[INFO] cloning repository https://github.com/adrianhelvik/funlang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/adrianhelvik/funlang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadrianhelvik%2Ffunlang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadrianhelvik%2Ffunlang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 076cbb6a1eeb945582d5849ac3c9061672b95c94
[INFO] linting adrianhelvik/funlang against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fadrianhelvik%2Ffunlang" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/adrianhelvik/funlang
[INFO] finished tweaking git repo https://github.com/adrianhelvik/funlang
[INFO] tweaked toml for git repo https://github.com/adrianhelvik/funlang written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/adrianhelvik/funlang on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/adrianhelvik/funlang 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" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded resolve-path v0.1.0
[INFO] [stderr]   Downloaded darrentsung_debug_parser v0.3.1
[INFO] [stderr]   Downloaded colorful v0.2.2
[INFO] [stderr]   Downloaded pretty_assertions_sorted v1.2.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f666ed52e80eeea04e95d6fb194f39a324812f6a8c8eebc817ccac6d1e7788c7
[INFO] running `Command { std: "docker" "start" "-a" "f666ed52e80eeea04e95d6fb194f39a324812f6a8c8eebc817ccac6d1e7788c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f666ed52e80eeea04e95d6fb194f39a324812f6a8c8eebc817ccac6d1e7788c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f666ed52e80eeea04e95d6fb194f39a324812f6a8c8eebc817ccac6d1e7788c7", kill_on_drop: false }`
[INFO] [stdout] f666ed52e80eeea04e95d6fb194f39a324812f6a8c8eebc817ccac6d1e7788c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e6464ec47cd5853ed8f19b745031af4901e30667342ffc389c987322953a59f
[INFO] running `Command { std: "docker" "start" "-a" "2e6464ec47cd5853ed8f19b745031af4901e30667342ffc389c987322953a59f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.168
[INFO] [stderr]     Checking utf8-width v0.1.6
[INFO] [stderr]     Checking bytes v1.9.0
[INFO] [stderr]     Checking colorful v0.2.2
[INFO] [stderr]     Checking unescape v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]     Checking pretty_assertions v1.4.1
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking html-escape v0.2.13
[INFO] [stderr]     Checking http v1.2.0
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking dirs v4.0.0
[INFO] [stderr]     Checking resolve-path v0.1.0
[INFO] [stderr]     Checking fun v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking ordered-float v2.10.0
[INFO] [stderr]     Checking darrentsung_debug_parser v0.3.1
[INFO] [stdout] warning: associated function `from` is never used
[INFO] [stdout]    --> src/parser.rs:155:12
[INFO] [stdout]     |
[INFO] [stdout] 147 | impl State {
[INFO] [stdout]     | ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 155 |     pub fn from(tokens: &Tokens) -> Self {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `args.get(0)`
[INFO] [stdout]   --> src/builtins.rs:58:19
[INFO] [stdout]    |
[INFO] [stdout] 58 |       let mut sum = args
[INFO] [stdout]    |  ___________________^
[INFO] [stdout] 59 | |         .get(0)
[INFO] [stdout]    | |_______________^ help: try: `args.first()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout]    = note: `#[warn(clippy::get_first)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `args`
[INFO] [stdout]   --> src/builtins.rs:63:14
[INFO] [stdout]    |
[INFO] [stdout] 63 |     for i in 1..args.len() {
[INFO] [stdout]    |              ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout]    = note: `#[warn(clippy::needless_range_loop)]` on by default
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 63 -     for i in 1..args.len() {
[INFO] [stdout] 63 +     for <item> in args.iter().skip(1) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `args.get(0)`
[INFO] [stdout]   --> src/builtins.rs:76:19
[INFO] [stdout]    |
[INFO] [stdout] 76 |       let mut sum = args
[INFO] [stdout]    |  ___________________^
[INFO] [stdout] 77 | |         .get(0)
[INFO] [stdout]    | |_______________^ help: try: `args.first()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `args`
[INFO] [stdout]   --> src/builtins.rs:81:14
[INFO] [stdout]    |
[INFO] [stdout] 81 |     for i in 1..args.len() {
[INFO] [stdout]    |              ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 81 -     for i in 1..args.len() {
[INFO] [stdout] 81 +     for <item> in args.iter().skip(1) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/builtins.rs:145:16
[INFO] [stdout]     |
[INFO] [stdout] 145 |             if !(first <= second) {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^ help: try: `(first > second)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/builtins.rs:135:8
[INFO] [stdout]     |
[INFO] [stdout] 135 |     if values.len() > 0 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!values.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout]     = note: `#[warn(clippy::len_zero)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `values`
[INFO] [stdout]    --> src/builtins.rs:140:18
[INFO] [stdout]     |
[INFO] [stdout] 140 |         for i in 1..values.len() {
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]     |
[INFO] [stdout] 140 -         for i in 1..values.len() {
[INFO] [stdout] 140 +         for <item> in values.iter().skip(1) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/builtins.rs:171:16
[INFO] [stdout]     |
[INFO] [stdout] 171 |             if !(first < second) {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^ help: try: `(first >= second)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/builtins.rs:161:8
[INFO] [stdout]     |
[INFO] [stdout] 161 |     if values.len() > 0 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!values.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `values`
[INFO] [stdout]    --> src/builtins.rs:166:18
[INFO] [stdout]     |
[INFO] [stdout] 166 |         for i in 1..values.len() {
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]     |
[INFO] [stdout] 166 -         for i in 1..values.len() {
[INFO] [stdout] 166 +         for <item> in values.iter().skip(1) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/builtins.rs:197:16
[INFO] [stdout]     |
[INFO] [stdout] 197 |             if !(first >= second) {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^ help: try: `(first < second)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/builtins.rs:187:8
[INFO] [stdout]     |
[INFO] [stdout] 187 |     if values.len() > 0 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!values.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `values`
[INFO] [stdout]    --> src/builtins.rs:192:18
[INFO] [stdout]     |
[INFO] [stdout] 192 |         for i in 1..values.len() {
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]     |
[INFO] [stdout] 192 -         for i in 1..values.len() {
[INFO] [stdout] 192 +         for <item> in values.iter().skip(1) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/builtins.rs:223:16
[INFO] [stdout]     |
[INFO] [stdout] 223 |             if !(first > second) {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^ help: try: `(first <= second)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/builtins.rs:213:8
[INFO] [stdout]     |
[INFO] [stdout] 213 |     if values.len() > 0 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!values.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `values`
[INFO] [stdout]    --> src/builtins.rs:218:18
[INFO] [stdout]     |
[INFO] [stdout] 218 |         for i in 1..values.len() {
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]     |
[INFO] [stdout] 218 -         for i in 1..values.len() {
[INFO] [stdout] 218 +         for <item> in values.iter().skip(1) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/builtins.rs:285:5
[INFO] [stdout]     |
[INFO] [stdout] 285 |     return Ok(func_call.expr(Expression::Bool(false)));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]     = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 285 -     return Ok(func_call.expr(Expression::Bool(false)));
[INFO] [stdout] 285 +     Ok(func_call.expr(Expression::Bool(false)))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to one
[INFO] [stdout]    --> src/builtins.rs:273:8
[INFO] [stdout]     |
[INFO] [stdout] 273 |     if expressions.len() < 1 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `expressions.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/builtins.rs:306:5
[INFO] [stdout]     |
[INFO] [stdout] 306 |     return Ok(func_call.expr(Expression::Bool(true)));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 306 -     return Ok(func_call.expr(Expression::Bool(true)));
[INFO] [stdout] 306 +     Ok(func_call.expr(Expression::Bool(true)))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to one
[INFO] [stdout]    --> src/builtins.rs:294:8
[INFO] [stdout]     |
[INFO] [stdout] 294 |     if expressions.len() < 1 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `expressions.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/builtins.rs:326:5
[INFO] [stdout]     |
[INFO] [stdout] 326 |     return Ok(func_call.expr(Expression::Int(first % second)));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 326 -     return Ok(func_call.expr(Expression::Int(first % second)));
[INFO] [stdout] 326 +     Ok(func_call.expr(Expression::Int(first % second)))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/builtins.rs:368:38
[INFO] [stdout]     |
[INFO] [stdout] 368 |     if let Expression::List(list) = &(*func_call.this).expr {
