[INFO] cloning repository https://github.com/JasonTulp/jasn-ast
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JasonTulp/jasn-ast" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJasonTulp%2Fjasn-ast", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJasonTulp%2Fjasn-ast'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 627f957334123be6222bdc578f139b766685159d
[INFO] checking JasonTulp/jasn-ast against try#7dabc88a3b6768751847baeb49983f31ac5f20e2 for pr-155945
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJasonTulp%2Fjasn-ast" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-0-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/JasonTulp/jasn-ast
[INFO] finished tweaking git repo https://github.com/JasonTulp/jasn-ast
[INFO] tweaked toml for git repo https://github.com/JasonTulp/jasn-ast written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/JasonTulp/jasn-ast on toolchain 7dabc88a3b6768751847baeb49983f31ac5f20e2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7dabc88a3b6768751847baeb49983f31ac5f20e2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/JasonTulp/jasn-ast 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" "+7dabc88a3b6768751847baeb49983f31ac5f20e2" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v2.0.76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+7dabc88a3b6768751847baeb49983f31ac5f20e2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5fde90c3c2e516dd13b00189df73322eeb36d660758c2382272531a16c1b0b3e
[INFO] running `Command { std: "docker" "start" "-a" "5fde90c3c2e516dd13b00189df73322eeb36d660758c2382272531a16c1b0b3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5fde90c3c2e516dd13b00189df73322eeb36d660758c2382272531a16c1b0b3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fde90c3c2e516dd13b00189df73322eeb36d660758c2382272531a16c1b0b3e", kill_on_drop: false }`
[INFO] [stdout] 5fde90c3c2e516dd13b00189df73322eeb36d660758c2382272531a16c1b0b3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+7dabc88a3b6768751847baeb49983f31ac5f20e2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c03edb65e299e585a0f52dc3f2a587d28110ac562e7c504c363f8dd386d6cc8
[INFO] running `Command { std: "docker" "start" "-a" "0c03edb65e299e585a0f52dc3f2a587d28110ac562e7c504c363f8dd386d6cc8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.76
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]     Checking zerocopy v0.7.35
[INFO] [stderr]     Checking ppv-lite86 v0.2.20
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking jasn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `EnvRef`, `Environment`, and `native_functions::NativeFunctions`
[INFO] [stdout]  --> src/lib.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 |     environment::{EnvRef, Environment},
[INFO] [stdout]   |                   ^^^^^^  ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 5 |     native_functions::NativeFunctions,
[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: `process`
[INFO] [stdout]   --> src/lib.rs:10:68
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::{cell::RefCell, fs::File, io, io::prelude::*, path::Path, process, rc::Rc};
[INFO] [stdout]    |                                                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `statements::Stmt`
[INFO] [stdout]  --> src/callable.rs:6:2
[INFO] [stdout]   |
[INFO] [stdout] 6 |     statements::Stmt,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `native_functions::*`
[INFO] [stdout]  --> src/environment.rs:3:2
[INFO] [stdout]   |
[INFO] [stdout] 3 |     native_functions::*,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash::Hash`
[INFO] [stdout]  --> src/environment.rs:6:48
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{cell::RefCell, collections::HashMap, hash::Hash, rc::Rc};
[INFO] [stdout]   |                                                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TokenType`
[INFO] [stdout]  --> src/error_handler.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::token::{LiteralType, Token, TokenType};
[INFO] [stdout]   |                                        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `NativeFunction` and `callable`
[INFO] [stdout]  --> src/interpreter.rs:2:2
[INFO] [stdout]   |
[INFO] [stdout] 2 |     callable,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 3 |     callable::{Callable, JasnClass, JasnFunction, NativeFunction},
[INFO] [stdout]   |                                                   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `EnvRef`, `Environment`, and `native_functions::NativeFunctions`
[INFO] [stdout]  --> src/lib.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 |     environment::{EnvRef, Environment},
[INFO] [stdout]   |                   ^^^^^^  ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 5 |     native_functions::NativeFunctions,
[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: `process`
[INFO] [stdout]   --> src/lib.rs:10:68
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::{cell::RefCell, fs::File, io, io::prelude::*, path::Path, process, rc::Rc};
[INFO] [stdout]    |                                                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `statements::Stmt`
[INFO] [stdout]  --> src/callable.rs:6:2
[INFO] [stdout]   |
[INFO] [stdout] 6 |     statements::Stmt,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `native_functions::*`
[INFO] [stdout]  --> src/environment.rs:3:2
[INFO] [stdout]   |
[INFO] [stdout] 3 |     native_functions::*,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hash::Hash`
