[INFO] cloning repository https://github.com/AmirAbdRazak/lox-interpreter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AmirAbdRazak/lox-interpreter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAmirAbdRazak%2Flox-interpreter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAmirAbdRazak%2Flox-interpreter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e1274b21f4900a004ecdd2a90a0764385e0065fb
[INFO] checking AmirAbdRazak/lox-interpreter against master#3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0 for pr-143164
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAmirAbdRazak%2Flox-interpreter" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AmirAbdRazak/lox-interpreter
[INFO] finished tweaking git repo https://github.com/AmirAbdRazak/lox-interpreter
[INFO] tweaked toml for git repo https://github.com/AmirAbdRazak/lox-interpreter written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AmirAbdRazak/lox-interpreter on toolchain 3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AmirAbdRazak/lox-interpreter 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" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 090bcdab9a925e31cac29230f63973938206549d0aec7f7a0c236d30abd5b1bc
[INFO] running `Command { std: "docker" "start" "-a" "090bcdab9a925e31cac29230f63973938206549d0aec7f7a0c236d30abd5b1bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "090bcdab9a925e31cac29230f63973938206549d0aec7f7a0c236d30abd5b1bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "090bcdab9a925e31cac29230f63973938206549d0aec7f7a0c236d30abd5b1bc", kill_on_drop: false }`
[INFO] [stdout] 090bcdab9a925e31cac29230f63973938206549d0aec7f7a0c236d30abd5b1bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+3129d37ef7075ee3cbaa3d6cbe1b5794f67192b0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d386043b38ec05f7c520aa58223531df46161ff4a1a46a5170ec8dccc2f4bdfd
[INFO] running `Command { std: "docker" "start" "-a" "d386043b38ec05f7c520aa58223531df46161ff4a1a46a5170ec8dccc2f4bdfd", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.85
[INFO] [stderr]    Compiling serde v1.0.203
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.66
[INFO] [stderr]    Compiling serde_derive v1.0.203
[INFO] [stderr]     Checking basic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/interpreter.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |             _ => unreachable!(),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/interpreter.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 11 | /             Expr::Binary(BinaryExpr {
[INFO] [stdout] 12 | |                 left: left_expr,
[INFO] [stdout] 13 | |                 operator,
[INFO] [stdout] 14 | |                 right: right_expr,
[INFO] [stdout] 15 | |             }) => {
[INFO] [stdout]    | |______________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 19 | /             Expr::Unary(UnaryExpr {
[INFO] [stdout] 20 | |                 operator,
[INFO] [stdout] 21 | |                 right: right_expr,
[INFO] [stdout] 22 | |             }) => {
[INFO] [stdout]    | |______________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 25 |               Expr::Literal(lit) => {}
[INFO] [stdout]    |               ------------------ matches some of the same values
[INFO] [stdout] 26 |               Expr::Grouping(Grouping { expression }) => {
[INFO] [stdout]    |               --------------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 30 |               _ => unreachable!(),
[INFO] [stdout]    |               ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operator`
[INFO] [stdout]   --> src/interpreter.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 |                 operator,
[INFO] [stdout]    |                 ^^^^^^^^ help: try ignoring the field: `operator: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right`
[INFO] [stdout]   --> src/interpreter.rs:16:21
[INFO] [stdout]    |
[INFO] [stdout] 16 |                 let right = self.visit_expression(right_expr)?;
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left`
[INFO] [stdout]   --> src/interpreter.rs:17:21
[INFO] [stdout]    |
[INFO] [stdout] 17 |                 let left = self.visit_expression(left_expr)?;
[INFO] [stdout]    |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_left`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operator`
[INFO] [stdout]   --> src/interpreter.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |                 operator,
[INFO] [stdout]    |                 ^^^^^^^^ help: try ignoring the field: `operator: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right`
[INFO] [stdout]   --> src/interpreter.rs:23:21
[INFO] [stdout]    |
[INFO] [stdout] 23 |                 let right = self.visit_expression(right_expr)?;
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lit`
[INFO] [stdout]   --> src/interpreter.rs:25:27
[INFO] [stdout]    |
[INFO] [stdout] 25 |             Expr::Literal(lit) => {}
[INFO] [stdout]    |                           ^^^ help: if this is intentional, prefix it with an underscore: `_lit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/interpreter.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout] 27 |                 let expr = self.visit_expression(expression)?;
[INFO] [stdout]    |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Interpreter` is never constructed
[INFO] [stdout]  --> src/interpreter.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Interpreter {}
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Number` is never constructed
[INFO] [stdout]   --> src/interpreter.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub enum Types {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] 38 |     Number(f64),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `line` is never used
[INFO] [stdout]   --> src/parser.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl ParserError {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 55 |     pub fn line(&self) -> usize {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `synchronize` is never used
[INFO] [stdout]    --> src/parser.rs:220:8
[INFO] [stdout]     |
[INFO] [stdout] 70  | impl Parser {
[INFO] [stdout]     | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 220 |     fn synchronize(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `UnaryOperator` is never used
[INFO] [stdout]  --> src/syntax.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum UnaryOperator {
[INFO] [stdout]   |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `BinaryOperator` is never used
[INFO] [stdout]   --> src/syntax.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum BinaryOperator {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Print` is never constructed
[INFO] [stdout]   --> src/token.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | pub enum TokenType {