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^ help: try: `func_call.this`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout]     = note: `#[warn(clippy::explicit_auto_deref)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/builtins.rs:378:8
[INFO] [stdout]     |
[INFO] [stdout] 378 |     if args.len() == 0 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `args.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/builtins.rs:386:38
[INFO] [stdout]     |
[INFO] [stdout] 386 |     if let Expression::List(list) = &(*func_call.this).expr {
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^ help: try: `func_call.this`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:112:66
[INFO] [stdout]     |
[INFO] [stdout] 112 |         Expression::FuncExpr(func_expr) => call_func(&func_expr, &func_call, ctx, ctx),
[INFO] [stdout]     |                                                                  ^^^^^^^^^^ help: change this to: `func_call`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]     = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `chars.get(0)`
[INFO] [stdout]    --> src/interpreter.rs:255:27
[INFO] [stdout]     |
[INFO] [stdout] 255 |         if let Some(ch) = chars.get(0) {
[INFO] [stdout]     |                           ^^^^^^^^^^^^ help: try: `chars.first()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:292:42
[INFO] [stdout]     |
[INFO] [stdout] 292 |             let value = remote_scope.get(&ident).map_err(|_| {
[INFO] [stdout]     |                                          ^^^^^^ help: change this to: `ident`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:353:9
[INFO] [stdout]     |
[INFO] [stdout] 353 |         return expr_list_debug_str("\n", &self.expressions);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 353 -         return expr_list_debug_str("\n", &self.expressions);
[INFO] [stdout] 353 +         expr_list_debug_str("\n", &self.expressions)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
[INFO] [stdout]    --> src/interpreter.rs:374:54
[INFO] [stdout]     |
[INFO] [stdout] 374 | fn expr_list_debug_str(delimiter: &str, expressions: &Vec<LocExpr>) -> String {
[INFO] [stdout]     |                                                      ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stdout]     = note: `#[warn(clippy::ptr_arg)]` on by default
[INFO] [stdout] help: change this to
[INFO] [stdout]     |
[INFO] [stdout] 374 - fn expr_list_debug_str(delimiter: &str, expressions: &Vec<LocExpr>) -> String {
[INFO] [stdout] 374 + fn expr_list_debug_str(delimiter: &str, expressions: &[LocExpr]) -> String {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: match expression looks like `matches!` macro
[INFO] [stdout]    --> src/interpreter.rs:383:9
[INFO] [stdout]     |
[INFO] [stdout] 383 | /         match self.expr {
[INFO] [stdout] 384 | |             Expression::Touple(_) => true,
[INFO] [stdout] 385 | |             _ => false,
[INFO] [stdout] 386 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_like_matches_macro
[INFO] [stdout]     = note: `#[warn(clippy::match_like_matches_macro)]` on by default
[INFO] [stdout] help: use `matches!` directly
[INFO] [stdout]     |
[INFO] [stdout] 383 -         match self.expr {
[INFO] [stdout] 384 -             Expression::Touple(_) => true,
[INFO] [stdout] 385 -             _ => false,
[INFO] [stdout] 386 -         }
[INFO] [stdout] 383 +         matches!(self.expr, Expression::Touple(_))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `i64` which implements the `Copy` trait
[INFO] [stdout]    --> src/interpreter.rs:408:40
[INFO] [stdout]     |
[INFO] [stdout] 408 |             Expression::Int(int) => Ok(int.clone()),
[INFO] [stdout]     |                                        ^^^^^^^^^^^ help: try dereferencing it: `*int`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout]     = note: `#[warn(clippy::clone_on_copy)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:560:17
[INFO] [stdout]     |
[INFO] [stdout] 560 |                 return Ok(last);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 560 -                 return Ok(last);
[INFO] [stdout] 560 +                 Ok(last)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:577:17
[INFO] [stdout]     |
[INFO] [stdout] 577 |                 return Ok(last);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 577 -                 return Ok(last);
[INFO] [stdout] 577 +                 Ok(last)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:591:17
[INFO] [stdout]     |
[INFO] [stdout] 591 |                 return Ok(self.loc.wrap(Expression::Return(Box::new(inner))));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 591 -                 return Ok(self.loc.wrap(Expression::Return(Box::new(inner))));
[INFO] [stdout] 591 +                 Ok(self.loc.wrap(Expression::Return(Box::new(inner))))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:510:40
[INFO] [stdout]     |
[INFO] [stdout] 510 |                     ctx.scope.reassign(&var, reassignment.expr.eval(ctx)?)
[INFO] [stdout]     |                                        ^^^^ help: change this to: `var`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enclosing `Ok` and `?` operator are unneeded
[INFO] [stdout]    --> src/interpreter.rs:516:28
[INFO] [stdout]     |
[INFO] [stdout] 516 |                     return Ok(value[0].clone().eval(ctx)?);
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_question_mark
[INFO] [stdout]     = note: `#[warn(clippy::needless_question_mark)]` on by default
[INFO] [stdout] help: remove the enclosing `Ok` and `?` operator
[INFO] [stdout]     |
[INFO] [stdout] 516 -                     return Ok(value[0].clone().eval(ctx)?);
[INFO] [stdout] 516 +                     return value[0].clone().eval(ctx);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:531:31
[INFO] [stdout]     |
[INFO] [stdout] 531 |                 ctx.scope.get(&var)
[INFO] [stdout]     |                               ^^^^ help: change this to: `var`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:557:54
[INFO] [stdout]     |
[INFO] [stdout] 557 |                     last = eval_expr_list(&self.loc, &body, &child_ctx)?;
[INFO] [stdout]     |                                                      ^^^^^ help: change this to: `body`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:574:54
[INFO] [stdout]     |
[INFO] [stdout] 574 |                     last = eval_expr_list(&self.loc, &body, &child_ctx)?;
[INFO] [stdout]     |                                                      ^^^^^ help: change this to: `body`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:584:55
[INFO] [stdout]     |
[INFO] [stdout] 584 |                     eval_expr_and_call_returned_block(&else_expr, ctx)
[INFO] [stdout]     |                                                       ^^^^^^^^^^ help: change this to: `else_expr`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `bool` which implements the `Copy` trait
[INFO] [stdout]    --> src/interpreter.rs:593:74
[INFO] [stdout]     |
[INFO] [stdout] 593 |             Expression::Bool(value) => Ok(self.loc.wrap(Expression::Bool(value.clone()))),
[INFO] [stdout]     |                                                                          ^^^^^^^^^^^^^ help: try dereferencing it: `*value`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:637:56
[INFO] [stdout]     |
[INFO] [stdout] 637 |             Expression::Variable(var) => ctx.scope.get(&var)?.as_string(ctx),
[INFO] [stdout]     |                                                        ^^^^ help: change this to: `var`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `bool` which implements the `Copy` trait
[INFO] [stdout]    --> src/interpreter.rs:652:43
[INFO] [stdout]     |
[INFO] [stdout] 652 |             Expression::Bool(value) => Ok(value.clone()),
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^ help: try removing the `clone` call: `value`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:690:9
[INFO] [stdout]     |
[INFO] [stdout] 690 |         return Ok(format!("[{}]", join(", ", stringified_items)));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 690 -         return Ok(format!("[{}]", join(", ", stringified_items)));
[INFO] [stdout] 690 +         Ok(format!("[{}]", join(", ", stringified_items)))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
[INFO] [stdout]    --> src/interpreter.rs:694:42
[INFO] [stdout]     |
[INFO] [stdout] 694 | fn expressions_to_debug_str(expressions: &Vec<LocExpr>) -> String {
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stdout] help: change this to
[INFO] [stdout]     |
[INFO] [stdout] 694 - fn expressions_to_debug_str(expressions: &Vec<LocExpr>) -> String {
[INFO] [stdout] 694 + fn expressions_to_debug_str(expressions: &[LocExpr]) -> String {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this call to `as_ref` does nothing
[INFO] [stdout]    --> src/interpreter.rs:700:15
[INFO] [stdout]     |
[INFO] [stdout] 700 |         match key.as_ref() {
[INFO] [stdout]     |               ^^^^^^^^^^^^ help: try: `key`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_asref
[INFO] [stdout]     = note: `#[warn(clippy::useless_asref)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:767:17
[INFO] [stdout]     |
[INFO] [stdout] 767 | /                 return format!(
[INFO] [stdout] 768 | |                     "from \"{}\" import {}",
[INFO] [stdout] 769 | |                     import_expr.path,
[INFO] [stdout] 770 | |                     join(", ", imported)
[INFO] [stdout] 771 | |                 );
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 767 ~                 format!(