[INFO] [stdout]  --> src/environment.rs:6:48
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::{cell::RefCell, collections::HashMap, hash::Hash, rc::Rc};
[INFO] [stdout]   |                                                ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TokenType`
[INFO] [stdout]  --> src/error_handler.rs:1:40
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::token::{LiteralType, Token, TokenType};
[INFO] [stdout]   |                                        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `NativeFunction` and `callable`
[INFO] [stdout]  --> src/interpreter.rs:2:2
[INFO] [stdout]   |
[INFO] [stdout] 2 |     callable,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 3 |     callable::{Callable, JasnClass, JasnFunction, NativeFunction},
[INFO] [stdout]   |                                                   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/callable.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |                 let mut environment = function.closure.clone();
[INFO] [stdout]     |                     ----^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `instance`
[INFO] [stdout]    --> src/callable.rs:122:23
[INFO] [stdout]     |
[INFO] [stdout] 122 |             Callable::Instance(instance) => {
[INFO] [stdout]     |                                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_instance`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `native_function`
[INFO] [stdout]    --> src/callable.rs:141:29
[INFO] [stdout]     |
[INFO] [stdout] 141 |             Callable::NativeFunction(native_function) => "<fn native>".to_string(),
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_native_function`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `literal`
[INFO] [stdout]   --> src/error_handler.rs:62:18
[INFO] [stdout]    |
[INFO] [stdout] 62 |             Error::Return(literal) => {
[INFO] [stdout]    |                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_literal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `super_`
[INFO] [stdout]    --> src/interpreter.rs:409:28
[INFO] [stdout]     |
[INFO] [stdout] 409 |     fn visit_super(&mut self, super_: &Super) -> Result<Self::Value, Error> {
[INFO] [stdout]     |                               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_super_`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `this`
[INFO] [stdout]    --> src/interpreter.rs:413:27
[INFO] [stdout]     |
[INFO] [stdout] 413 |     fn visit_this(&mut self, this: &This) -> Result<Self::Value, Error> {
[INFO] [stdout]     |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_this`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/parser.rs:298:30
[INFO] [stdout]     |
[INFO] [stdout] 298 |             } else if let Expr::Index(index) = &expr {
[INFO] [stdout]     |                                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/callable.rs:101:9
[INFO] [stdout]     |
[INFO] [stdout] 101 |                 let mut environment = function.closure.clone();
[INFO] [stdout]     |                     ----^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `instance`
[INFO] [stdout]    --> src/callable.rs:122:23
[INFO] [stdout]     |
[INFO] [stdout] 122 |             Callable::Instance(instance) => {
[INFO] [stdout]     |                                ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_instance`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `native_function`
[INFO] [stdout]    --> src/callable.rs:141:29
[INFO] [stdout]     |
[INFO] [stdout] 141 |             Callable::NativeFunction(native_function) => "<fn native>".to_string(),
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_native_function`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `literal`
[INFO] [stdout]   --> src/error_handler.rs:62:18
[INFO] [stdout]    |
[INFO] [stdout] 62 |             Error::Return(literal) => {
[INFO] [stdout]    |                           ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_literal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `super_`
[INFO] [stdout]    --> src/resolver.rs:264:28
[INFO] [stdout]     |
[INFO] [stdout] 264 |     fn visit_super(&mut self, super_: &Super) -> Result<Self::Value, Error> {
[INFO] [stdout]     |                               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_super_`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `this`
[INFO] [stdout]    --> src/resolver.rs:268:27
[INFO] [stdout]     |
[INFO] [stdout] 268 |     fn visit_this(&mut self, this: &This) -> Result<Self::Value, Error> {
[INFO] [stdout]     |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_this`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `super_`
[INFO] [stdout]    --> src/interpreter.rs:409:28
[INFO] [stdout]     |
[INFO] [stdout] 409 |     fn visit_super(&mut self, super_: &Super) -> Result<Self::Value, Error> {
[INFO] [stdout]     |                               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_super_`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `this`
[INFO] [stdout]    --> src/interpreter.rs:413:27
[INFO] [stdout]     |
[INFO] [stdout] 413 |     fn visit_this(&mut self, this: &This) -> Result<Self::Value, Error> {
[INFO] [stdout]     |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_this`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Unknown` is never constructed
[INFO] [stdout]   --> src/error_handler.rs:12:2
[INFO] [stdout]    |
