[INFO] cloning repository https://github.com/Laegel/rox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Laegel/rox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLaegel%2Frox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLaegel%2Frox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5bee60f9d5eeb04bbeefd574aa929be39f3c5e7a
[INFO] testing Laegel/rox against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLaegel%2Frox" "/workspace/builds/worker-78/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-78/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Laegel/rox on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Laegel/rox
[INFO] finished tweaking git repo https://github.com/Laegel/rox
[INFO] tweaked toml for git repo https://github.com/Laegel/rox written to /workspace/builds/worker-78/source/Cargo.toml
[INFO] crate git repo https://github.com/Laegel/rox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe93f3a721c9f782b47d2b982fda7bfc2626eb9aebc0a1f4fde7dfa4276bc717
[INFO] running `Command { std: "docker" "start" "-a" "fe93f3a721c9f782b47d2b982fda7bfc2626eb9aebc0a1f4fde7dfa4276bc717", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe93f3a721c9f782b47d2b982fda7bfc2626eb9aebc0a1f4fde7dfa4276bc717", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe93f3a721c9f782b47d2b982fda7bfc2626eb9aebc0a1f4fde7dfa4276bc717", kill_on_drop: false }`
[INFO] [stdout] fe93f3a721c9f782b47d2b982fda7bfc2626eb9aebc0a1f4fde7dfa4276bc717
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3012f115d325d86e80e4421dfc86d96cba49a004544cfaf52f861b45561afead
[INFO] running `Command { std: "docker" "start" "-a" "3012f115d325d86e80e4421dfc86d96cba49a004544cfaf52f861b45561afead", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `Eof`
[INFO] [stdout]   --> src/token.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     Eof,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/token.rs:3:10
[INFO] [stdout]    |
[INFO] [stdout] 3  | #[derive(Debug, PartialEq)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_string`
[INFO] [stdout]   --> src/token.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn to_string(self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `LoxError`
[INFO] [stdout]  --> src/errors.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct LoxError {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Unary`
[INFO] [stdout]  --> src/expr.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Unary(Token, Box<Expr>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/expr.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[derive(Debug, PartialEq)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Binary`
[INFO] [stdout]  --> src/expr.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Binary(Box<Expr>, Token, Box<Expr>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/expr.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[derive(Debug, PartialEq)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Grouping`
[INFO] [stdout]  --> src/expr.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Grouping(Box<Expr>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/expr.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[derive(Debug, PartialEq)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Literal`
[INFO] [stdout]  --> src/expr.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Literal(Token),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/expr.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[derive(Debug, PartialEq)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print`
[INFO] [stdout]   --> src/expr.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn print(&mut self, expr: &Expr) -> String {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.94s
[INFO] running `Command { std: "docker" "inspect" "3012f115d325d86e80e4421dfc86d96cba49a004544cfaf52f861b45561afead", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3012f115d325d86e80e4421dfc86d96cba49a004544cfaf52f861b45561afead", kill_on_drop: false }`
[INFO] [stdout] 3012f115d325d86e80e4421dfc86d96cba49a004544cfaf52f861b45561afead
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2be514037cbdb25ebd2a04473ef1341629a01f2c7a2390ccd922e229edfac6d1
[INFO] running `Command { std: "docker" "start" "-a" "2be514037cbdb25ebd2a04473ef1341629a01f2c7a2390ccd922e229edfac6d1", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] warning: variant is never constructed: `Eof`
[INFO] [stdout]   --> src/token.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     Eof,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/token.rs:3:10
[INFO] [stdout]    |
[INFO] [stdout] 3  | #[derive(Debug, PartialEq)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust-lox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `to_string`
[INFO] [stdout]   --> src/token.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn to_string(self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `LoxError`
[INFO] [stdout]  --> src/errors.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct LoxError {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Unary`
[INFO] [stdout]  --> src/expr.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Unary(Token, Box<Expr>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/expr.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[derive(Debug, PartialEq)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Binary`