[INFO] [stdout] 768 +                     "from \"{}\" import {}",
[INFO] [stdout] 769 +                     import_expr.path,
[INFO] [stdout] 770 +                     join(", ", imported)
[INFO] [stdout] 771 ~                 )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:828:17
[INFO] [stdout]     |
[INFO] [stdout] 828 | /                 return format!(
[INFO] [stdout] 829 | |                     "{{\n{}\n}}",
[INFO] [stdout] 830 | |                     closure
[INFO] [stdout] 831 | |                         .func_expr
[INFO] [stdout] ...   |
[INFO] [stdout] 835 | |                         .fold(String::new(), |a, b| format!("{}\n{}", a, b))
[INFO] [stdout] 836 | |                 );
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 828 ~                 format!(
[INFO] [stdout] 829 +                     "{{\n{}\n}}",
[INFO] [stdout] 830 +                     closure
[INFO] [stdout] 831 +                         .func_expr
[INFO] [stdout] 832 +                         .expressions
[INFO] [stdout] 833 +                         .iter()
[INFO] [stdout] 834 +                         .map(|it| it.debug_str())
[INFO] [stdout] 835 +                         .fold(String::new(), |a, b| format!("{}\n{}", a, b))
[INFO] [stdout] 836 ~                 )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:840:21
[INFO] [stdout]     |
[INFO] [stdout] 840 | /                     return format!(
[INFO] [stdout] 841 | |                         "if {} {} else {}",
[INFO] [stdout] 842 | |                         if_expr.condition.debug_str(),
[INFO] [stdout] 843 | |                         if_expr.then_expr.debug_str(),
[INFO] [stdout] 844 | |                         else_expr.debug_str()
[INFO] [stdout] 845 | |                     );
[INFO] [stdout]     | |_____________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 840 ~                     format!(
[INFO] [stdout] 841 +                         "if {} {} else {}",
[INFO] [stdout] 842 +                         if_expr.condition.debug_str(),
[INFO] [stdout] 843 +                         if_expr.then_expr.debug_str(),
[INFO] [stdout] 844 +                         else_expr.debug_str()
[INFO] [stdout] 845 ~                     )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:847:21
[INFO] [stdout]     |
[INFO] [stdout] 847 | /                     return format!(
[INFO] [stdout] 848 | |                         "if {} {}",
[INFO] [stdout] 849 | |                         if_expr.condition.debug_str(),
[INFO] [stdout] 850 | |                         if_expr.then_expr.debug_str()
[INFO] [stdout] 851 | |                     );
[INFO] [stdout]     | |_____________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 847 ~                     format!(
[INFO] [stdout] 848 +                         "if {} {}",
[INFO] [stdout] 849 +                         if_expr.condition.debug_str(),
[INFO] [stdout] 850 +                         if_expr.then_expr.debug_str()
[INFO] [stdout] 851 ~                     )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:802:58
[INFO] [stdout]     |
[INFO] [stdout] 802 |                 format!("({})", expressions_to_debug_str(&expressions))
[INFO] [stdout]     |                                                          ^^^^^^^^^^^^ help: change this to: `expressions`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you are using an explicit closure for cloning elements
[INFO] [stdout]    --> src/interpreter.rs:818:43
[INFO] [stdout]     |
[INFO] [stdout] 818 |                 let args_str = join(", ", func_expr.args.iter().map(|it| it.clone()).collect());
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `cloned` method: `func_expr.args.iter().cloned()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stdout]     = note: `#[warn(clippy::map_clone)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:867:25
[INFO] [stdout]     |
[INFO] [stdout] 867 |                         return format!("{} = {}", k, v.debug_str());
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 867 -                         return format!("{} = {}", k, v.debug_str());
[INFO] [stdout] 867 +                         format!("{} = {}", k, v.debug_str())
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `Scope`
[INFO] [stdout]   --> src/scope.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | /     pub fn new() -> Self {
[INFO] [stdout] 13 | |         Scope {
[INFO] [stdout] 14 | |             values: Box::new(RefCell::new(HashMap::new())),
[INFO] [stdout] 15 | |             parent: None,
[INFO] [stdout] 16 | |         }
[INFO] [stdout] 17 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout]    = note: `#[warn(clippy::new_without_default)]` on by default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout] 11 + impl Default for Scope {
[INFO] [stdout] 12 +     fn default() -> Self {
[INFO] [stdout] 13 +         Self::new()
[INFO] [stdout] 14 +     }
[INFO] [stdout] 15 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/scope.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |             return Ok(expr);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 71 -             return Ok(expr);
[INFO] [stdout] 71 +             Ok(expr)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/lexer.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |         if self.word.len() == 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.word.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `usize` which implements the `Copy` trait
[INFO] [stdout]   --> src/lexer.rs:31:26
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 Loc::new(self.line.clone(), self.column.clone()),
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.line`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `usize` which implements the `Copy` trait
[INFO] [stdout]   --> src/lexer.rs:31:45
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 Loc::new(self.line.clone(), self.column.clone()),
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.column`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to use `.enumerate()` and immediately discard the index
[INFO] [stdout]   --> src/lexer.rs:52:43
[INFO] [stdout]    |
[INFO] [stdout] 52 |         for (_i, c) in self.source.chars().enumerate() {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_enumerate_index
[INFO] [stdout]    = note: `#[warn(clippy::unused_enumerate_index)]` on by default
[INFO] [stdout] help: remove the `.enumerate()` call
[INFO] [stdout]    |
[INFO] [stdout] 52 -         for (_i, c) in self.source.chars().enumerate() {
[INFO] [stdout] 52 +         for c in self.source.chars() {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:107:5
[INFO] [stdout]     |
[INFO] [stdout] 107 |     return Err(None);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 107 -     return Err(None);
[INFO] [stdout] 107 +     Err(None)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:198:9
[INFO] [stdout]     |
[INFO] [stdout] 198 | /         return Ok((
[INFO] [stdout] 199 | |             first,
[INFO] [stdout] 200 | |             State {
[INFO] [stdout] 201 | |                 tokens,
[INFO] [stdout] ...   |
[INFO] [stdout] 204 | |             },
[INFO] [stdout] 205 | |         ));
[INFO] [stdout]     | |__________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 198 ~         Ok((
[INFO] [stdout] 199 +             first,
[INFO] [stdout] 200 +             State {
[INFO] [stdout] 201 +                 tokens,
[INFO] [stdout] 202 +                 final_loc: self.final_loc.clone(),
[INFO] [stdout] 203 +                 is_in_block_arg: self.is_in_block_arg,
[INFO] [stdout] 204 +             },
[INFO] [stdout] 205 ~         ))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/parser.rs:192:12
[INFO] [stdout]     |
[INFO] [stdout] 192 |         if self.tokens.len() == 0 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.tokens.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `self.tokens.get(0)`
[INFO] [stdout]    --> src/parser.rs:211:24
[INFO] [stdout]     |
[INFO] [stdout] 211 |             loc: match self.tokens.get(0) {
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^ help: try: `self.tokens.first()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:219:9
[INFO] [stdout]     |
[INFO] [stdout] 219 | /         return match self.tokens.first() {
[INFO] [stdout] 220 | |             Some(token) => token.value == expected,
[INFO] [stdout] 221 | |             None => false,
[INFO] [stdout] 222 | |         };
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 219 ~         match self.tokens.first() {
[INFO] [stdout] 220 +             Some(token) => token.value == expected,
[INFO] [stdout] 221 +             None => false,
[INFO] [stdout] 222 ~         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `self.tokens.get(0)`
[INFO] [stdout]    --> src/parser.rs:242:9
[INFO] [stdout]     |
[INFO] [stdout] 242 |         self.tokens.get(0).map(|t| t.loc.clone())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^ help: try: `self.tokens.first()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/parser.rs:313:42
[INFO] [stdout]     |
[INFO] [stdout] 313 |     let (let_token, state) = pick("let", &state)?;
[INFO] [stdout]     |                                          ^^^^^^ help: change this to: `state`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/parser.rs:408:52
[INFO] [stdout]     |
[INFO] [stdout] 408 |     let (start_expr, state) = parse_block_arg_expr(&state)?;
[INFO] [stdout]     |                                                    ^^^^^^ help: change this to: `state`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:438:5
[INFO] [stdout]     |