[INFO] [stdout]  5 | pub enum Error {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 12 |     Unknown,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `AssignIndex`, `Super`, and `This` are never constructed
[INFO] [stdout]   --> src/expressions.rs:36:2
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub enum Expr {
[INFO] [stdout]    |          ---- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 36 |     AssignIndex(Box<AssignIndex>),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     Super(Super),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 40 |     This(This),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expr` 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 pointer comparisons do not produce meaningful results since their addresses are not guaranteed to be unique
[INFO] [stdout]   --> src/callable.rs:32:2
[INFO] [stdout]    |
[INFO] [stdout] 29 | #[derive(Debug, PartialEq, Clone)]
[INFO] [stdout]    |                 --------- in this derive macro expansion
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub function: fn(&mut Interpreter, Vec<LiteralType>) -> Result<LiteralType, Error>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the address of the same function can vary between different codegen units
[INFO] [stdout]    = note: furthermore, different functions could have the same address after being merged together
[INFO] [stdout]    = note: for more information visit <https://doc.rust-lang.org/nightly/core/ptr/fn.fn_addr_eq.html>
[INFO] [stdout]    = note: `#[warn(unpredictable_function_pointer_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/resolver.rs:24:16
[INFO] [stdout]    |
[INFO] [stdout] 24 |         interpreter: &mut Interpreter,
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] 25 |         error_handler: Rc<RefCell<ErrorHandler>>,
[INFO] [stdout] 26 |     ) -> Resolver {
[INFO] [stdout]    |          ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 26 |     ) -> Resolver<'_> {
[INFO] [stdout]    |                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/parser.rs:298:30
[INFO] [stdout]     |
[INFO] [stdout] 298 |             } else if let Expr::Index(index) = &expr {
[INFO] [stdout]     |                                       ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `super_`
[INFO] [stdout]    --> src/resolver.rs:264:28
[INFO] [stdout]     |
[INFO] [stdout] 264 |     fn visit_super(&mut self, super_: &Super) -> Result<Self::Value, Error> {
[INFO] [stdout]     |                               ^^^^^^ help: if this is intentional, prefix it with an underscore: `_super_`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `this`
[INFO] [stdout]    --> src/resolver.rs:268:27
[INFO] [stdout]     |
[INFO] [stdout] 268 |     fn visit_this(&mut self, this: &This) -> Result<Self::Value, Error> {
[INFO] [stdout]     |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_this`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Unknown` is never constructed
[INFO] [stdout]   --> src/error_handler.rs:12:2
[INFO] [stdout]    |
[INFO] [stdout]  5 | pub enum Error {
[INFO] [stdout]    |          ----- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 12 |     Unknown,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Error` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `AssignIndex`, `Super`, and `This` are never constructed
[INFO] [stdout]   --> src/expressions.rs:36:2
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub enum Expr {
[INFO] [stdout]    |          ---- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 36 |     AssignIndex(Box<AssignIndex>),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |     Super(Super),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 40 |     This(This),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expr` 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 pointer comparisons do not produce meaningful results since their addresses are not guaranteed to be unique
[INFO] [stdout]   --> src/callable.rs:32:2
[INFO] [stdout]    |
[INFO] [stdout] 29 | #[derive(Debug, PartialEq, Clone)]
[INFO] [stdout]    |                 --------- in this derive macro expansion
[INFO] [stdout] ...
[INFO] [stdout] 32 |     pub function: fn(&mut Interpreter, Vec<LiteralType>) -> Result<LiteralType, Error>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the address of the same function can vary between different codegen units
[INFO] [stdout]    = note: furthermore, different functions could have the same address after being merged together
[INFO] [stdout]    = note: for more information visit <https://doc.rust-lang.org/nightly/core/ptr/fn.fn_addr_eq.html>
[INFO] [stdout]    = note: `#[warn(unpredictable_function_pointer_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/resolver.rs:24:16
[INFO] [stdout]    |
[INFO] [stdout] 24 |         interpreter: &mut Interpreter,
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^ the lifetime is elided here
[INFO] [stdout] 25 |         error_handler: Rc<RefCell<ErrorHandler>>,
[INFO] [stdout] 26 |     ) -> Resolver {
[INFO] [stdout]    |          ^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 26 |     ) -> Resolver<'_> {
[INFO] [stdout]    |                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.32s
[INFO] running `Command { std: "docker" "inspect" "0c03edb65e299e585a0f52dc3f2a587d28110ac562e7c504c363f8dd386d6cc8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c03edb65e299e585a0f52dc3f2a587d28110ac562e7c504c363f8dd386d6cc8", kill_on_drop: false }`
[INFO] [stdout] 0c03edb65e299e585a0f52dc3f2a587d28110ac562e7c504c363f8dd386d6cc8
