[INFO] cloning repository https://github.com/baoziv587/LoxLang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/baoziv587/LoxLang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbaoziv587%2FLoxLang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbaoziv587%2FLoxLang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c5f72cf61fa1d6b4fc5cc4f69385090c8930202d
[INFO] checking baoziv587/LoxLang against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbaoziv587%2FLoxLang" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/baoziv587/LoxLang on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/baoziv587/LoxLang
[INFO] finished tweaking git repo https://github.com/baoziv587/LoxLang
[INFO] tweaked toml for git repo https://github.com/baoziv587/LoxLang written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/baoziv587/LoxLang already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pretty_env_logger v0.3.0
[INFO] [stderr]   Downloaded regex v1.1.7
[INFO] [stderr]   Downloaded regex-syntax v0.6.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2ba8536fb82ea3e5ec028563c392ea914a251ad6428e98b7a5e79714c461073c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2ba8536fb82ea3e5ec028563c392ea914a251ad6428e98b7a5e79714c461073c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ba8536fb82ea3e5ec028563c392ea914a251ad6428e98b7a5e79714c461073c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ba8536fb82ea3e5ec028563c392ea914a251ad6428e98b7a5e79714c461073c", kill_on_drop: false }`
[INFO] [stdout] 2ba8536fb82ea3e5ec028563c392ea914a251ad6428e98b7a5e79714c461073c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6c24a43d03825cb258e9df479bd69092095a169975a054d5c61c047829b1ff15
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6c24a43d03825cb258e9df479bd69092095a169975a054d5c61c047829b1ff15", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling regex v1.1.7
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking quick-error v1.2.2
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking utf8-ranges v1.0.3
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking humantime v1.2.0
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking regex-syntax v0.6.7
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking aho-corasick v0.7.3
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking env_logger v0.6.1
[INFO] [stderr]     Checking pretty_env_logger v0.3.0
[INFO] [stderr]     Checking lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `core`
[INFO] [stdout]  --> src/cli/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core;
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]    --> src/frontend/scanner.rs:260:5
[INFO] [stdout]     |
[INFO] [stdout] 260 | use std::fs::File;
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]    --> src/frontend/scanner.rs:261:5
[INFO] [stdout]     |
[INFO] [stdout] 261 | use std::io::Read;
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/result.rs:73:32
[INFO] [stdout]    |
[INFO] [stdout] 73 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/lib.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/result.rs:65:35
[INFO] [stdout]    |
[INFO] [stdout] 65 |             Error::IO(ref e) => e.description(),
[INFO] [stdout]    |                                   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/result.rs:75:35
[INFO] [stdout]    |
[INFO] [stdout] 75 |             Error::IO(ref e) => e.cause(),
[INFO] [stdout]    |                                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source`
[INFO] [stdout]   --> src/core/lox.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn run(source: &str) {}
[INFO] [stdout]    |            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/frontend/scanner.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |         let content = self.slice(start, end);
[INFO] [stdout]     |                       ---- immutable borrow occurs here
[INFO] [stdout] 143 |         self.create_token(
[INFO] [stdout]     |         ^^^^ mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 146 |             content.to_string(),
[INFO] [stdout]     |             ------- immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/frontend/scanner.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 177 |         let value = self.slice(self.start, self.current);
[INFO] [stdout]     |                     ---- immutable borrow occurs here
[INFO] [stdout] 178 |         self.create_token(
[INFO] [stdout]     |         ^^^^ mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 181 |             value.to_string(),
[INFO] [stdout]     |             ----- immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]   --> src/core/lox.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn run(source: &str) {}
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `expressions`
[INFO] [stdout]   --> src/frontend/parser.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn expressions(&mut self) -> Result<Expr> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `equality`
[INFO] [stdout]   --> src/frontend/parser.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn equality(&mut self) -> Result<Expr> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `match_type`
[INFO] [stdout]   --> src/frontend/parser.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn match_type(&mut self, types: &Vec<TokenType>) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `expect_next`
[INFO] [stdout]   --> src/frontend/parser.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn expect_next(&mut self, types: &Vec<TokenType>) -> Result<&Token> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_error`