[INFO] [stdout] 438 |     return Ok((for_kw.loc.wrap(Expression::ForExpr(for_expr)), state));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 438 -     return Ok((for_kw.loc.wrap(Expression::ForExpr(for_expr)), state));
[INFO] [stdout] 438 +     Ok((for_kw.loc.wrap(Expression::ForExpr(for_expr)), state))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/parser.rs:421:39
[INFO] [stdout]     |
[INFO] [stdout] 421 |     let (for_kw, state) = pick("for", &state)?;
[INFO] [stdout]     |                                       ^^^^^^ help: change this to: `state`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/parser.rs:442:37
[INFO] [stdout]     |
[INFO] [stdout] 442 |     let (kw, state) = pick("while", &state)?;
[INFO] [stdout]     |                                     ^^^^^^ help: change this to: `state`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:635:5
[INFO] [stdout]     |
[INFO] [stdout] 635 |     return true;
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 635 -     return true;
[INFO] [stdout] 635 +     true
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `token.value.chars().collect::<Vec<char>>().get(0)`
[INFO] [stdout]    --> src/parser.rs:642:31
[INFO] [stdout]     |
[INFO] [stdout] 642 |     if let Some(first_char) = token.value.chars().collect::<Vec<char>>().get(0) {
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `token.value.chars().collect::<Vec<char>>().first()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: match expression looks like `matches!` macro
[INFO] [stdout]    --> src/parser.rs:647:5
[INFO] [stdout]     |
[INFO] [stdout] 647 | /     match token.value.as_ref() {
[INFO] [stdout] 648 | |         "\n" | "(" | ")" | "{" | "}" | "[" | "]" | "," | ".." | "=" | "." => false,
[INFO] [stdout] 649 | |         _ => true,
[INFO] [stdout] 650 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_like_matches_macro
[INFO] [stdout] help: use `matches!` directly
[INFO] [stdout]     |
[INFO] [stdout] 647 -     match token.value.as_ref() {
[INFO] [stdout] 648 -         "\n" | "(" | ")" | "{" | "}" | "[" | "]" | "," | ".." | "=" | "." => false,
[INFO] [stdout] 649 -         _ => true,
[INFO] [stdout] 650 -     }
[INFO] [stdout] 647 +     !matches!(token.value.as_ref(), "\n" | "(" | ")" | "{" | "}" | "[" | "]" | "," | ".." | "=" | ".")
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting integer literal to `i64` is unnecessary
[INFO] [stdout]    --> src/parser.rs:676:28
[INFO] [stdout]     |
[INFO] [stdout] 676 |             sum += digit * (10 as i64).pow(exponent);
[INFO] [stdout]     |                            ^^^^^^^^^^^ help: try: `10_i64`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
[INFO] [stdout]     = note: `#[warn(clippy::unnecessary_cast)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:804:5
[INFO] [stdout]     |
[INFO] [stdout] 804 | /     return Ok((
[INFO] [stdout] 805 | |         LocExpr {
[INFO] [stdout] 806 | |             loc: var.loc.clone(),
[INFO] [stdout] 807 | |             expr: Expression::Variable(var),
[INFO] [stdout] 808 | |         },
[INFO] [stdout] 809 | |         state,
[INFO] [stdout] 810 | |     ));
[INFO] [stdout]     | |______^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 804 ~     Ok((
[INFO] [stdout] 805 +         LocExpr {
[INFO] [stdout] 806 +             loc: var.loc.clone(),
[INFO] [stdout] 807 +             expr: Expression::Variable(var),
[INFO] [stdout] 808 +         },
[INFO] [stdout] 809 +         state,
[INFO] [stdout] 810 ~     ))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:823:5
[INFO] [stdout]     |
[INFO] [stdout] 823 | /     return Ok((
[INFO] [stdout] 824 | |         LocExpr {
[INFO] [stdout] 825 | |             expr,
[INFO] [stdout] 826 | |             loc: opening_bracket.loc.clone(),
[INFO] [stdout] 827 | |         },
[INFO] [stdout] 828 | |         state,
[INFO] [stdout] 829 | |     ));
[INFO] [stdout]     | |______^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 823 ~     Ok((
[INFO] [stdout] 824 +         LocExpr {
[INFO] [stdout] 825 +             expr,
[INFO] [stdout] 826 +             loc: opening_bracket.loc.clone(),
[INFO] [stdout] 827 +         },
[INFO] [stdout] 828 +         state,
[INFO] [stdout] 829 ~     ))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:909:5
[INFO] [stdout]     |
[INFO] [stdout] 909 |     return Ok((vars, state));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 909 -     return Ok((vars, state));
[INFO] [stdout] 909 +     Ok((vars, state))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/types.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 | /         return FuncCall {
[INFO] [stdout] 28 | |             target: self.target.clone(),
[INFO] [stdout] 29 | |             arg: self.arg.clone(),
[INFO] [stdout] 30 | |             this: Box::new(this),
[INFO] [stdout] 31 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 27 ~         FuncCall {
[INFO] [stdout] 28 +             target: self.target.clone(),
[INFO] [stdout] 29 +             arg: self.arg.clone(),
[INFO] [stdout] 30 +             this: Box::new(this),
[INFO] [stdout] 31 +         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `format!`
[INFO] [stdout]    --> src/types.rs:385:25
[INFO] [stdout]     |
[INFO] [stdout] 385 |         message_line += format!("{}", format!("^ [{}:{}] ", err.loc.line, err.loc.column)).as_str();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `format!("^ [{}:{}] ", err.loc.line, err.loc.column).to_string()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stdout]     = note: `#[warn(clippy::useless_format)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `format!` in `format!` args
[INFO] [stdout]    --> src/types.rs:385:25
[INFO] [stdout]     |
[INFO] [stdout] 385 |         message_line += format!("{}", format!("^ [{}:{}] ", err.loc.line, err.loc.column)).as_str();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: combine the `format!(..)` arguments with the outer `format!(..)` call
[INFO] [stdout]     = help: or consider changing `format!` to `format_args!`
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#format_in_format_args
[INFO] [stdout]     = note: `#[warn(clippy::format_in_format_args)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `values.get(0)`
[INFO] [stdout]  --> src/util.rs:8:22
[INFO] [stdout]   |
[INFO] [stdout] 8 |     if let Some(s) = values.get(0) {
[INFO] [stdout]   |                      ^^^^^^^^^^^^^ help: try: `values.first()`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/util.rs:12:29
[INFO] [stdout]    |
[INFO] [stdout] 12 |             result.push_str(&s);
[INFO] [stdout]    |                             ^^ help: change this to: `s`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `std::vec::Vec<types::LocExpr>`
[INFO] [stdout]   --> src/main.rs:31:30
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 expressions: program.expressions.into(),
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `program.expressions`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
[INFO] [stdout]    = note: `#[warn(clippy::useless_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the borrowed expression implements the required traits
[INFO] [stdout]   --> src/main.rs:90:47
[INFO] [stdout]    |
[INFO] [stdout] 90 |             let contents = fs::read_to_string(&filename).expect("Failed to read file");
[INFO] [stdout]    |                                               ^^^^^^^^^ help: change this to: `filename`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrows_for_generic_args)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/main.rs:92:38
[INFO] [stdout]    |
[INFO] [stdout] 92 |             eval_or_panic(&contents, &filename);
[INFO] [stdout]    |                                      ^^^^^^^^^ help: change this to: `filename`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking pretty_assertions_sorted v1.2.3
[INFO] [stdout] warning: function `it_optimizes_tail_calls` is never used
[INFO] [stdout]    --> src/main.rs:931:8
[INFO] [stdout]     |
[INFO] [stdout] 931 |     fn it_optimizes_tail_calls() {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `you_can_check_if_something_has_a_key_using_in` is never used
[INFO] [stdout]     --> src/main.rs:1228:8
[INFO] [stdout]      |
[INFO] [stdout] 1228 |     fn you_can_check_if_something_has_a_key_using_in() {
[INFO] [stdout]      |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `it_can_do_for_in_list` is never used
[INFO] [stdout]    --> src/main.rs:854:12
[INFO] [stdout]     |
[INFO] [stdout] 854 |         fn it_can_do_for_in_list() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `args.get(0)`
[INFO] [stdout]   --> src/builtins.rs:58:19
[INFO] [stdout]    |
[INFO] [stdout] 58 |       let mut sum = args
[INFO] [stdout]    |  ___________________^
[INFO] [stdout] 59 | |         .get(0)
[INFO] [stdout]    | |_______________^ help: try: `args.first()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout]    = note: `#[warn(clippy::get_first)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `args`
[INFO] [stdout]   --> src/builtins.rs:63:14
[INFO] [stdout]    |
[INFO] [stdout] 63 |     for i in 1..args.len() {
[INFO] [stdout]    |              ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout]    = note: `#[warn(clippy::needless_range_loop)]` on by default
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 63 -     for i in 1..args.len() {
[INFO] [stdout] 63 +     for <item> in args.iter().skip(1) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `args.get(0)`
[INFO] [stdout]   --> src/builtins.rs:76:19
[INFO] [stdout]    |
[INFO] [stdout] 76 |       let mut sum = args
[INFO] [stdout]    |  ___________________^
[INFO] [stdout] 77 | |         .get(0)
