[INFO] cloning repository https://github.com/mov-rax/rlox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mov-rax/rlox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmov-rax%2Frlox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmov-rax%2Frlox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f5bab9555686cb94373d890cdb8dcc10ddabce50
[INFO] checking mov-rax/rlox against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmov-rax%2Frlox" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mov-rax/rlox
[INFO] finished tweaking git repo https://github.com/mov-rax/rlox
[INFO] tweaked toml for git repo https://github.com/mov-rax/rlox written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mov-rax/rlox on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mov-rax/rlox 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" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b176d6d7025f7f3a2e22b00abfa73a31b4d73a8bc7d5526a277cb27f4544de24
[INFO] running `Command { std: "docker" "start" "-a" "b176d6d7025f7f3a2e22b00abfa73a31b4d73a8bc7d5526a277cb27f4544de24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b176d6d7025f7f3a2e22b00abfa73a31b4d73a8bc7d5526a277cb27f4544de24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b176d6d7025f7f3a2e22b00abfa73a31b4d73a8bc7d5526a277cb27f4544de24", kill_on_drop: false }`
[INFO] [stdout] b176d6d7025f7f3a2e22b00abfa73a31b4d73a8bc7d5526a277cb27f4544de24
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 761c146132eb89d9adacc400d0ce0c6d195fbc02640af5d3490d11bcb06fa415
[INFO] running `Command { std: "docker" "start" "-a" "761c146132eb89d9adacc400d0ce0c6d195fbc02640af5d3490d11bcb06fa415", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking rlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Itertools`
[INFO] [stdout]  --> src/lox_lib.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 |     use itertools::{Itertools, PeekingNext};
[INFO] [stdout]   |                     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::lexer::Token`
[INFO] [stdout]    --> src/lox_lib.rs:292:9
[INFO] [stdout]     |
[INFO] [stdout] 292 |     use super::lexer::Token;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Context` and `Error`
[INFO] [stdout]    --> src/lox_lib.rs:316:18
[INFO] [stdout]     |
[INFO] [stdout] 316 |     use anyhow::{Context, Error, Result};
[INFO] [stdout]     |                  ^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]    --> src/lox_lib.rs:317:9
[INFO] [stdout]     |
[INFO] [stdout] 317 |     use itertools::Itertools;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::__std_iter::Peekable`
[INFO] [stdout]    --> src/lox_lib.rs:318:9
[INFO] [stdout]     |
[INFO] [stdout] 318 |     use itertools::__std_iter::Peekable;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::slice::Iter`
[INFO] [stdout]    --> src/lox_lib.rs:320:9
[INFO] [stdout]     |
[INFO] [stdout] 320 |     use std::slice::Iter;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Chars` and `FromStr`
[INFO] [stdout]    --> src/lox_lib.rs:321:20
[INFO] [stdout]     |
[INFO] [stdout] 321 |     use std::str::{Chars, FromStr};
[INFO] [stdout]     |                    ^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::lox_lib::lexer::Token::SemiColon`
[INFO] [stdout]    --> src/lox_lib.rs:322:9
[INFO] [stdout]     |
[INFO] [stdout] 322 |     use crate::lox_lib::lexer::Token::SemiColon;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::panic::catch_unwind`
[INFO] [stdout]    --> src/lox_lib.rs:323:9
[INFO] [stdout]     |
[INFO] [stdout] 323 |     use std::panic::catch_unwind;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Context` and `Error`
[INFO] [stdout]    --> src/lox_lib.rs:809:26
[INFO] [stdout]     |
[INFO] [stdout] 809 |     use anyhow::{anyhow, Context, Error, Result};
[INFO] [stdout]     |                          ^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::any::Any`
[INFO] [stdout]    --> src/lox_lib.rs:812:9
[INFO] [stdout]     |
[INFO] [stdout] 812 |     use std::any::Any;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]    --> src/lox_lib.rs:813:9
[INFO] [stdout]     |
[INFO] [stdout] 813 |     use std::collections::HashMap;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::parser::Expr`
[INFO] [stdout]     --> src/lox_lib.rs:1097:9
[INFO] [stdout]      |
[INFO] [stdout] 1097 |     use super::parser::Expr;
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Context` and `Error`
[INFO] [stdout]     --> src/lox_lib.rs:1099:26
[INFO] [stdout]      |
[INFO] [stdout] 1099 |     use anyhow::{Result, Error, Context, anyhow};
