[INFO] cloning repository https://github.com/cvtsh248/glang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cvtsh248/glang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcvtsh248%2Fglang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcvtsh248%2Fglang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 04091d5b2ab1264ab2a66ed4d510a446ddd9af5c
[INFO] checking cvtsh248/glang against try#ddcf048784667508cd676fef4667f88ae15628a3 for pr-148271
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcvtsh248%2Fglang" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/cvtsh248/glang
[INFO] finished tweaking git repo https://github.com/cvtsh248/glang
[INFO] tweaked toml for git repo https://github.com/cvtsh248/glang written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/cvtsh248/glang on toolchain ddcf048784667508cd676fef4667f88ae15628a3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ddcf048784667508cd676fef4667f88ae15628a3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/cvtsh248/glang 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" "+ddcf048784667508cd676fef4667f88ae15628a3" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking cvtsh248/glang against try#ddcf048784667508cd676fef4667f88ae15628a3 for pr-148271
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcvtsh248%2Fglang" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/cvtsh248/glang
[INFO] finished tweaking git repo https://github.com/cvtsh248/glang
[INFO] tweaked toml for git repo https://github.com/cvtsh248/glang written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/cvtsh248/glang on toolchain ddcf048784667508cd676fef4667f88ae15628a3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ddcf048784667508cd676fef4667f88ae15628a3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/cvtsh248/glang 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" "+ddcf048784667508cd676fef4667f88ae15628a3" "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-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ddcf048784667508cd676fef4667f88ae15628a3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4fd0cb14f071f906bdd60ee0922ca488b4860bae75e47b6a6bea65b4e5468b54
[INFO] running `Command { std: "docker" "start" "-a" "4fd0cb14f071f906bdd60ee0922ca488b4860bae75e47b6a6bea65b4e5468b54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4fd0cb14f071f906bdd60ee0922ca488b4860bae75e47b6a6bea65b4e5468b54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fd0cb14f071f906bdd60ee0922ca488b4860bae75e47b6a6bea65b4e5468b54", kill_on_drop: false }`
[INFO] [stdout] 4fd0cb14f071f906bdd60ee0922ca488b4860bae75e47b6a6bea65b4e5468b54
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ddcf048784667508cd676fef4667f88ae15628a3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75e140b13a86f051ed214cea86f73f3d42819ab42bb9d6d7589154aeee783a27
[INFO] running `Command { std: "docker" "start" "-a" "75e140b13a86f051ed214cea86f73f3d42819ab42bb9d6d7589154aeee783a27", kill_on_drop: false }`
[INFO] [stderr]     Checking glang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::Ref`
[INFO] [stdout]  --> src/lib/eval.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::Ref;
[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: `std::env`
[INFO] [stdout]  --> src/lib/eval.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::Ref`
[INFO] [stdout]  --> src/lib/eval.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::Ref;
[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: `std::env`
[INFO] [stdout]  --> src/lib/eval.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/lexer.rs:159:9
[INFO] [stdout]     |
[INFO] [stdout] 159 |     let mut source_split: Vec<char> = source.chars().collect();
[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: variable `is_string_literal` is assigned to, but never used
[INFO] [stdout]    --> src/lib/lexer.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |         let mut is_string_literal = false;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_is_string_literal` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `is_string_literal` is never read
[INFO] [stdout]    --> src/lib/lexer.rs:342:13
[INFO] [stdout]     |
[INFO] [stdout] 342 |             is_string_literal = true;
[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 `is_string_literal` is never read
[INFO] [stdout]    --> src/lib/lexer.rs:326:13
[INFO] [stdout]     |
[INFO] [stdout] 326 |             is_string_literal = true;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/lexer.rs:159:9
[INFO] [stdout]     |
[INFO] [stdout] 159 |     let mut source_split: Vec<char> = source.chars().collect();
[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: variable `is_string_literal` is assigned to, but never used
[INFO] [stdout]    --> src/lib/lexer.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |         let mut is_string_literal = false;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_is_string_literal` instead