[INFO] [stdout]    | |_______________^ help: try: `args.first()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `args`
[INFO] [stdout]   --> src/builtins.rs:81:14
[INFO] [stdout]    |
[INFO] [stdout] 81 |     for i in 1..args.len() {
[INFO] [stdout]    |              ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 81 -     for i in 1..args.len() {
[INFO] [stdout] 81 +     for <item> in args.iter().skip(1) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/builtins.rs:145:16
[INFO] [stdout]     |
[INFO] [stdout] 145 |             if !(first <= second) {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^ help: try: `(first > second)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/builtins.rs:135:8
[INFO] [stdout]     |
[INFO] [stdout] 135 |     if values.len() > 0 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!values.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout]     = note: `#[warn(clippy::len_zero)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `values`
[INFO] [stdout]    --> src/builtins.rs:140:18
[INFO] [stdout]     |
[INFO] [stdout] 140 |         for i in 1..values.len() {
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]     |
[INFO] [stdout] 140 -         for i in 1..values.len() {
[INFO] [stdout] 140 +         for <item> in values.iter().skip(1) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/builtins.rs:171:16
[INFO] [stdout]     |
[INFO] [stdout] 171 |             if !(first < second) {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^ help: try: `(first >= second)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/builtins.rs:161:8
[INFO] [stdout]     |
[INFO] [stdout] 161 |     if values.len() > 0 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!values.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `values`
[INFO] [stdout]    --> src/builtins.rs:166:18
[INFO] [stdout]     |
[INFO] [stdout] 166 |         for i in 1..values.len() {
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]     |
[INFO] [stdout] 166 -         for i in 1..values.len() {
[INFO] [stdout] 166 +         for <item> in values.iter().skip(1) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/builtins.rs:197:16
[INFO] [stdout]     |
[INFO] [stdout] 197 |             if !(first >= second) {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^^ help: try: `(first < second)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/builtins.rs:187:8
[INFO] [stdout]     |
[INFO] [stdout] 187 |     if values.len() > 0 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!values.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `values`
[INFO] [stdout]    --> src/builtins.rs:192:18
[INFO] [stdout]     |
[INFO] [stdout] 192 |         for i in 1..values.len() {
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]     |
[INFO] [stdout] 192 -         for i in 1..values.len() {
[INFO] [stdout] 192 +         for <item> in values.iter().skip(1) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/builtins.rs:223:16
[INFO] [stdout]     |
[INFO] [stdout] 223 |             if !(first > second) {
[INFO] [stdout]     |                ^^^^^^^^^^^^^^^^^ help: try: `(first <= second)`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/builtins.rs:213:8
[INFO] [stdout]     |
[INFO] [stdout] 213 |     if values.len() > 0 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!values.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `values`
[INFO] [stdout]    --> src/builtins.rs:218:18
[INFO] [stdout]     |
[INFO] [stdout] 218 |         for i in 1..values.len() {
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]     |
[INFO] [stdout] 218 -         for i in 1..values.len() {
[INFO] [stdout] 218 +         for <item> in values.iter().skip(1) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/builtins.rs:285:5
[INFO] [stdout]     |
[INFO] [stdout] 285 |     return Ok(func_call.expr(Expression::Bool(false)));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]     = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 285 -     return Ok(func_call.expr(Expression::Bool(false)));
[INFO] [stdout] 285 +     Ok(func_call.expr(Expression::Bool(false)))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to one
[INFO] [stdout]    --> src/builtins.rs:273:8
[INFO] [stdout]     |
[INFO] [stdout] 273 |     if expressions.len() < 1 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `expressions.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/builtins.rs:306:5
[INFO] [stdout]     |
[INFO] [stdout] 306 |     return Ok(func_call.expr(Expression::Bool(true)));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 306 -     return Ok(func_call.expr(Expression::Bool(true)));
[INFO] [stdout] 306 +     Ok(func_call.expr(Expression::Bool(true)))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to one
[INFO] [stdout]    --> src/builtins.rs:294:8
[INFO] [stdout]     |
[INFO] [stdout] 294 |     if expressions.len() < 1 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `expressions.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/builtins.rs:326:5
[INFO] [stdout]     |
[INFO] [stdout] 326 |     return Ok(func_call.expr(Expression::Int(first % second)));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 326 -     return Ok(func_call.expr(Expression::Int(first % second)));
[INFO] [stdout] 326 +     Ok(func_call.expr(Expression::Int(first % second)))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/builtins.rs:368:38
[INFO] [stdout]     |
[INFO] [stdout] 368 |     if let Expression::List(list) = &(*func_call.this).expr {
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^ help: try: `func_call.this`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout]     = note: `#[warn(clippy::explicit_auto_deref)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/builtins.rs:378:8
[INFO] [stdout]     |
[INFO] [stdout] 378 |     if args.len() == 0 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `args.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/builtins.rs:386:38
[INFO] [stdout]     |
[INFO] [stdout] 386 |     if let Expression::List(list) = &(*func_call.this).expr {
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^^ help: try: `func_call.this`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_auto_deref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: items after a test module
[INFO] [stdout]    --> src/interpreter.rs:202:1
[INFO] [stdout]     |
[INFO] [stdout] 202 | mod tests {
[INFO] [stdout]     | ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 251 | impl ImportExpr {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 347 | impl Program {
[INFO] [stdout]     | ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 357 | impl Identifier {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 374 | fn expr_list_debug_str(delimiter: &str, expressions: &Vec<LocExpr>) -> String {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 381 | impl LocExpr {
[INFO] [stdout]     | ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 669 | impl List {
[INFO] [stdout]     | ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 694 | fn expressions_to_debug_str(expressions: &Vec<LocExpr>) -> String {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 698 | impl List {
[INFO] [stdout]     | ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 716 | impl Access {
[INFO] [stdout]     | ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 722 | impl Expression {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#items_after_test_module
[INFO] [stdout]     = note: `#[warn(clippy::items_after_test_module)]` on by default
[INFO] [stdout]     = help: move the items to before the test module was defined
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:112:66
[INFO] [stdout]     |
[INFO] [stdout] 112 |         Expression::FuncExpr(func_expr) => call_func(&func_expr, &func_call, ctx, ctx),
[INFO] [stdout]     |                                                                  ^^^^^^^^^^ help: change this to: `func_call`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]     = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:218:9
[INFO] [stdout]     |
[INFO] [stdout] 218 |         return String::from_utf8(output).unwrap();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 218 -         return String::from_utf8(output).unwrap();
[INFO] [stdout] 218 +         String::from_utf8(output).unwrap()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `chars.get(0)`
[INFO] [stdout]    --> src/interpreter.rs:255:27
[INFO] [stdout]     |
[INFO] [stdout] 255 |         if let Some(ch) = chars.get(0) {
[INFO] [stdout]     |                           ^^^^^^^^^^^^ help: try: `chars.first()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:292:42
[INFO] [stdout]     |
[INFO] [stdout] 292 |             let value = remote_scope.get(&ident).map_err(|_| {
[INFO] [stdout]     |                                          ^^^^^^ help: change this to: `ident`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:353:9
[INFO] [stdout]     |
[INFO] [stdout] 353 |         return expr_list_debug_str("\n", &self.expressions);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 353 -         return expr_list_debug_str("\n", &self.expressions);
[INFO] [stdout] 353 +         expr_list_debug_str("\n", &self.expressions)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
[INFO] [stdout]    --> src/interpreter.rs:374:54
[INFO] [stdout]     |
[INFO] [stdout] 374 | fn expr_list_debug_str(delimiter: &str, expressions: &Vec<LocExpr>) -> String {
[INFO] [stdout]     |                                                      ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stdout]     = note: `#[warn(clippy::ptr_arg)]` on by default