[INFO] [stdout]      |                          ^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lox_lib::lexer::Token`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use lox_lib::lexer::Token;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lox_lib::parser::Expr`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use lox_lib::parser::Expr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Itertools`
[INFO] [stdout]  --> src/lox_lib.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 |     use itertools::{Itertools, PeekingNext};
[INFO] [stdout]   |                     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::lexer::Token`
[INFO] [stdout]    --> src/lox_lib.rs:292:9
[INFO] [stdout]     |
[INFO] [stdout] 292 |     use super::lexer::Token;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Context` and `Error`
[INFO] [stdout]    --> src/lox_lib.rs:316:18
[INFO] [stdout]     |
[INFO] [stdout] 316 |     use anyhow::{Context, Error, Result};
[INFO] [stdout]     |                  ^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::Itertools`
[INFO] [stdout]    --> src/lox_lib.rs:317:9
[INFO] [stdout]     |
[INFO] [stdout] 317 |     use itertools::Itertools;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `itertools::__std_iter::Peekable`
[INFO] [stdout]    --> src/lox_lib.rs:318:9
[INFO] [stdout]     |
[INFO] [stdout] 318 |     use itertools::__std_iter::Peekable;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::slice::Iter`
[INFO] [stdout]    --> src/lox_lib.rs:320:9
[INFO] [stdout]     |
[INFO] [stdout] 320 |     use std::slice::Iter;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Chars` and `FromStr`
[INFO] [stdout]    --> src/lox_lib.rs:321:20
[INFO] [stdout]     |
[INFO] [stdout] 321 |     use std::str::{Chars, FromStr};
[INFO] [stdout]     |                    ^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::lox_lib::lexer::Token::SemiColon`
[INFO] [stdout]    --> src/lox_lib.rs:322:9
[INFO] [stdout]     |
[INFO] [stdout] 322 |     use crate::lox_lib::lexer::Token::SemiColon;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::panic::catch_unwind`
[INFO] [stdout]    --> src/lox_lib.rs:323:9
[INFO] [stdout]     |
[INFO] [stdout] 323 |     use std::panic::catch_unwind;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Context` and `Error`
[INFO] [stdout]    --> src/lox_lib.rs:809:26
[INFO] [stdout]     |
[INFO] [stdout] 809 |     use anyhow::{anyhow, Context, Error, Result};
[INFO] [stdout]     |                          ^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::any::Any`
[INFO] [stdout]    --> src/lox_lib.rs:812:9
[INFO] [stdout]     |
[INFO] [stdout] 812 |     use std::any::Any;
[INFO] [stdout]     |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]    --> src/lox_lib.rs:813:9
[INFO] [stdout]     |
[INFO] [stdout] 813 |     use std::collections::HashMap;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::parser::Expr`
[INFO] [stdout]     --> src/lox_lib.rs:1097:9
[INFO] [stdout]      |
[INFO] [stdout] 1097 |     use super::parser::Expr;
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Context` and `Error`
[INFO] [stdout]     --> src/lox_lib.rs:1099:26
[INFO] [stdout]      |
[INFO] [stdout] 1099 |     use anyhow::{Result, Error, Context, anyhow};
[INFO] [stdout]      |                          ^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lox_lib::lexer::Token`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use lox_lib::lexer::Token;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lox_lib::parser::Expr`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use lox_lib::parser::Expr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `len` is assigned to, but never used
[INFO] [stdout]    --> src/lox_lib.rs:175:29
[INFO] [stdout]     |
[INFO] [stdout] 175 |                         let mut len = 0;
[INFO] [stdout]     |                             ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_len` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `len` is never read
[INFO] [stdout]    --> src/lox_lib.rs:179:33
[INFO] [stdout]     |
[INFO] [stdout] 179 | ...                   len += 1;
[INFO] [stdout]     |                       ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `len` is never read
[INFO] [stdout]    --> src/lox_lib.rs:187:33
[INFO] [stdout]     |
[INFO] [stdout] 187 | ...                   len += 1;
[INFO] [stdout]     |                       ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `len` is never read
[INFO] [stdout]    --> src/lox_lib.rs:199:41
[INFO] [stdout]     |
[INFO] [stdout] 199 | ...                   len += 1;
[INFO] [stdout]     |                       ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]    --> src/lox_lib.rs:372:17
[INFO] [stdout]     |
[INFO] [stdout] 372 |                 other => panic!("Tried to unwrap a {:?} as a WhileStmt!")
