[INFO] cloning repository https://github.com/leximainw/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/leximainw/lox_rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleximainw%2Flox_rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleximainw%2Flox_rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] db9ffe990a3be0267a075dd5e6b4772fb7f36294
[INFO] checking leximainw/lox_rs against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleximainw%2Flox_rs" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leximainw/lox_rs on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/leximainw/lox_rs
[INFO] finished tweaking git repo https://github.com/leximainw/lox_rs
[INFO] tweaked toml for git repo https://github.com/leximainw/lox_rs written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/leximainw/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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8874120ae3145cb8e985b047c3deb491fe77783d7b471df620a157f16921fdf
[INFO] running `Command { std: "docker" "start" "-a" "d8874120ae3145cb8e985b047c3deb491fe77783d7b471df620a157f16921fdf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8874120ae3145cb8e985b047c3deb491fe77783d7b471df620a157f16921fdf", kill_on_drop: false }`
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[INFO] [stdout] d8874120ae3145cb8e985b047c3deb491fe77783d7b471df620a157f16921fdf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c2c2b267e10e317b5f9723d6c208b9fe15acd2a880a1d60d6d0971cfd5db9f60
[INFO] running `Command { std: "docker" "start" "-a" "c2c2b267e10e317b5f9723d6c208b9fe15acd2a880a1d60d6d0971cfd5db9f60", kill_on_drop: false }`
[INFO] [stderr]     Checking lox_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `self::expr::Expr`
[INFO] [stdout]   --> src/lox_rs.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub use self::expr::Expr;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::lexer::Lexer`
[INFO] [stdout]   --> src/lox_rs.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub use self::lexer::Lexer;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::expr::Expr`
[INFO] [stdout]   --> src/lox_rs.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub use self::expr::Expr;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::lexer::Lexer`
[INFO] [stdout]   --> src/lox_rs.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub use self::lexer::Lexer;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]  --> src/lox_rs/closure.rs:7:28
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn call(&mut self, args: Vec<LoxValue>) -> Result<LoxValue, Backtrace> {
[INFO] [stdout]   |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]  --> src/lox_rs/closure.rs:7:28
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn call(&mut self, args: Vec<LoxValue>) -> Result<LoxValue, Backtrace> {
[INFO] [stdout]   |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token`
[INFO] [stdout]    --> src/lox_rs/parser.rs:822:25
[INFO] [stdout]     |
[INFO] [stdout] 822 |             if let Some(token) = self.lexer.next_if(|token| match token.kind {
[INFO] [stdout]     |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_token`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `comma`
[INFO] [stdout]    --> src/lox_rs/parser.rs:844:41
[INFO] [stdout]     |
[INFO] [stdout] 844 | ...                   if let Some(comma) = self.lexer.peek_if(|token| match token.kind {
[INFO] [stdout]     |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_comma`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/lox_rs.rs:109:26
[INFO] [stdout]     |
[INFO] [stdout] 109 |             LoxValue::Fn(value) => formatter.write_str("<function>"),
[INFO] [stdout]     |                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `token`
[INFO] [stdout]    --> src/lox_rs/parser.rs:822:25
[INFO] [stdout]     |
[INFO] [stdout] 822 |             if let Some(token) = self.lexer.next_if(|token| match token.kind {
[INFO] [stdout]     |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_token`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `comma`
[INFO] [stdout]    --> src/lox_rs/parser.rs:844:41
[INFO] [stdout]     |
[INFO] [stdout] 844 | ...                   if let Some(comma) = self.lexer.peek_if(|token| match token.kind {
[INFO] [stdout]     |                                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_comma`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Fn` is never constructed
[INFO] [stdout]   --> src/lox_rs.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub enum LoxValue {
[INFO] [stdout]    |          -------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 25 |     Fn(LoxClosure),
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LoxValue` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/lox_rs/backtrace.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | impl Backtrace {
[INFO] [stdout]   | -------------- associated function in this implementation
[INFO] [stdout] 7 |     pub fn new(error: String) -> Backtrace {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Critical`, `Warning`, and `Info` are never constructed
[INFO] [stdout]   --> src/lox_rs/errors.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub enum Severity {
[INFO] [stdout]    |          -------- variants in this enum
[INFO] [stdout] 69 |     Critical,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 70 |     Error,
[INFO] [stdout] 71 |     Warning,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 72 |     Info,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Severity` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]    --> src/lox_rs.rs:109:26
[INFO] [stdout]     |
[INFO] [stdout] 109 |             LoxValue::Fn(value) => formatter.write_str("<function>"),
[INFO] [stdout]     |                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Fn` is never constructed
[INFO] [stdout]   --> src/lox_rs.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub enum LoxValue {
[INFO] [stdout]    |          -------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 25 |     Fn(LoxClosure),
[INFO] [stdout]    |     ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LoxValue` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/lox_rs/backtrace.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | impl Backtrace {
[INFO] [stdout]   | -------------- associated function in this implementation
[INFO] [stdout] 7 |     pub fn new(error: String) -> Backtrace {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Critical`, `Warning`, and `Info` are never constructed
[INFO] [stdout]   --> src/lox_rs/errors.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub enum Severity {
[INFO] [stdout]    |          -------- variants in this enum
[INFO] [stdout] 69 |     Critical,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 70 |     Error,
[INFO] [stdout] 71 |     Warning,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 72 |     Info,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Severity` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "c2c2b267e10e317b5f9723d6c208b9fe15acd2a880a1d60d6d0971cfd5db9f60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2c2b267e10e317b5f9723d6c208b9fe15acd2a880a1d60d6d0971cfd5db9f60", kill_on_drop: false }`
[INFO] [stdout] c2c2b267e10e317b5f9723d6c208b9fe15acd2a880a1d60d6d0971cfd5db9f60