[INFO] cloning repository https://github.com/ShivanshuKantPrasad/lox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ShivanshuKantPrasad/lox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShivanshuKantPrasad%2Flox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShivanshuKantPrasad%2Flox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 06a7b994e0789bede1b7111d87c2bcf934e07239
[INFO] checking ShivanshuKantPrasad/lox/06a7b994e0789bede1b7111d87c2bcf934e07239 against master#91c0823ee63e793d990bb9fed898dc95b5d6db51 for pr-125741
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FShivanshuKantPrasad%2Flox" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ShivanshuKantPrasad/lox on toolchain 91c0823ee63e793d990bb9fed898dc95b5d6db51
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+91c0823ee63e793d990bb9fed898dc95b5d6db51" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ShivanshuKantPrasad/lox
[INFO] finished tweaking git repo https://github.com/ShivanshuKantPrasad/lox
[INFO] tweaked toml for git repo https://github.com/ShivanshuKantPrasad/lox written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ShivanshuKantPrasad/lox 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" "+91c0823ee63e793d990bb9fed898dc95b5d6db51" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+91c0823ee63e793d990bb9fed898dc95b5d6db51" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a185e54d6b522058eb31be56022b8addb63f3feacff0b051c85833f541934792
[INFO] running `Command { std: "docker" "start" "-a" "a185e54d6b522058eb31be56022b8addb63f3feacff0b051c85833f541934792", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a185e54d6b522058eb31be56022b8addb63f3feacff0b051c85833f541934792", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a185e54d6b522058eb31be56022b8addb63f3feacff0b051c85833f541934792", kill_on_drop: false }`
[INFO] [stdout] a185e54d6b522058eb31be56022b8addb63f3feacff0b051c85833f541934792
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+91c0823ee63e793d990bb9fed898dc95b5d6db51" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33edbecc2ecf5bc15ff6b171721b709c35ddb9c5c5c59e8d5032a5cfa393d472
[INFO] running `Command { std: "docker" "start" "-a" "33edbecc2ecf5bc15ff6b171721b709c35ddb9c5c5c59e8d5032a5cfa393d472", kill_on_drop: false }`
[INFO] [stderr]    Compiling paste v1.0.11
[INFO] [stderr]     Checking lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `core::any::Any`
[INFO] [stdout]  --> src/expr.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::any::Any;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::any::Any`
[INFO] [stdout]  --> src/expr.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::any::Any;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/expr.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let x: Box<String> = Box::new("Hello".to_string());
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/expr.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let x: Box<String> = Box::new("Hello".to_string());
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[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/expr.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expr` is never used
[INFO] [stdout]   --> src/expr.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 |    Expr,
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `accept` is never used
[INFO] [stdout]   --> src/ast.rs:10:20
[INFO] [stdout]    |
[INFO] [stdout] 9  |           impl Expr {
[INFO] [stdout]    |           --------- method in this implementation
[INFO] [stdout] 10 |               pub fn accept<T>(&self, paste!([<$class:lower _visitor>]): &dyn ExprVisitor<T>)
[INFO] [stdout]    |                      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ExprVisitor` is never used
[INFO] [stdout]   --> src/ast.rs:17:26
[INFO] [stdout]    |
[INFO] [stdout] 17 |           paste!(pub trait [< $class Visitor >]<T> {
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BinaryExpr` is never constructed
[INFO] [stdout]   --> src/ast.rs:21:29
[INFO] [stdout]    |
[INFO] [stdout] 21 |           paste!($(pub struct [<$rule Expr>] {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GroupingExpr` is never constructed
[INFO] [stdout]   --> src/ast.rs:21:29
[INFO] [stdout]    |
[INFO] [stdout] 21 |           paste!($(pub struct [<$rule Expr>] {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LiteralExpr` is never constructed