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `is_string_literal` is never read
[INFO] [stdout]    --> src/lib/lexer.rs:342:13
[INFO] [stdout]     |
[INFO] [stdout] 342 |             is_string_literal = true;
[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 `is_string_literal` is never read
[INFO] [stdout]    --> src/lib/lexer.rs:326:13
[INFO] [stdout]     |
[INFO] [stdout] 326 |             is_string_literal = true;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]   --> src/lib/eval.rs:97:17
[INFO] [stdout]    |
[INFO] [stdout] 97 |             let mut rhs: parser::Node;
[INFO] [stdout]    |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]   --> src/lib/eval.rs:97:17
[INFO] [stdout]    |
[INFO] [stdout] 97 |             let mut rhs: parser::Node;
[INFO] [stdout]    |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/eval.rs:747:17
[INFO] [stdout]     |
[INFO] [stdout] 747 | ...   let mut new_env = Rc::new(RefCell::new(environment::Environment {parent: Some(env.clone()), variables: vec![], functions: vec![]})); 
[INFO] [stdout]     |           ----^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/eval.rs:769:21
[INFO] [stdout]     |
[INFO] [stdout] 769 | ...   let mut new_env = Rc::new(RefCell::new(environment::Environment {parent: Some(env.clone()), variables: vec![], functions: vec![]})); 
[INFO] [stdout]     |           ----^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/eval.rs:785:21
[INFO] [stdout]     |
[INFO] [stdout] 785 | ...   let mut new_env = Rc::new(RefCell::new(environment::Environment {parent: Some(env.clone()), variables: vec![], functions: vec![]})); 
[INFO] [stdout]     |           ----^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/eval.rs:799:21
[INFO] [stdout]     |
[INFO] [stdout] 799 | ...   let mut new_env = Rc::new(RefCell::new(environment::Environment {parent: Some(env.clone()), variables: vec![], functions: vec![]})); 
[INFO] [stdout]     |           ----^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/eval.rs:810:17
[INFO] [stdout]     |
[INFO] [stdout] 810 | ...   let mut new_env = Rc::new(RefCell::new(environment::Environment {parent: Some(env.clone()), variables: vec![], functions: vec![]})); 
[INFO] [stdout]     |           ----^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/eval.rs:835:17
[INFO] [stdout]     |
[INFO] [stdout] 835 | ...   let mut new_env = Rc::new(RefCell::new(environment::Environment {parent: Some(env.clone()), variables: vec![], functions: vec![]})); 
[INFO] [stdout]     |           ----^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/eval.rs:747:17
[INFO] [stdout]     |
[INFO] [stdout] 747 | ...   let mut new_env = Rc::new(RefCell::new(environment::Environment {parent: Some(env.clone()), variables: vec![], functions: vec![]})); 
[INFO] [stdout]     |           ----^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/eval.rs:769:21
[INFO] [stdout]     |
[INFO] [stdout] 769 | ...   let mut new_env = Rc::new(RefCell::new(environment::Environment {parent: Some(env.clone()), variables: vec![], functions: vec![]})); 
[INFO] [stdout]     |           ----^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/eval.rs:785:21
[INFO] [stdout]     |
[INFO] [stdout] 785 | ...   let mut new_env = Rc::new(RefCell::new(environment::Environment {parent: Some(env.clone()), variables: vec![], functions: vec![]})); 
[INFO] [stdout]     |           ----^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/eval.rs:799:21
[INFO] [stdout]     |
[INFO] [stdout] 799 | ...   let mut new_env = Rc::new(RefCell::new(environment::Environment {parent: Some(env.clone()), variables: vec![], functions: vec![]})); 
[INFO] [stdout]     |           ----^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/eval.rs:810:17
[INFO] [stdout]     |
[INFO] [stdout] 810 | ...   let mut new_env = Rc::new(RefCell::new(environment::Environment {parent: Some(env.clone()), variables: vec![], functions: vec![]})); 
[INFO] [stdout]     |           ----^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/eval.rs:835:17
[INFO] [stdout]     |
[INFO] [stdout] 835 | ...   let mut new_env = Rc::new(RefCell::new(environment::Environment {parent: Some(env.clone()), variables: vec![], functions: vec![]})); 
[INFO] [stdout]     |           ----^^^^^^^
[INFO] [stdout]     |           |
[INFO] [stdout]     |           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib/environment.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let mut env_rc = env_r.borrow_mut();
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/environment.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let mut env_rc = env_r.borrow_mut();
[INFO] [stdout]     |         ----^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib/run.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut environment = Rc::new(RefCell::new(environment::Environment {parent: None, variables: vec![], functions: vec![]}));