[INFO] [stdout] help: change this to
[INFO] [stdout]     |
[INFO] [stdout] 374 - fn expr_list_debug_str(delimiter: &str, expressions: &Vec<LocExpr>) -> String {
[INFO] [stdout] 374 + fn expr_list_debug_str(delimiter: &str, expressions: &[LocExpr]) -> String {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: match expression looks like `matches!` macro
[INFO] [stdout]    --> src/interpreter.rs:383:9
[INFO] [stdout]     |
[INFO] [stdout] 383 | /         match self.expr {
[INFO] [stdout] 384 | |             Expression::Touple(_) => true,
[INFO] [stdout] 385 | |             _ => false,
[INFO] [stdout] 386 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_like_matches_macro
[INFO] [stdout]     = note: `#[warn(clippy::match_like_matches_macro)]` on by default
[INFO] [stdout] help: use `matches!` directly
[INFO] [stdout]     |
[INFO] [stdout] 383 -         match self.expr {
[INFO] [stdout] 384 -             Expression::Touple(_) => true,
[INFO] [stdout] 385 -             _ => false,
[INFO] [stdout] 386 -         }
[INFO] [stdout] 383 +         matches!(self.expr, Expression::Touple(_))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `i64` which implements the `Copy` trait
[INFO] [stdout]    --> src/interpreter.rs:408:40
[INFO] [stdout]     |
[INFO] [stdout] 408 |             Expression::Int(int) => Ok(int.clone()),
[INFO] [stdout]     |                                        ^^^^^^^^^^^ help: try dereferencing it: `*int`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout]     = note: `#[warn(clippy::clone_on_copy)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:560:17
[INFO] [stdout]     |
[INFO] [stdout] 560 |                 return Ok(last);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 560 -                 return Ok(last);
[INFO] [stdout] 560 +                 Ok(last)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:577:17
[INFO] [stdout]     |
[INFO] [stdout] 577 |                 return Ok(last);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 577 -                 return Ok(last);
[INFO] [stdout] 577 +                 Ok(last)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:591:17
[INFO] [stdout]     |
[INFO] [stdout] 591 |                 return Ok(self.loc.wrap(Expression::Return(Box::new(inner))));
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 591 -                 return Ok(self.loc.wrap(Expression::Return(Box::new(inner))));
[INFO] [stdout] 591 +                 Ok(self.loc.wrap(Expression::Return(Box::new(inner))))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:510:40
[INFO] [stdout]     |
[INFO] [stdout] 510 |                     ctx.scope.reassign(&var, reassignment.expr.eval(ctx)?)
[INFO] [stdout]     |                                        ^^^^ help: change this to: `var`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enclosing `Ok` and `?` operator are unneeded
[INFO] [stdout]    --> src/interpreter.rs:516:28
[INFO] [stdout]     |
[INFO] [stdout] 516 |                     return Ok(value[0].clone().eval(ctx)?);
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_question_mark
[INFO] [stdout]     = note: `#[warn(clippy::needless_question_mark)]` on by default
[INFO] [stdout] help: remove the enclosing `Ok` and `?` operator
[INFO] [stdout]     |
[INFO] [stdout] 516 -                     return Ok(value[0].clone().eval(ctx)?);
[INFO] [stdout] 516 +                     return value[0].clone().eval(ctx);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:531:31
[INFO] [stdout]     |
[INFO] [stdout] 531 |                 ctx.scope.get(&var)
[INFO] [stdout]     |                               ^^^^ help: change this to: `var`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:557:54
[INFO] [stdout]     |
[INFO] [stdout] 557 |                     last = eval_expr_list(&self.loc, &body, &child_ctx)?;
[INFO] [stdout]     |                                                      ^^^^^ help: change this to: `body`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:574:54
[INFO] [stdout]     |
[INFO] [stdout] 574 |                     last = eval_expr_list(&self.loc, &body, &child_ctx)?;
[INFO] [stdout]     |                                                      ^^^^^ help: change this to: `body`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:584:55
[INFO] [stdout]     |
[INFO] [stdout] 584 |                     eval_expr_and_call_returned_block(&else_expr, ctx)
[INFO] [stdout]     |                                                       ^^^^^^^^^^ help: change this to: `else_expr`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `bool` which implements the `Copy` trait
[INFO] [stdout]    --> src/interpreter.rs:593:74
[INFO] [stdout]     |
[INFO] [stdout] 593 |             Expression::Bool(value) => Ok(self.loc.wrap(Expression::Bool(value.clone()))),
[INFO] [stdout]     |                                                                          ^^^^^^^^^^^^^ help: try dereferencing it: `*value`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:637:56
[INFO] [stdout]     |
[INFO] [stdout] 637 |             Expression::Variable(var) => ctx.scope.get(&var)?.as_string(ctx),
[INFO] [stdout]     |                                                        ^^^^ help: change this to: `var`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `bool` which implements the `Copy` trait
[INFO] [stdout]    --> src/interpreter.rs:652:43
[INFO] [stdout]     |
[INFO] [stdout] 652 |             Expression::Bool(value) => Ok(value.clone()),
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^ help: try removing the `clone` call: `value`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:690:9
[INFO] [stdout]     |
[INFO] [stdout] 690 |         return Ok(format!("[{}]", join(", ", stringified_items)));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 690 -         return Ok(format!("[{}]", join(", ", stringified_items)));
[INFO] [stdout] 690 +         Ok(format!("[{}]", join(", ", stringified_items)))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
[INFO] [stdout]    --> src/interpreter.rs:694:42
[INFO] [stdout]     |
[INFO] [stdout] 694 | fn expressions_to_debug_str(expressions: &Vec<LocExpr>) -> String {
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stdout] help: change this to
[INFO] [stdout]     |
[INFO] [stdout] 694 - fn expressions_to_debug_str(expressions: &Vec<LocExpr>) -> String {
[INFO] [stdout] 694 + fn expressions_to_debug_str(expressions: &[LocExpr]) -> String {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this call to `as_ref` does nothing
[INFO] [stdout]    --> src/interpreter.rs:700:15
[INFO] [stdout]     |
[INFO] [stdout] 700 |         match key.as_ref() {
[INFO] [stdout]     |               ^^^^^^^^^^^^ help: try: `key`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_asref
[INFO] [stdout]     = note: `#[warn(clippy::useless_asref)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:767:17
[INFO] [stdout]     |
[INFO] [stdout] 767 | /                 return format!(
[INFO] [stdout] 768 | |                     "from \"{}\" import {}",
[INFO] [stdout] 769 | |                     import_expr.path,
[INFO] [stdout] 770 | |                     join(", ", imported)
[INFO] [stdout] 771 | |                 );
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 767 ~                 format!(
[INFO] [stdout] 768 +                     "from \"{}\" import {}",
[INFO] [stdout] 769 +                     import_expr.path,
[INFO] [stdout] 770 +                     join(", ", imported)
[INFO] [stdout] 771 ~                 )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:828:17
[INFO] [stdout]     |
[INFO] [stdout] 828 | /                 return format!(
[INFO] [stdout] 829 | |                     "{{\n{}\n}}",
[INFO] [stdout] 830 | |                     closure
[INFO] [stdout] 831 | |                         .func_expr
[INFO] [stdout] ...   |
[INFO] [stdout] 835 | |                         .fold(String::new(), |a, b| format!("{}\n{}", a, b))
[INFO] [stdout] 836 | |                 );
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 828 ~                 format!(
[INFO] [stdout] 829 +                     "{{\n{}\n}}",
[INFO] [stdout] 830 +                     closure
[INFO] [stdout] 831 +                         .func_expr
[INFO] [stdout] 832 +                         .expressions
[INFO] [stdout] 833 +                         .iter()
[INFO] [stdout] 834 +                         .map(|it| it.debug_str())
[INFO] [stdout] 835 +                         .fold(String::new(), |a, b| format!("{}\n{}", a, b))
[INFO] [stdout] 836 ~                 )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:840:21
[INFO] [stdout]     |
[INFO] [stdout] 840 | /                     return format!(
[INFO] [stdout] 841 | |                         "if {} {} else {}",
[INFO] [stdout] 842 | |                         if_expr.condition.debug_str(),
[INFO] [stdout] 843 | |                         if_expr.then_expr.debug_str(),
[INFO] [stdout] 844 | |                         else_expr.debug_str()
[INFO] [stdout] 845 | |                     );
[INFO] [stdout]     | |_____________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 840 ~                     format!(
[INFO] [stdout] 841 +                         "if {} {} else {}",
[INFO] [stdout] 842 +                         if_expr.condition.debug_str(),
[INFO] [stdout] 843 +                         if_expr.then_expr.debug_str(),
[INFO] [stdout] 844 +                         else_expr.debug_str()
[INFO] [stdout] 845 ~                     )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:847:21
[INFO] [stdout]     |
[INFO] [stdout] 847 | /                     return format!(