[INFO] [stdout]    |          --------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 43 |     Print,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TokenType` 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 function `new` is never used
[INFO] [stdout]   --> src/token.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 60 | impl Token {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 61 |     pub fn new(token_type: TokenType, line: usize) -> Token {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `MutVisitor` is never used
[INFO] [stdout]  --> src/visit.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait MutVisitor {
[INFO] [stdout]   |           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/scanner.rs:58:24
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn new(source: &str) -> Scanner {
[INFO] [stdout]    |                        ^^^^     ------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn new(source: &str) -> Scanner<'_> {
[INFO] [stdout]    |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/interpreter.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |             _ => unreachable!(),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/interpreter.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 11 | /             Expr::Binary(BinaryExpr {
[INFO] [stdout] 12 | |                 left: left_expr,
[INFO] [stdout] 13 | |                 operator,
[INFO] [stdout] 14 | |                 right: right_expr,
[INFO] [stdout] 15 | |             }) => {
[INFO] [stdout]    | |______________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 19 | /             Expr::Unary(UnaryExpr {
[INFO] [stdout] 20 | |                 operator,
[INFO] [stdout] 21 | |                 right: right_expr,
[INFO] [stdout] 22 | |             }) => {
[INFO] [stdout]    | |______________- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 25 |               Expr::Literal(lit) => {}
[INFO] [stdout]    |               ------------------ matches some of the same values
[INFO] [stdout] 26 |               Expr::Grouping(Grouping { expression }) => {
[INFO] [stdout]    |               --------------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 30 |               _ => unreachable!(),
[INFO] [stdout]    |               ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operator`
[INFO] [stdout]   --> src/interpreter.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 |                 operator,
[INFO] [stdout]    |                 ^^^^^^^^ help: try ignoring the field: `operator: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right`
[INFO] [stdout]   --> src/interpreter.rs:16:21
[INFO] [stdout]    |
[INFO] [stdout] 16 |                 let right = self.visit_expression(right_expr)?;
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left`
[INFO] [stdout]   --> src/interpreter.rs:17:21
[INFO] [stdout]    |
[INFO] [stdout] 17 |                 let left = self.visit_expression(left_expr)?;
[INFO] [stdout]    |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_left`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `operator`
[INFO] [stdout]   --> src/interpreter.rs:20:17
[INFO] [stdout]    |
[INFO] [stdout] 20 |                 operator,
[INFO] [stdout]    |                 ^^^^^^^^ help: try ignoring the field: `operator: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right`
[INFO] [stdout]   --> src/interpreter.rs:23:21
[INFO] [stdout]    |
[INFO] [stdout] 23 |                 let right = self.visit_expression(right_expr)?;
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_right`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lit`
[INFO] [stdout]   --> src/interpreter.rs:25:27
[INFO] [stdout]    |
[INFO] [stdout] 25 |             Expr::Literal(lit) => {}
[INFO] [stdout]    |                           ^^^ help: if this is intentional, prefix it with an underscore: `_lit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/interpreter.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout] 27 |                 let expr = self.visit_expression(expression)?;
[INFO] [stdout]    |                     ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Interpreter` is never constructed
[INFO] [stdout]  --> src/interpreter.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Interpreter {}
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Number` is never constructed
[INFO] [stdout]   --> src/interpreter.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub enum Types {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] 38 |     Number(f64),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `line` is never used
[INFO] [stdout]   --> src/parser.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl ParserError {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 55 |     pub fn line(&self) -> usize {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `synchronize` is never used
[INFO] [stdout]    --> src/parser.rs:220:8
[INFO] [stdout]     |
[INFO] [stdout] 70  | impl Parser {
[INFO] [stdout]     | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 220 |     fn synchronize(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `UnaryOperator` is never used
[INFO] [stdout]  --> src/syntax.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum UnaryOperator {
[INFO] [stdout]   |          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `BinaryOperator` is never used
[INFO] [stdout]   --> src/syntax.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum BinaryOperator {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Print` is never constructed
[INFO] [stdout]   --> src/token.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | pub enum TokenType {
[INFO] [stdout]    |          --------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 43 |     Print,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TokenType` 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 function `new` is never used
[INFO] [stdout]   --> src/token.rs:61:12
[INFO] [stdout]    |
[INFO] [stdout] 60 | impl Token {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 61 |     pub fn new(token_type: TokenType, line: usize) -> Token {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `MutVisitor` is never used
[INFO] [stdout]  --> src/visit.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait MutVisitor {
[INFO] [stdout]   |           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/scanner.rs:58:24
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn new(source: &str) -> Scanner {
[INFO] [stdout]    |                        ^^^^     ------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn new(source: &str) -> Scanner<'_> {
[INFO] [stdout]    |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.24s
[INFO] running `Command { std: "docker" "inspect" "d386043b38ec05f7c520aa58223531df46161ff4a1a46a5170ec8dccc2f4bdfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d386043b38ec05f7c520aa58223531df46161ff4a1a46a5170ec8dccc2f4bdfd", kill_on_drop: false }`
[INFO] [stdout] d386043b38ec05f7c520aa58223531df46161ff4a1a46a5170ec8dccc2f4bdfd
