexer.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cmp::min;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/part2/lexer.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |         (self.num.to_string())
[INFO] [stdout]    |         ^                    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 69 -         (self.num.to_string())
[INFO] [stdout] 69 +         self.num.to_string()
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/part2/lexer.rs:344:13
[INFO] [stdout]     |
[INFO] [stdout] 344 |             ;
[INFO] [stdout]     |             ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::DerefMut`
[INFO] [stdout]  --> src/part2/symbols_table.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops::DerefMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::Chars`
[INFO] [stdout]  --> src/part3/extended_lexer.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::str::Chars;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::min`
[INFO] [stdout]  --> src/part3/extended_lexer.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cmp::min;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]    --> src/part3/extended_lexer.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 |     use std::time::Duration;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]    --> src/part3/extended_lexer.rs:108:29
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn scan_test(&mut self, input: String) -> Token {
[INFO] [stdout]     |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/lib.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `lookahead` and `string` are never read
[INFO] [stdout]  --> src/part2/simple_translator.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct SimpleTranslator<'a> {
[INFO] [stdout]   |        ---------------- fields in this struct
[INFO] [stdout] 5 |     lookahead: char,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 6 |     string: Chars<'a>,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `from_string`, `expr`, `term`, and `matcher` are never used
[INFO] [stdout]   --> src/part2/simple_translator.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<'a> SimpleTranslator<'a> {
[INFO] [stdout]    | ----------------------------- associated items in this implementation
[INFO] [stdout] 11 |     pub fn from_string(input: &'a str) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn expr(&mut self) -> Result<String, String> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     fn term(&mut self) -> Result<char, String> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 67 |     fn matcher(&mut self, t: char) -> Result<(), String> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Tag` is never used
[INFO] [stdout]  --> src/part2/lexer.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | enum Tag {
[INFO] [stdout]   |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `tag` is never used
[INFO] [stdout]   --> src/part2/lexer.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | trait Token {
[INFO] [stdout]    |       ----- method in this trait
[INFO] [stdout] 24 |     fn tag(&self) -> &Tag;
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Word` is never constructed
[INFO] [stdout]   --> src/part2/lexer.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | struct Word {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/part2/lexer.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl Word {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 41 |     pub fn new(tag: Tag, word: String) -> Self { Word { tag, word } }
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Num` is never constructed
[INFO] [stdout]   --> src/part2/lexer.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | struct Num {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/part2/lexer.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 60 | impl Num {
[INFO] [stdout]    | -------- associated function in this implementation
[INFO] [stdout] 61 |     pub fn new(value: i32) -> Self { Num { tag: Tag::NUM, num: value } }
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Words` is never used
[INFO] [stdout]   --> src/part2/lexer.rs:74:6
[INFO] [stdout]    |
[INFO] [stdout] 74 | type Words = HashMap<String, Word>;
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Lines` is never used
[INFO] [stdout]   --> src/part2/lexer.rs:75:6
[INFO] [stdout]    |
[INFO] [stdout] 75 | type Lines = HashMap<usize, Box<Vec<Box<dyn Token>>>>;
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lexer` is never constructed
[INFO] [stdout]   --> src/part2/lexer.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 | struct Lexer {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `reserve`, `read_char_or_return_eof`, `return_ptr`, `full_scan`, and `scan` are never used
[INFO] [stdout]    --> src/part2/lexer.rs:89:12
[INFO] [stdout]     |
[INFO] [stdout] 88  | impl Lexer {
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout] 89  |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |     fn reserve(&mut self, word: Word) {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |     fn read_char_or_return_eof(&mut self, input: &mut Chars) -> char {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 118 |     fn return_ptr(&mut self, input: &mut Chars) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 123 |     pub fn full_scan(&mut self, input: &str) -> &Lines {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 133 |     pub fn scan(&mut self, input: &str) -> Box<dyn Token> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Env` is never constructed
[INFO] [stdout]  --> src/part2/symbols_table.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Env {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Env` has a derived impl for the trait `Default`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `insert`, and `get` are never used