[INFO] [stdout]  --> src/expr.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Binary(Box<Expr>, Token, Box<Expr>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/expr.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[derive(Debug, PartialEq)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Grouping`
[INFO] [stdout]  --> src/expr.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Grouping(Box<Expr>),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/expr.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[derive(Debug, PartialEq)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Literal`
[INFO] [stdout]  --> src/expr.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Literal(Token),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]  --> src/expr.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | #[derive(Debug, PartialEq)]
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `print`
[INFO] [stdout]   --> src/expr.rs:56:12
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn print(&mut self, expr: &Expr) -> String {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Eof`
[INFO] [stdout]   --> src/token.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     Eof,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/token.rs:3:10
[INFO] [stdout]    |
[INFO] [stdout] 3  | #[derive(Debug, PartialEq)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `to_string`
[INFO] [stdout]   --> src/token.rs:89:12
[INFO] [stdout]    |
[INFO] [stdout] 89 |     pub fn to_string(self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `LoxError`
[INFO] [stdout]  --> src/errors.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct LoxError {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `Command { std: "docker" "inspect" "2be514037cbdb25ebd2a04473ef1341629a01f2c7a2390ccd922e229edfac6d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2be514037cbdb25ebd2a04473ef1341629a01f2c7a2390ccd922e229edfac6d1", kill_on_drop: false }`
[INFO] [stdout] 2be514037cbdb25ebd2a04473ef1341629a01f2c7a2390ccd922e229edfac6d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-78/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] eeabf56e276d223db8a37704b35f106cb9ee0b8809cc7642b24bf3b6f7ff415e
[INFO] running `Command { std: "docker" "start" "-a" "eeabf56e276d223db8a37704b35f106cb9ee0b8809cc7642b24bf3b6f7ff415e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: variant is never constructed: `Eof`
[INFO] [stderr]   --> src/token.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 |     Eof,
[INFO] [stderr]    |     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/token.rs:3:10
[INFO] [stderr]    |
[INFO] [stderr] 3  | #[derive(Debug, PartialEq)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `to_string`
[INFO] [stderr]   --> src/token.rs:89:12
[INFO] [stderr]    |
[INFO] [stderr] 89 |     pub fn to_string(self) -> String {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `LoxError`
[INFO] [stderr]  --> src/errors.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub struct LoxError {
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Unary`
[INFO] [stderr]  --> src/expr.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Unary(Token, Box<Expr>),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]  --> src/expr.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[derive(Debug, PartialEq)]
[INFO] [stderr]   |          ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Binary`
[INFO] [stderr]  --> src/expr.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Binary(Box<Expr>, Token, Box<Expr>),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]  --> src/expr.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[derive(Debug, PartialEq)]
[INFO] [stderr]   |          ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Grouping`
[INFO] [stderr]  --> src/expr.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Grouping(Box<Expr>),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]  --> src/expr.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[derive(Debug, PartialEq)]
[INFO] [stderr]   |          ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Literal`
[INFO] [stderr]  --> src/expr.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     Literal(Token),
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]  --> src/expr.rs:2:10
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[derive(Debug, PartialEq)]
[INFO] [stderr]   |          ^^^^^
[INFO] [stderr]   = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print`
[INFO] [stderr]   --> src/expr.rs:56:12
[INFO] [stderr]    |
[INFO] [stderr] 56 |     pub fn print(&mut self, expr: &Expr) -> String {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-lox` (lib) generated 8 warnings
[INFO] [stderr] warning: `rust-lox` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.62s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/loxlib-4c5365efab89cb67)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/loxbin-971aabc56116a294)
[INFO] [stdout] running 1 test
[INFO] [stdout] test expr::tests::print_visit ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests loxlib
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "eeabf56e276d223db8a37704b35f106cb9ee0b8809cc7642b24bf3b6f7ff415e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eeabf56e276d223db8a37704b35f106cb9ee0b8809cc7642b24bf3b6f7ff415e", kill_on_drop: false }`
[INFO] [stdout] eeabf56e276d223db8a37704b35f106cb9ee0b8809cc7642b24bf3b6f7ff415e