[INFO] cloning repository https://github.com/sagarreddypatil/language
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sagarreddypatil/language" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsagarreddypatil%2Flanguage", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsagarreddypatil%2Flanguage'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 29bd8e578ce0a93f8b5159cd7dbec5e2b3692014
[INFO] linting sagarreddypatil/language against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsagarreddypatil%2Flanguage" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sagarreddypatil/language
[INFO] finished tweaking git repo https://github.com/sagarreddypatil/language
[INFO] tweaked toml for git repo https://github.com/sagarreddypatil/language written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sagarreddypatil/language 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/sagarreddypatil/language 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]  Downloading crates ...
[INFO] [stderr]   Downloaded logos-derive v0.14.2
[INFO] [stderr]   Downloaded logos-codegen v0.14.2
[INFO] [stderr]   Downloaded syn v2.0.58
[INFO] [stderr]   Downloaded logos v0.14.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 28381b237598885ad8252a2dec115db5401a787ebcea5a3351ba805b971ff4b2
[INFO] running `Command { std: "docker" "start" "-a" "28381b237598885ad8252a2dec115db5401a787ebcea5a3351ba805b971ff4b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28381b237598885ad8252a2dec115db5401a787ebcea5a3351ba805b971ff4b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28381b237598885ad8252a2dec115db5401a787ebcea5a3351ba805b971ff4b2", kill_on_drop: false }`
[INFO] [stdout] 28381b237598885ad8252a2dec115db5401a787ebcea5a3351ba805b971ff4b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] a51885fc6d6ec2acd0c3b342551b7105b80f6ae46733635af29b06b0364a2be5
[INFO] running `Command { std: "docker" "start" "-a" "a51885fc6d6ec2acd0c3b342551b7105b80f6ae46733635af29b06b0364a2be5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling beef v0.5.2
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling logos-codegen v0.14.2
[INFO] [stderr]    Compiling phf_macros v0.11.2
[INFO] [stderr]     Checking phf v0.11.2
[INFO] [stderr]    Compiling logos-derive v0.14.2
[INFO] [stderr]     Checking logos v0.14.2
[INFO] [stderr]     Checking language v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ops::Rem`
[INFO] [stdout]  --> src/passes.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, ops::Rem};
[INFO] [stdout]   |                                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/passes.rs:127:17
[INFO] [stdout]     |
[INFO] [stdout] 127 |         "&&" => (args[0] & args[1]),
[INFO] [stdout]     |                 ^                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 127 -         "&&" => (args[0] & args[1]),
[INFO] [stdout] 127 +         "&&" => args[0] & args[1] ,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/passes.rs:128:17
[INFO] [stdout]     |
[INFO] [stdout] 128 |         "||" => (args[0] | args[1]),
[INFO] [stdout]     |                 ^                 ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 128 -         "||" => (args[0] | args[1]),
[INFO] [stdout] 128 +         "||" => args[0] | args[1] ,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ops::Rem`
[INFO] [stdout]  --> src/passes.rs:1:33
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::HashMap, ops::Rem};
[INFO] [stdout]   |                                 ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/passes.rs:127:17
[INFO] [stdout]     |
[INFO] [stdout] 127 |         "&&" => (args[0] & args[1]),
[INFO] [stdout]     |                 ^                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 127 -         "&&" => (args[0] & args[1]),
[INFO] [stdout] 127 +         "&&" => args[0] & args[1] ,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]    --> src/passes.rs:128:17
[INFO] [stdout]     |
[INFO] [stdout] 128 |         "||" => (args[0] | args[1]),
[INFO] [stdout]     |                 ^                 ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 128 -         "||" => (args[0] | args[1]),
[INFO] [stdout] 128 +         "||" => args[0] | args[1] ,
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/checker.rs:312:42
[INFO] [stdout]     |
[INFO] [stdout] 312 |     fn infer_constraints_simp(&mut self, mut env: TyEnv, simp: &Simp) -> (Type, TyConstraints) {
[INFO] [stdout]     |                                          ----^^^
[INFO] [stdout]     |                                          |
[INFO] [stdout]     |                                          help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/checker.rs:312:42
[INFO] [stdout]     |
[INFO] [stdout] 312 |     fn infer_constraints_simp(&mut self, mut env: TyEnv, simp: &Simp) -> (Type, TyConstraints) {
[INFO] [stdout]     |                                          ----^^^