[INFO] [stdout]   --> src/part2/symbols_table.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Env {
[INFO] [stdout]    | -------- associated items in this implementation
[INFO] [stdout] 13 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn insert(&mut self, key: &str, sym: String) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn get(&self, key: &str) -> Option<String> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `aho_corasick_failure` is never used
[INFO] [stdout]  --> src/part3.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn aho_corasick_failure(input: &str) -> String{
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Token` is never constructed
[INFO] [stdout]   --> src/part3/extended_lexer.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Token(String);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `token` and `from_str` are never used
[INFO] [stdout]   --> src/part3/extended_lexer.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Token {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 23 |     fn token(&self) -> String {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     fn from_str(s: &str) -> Self {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Buffer` is never used
[INFO] [stdout]   --> src/part3/extended_lexer.rs:32:6
[INFO] [stdout]    |
[INFO] [stdout] 32 | enum Buffer {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BUFFERSIZE` is never used
[INFO] [stdout]   --> src/part3/extended_lexer.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 | const BUFFERSIZE:usize=2048;
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Lexer` is never constructed
[INFO] [stdout]   --> src/part3/extended_lexer.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Lexer {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/part3/extended_lexer.rs:58:8
[INFO] [stdout]     |
[INFO] [stdout] 57  | impl<'a> Lexer {
[INFO] [stdout]     | -------------- associated items in this implementation
[INFO] [stdout] 58  |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 62  |     fn cur_buffer(&self) -> [char; BUFFERSIZE] {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 70  |     fn init_regex() -> HashMap<String, regex::Regex> {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 80  |     fn init_buffer(&mut self, input: String) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 99  |     fn change_buffer(&mut self, input: &str) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |     fn scan_test(&mut self, input: String) -> Token {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 112 |     fn is_eof(&mut self) -> bool {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 123 |     pub fn scan(&mut self, input: &str) -> Option<Token> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 174 |     fn clear(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 183 |     fn update_buffer() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused comparison that must be used
[INFO] [stdout]    --> src/part3/extended_lexer.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |                 self.buffer == Buffer::B;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^ the comparison produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 102 |                 let _ = self.buffer == Buffer::B;
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expected`
[INFO] [stdout]   --> src/part2/symbols_table.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |         let expected: Option<Env> = None;
[INFO] [stdout]    |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_expected`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]    --> src/part3/extended_lexer.rs:108:29
[INFO] [stdout]     |
[INFO] [stdout] 108 |     fn scan_test(&mut self, input: String) -> Token {
[INFO] [stdout]     |                             ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `tag` is never used
[INFO] [stdout]   --> src/part2/lexer.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | trait Token {
[INFO] [stdout]    |       ----- method in this trait
[INFO] [stdout] 24 |     fn tag(&self) -> &Tag;
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Lines` is never used
[INFO] [stdout]   --> src/part2/lexer.rs:75:6
[INFO] [stdout]    |
[INFO] [stdout] 75 | type Lines = HashMap<usize, Box<Vec<Box<dyn Token>>>>;
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `full_scan` is never used
[INFO] [stdout]    --> src/part2/lexer.rs:123:12
[INFO] [stdout]     |
[INFO] [stdout] 88  | impl Lexer {
[INFO] [stdout]     | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 123 |     pub fn full_scan(&mut self, input: &str) -> &Lines {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `update_buffer` is never used
[INFO] [stdout]    --> src/part3/extended_lexer.rs:183:8
[INFO] [stdout]     |
[INFO] [stdout] 57  | impl<'a> Lexer {
[INFO] [stdout]     | -------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 183 |     fn update_buffer() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused comparison that must be used
[INFO] [stdout]    --> src/part3/extended_lexer.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |                 self.buffer == Buffer::B;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^ the comparison produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 102 |                 let _ = self.buffer == Buffer::B;
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.96s
[INFO] running `Command { std: "docker" "inspect" "2db4389b3708f6a807c1090d908c940d4ed3fbf9e7c87f731cc1afe05bb1b2c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2db4389b3708f6a807c1090d908c940d4ed3fbf9e7c87f731cc1afe05bb1b2c7", kill_on_drop: false }`
[INFO] [stdout] 2db4389b3708f6a807c1090d908c940d4ed3fbf9e7c87f731cc1afe05bb1b2c7