[INFO] [stdout] 848 | |                         "if {} {}",
[INFO] [stdout] 849 | |                         if_expr.condition.debug_str(),
[INFO] [stdout] 850 | |                         if_expr.then_expr.debug_str()
[INFO] [stdout] 851 | |                     );
[INFO] [stdout]     | |_____________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 847 ~                     format!(
[INFO] [stdout] 848 +                         "if {} {}",
[INFO] [stdout] 849 +                         if_expr.condition.debug_str(),
[INFO] [stdout] 850 +                         if_expr.then_expr.debug_str()
[INFO] [stdout] 851 ~                     )
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/interpreter.rs:802:58
[INFO] [stdout]     |
[INFO] [stdout] 802 |                 format!("({})", expressions_to_debug_str(&expressions))
[INFO] [stdout]     |                                                          ^^^^^^^^^^^^ help: change this to: `expressions`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you are using an explicit closure for cloning elements
[INFO] [stdout]    --> src/interpreter.rs:818:43
[INFO] [stdout]     |
[INFO] [stdout] 818 |                 let args_str = join(", ", func_expr.args.iter().map(|it| it.clone()).collect());
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `cloned` method: `func_expr.args.iter().cloned()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stdout]     = note: `#[warn(clippy::map_clone)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/interpreter.rs:867:25
[INFO] [stdout]     |
[INFO] [stdout] 867 |                         return format!("{} = {}", k, v.debug_str());
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 867 -                         return format!("{} = {}", k, v.debug_str());
[INFO] [stdout] 867 +                         format!("{} = {}", k, v.debug_str())
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `Scope`
[INFO] [stdout]   --> src/scope.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | /     pub fn new() -> Self {
[INFO] [stdout] 13 | |         Scope {
[INFO] [stdout] 14 | |             values: Box::new(RefCell::new(HashMap::new())),
[INFO] [stdout] 15 | |             parent: None,
[INFO] [stdout] 16 | |         }
[INFO] [stdout] 17 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout]    = note: `#[warn(clippy::new_without_default)]` on by default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout] 11 + impl Default for Scope {
[INFO] [stdout] 12 +     fn default() -> Self {
[INFO] [stdout] 13 +         Self::new()
[INFO] [stdout] 14 +     }
[INFO] [stdout] 15 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/scope.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |             return Ok(expr);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 71 -             return Ok(expr);
[INFO] [stdout] 71 +             Ok(expr)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/lexer.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 |         if self.word.len() == 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.word.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `usize` which implements the `Copy` trait
[INFO] [stdout]   --> src/lexer.rs:31:26
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 Loc::new(self.line.clone(), self.column.clone()),
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.line`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `usize` which implements the `Copy` trait
[INFO] [stdout]   --> src/lexer.rs:31:45
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 Loc::new(self.line.clone(), self.column.clone()),
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.column`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to use `.enumerate()` and immediately discard the index
[INFO] [stdout]   --> src/lexer.rs:52:43
[INFO] [stdout]    |
[INFO] [stdout] 52 |         for (_i, c) in self.source.chars().enumerate() {
[INFO] [stdout]    |                                           ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_enumerate_index
[INFO] [stdout]    = note: `#[warn(clippy::unused_enumerate_index)]` on by default
[INFO] [stdout] help: remove the `.enumerate()` call
[INFO] [stdout]    |
[INFO] [stdout] 52 -         for (_i, c) in self.source.chars().enumerate() {
[INFO] [stdout] 52 +         for c in self.source.chars() {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:107:5
[INFO] [stdout]     |
[INFO] [stdout] 107 |     return Err(None);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 107 -     return Err(None);
[INFO] [stdout] 107 +     Err(None)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:198:9
[INFO] [stdout]     |
[INFO] [stdout] 198 | /         return Ok((
[INFO] [stdout] 199 | |             first,
[INFO] [stdout] 200 | |             State {
[INFO] [stdout] 201 | |                 tokens,
[INFO] [stdout] ...   |
[INFO] [stdout] 204 | |             },
[INFO] [stdout] 205 | |         ));
[INFO] [stdout]     | |__________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 198 ~         Ok((
[INFO] [stdout] 199 +             first,
[INFO] [stdout] 200 +             State {
[INFO] [stdout] 201 +                 tokens,
[INFO] [stdout] 202 +                 final_loc: self.final_loc.clone(),
[INFO] [stdout] 203 +                 is_in_block_arg: self.is_in_block_arg,
[INFO] [stdout] 204 +             },
[INFO] [stdout] 205 ~         ))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/parser.rs:192:12
[INFO] [stdout]     |
[INFO] [stdout] 192 |         if self.tokens.len() == 0 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.tokens.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `self.tokens.get(0)`
[INFO] [stdout]    --> src/parser.rs:211:24
[INFO] [stdout]     |
[INFO] [stdout] 211 |             loc: match self.tokens.get(0) {
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^ help: try: `self.tokens.first()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:219:9
[INFO] [stdout]     |
[INFO] [stdout] 219 | /         return match self.tokens.first() {
[INFO] [stdout] 220 | |             Some(token) => token.value == expected,
[INFO] [stdout] 221 | |             None => false,
[INFO] [stdout] 222 | |         };
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 219 ~         match self.tokens.first() {
[INFO] [stdout] 220 +             Some(token) => token.value == expected,
[INFO] [stdout] 221 +             None => false,
[INFO] [stdout] 222 ~         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `self.tokens.get(0)`
[INFO] [stdout]    --> src/parser.rs:242:9
[INFO] [stdout]     |
[INFO] [stdout] 242 |         self.tokens.get(0).map(|t| t.loc.clone())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^ help: try: `self.tokens.first()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/parser.rs:313:42
[INFO] [stdout]     |
[INFO] [stdout] 313 |     let (let_token, state) = pick("let", &state)?;
[INFO] [stdout]     |                                          ^^^^^^ help: change this to: `state`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/parser.rs:408:52
[INFO] [stdout]     |
[INFO] [stdout] 408 |     let (start_expr, state) = parse_block_arg_expr(&state)?;
[INFO] [stdout]     |                                                    ^^^^^^ help: change this to: `state`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:438:5
[INFO] [stdout]     |
[INFO] [stdout] 438 |     return Ok((for_kw.loc.wrap(Expression::ForExpr(for_expr)), state));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 438 -     return Ok((for_kw.loc.wrap(Expression::ForExpr(for_expr)), state));
[INFO] [stdout] 438 +     Ok((for_kw.loc.wrap(Expression::ForExpr(for_expr)), state))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/parser.rs:421:39
[INFO] [stdout]     |
[INFO] [stdout] 421 |     let (for_kw, state) = pick("for", &state)?;
[INFO] [stdout]     |                                       ^^^^^^ help: change this to: `state`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/parser.rs:442:37
[INFO] [stdout]     |
[INFO] [stdout] 442 |     let (kw, state) = pick("while", &state)?;
[INFO] [stdout]     |                                     ^^^^^^ help: change this to: `state`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:635:5
[INFO] [stdout]     |
[INFO] [stdout] 635 |     return true;
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 635 -     return true;
[INFO] [stdout] 635 +     true
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `token.value.chars().collect::<Vec<char>>().get(0)`
[INFO] [stdout]    --> src/parser.rs:642:31
[INFO] [stdout]     |
[INFO] [stdout] 642 |     if let Some(first_char) = token.value.chars().collect::<Vec<char>>().get(0) {
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `token.value.chars().collect::<Vec<char>>().first()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: match expression looks like `matches!` macro
[INFO] [stdout]    --> src/parser.rs:647:5
[INFO] [stdout]     |
[INFO] [stdout] 647 | /     match token.value.as_ref() {
[INFO] [stdout] 648 | |         "\n" | "(" | ")" | "{" | "}" | "[" | "]" | "," | ".." | "=" | "." => false,
[INFO] [stdout] 649 | |         _ => true,
[INFO] [stdout] 650 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_like_matches_macro
[INFO] [stdout] help: use `matches!` directly
[INFO] [stdout]     |
[INFO] [stdout] 647 -     match token.value.as_ref() {
[INFO] [stdout] 648 -         "\n" | "(" | ")" | "{" | "}" | "[" | "]" | "," | ".." | "=" | "." => false,
[INFO] [stdout] 649 -         _ => true,
[INFO] [stdout] 650 -     }
[INFO] [stdout] 647 +     !matches!(token.value.as_ref(), "\n" | "(" | ")" | "{" | "}" | "[" | "]" | "," | ".." | "=" | ".")