[INFO] [stdout]   --> src/frontend/parser.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn peek_error(&mut self) -> Error {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `advance`
[INFO] [stdout]   --> src/frontend/parser.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn advance(&mut self) -> Option<&Token> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `previous`
[INFO] [stdout]   --> src/frontend/parser.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn previous(&self) -> Option<&Token> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `check`
[INFO] [stdout]   --> src/frontend/parser.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn check(&self, t: &TokenType) -> bool {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_at_end`
[INFO] [stdout]   --> src/frontend/parser.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 |     fn is_at_end(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek`
[INFO] [stdout]   --> src/frontend/parser.rs:90:8
[INFO] [stdout]    |
[INFO] [stdout] 90 |     fn peek(&self) -> Option<&Token> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `comparison`
[INFO] [stdout]   --> src/frontend/parser.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn comparison(&mut self) -> Result<Expr> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `addition`
[INFO] [stdout]    --> src/frontend/parser.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 113 |     fn addition(&mut self) -> Result<Expr> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mutilplication`
[INFO] [stdout]    --> src/frontend/parser.rs:126:8
[INFO] [stdout]     |
[INFO] [stdout] 126 |     fn mutilplication(&mut self) -> Result<Expr> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unray`
[INFO] [stdout]    --> src/frontend/parser.rs:132:8
[INFO] [stdout]     |
[INFO] [stdout] 132 |     fn unray(&mut self) -> Result<Expr> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `primary`
[INFO] [stdout]    --> src/frontend/parser.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 143 |     fn primary(&mut self) -> Result<Expr> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unexpected`
[INFO] [stdout]    --> src/frontend/parser.rs:163:8
[INFO] [stdout]     |
[INFO] [stdout] 163 |     fn unexpected(&mut self, t: &Token) -> Error {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `eof`
[INFO] [stdout]    --> src/frontend/parser.rs:172:8
[INFO] [stdout]     |
[INFO] [stdout] 172 |     fn eof(&self) -> Error {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `slice`
[INFO] [stdout]   --> src/frontend/scanner.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn slice(&self, start: usize, end: usize) -> &str {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_tokens`
[INFO] [stdout]   --> src/frontend/scanner.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn scan_tokens(&mut self) -> Vec<Token> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_at_end`
[INFO] [stdout]   --> src/frontend/scanner.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 |     fn is_at_end(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_token`
[INFO] [stdout]   --> src/frontend/scanner.rs:61:8
[INFO] [stdout]    |
[INFO] [stdout] 61 |     fn scan_token(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_string`
[INFO] [stdout]    --> src/frontend/scanner.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 |     fn scan_string(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_comment`
[INFO] [stdout]    --> src/frontend/scanner.rs:151:8
[INFO] [stdout]     |
[INFO] [stdout] 151 |     fn scan_comment(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_new_line`
[INFO] [stdout]    --> src/frontend/scanner.rs:158:8
[INFO] [stdout]     |
[INFO] [stdout] 158 |     fn scan_new_line(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_number`
[INFO] [stdout]    --> src/frontend/scanner.rs:163:8
[INFO] [stdout]     |
[INFO] [stdout] 163 |     fn scan_number(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scan_identifier`
[INFO] [stdout]    --> src/frontend/scanner.rs:186:8
[INFO] [stdout]     |
[INFO] [stdout] 186 |     fn scan_identifier(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `match_str`
[INFO] [stdout]    --> src/frontend/scanner.rs:201:8
[INFO] [stdout]     |
[INFO] [stdout] 201 |     fn match_str(&mut self, expected: &str) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `current_char`
[INFO] [stdout]    --> src/frontend/scanner.rs:210:8
[INFO] [stdout]     |
[INFO] [stdout] 210 |     fn current_char(&mut self) -> &str {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `advance`
[INFO] [stdout]    --> src/frontend/scanner.rs:214:8
[INFO] [stdout]     |
[INFO] [stdout] 214 |     fn advance(&mut self) -> Option<&str> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek`
[INFO] [stdout]    --> src/frontend/scanner.rs:220:8
[INFO] [stdout]     |
[INFO] [stdout] 220 |     fn peek(&mut self, n: Option<usize>) -> Option<&str> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_next`
[INFO] [stdout]    --> src/frontend/scanner.rs:234:8
[INFO] [stdout]     |
[INFO] [stdout] 234 |     fn peek_next(&mut self) -> Option<&str> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `create_token`
[INFO] [stdout]    --> src/frontend/scanner.rs:238:8
[INFO] [stdout]     |
[INFO] [stdout] 238 |     fn create_token(&mut self, t: TokenType, line: usize, val: String, pos: usize) -> Token {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_token`
[INFO] [stdout]    --> src/frontend/scanner.rs:244:8
[INFO] [stdout]     |
[INFO] [stdout] 244 |     fn add_token(&mut self, tok_type: TokenType) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `LoxKeywords` should have an upper case name
[INFO] [stdout]  --> src/frontend/keywords.rs:5:20