[INFO] [stdout]     |                                          |
[INFO] [stdout]     |                                          help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/ast_to_cps.rs:351:13
[INFO] [stdout]     |
[INFO] [stdout] 351 |             _ => unimplemented!(),
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/ast_to_cps.rs:351:13
[INFO] [stdout]     |
[INFO] [stdout] 265 |             Pattern::Var(name, _) => CpsExpr::Prim {
[INFO] [stdout]     |             --------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 271 |             Pattern::Int(n) => {
[INFO] [stdout]     |             --------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 296 |             Pattern::Bool(b) => {
[INFO] [stdout]     |             ---------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 301 |             Pattern::Data(data_def, tag, pats) => {
[INFO] [stdout]     |             ---------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 351 |             _ => unimplemented!(),
[INFO] [stdout]     |             ^ collectively making this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/ast_to_cps.rs:351:13
[INFO] [stdout]     |
[INFO] [stdout] 351 |             _ => unimplemented!(),
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/ast_to_cps.rs:351:13
[INFO] [stdout]     |
[INFO] [stdout] 265 |             Pattern::Var(name, _) => CpsExpr::Prim {
[INFO] [stdout]     |             --------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 271 |             Pattern::Int(n) => {
[INFO] [stdout]     |             --------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 296 |             Pattern::Bool(b) => {
[INFO] [stdout]     |             ---------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 301 |             Pattern::Data(data_def, tag, pats) => {
[INFO] [stdout]     |             ---------------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 351 |             _ => unimplemented!(),
[INFO] [stdout]     |             ^ collectively making this unreachable
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut pass = Shrinking::new();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TypeDef` is never constructed
[INFO] [stdout]   --> src/ast.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub struct TypeDef {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `insert` are never used
[INFO] [stdout]    --> src/cps.rs:154:12
[INFO] [stdout]     |
[INFO] [stdout] 153 | impl Subst {
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout] 154 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 168 |     pub fn insert(&mut self, key: Name, value: Name) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]    --> src/cps.rs:333:12
[INFO] [stdout]     |
[INFO] [stdout] 317 | impl<Lit> CpsExpr<Lit> {
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 333 |     pub fn free(&self) -> HashSet<Name> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]    --> src/cps.rs:372:12
[INFO] [stdout]     |
[INFO] [stdout] 367 | impl<Lit> CntDef<Lit> {
[INFO] [stdout]     | --------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 372 |     pub fn free(&self) -> HashSet<Name> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]    --> src/cps.rs:382:12
[INFO] [stdout]     |
[INFO] [stdout] 377 | impl<Lit> FunDef<Lit> {
[INFO] [stdout]     | --------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 382 |     pub fn free(&self) -> HashSet<Name> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: name `EOF` contains a capitalized acronym
[INFO] [stdout]   --> src/lexer.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     EOF,
[INFO] [stdout]    |     ^^^ help: consider making the acronym lowercase, except the initial letter (notice the capitalization): `Eof`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms
[INFO] [stdout]    = note: `#[warn(clippy::upper_case_acronyms)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut pass = Shrinking::new();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TypeDef` is never constructed
[INFO] [stdout]   --> src/ast.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 | pub struct TypeDef {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `insert` are never used
[INFO] [stdout]    --> src/cps.rs:154:12
[INFO] [stdout]     |
[INFO] [stdout] 153 | impl Subst {
[INFO] [stdout]     | ---------- associated items in this implementation
[INFO] [stdout] 154 |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 168 |     pub fn insert(&mut self, key: Name, value: Name) {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]    --> src/cps.rs:333:12
[INFO] [stdout]     |
[INFO] [stdout] 317 | impl<Lit> CpsExpr<Lit> {
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 333 |     pub fn free(&self) -> HashSet<Name> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]    --> src/cps.rs:372:12
[INFO] [stdout]     |
[INFO] [stdout] 367 | impl<Lit> CntDef<Lit> {