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `grouping_expr`
[INFO] [stdout]    --> src/lox_lib.rs:840:35
[INFO] [stdout]     |
[INFO] [stdout] 840 |             if let Expr::Grouping(grouping_expr) = expr {
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_grouping_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/lox_lib.rs:849:34
[INFO] [stdout]     |
[INFO] [stdout] 849 |                 Expr::Unary(tok, e) => {
[INFO] [stdout]     |                                  ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `parse` is never used
[INFO] [stdout]    --> src/lox_lib.rs:463:16
[INFO] [stdout]     |
[INFO] [stdout] 450 |     impl Parser {
[INFO] [stdout]     |     ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 463 |         pub fn parse(&mut self) -> Result<Expr> {
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]    --> src/lox_lib.rs:372:52
[INFO] [stdout]     |
[INFO] [stdout] 372 |                 other => panic!("Tried to unwrap a {:?} as a WhileStmt!")
[INFO] [stdout]     |                                                    ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]     |
[INFO] [stdout] 372 |                 other => panic!("Tried to unwrap a {:?} as a WhileStmt!", ...)
[INFO] [stdout]     |                                                                         +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 372 |                 other => panic!("{}", "Tried to unwrap a {:?} as a WhileStmt!")
[INFO] [stdout]     |                                 +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lox_lib.rs:998:13
[INFO] [stdout]     |
[INFO] [stdout] 998 |             self.execute_all(statements);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 998 |             let _ = self.execute_all(statements);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `len` is assigned to, but never used
[INFO] [stdout]    --> src/lox_lib.rs:175:29
[INFO] [stdout]     |
[INFO] [stdout] 175 |                         let mut len = 0;
[INFO] [stdout]     |                             ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_len` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `len` is never read
[INFO] [stdout]    --> src/lox_lib.rs:179:33
[INFO] [stdout]     |
[INFO] [stdout] 179 | ...                   len += 1;
[INFO] [stdout]     |                       ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `len` is never read
[INFO] [stdout]    --> src/lox_lib.rs:187:33
[INFO] [stdout]     |
[INFO] [stdout] 187 | ...                   len += 1;
[INFO] [stdout]     |                       ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `len` is never read
[INFO] [stdout]    --> src/lox_lib.rs:199:41
[INFO] [stdout]     |
[INFO] [stdout] 199 | ...                   len += 1;
[INFO] [stdout]     |                       ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]    --> src/lox_lib.rs:372:17
[INFO] [stdout]     |
[INFO] [stdout] 372 |                 other => panic!("Tried to unwrap a {:?} as a WhileStmt!")
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `grouping_expr`
[INFO] [stdout]    --> src/lox_lib.rs:840:35
[INFO] [stdout]     |
[INFO] [stdout] 840 |             if let Expr::Grouping(grouping_expr) = expr {
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_grouping_expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/lox_lib.rs:849:34
[INFO] [stdout]     |
[INFO] [stdout] 849 |                 Expr::Unary(tok, e) => {
[INFO] [stdout]     |                                  ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `parse` is never used
[INFO] [stdout]    --> src/lox_lib.rs:463:16
[INFO] [stdout]     |
[INFO] [stdout] 450 |     impl Parser {
[INFO] [stdout]     |     ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 463 |         pub fn parse(&mut self) -> Result<Expr> {
[INFO] [stdout]     |                ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]    --> src/lox_lib.rs:372:52
[INFO] [stdout]     |
[INFO] [stdout] 372 |                 other => panic!("Tried to unwrap a {:?} as a WhileStmt!")
[INFO] [stdout]     |                                                    ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]     |
[INFO] [stdout] 372 |                 other => panic!("Tried to unwrap a {:?} as a WhileStmt!", ...)
[INFO] [stdout]     |                                                                         +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]     |
[INFO] [stdout] 372 |                 other => panic!("{}", "Tried to unwrap a {:?} as a WhileStmt!")
[INFO] [stdout]     |                                 +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lox_lib.rs:998:13
[INFO] [stdout]     |
[INFO] [stdout] 998 |             self.execute_all(statements);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 998 |             let _ = self.execute_all(statements);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.20s
[INFO] running `Command { std: "docker" "inspect" "761c146132eb89d9adacc400d0ce0c6d195fbc02640af5d3490d11bcb06fa415", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "761c146132eb89d9adacc400d0ce0c6d195fbc02640af5d3490d11bcb06fa415", kill_on_drop: false }`
[INFO] [stdout] 761c146132eb89d9adacc400d0ce0c6d195fbc02640af5d3490d11bcb06fa415
