[INFO] cloning repository https://github.com/anhvdq/lox-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anhvdq/lox-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanhvdq%2Flox-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanhvdq%2Flox-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8846b74eac7b4fa29c533ecf00d3821365e636fd
[INFO] checking anhvdq/lox-rs against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanhvdq%2Flox-rs" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/anhvdq/lox-rs on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/anhvdq/lox-rs
[INFO] finished tweaking git repo https://github.com/anhvdq/lox-rs
[INFO] tweaked toml for git repo https://github.com/anhvdq/lox-rs written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/anhvdq/lox-rs 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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6981a7b1dcda1856e5bcf3e6bbc1e684679dba9e33d8d45815ac1179a135dec4
[INFO] running `Command { std: "docker" "start" "-a" "6981a7b1dcda1856e5bcf3e6bbc1e684679dba9e33d8d45815ac1179a135dec4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6981a7b1dcda1856e5bcf3e6bbc1e684679dba9e33d8d45815ac1179a135dec4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6981a7b1dcda1856e5bcf3e6bbc1e684679dba9e33d8d45815ac1179a135dec4", kill_on_drop: false }`
[INFO] [stdout] 6981a7b1dcda1856e5bcf3e6bbc1e684679dba9e33d8d45815ac1179a135dec4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 955b7dd454e95f4ed18bcb2321c2683026ac1ebb4f9fbc8bfa9d5cb51d90c2f8
[INFO] running `Command { std: "docker" "start" "-a" "955b7dd454e95f4ed18bcb2321c2683026ac1ebb4f9fbc8bfa9d5cb51d90c2f8", kill_on_drop: false }`
[INFO] [stderr]     Checking lox-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::scanner::token::TokenType`
[INFO] [stdout]  --> src/ast/tree.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::scanner::token::TokenType;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `line` is never read
[INFO] [stdout]    --> src/scanner/token.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 110 | pub struct Token {
[INFO] [stdout]     |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 113 |     pub line: usize,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `process` is never used
[INFO] [stdout]  --> src/ast/tree.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub trait AstVisitor<R, C> {
[INFO] [stdout]   |           ---------- method in this trait
[INFO] [stdout] 5 |     fn process(&mut self, expr: &Expr, context: Option<&C>) -> R;
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `accept` is never used
[INFO] [stdout]   --> src/ast/tree.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub trait Walkable {
[INFO] [stdout]    |           -------- method in this trait
[INFO] [stdout] 14 |     fn accept<R, C>(&self, visitor: &mut dyn AstVisitor<R, C>, context: Option<&C>) -> R;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Binary`, `Unary`, `Grouping`, and `Literal` are never constructed
[INFO] [stdout]   --> src/ast/tree.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub enum Expr {
[INFO] [stdout]    |          ---- variants in this enum
[INFO] [stdout] 18 |     Binary(Binary),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 19 |     Unary(Unary),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 20 |     Grouping(Grouping),
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 21 |     Literal(Literal),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `left`, `operator`, and `right` are never read
[INFO] [stdout]   --> src/ast/tree.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct Binary {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 36 |     left: Box<Expr>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 37 |     operator: Token,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 38 |     right: Box<Expr>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `operator` and `right` are never read
[INFO] [stdout]   --> src/ast/tree.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub struct Unary {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 42 |     operator: Token,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 43 |     right: Box<Expr>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `expression` is never read
[INFO] [stdout]   --> src/ast/tree.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct Grouping {
[INFO] [stdout]    |            -------- field in this struct
[INFO] [stdout] 47 |     expression: Box<Expr>,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Number`, `String`, `Boolean`, and `Nil` are never constructed
[INFO] [stdout]   --> src/ast/tree.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub enum Literal {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] 51 |     Number(f64),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 52 |     String(String),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 53 |     Boolean(bool),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 54 |     Nil,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AstPrinter` is never constructed
[INFO] [stdout]   --> src/ast/tree.rs:57:8
[INFO] [stdout]    |
[INFO] [stdout] 57 | struct AstPrinter;
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `line` is never read
[INFO] [stdout]    --> src/scanner/token.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 110 | pub struct Token {
[INFO] [stdout]     |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 113 |     pub line: usize,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `String`, `Boolean`, and `Nil` are never constructed
[INFO] [stdout]   --> src/ast/tree.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub enum Literal {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] 51 |     Number(f64),
[INFO] [stdout] 52 |     String(String),
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 53 |     Boolean(bool),
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 54 |     Nil,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "955b7dd454e95f4ed18bcb2321c2683026ac1ebb4f9fbc8bfa9d5cb51d90c2f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "955b7dd454e95f4ed18bcb2321c2683026ac1ebb4f9fbc8bfa9d5cb51d90c2f8", kill_on_drop: false }`
[INFO] [stdout] 955b7dd454e95f4ed18bcb2321c2683026ac1ebb4f9fbc8bfa9d5cb51d90c2f8