[INFO] [stdout]     | --------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 372 |     pub fn free(&self) -> HashSet<Name> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `free` is never used
[INFO] [stdout]    --> src/cps.rs:382:12
[INFO] [stdout]     |
[INFO] [stdout] 377 | impl<Lit> FunDef<Lit> {
[INFO] [stdout]     | --------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 382 |     pub fn free(&self) -> HashSet<Name> {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: name `EOF` contains a capitalized acronym
[INFO] [stdout]   --> src/lexer.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     EOF,
[INFO] [stdout]    |     ^^^ help: consider making the acronym lowercase, except the initial letter (notice the capitalization): `Eof`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms
[INFO] [stdout]    = note: `#[warn(clippy::upper_case_acronyms)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: match expression looks like `matches!` macro
[INFO] [stdout]   --> src/parser.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | /         match peek {
[INFO] [stdout] 27 | |             Some(true) => false,
[INFO] [stdout] 28 | |             _ => true,
[INFO] [stdout] 29 | |         }
[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] 26 -         match peek {
[INFO] [stdout] 27 -             Some(true) => false,
[INFO] [stdout] 28 -             _ => true,
[INFO] [stdout] 29 -         }
[INFO] [stdout] 26 +         !matches!(peek, Some(true))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/parser.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let token = token.unwrap().unwrap();
[INFO] [stdout]    |         ------------------------------------ unnecessary `let` binding
[INFO] [stdout] 43 |
[INFO] [stdout] 44 |         token
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout]    = note: `#[warn(clippy::let_and_return)]` on by default
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 42 ~         
[INFO] [stdout] 43 |
[INFO] [stdout] 44 ~         token.unwrap().unwrap()
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `match` for an equality check. Consider using `if`
[INFO] [stdout]    --> src/parser.rs:149:9
[INFO] [stdout]     |
[INFO] [stdout] 149 | /         match self.peek() {
[INFO] [stdout] 150 | |             Token::POpen => {
[INFO] [stdout] 151 | |                 self.accept();
[INFO] [stdout] 152 | |                 pats.push(self.parse_pattern());
[INFO] [stdout] ...   |
[INFO] [stdout] 168 | |             _ => {}
[INFO] [stdout] 169 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stdout]     = note: `#[warn(clippy::single_match)]` on by default
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 149 ~         if self.peek() == &Token::POpen {
[INFO] [stdout] 150 +             self.accept();
[INFO] [stdout] 151 +             pats.push(self.parse_pattern());
[INFO] [stdout] 152 + 
[INFO] [stdout] 153 +             loop {
[INFO] [stdout] 154 +                 match self.peek() {
[INFO] [stdout] 155 +                     Token::Comma => {
[INFO] [stdout] 156 +                         self.accept();
[INFO] [stdout] 157 +                         pats.push(self.parse_pattern());
[INFO] [stdout] 158 +                     }
[INFO] [stdout] 159 +                     Token::PClose => {
[INFO] [stdout] 160 +                         self.accept();
[INFO] [stdout] 161 +                         break;
[INFO] [stdout] 162 +                     }
[INFO] [stdout] 163 +                     _ => panic!("Expected ',' or ')', got {:?}", self.peek()),
[INFO] [stdout] 164 +                 }
[INFO] [stdout] 165 +             }
[INFO] [stdout] 166 +         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: match expression looks like `matches!` macro
[INFO] [stdout]   --> src/parser.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 | /         match peek {
[INFO] [stdout] 27 | |             Some(true) => false,
[INFO] [stdout] 28 | |             _ => true,
[INFO] [stdout] 29 | |         }
[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] 26 -         match peek {
[INFO] [stdout] 27 -             Some(true) => false,
[INFO] [stdout] 28 -             _ => true,
[INFO] [stdout] 29 -         }
[INFO] [stdout] 26 +         !matches!(peek, Some(true))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/parser.rs:230:9
[INFO] [stdout]     |
[INFO] [stdout] 230 | /         loop {
[INFO] [stdout] 231 | |             let name = match self.peek() {
[INFO] [stdout] 232 | |                 Token::Ident(name) => Name(name.clone()),
[INFO] [stdout] 233 | |                 _ => break,
[INFO] [stdout] ...   |
[INFO] [stdout] 246 | |             lhs = Simp::FnCall(fname, vec![lhs, rhs]);
[INFO] [stdout] 247 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout]     = note: `#[warn(clippy::while_let_loop)]` on by default
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 230 ~         while let Token::Ident(name) = self.peek() {
[INFO] [stdout] 231 +             let name = Name(name.clone());
[INFO] [stdout] 232 +             ..