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `out`
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let out = lib::run::run_script(source.unwrap());
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_out`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib/environment.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let mut env_rc = env_r.borrow_mut();
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Return` is never constructed
[INFO] [stdout]   --> src/lib/lexer.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout]  2 | pub enum TokenType {
[INFO] [stdout]    |          --------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 24 |     Return,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TokenType` 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: method `push` is never used
[INFO] [stdout]    --> src/lib/lexer.rs:115:12
[INFO] [stdout]     |
[INFO] [stdout] 113 | impl TokenStream {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] 114 |     // Last in first out
[INFO] [stdout] 115 |     pub fn push(&mut self, token: Token){
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `push` is never used
[INFO] [stdout]    --> src/lib/lexer.rs:139:12
[INFO] [stdout]     |
[INFO] [stdout] 137 | impl DataStream {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] 138 |     // Last in first out
[INFO] [stdout] 139 |     pub fn push(&mut self, character: char){
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Runtime` is never constructed
[INFO] [stdout]   --> src/lib/eval.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum RuntimeValType {
[INFO] [stdout]    |          -------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 18 |     Runtime
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RuntimeValType` 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 `eval_bool_binary_expr` is never used
[INFO] [stdout]    --> src/lib/eval.rs:624:4
[INFO] [stdout]     |
[INFO] [stdout] 624 | fn eval_bool_binary_expr(left: &RuntimeVal, right: &RuntimeVal, operator: &str) -> RuntimeVal{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib/environment.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let mut env_rc = env_r.borrow_mut();
[INFO] [stdout]     |         ----^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib/run.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut environment = Rc::new(RefCell::new(environment::Environment {parent: None, variables: vec![], functions: vec![]}));
[INFO] [stdout]    |         ----^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `out`
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let out = lib::run::run_script(source.unwrap());
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_out`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Return` is never constructed
[INFO] [stdout]   --> src/lib/lexer.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout]  2 | pub enum TokenType {
[INFO] [stdout]    |          --------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 24 |     Return,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TokenType` 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: method `push` is never used
[INFO] [stdout]    --> src/lib/lexer.rs:115:12
[INFO] [stdout]     |
[INFO] [stdout] 113 | impl TokenStream {
[INFO] [stdout]     | ---------------- method in this implementation
[INFO] [stdout] 114 |     // Last in first out
[INFO] [stdout] 115 |     pub fn push(&mut self, token: Token){
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `push` is never used
[INFO] [stdout]    --> src/lib/lexer.rs:139:12
[INFO] [stdout]     |
[INFO] [stdout] 137 | impl DataStream {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] 138 |     // Last in first out
[INFO] [stdout] 139 |     pub fn push(&mut self, character: char){
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Runtime` is never constructed
[INFO] [stdout]   --> src/lib/eval.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum RuntimeValType {
[INFO] [stdout]    |          -------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 18 |     Runtime
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RuntimeValType` 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 `eval_bool_binary_expr` is never used
[INFO] [stdout]    --> src/lib/eval.rs:624:4
[INFO] [stdout]     |
[INFO] [stdout] 624 | fn eval_bool_binary_expr(left: &RuntimeVal, right: &RuntimeVal, operator: &str) -> RuntimeVal{
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "75e140b13a86f051ed214cea86f73f3d42819ab42bb9d6d7589154aeee783a27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75e140b13a86f051ed214cea86f73f3d42819ab42bb9d6d7589154aeee783a27", kill_on_drop: false }`
[INFO] [stdout] 75e140b13a86f051ed214cea86f73f3d42819ab42bb9d6d7589154aeee783a27