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting integer literal to `i64` is unnecessary
[INFO] [stdout]    --> src/parser.rs:676:28
[INFO] [stdout]     |
[INFO] [stdout] 676 |             sum += digit * (10 as i64).pow(exponent);
[INFO] [stdout]     |                            ^^^^^^^^^^^ help: try: `10_i64`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
[INFO] [stdout]     = note: `#[warn(clippy::unnecessary_cast)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:804:5
[INFO] [stdout]     |
[INFO] [stdout] 804 | /     return Ok((
[INFO] [stdout] 805 | |         LocExpr {
[INFO] [stdout] 806 | |             loc: var.loc.clone(),
[INFO] [stdout] 807 | |             expr: Expression::Variable(var),
[INFO] [stdout] 808 | |         },
[INFO] [stdout] 809 | |         state,
[INFO] [stdout] 810 | |     ));
[INFO] [stdout]     | |______^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 804 ~     Ok((
[INFO] [stdout] 805 +         LocExpr {
[INFO] [stdout] 806 +             loc: var.loc.clone(),
[INFO] [stdout] 807 +             expr: Expression::Variable(var),
[INFO] [stdout] 808 +         },
[INFO] [stdout] 809 +         state,
[INFO] [stdout] 810 ~     ))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:823:5
[INFO] [stdout]     |
[INFO] [stdout] 823 | /     return Ok((
[INFO] [stdout] 824 | |         LocExpr {
[INFO] [stdout] 825 | |             expr,
[INFO] [stdout] 826 | |             loc: opening_bracket.loc.clone(),
[INFO] [stdout] 827 | |         },
[INFO] [stdout] 828 | |         state,
[INFO] [stdout] 829 | |     ));
[INFO] [stdout]     | |______^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 823 ~     Ok((
[INFO] [stdout] 824 +         LocExpr {
[INFO] [stdout] 825 +             expr,
[INFO] [stdout] 826 +             loc: opening_bracket.loc.clone(),
[INFO] [stdout] 827 +         },
[INFO] [stdout] 828 +         state,
[INFO] [stdout] 829 ~     ))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/parser.rs:909:5
[INFO] [stdout]     |
[INFO] [stdout] 909 |     return Ok((vars, state));
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 909 -     return Ok((vars, state));
[INFO] [stdout] 909 +     Ok((vars, state))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/types.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 | /         return FuncCall {
[INFO] [stdout] 28 | |             target: self.target.clone(),
[INFO] [stdout] 29 | |             arg: self.arg.clone(),
[INFO] [stdout] 30 | |             this: Box::new(this),
[INFO] [stdout] 31 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 27 ~         FuncCall {
[INFO] [stdout] 28 +             target: self.target.clone(),
[INFO] [stdout] 29 +             arg: self.arg.clone(),
[INFO] [stdout] 30 +             this: Box::new(this),
[INFO] [stdout] 31 +         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `format!`
[INFO] [stdout]    --> src/types.rs:385:25
[INFO] [stdout]     |
[INFO] [stdout] 385 |         message_line += format!("{}", format!("^ [{}:{}] ", err.loc.line, err.loc.column)).as_str();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.to_string()`: `format!("^ [{}:{}] ", err.loc.line, err.loc.column).to_string()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stdout]     = note: `#[warn(clippy::useless_format)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `format!` in `format!` args
[INFO] [stdout]    --> src/types.rs:385:25
[INFO] [stdout]     |
[INFO] [stdout] 385 |         message_line += format!("{}", format!("^ [{}:{}] ", err.loc.line, err.loc.column)).as_str();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: combine the `format!(..)` arguments with the outer `format!(..)` call
[INFO] [stdout]     = help: or consider changing `format!` to `format_args!`
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#format_in_format_args
[INFO] [stdout]     = note: `#[warn(clippy::format_in_format_args)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `values.get(0)`
[INFO] [stdout]  --> src/util.rs:8:22
[INFO] [stdout]   |
[INFO] [stdout] 8 |     if let Some(s) = values.get(0) {
[INFO] [stdout]   |                      ^^^^^^^^^^^^^ help: try: `values.first()`
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/util.rs:12:29
[INFO] [stdout]    |
[INFO] [stdout] 12 |             result.push_str(&s);
[INFO] [stdout]    |                             ^^ help: change this to: `s`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless conversion to the same type: `std::vec::Vec<types::LocExpr>`
[INFO] [stdout]   --> src/main.rs:31:30
[INFO] [stdout]    |
[INFO] [stdout] 31 |                 expressions: program.expressions.into(),
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `program.expressions`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_conversion
[INFO] [stdout]    = note: `#[warn(clippy::useless_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the borrowed expression implements the required traits
[INFO] [stdout]   --> src/main.rs:90:47
[INFO] [stdout]    |
[INFO] [stdout] 90 |             let contents = fs::read_to_string(&filename).expect("Failed to read file");
[INFO] [stdout]    |                                               ^^^^^^^^^ help: change this to: `filename`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrows_for_generic_args
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrows_for_generic_args)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/main.rs:92:38
[INFO] [stdout]    |
[INFO] [stdout] 92 |             eval_or_panic(&contents, &filename);
[INFO] [stdout]    |                                      ^^^^^^^^^ help: change this to: `filename`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: empty string literal in `eprintln!`
[INFO] [stdout]    --> src/main.rs:797:13
[INFO] [stdout]     |
[INFO] [stdout] 797 |             eprintln!("");
[INFO] [stdout]     |             ^^^^^^^^^^--^
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       help: remove the empty string
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stdout]     = note: `#[warn(clippy::println_empty_string)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: empty string literal in `eprintln!`
[INFO] [stdout]    --> src/main.rs:800:13
[INFO] [stdout]     |
[INFO] [stdout] 800 |             eprintln!("");
[INFO] [stdout]     |             ^^^^^^^^^^--^
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       help: remove the empty string
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.44s
[INFO] running `Command { std: "docker" "inspect" "2e6464ec47cd5853ed8f19b745031af4901e30667342ffc389c987322953a59f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e6464ec47cd5853ed8f19b745031af4901e30667342ffc389c987322953a59f", kill_on_drop: false }`
[INFO] [stdout] 2e6464ec47cd5853ed8f19b745031af4901e30667342ffc389c987322953a59f