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub static ref LoxKeywords: HashMap<&'static str, TokenType> = {
[INFO] [stdout]   |                    ^^^^^^^^^^^ help: convert the identifier to upper case: `LOX_KEYWORDS`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 45 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core`
[INFO] [stdout]  --> src/cli/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core;
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/result.rs:73:32
[INFO] [stdout]    |
[INFO] [stdout] 73 |     fn cause(&self) -> Option<&error::Error> {
[INFO] [stdout]    |                                ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Arg`
[INFO] [stdout]  --> src/bin/lox/main.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | use clap::{Arg, App, SubCommand};
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Arg`
[INFO] [stdout]  --> src/bin/lox/main.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | use clap::{Arg, App, SubCommand};
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dist`
[INFO] [stdout]  --> src/bin/lox/commands/gen_ast.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn exec(dist: &str) {
[INFO] [stdout]   |             ^^^^ help: if this is intentional, prefix it with an underscore: `_dist`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `out_dir`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:23:15
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn define_ast(out_dir: &str, base_name: &str, ast_types: &Vec<&str>) {
[INFO] [stdout]    |               ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_out_dir`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `base_name`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:23:30
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn define_ast(out_dir: &str, base_name: &str, ast_types: &Vec<&str>) {
[INFO] [stdout]    |                              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_base_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ast_types`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:23:47
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn define_ast(out_dir: &str, base_name: &str, ast_types: &Vec<&str>) {
[INFO] [stdout]    |                                               ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ast_types`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:27:10
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn write(name: &str, content: &str) -> std::io::Result<()> {
[INFO] [stdout]    |          ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dist`
[INFO] [stdout]  --> src/bin/lox/commands/gen_ast.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn exec(dist: &str) {
[INFO] [stdout]   |             ^^^^ help: if this is intentional, prefix it with an underscore: `_dist`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `out_dir`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:23:15
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn define_ast(out_dir: &str, base_name: &str, ast_types: &Vec<&str>) {
[INFO] [stdout]    |               ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_out_dir`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `base_name`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:23:30
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn define_ast(out_dir: &str, base_name: &str, ast_types: &Vec<&str>) {
[INFO] [stdout]    |                              ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_base_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ast_types`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:23:47
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn define_ast(out_dir: &str, base_name: &str, ast_types: &Vec<&str>) {
[INFO] [stdout]    |                                               ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ast_types`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:27:10
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn write(name: &str, content: &str) -> std::io::Result<()> {
[INFO] [stdout]    |          ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gen_ast`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn gen_ast(out_dit: &str) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `define_ast`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn define_ast(out_dir: &str, base_name: &str, ast_types: &Vec<&str>) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `write`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn write(name: &str, content: &str) -> std::io::Result<()> {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gen_ast`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn gen_ast(out_dit: &str) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `define_ast`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn define_ast(out_dir: &str, base_name: &str, ast_types: &Vec<&str>) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `write`
[INFO] [stdout]   --> src/bin/lox/commands/gen_ast.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn write(name: &str, content: &str) -> std::io::Result<()> {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/result.rs:65:35
[INFO] [stdout]    |
[INFO] [stdout] 65 |             Error::IO(ref e) => e.description(),
[INFO] [stdout]    |                                   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::cause`: replaced by Error::source, which can support downcasting
[INFO] [stdout]   --> src/result.rs:75:35
[INFO] [stdout]    |
[INFO] [stdout] 75 |             Error::IO(ref e) => e.cause(),
[INFO] [stdout]    |                                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source`