[INFO] [stdout]   --> src/ast.rs:21:29
[INFO] [stdout]    |
[INFO] [stdout] 21 |           paste!($(pub struct [<$rule Expr>] {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UnaryExpr` is never constructed
[INFO] [stdout]   --> src/ast.rs:21:29
[INFO] [stdout]    |
[INFO] [stdout] 21 |           paste!($(pub struct [<$rule Expr>] {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `accept` is never used
[INFO] [stdout]   --> src/ast.rs:26:24
[INFO] [stdout]    |
[INFO] [stdout] 25 |               impl [< $rule Expr >]{
[INFO] [stdout]    |               --------------------- method in this implementation
[INFO] [stdout] 26 |                   pub fn accept<T>(&self, visitor: &dyn[< $class Visitor>]<T>)
[INFO] [stdout]    |                          ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Break` is never constructed
[INFO] [stdout]  --> src/token.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Token {
[INFO] [stdout]   |          ----- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 6 |     Break,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Token` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/expr.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expr` is never used
[INFO] [stdout]   --> src/expr.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 |    Expr,
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `accept` is never used
[INFO] [stdout]   --> src/ast.rs:10:20
[INFO] [stdout]    |
[INFO] [stdout] 9  |           impl Expr {
[INFO] [stdout]    |           --------- method in this implementation
[INFO] [stdout] 10 |               pub fn accept<T>(&self, paste!([<$class:lower _visitor>]): &dyn ExprVisitor<T>)
[INFO] [stdout]    |                      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ExprVisitor` is never used
[INFO] [stdout]   --> src/ast.rs:17:26
[INFO] [stdout]    |
[INFO] [stdout] 17 |           paste!(pub trait [< $class Visitor >]<T> {
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BinaryExpr` is never constructed
[INFO] [stdout]   --> src/ast.rs:21:29
[INFO] [stdout]    |
[INFO] [stdout] 21 |           paste!($(pub struct [<$rule Expr>] {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `GroupingExpr` is never constructed
[INFO] [stdout]   --> src/ast.rs:21:29
[INFO] [stdout]    |
[INFO] [stdout] 21 |           paste!($(pub struct [<$rule Expr>] {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LiteralExpr` is never constructed
[INFO] [stdout]   --> src/ast.rs:21:29
[INFO] [stdout]    |
[INFO] [stdout] 21 |           paste!($(pub struct [<$rule Expr>] {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UnaryExpr` is never constructed
[INFO] [stdout]   --> src/ast.rs:21:29
[INFO] [stdout]    |
[INFO] [stdout] 21 |           paste!($(pub struct [<$rule Expr>] {
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `accept` is never used
[INFO] [stdout]   --> src/ast.rs:26:24
[INFO] [stdout]    |
[INFO] [stdout] 25 |               impl [< $rule Expr >]{
[INFO] [stdout]    |               --------------------- method in this implementation
[INFO] [stdout] 26 |                   pub fn accept<T>(&self, visitor: &dyn[< $class Visitor>]<T>)
[INFO] [stdout]    |                          ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/expr.rs:9:1
[INFO] [stdout]    |
[INFO] [stdout] 9  | / define_ast!(
[INFO] [stdout] 10 | |    Expr,
[INFO] [stdout] 11 | |    (Binary   -> left : Box<Expr> , operator : Token, right : Box<Expr>),
[INFO] [stdout] 12 | |    (Grouping -> expression : Box<Expr>),
[INFO] [stdout] 13 | |    (Literal  -> value : Token),
[INFO] [stdout] 14 | |    (Unary    -> operator : Token, right : Box<Expr>)
[INFO] [stdout] 15 | | );
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `define_ast` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Break` is never constructed
[INFO] [stdout]  --> src/token.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Token {
[INFO] [stdout]   |          ----- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 6 |     Break,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Token` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "33edbecc2ecf5bc15ff6b171721b709c35ddb9c5c5c59e8d5032a5cfa393d472", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33edbecc2ecf5bc15ff6b171721b709c35ddb9c5c5c59e8d5032a5cfa393d472", kill_on_drop: false }`
[INFO] [stdout] 33edbecc2ecf5bc15ff6b171721b709c35ddb9c5c5c59e8d5032a5cfa393d472