[INFO] [stdout]   --> src/core/lox.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn run(source: &str) {}
[INFO] [stdout]    |            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/frontend/scanner.rs:143:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |         let content = self.slice(start, end);
[INFO] [stdout]     |                       ---- immutable borrow occurs here
[INFO] [stdout] 143 |         self.create_token(
[INFO] [stdout]     |         ^^^^ mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 146 |             content.to_string(),
[INFO] [stdout]     |             ------- immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mutable_borrow_reservation_conflict)]` on by default
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: cannot borrow `*self` as mutable because it is also borrowed as immutable
[INFO] [stdout]    --> src/frontend/scanner.rs:178:9
[INFO] [stdout]     |
[INFO] [stdout] 177 |         let value = self.slice(self.start, self.current);
[INFO] [stdout]     |                     ---- immutable borrow occurs here
[INFO] [stdout] 178 |         self.create_token(
[INFO] [stdout]     |         ^^^^ mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 181 |             value.to_string(),
[INFO] [stdout]     |             ----- immutable borrow later used here
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stdout]     = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]   --> src/core/lox.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn run(source: &str) {}
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `expressions`
[INFO] [stdout]   --> src/frontend/parser.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     fn expressions(&mut self) -> Result<Expr> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `equality`
[INFO] [stdout]   --> src/frontend/parser.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn equality(&mut self) -> Result<Expr> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `match_type`
[INFO] [stdout]   --> src/frontend/parser.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn match_type(&mut self, types: &Vec<TokenType>) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `expect_next`
[INFO] [stdout]   --> src/frontend/parser.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn expect_next(&mut self, types: &Vec<TokenType>) -> Result<&Token> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_error`
[INFO] [stdout]   --> src/frontend/parser.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn peek_error(&mut self) -> Error {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `advance`
[INFO] [stdout]   --> src/frontend/parser.rs:67:8
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn advance(&mut self) -> Option<&Token> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `previous`
[INFO] [stdout]   --> src/frontend/parser.rs:75:8
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn previous(&self) -> Option<&Token> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `check`
[INFO] [stdout]   --> src/frontend/parser.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn check(&self, t: &TokenType) -> bool {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_at_end`
[INFO] [stdout]   --> src/frontend/parser.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 |     fn is_at_end(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek`
[INFO] [stdout]   --> src/frontend/parser.rs:90:8
[INFO] [stdout]    |
[INFO] [stdout] 90 |     fn peek(&self) -> Option<&Token> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `comparison`
[INFO] [stdout]   --> src/frontend/parser.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn comparison(&mut self) -> Result<Expr> {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `addition`
[INFO] [stdout]    --> src/frontend/parser.rs:113:8
[INFO] [stdout]     |
[INFO] [stdout] 113 |     fn addition(&mut self) -> Result<Expr> {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mutilplication`
[INFO] [stdout]    --> src/frontend/parser.rs:126:8
[INFO] [stdout]     |
[INFO] [stdout] 126 |     fn mutilplication(&mut self) -> Result<Expr> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unray`
[INFO] [stdout]    --> src/frontend/parser.rs:132:8
[INFO] [stdout]     |
[INFO] [stdout] 132 |     fn unray(&mut self) -> Result<Expr> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `primary`
[INFO] [stdout]    --> src/frontend/parser.rs:143:8
[INFO] [stdout]     |
[INFO] [stdout] 143 |     fn primary(&mut self) -> Result<Expr> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `unexpected`
[INFO] [stdout]    --> src/frontend/parser.rs:163:8
[INFO] [stdout]     |
[INFO] [stdout] 163 |     fn unexpected(&mut self, t: &Token) -> Error {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `eof`
[INFO] [stdout]    --> src/frontend/parser.rs:172:8
[INFO] [stdout]     |
[INFO] [stdout] 172 |     fn eof(&self) -> Error {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `LoxKeywords` should have an upper case name
[INFO] [stdout]  --> src/frontend/keywords.rs:5:20
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub static ref LoxKeywords: HashMap<&'static str, TokenType> = {
[INFO] [stdout]   |                    ^^^^^^^^^^^ help: convert the identifier to upper case: `LOX_KEYWORDS`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 26 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.96s
[INFO] running `Command { std: "docker" "inspect" "6c24a43d03825cb258e9df479bd69092095a169975a054d5c61c047829b1ff15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c24a43d03825cb258e9df479bd69092095a169975a054d5c61c047829b1ff15", kill_on_drop: false }`
[INFO] [stdout] 6c24a43d03825cb258e9df479bd69092095a169975a054d5c61c047829b1ff15