[INFO] [stdout] 233 +         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/parser.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let token = token.unwrap().unwrap();
[INFO] [stdout]    |         ------------------------------------ unnecessary `let` binding
[INFO] [stdout] 43 |
[INFO] [stdout] 44 |         token
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout]    = note: `#[warn(clippy::let_and_return)]` on by default
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 42 ~         
[INFO] [stdout] 43 |
[INFO] [stdout] 44 ~         token.unwrap().unwrap()
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `match` for an equality check. Consider using `if`
[INFO] [stdout]    --> src/parser.rs:319:9
[INFO] [stdout]     |
[INFO] [stdout] 319 | /         match self.peek() {
[INFO] [stdout] 320 | |             Token::POpen => {
[INFO] [stdout] 321 | |                 self.accept();
[INFO] [stdout] 322 | |                 slist.push(self.parse_simp());
[INFO] [stdout] ...   |
[INFO] [stdout] 339 | |             _ => {}
[INFO] [stdout] 340 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 319 ~         if self.peek() == &Token::POpen {
[INFO] [stdout] 320 +             self.accept();
[INFO] [stdout] 321 +             slist.push(self.parse_simp());
[INFO] [stdout] 322 + 
[INFO] [stdout] 323 +             loop {
[INFO] [stdout] 324 +                 let token = self.peek();
[INFO] [stdout] 325 +                 match token {
[INFO] [stdout] 326 +                     Token::Comma => {
[INFO] [stdout] 327 +                         self.accept();
[INFO] [stdout] 328 +                         slist.push(self.parse_simp());
[INFO] [stdout] 329 +                     }
[INFO] [stdout] 330 +                     Token::PClose => {
[INFO] [stdout] 331 +                         self.accept();
[INFO] [stdout] 332 +                         break;
[INFO] [stdout] 333 +                     }
[INFO] [stdout] 334 +                     _ => panic!("Expected ',' or ')', got {:?}", token),
[INFO] [stdout] 335 +                 }
[INFO] [stdout] 336 +             }
[INFO] [stdout] 337 +         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/parser.rs:369:9
[INFO] [stdout]     |
[INFO] [stdout] 369 | /         loop {
[INFO] [stdout] 370 | |             match self.peek() {
[INFO] [stdout] 371 | |                 Token::Pipe => {
[INFO] [stdout] 372 | |                     self.accept();
[INFO] [stdout] ...   |
[INFO] [stdout] 380 | |         }
[INFO] [stdout]     | |_________^ help: try: `while let Token::Pipe = self.peek() { .. }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `match` for an equality check. Consider using `if`
[INFO] [stdout]    --> src/parser.rs:149:9
[INFO] [stdout]     |
[INFO] [stdout] 149 | /         match self.peek() {
[INFO] [stdout] 150 | |             Token::POpen => {
[INFO] [stdout] 151 | |                 self.accept();
[INFO] [stdout] 152 | |                 pats.push(self.parse_pattern());
[INFO] [stdout] ...   |
[INFO] [stdout] 168 | |             _ => {}
[INFO] [stdout] 169 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stdout]     = note: `#[warn(clippy::single_match)]` on by default
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 149 ~         if self.peek() == &Token::POpen {
[INFO] [stdout] 150 +             self.accept();
[INFO] [stdout] 151 +             pats.push(self.parse_pattern());
[INFO] [stdout] 152 + 
[INFO] [stdout] 153 +             loop {
[INFO] [stdout] 154 +                 match self.peek() {
[INFO] [stdout] 155 +                     Token::Comma => {
[INFO] [stdout] 156 +                         self.accept();
[INFO] [stdout] 157 +                         pats.push(self.parse_pattern());
[INFO] [stdout] 158 +                     }
[INFO] [stdout] 159 +                     Token::PClose => {
[INFO] [stdout] 160 +                         self.accept();
[INFO] [stdout] 161 +                         break;
[INFO] [stdout] 162 +                     }
[INFO] [stdout] 163 +                     _ => panic!("Expected ',' or ')', got {:?}", self.peek()),
[INFO] [stdout] 164 +                 }
[INFO] [stdout] 165 +             }
[INFO] [stdout] 166 +         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/parser.rs:382:12
[INFO] [stdout]     |
[INFO] [stdout] 382 |         if cases.len() == 0 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `cases.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: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/parser.rs:399:9
[INFO] [stdout]     |
[INFO] [stdout] 399 | /         loop {
[INFO] [stdout] 400 | |             match self.peek() {
[INFO] [stdout] 401 | |                 Token::Pipe => {
[INFO] [stdout] 402 | |                     self.accept();
[INFO] [stdout] ...   |
[INFO] [stdout] 408 | |         }
[INFO] [stdout]     | |_________^ help: try: `while let Token::Pipe = self.peek() { .. }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/parser.rs:230:9
[INFO] [stdout]     |
[INFO] [stdout] 230 | /         loop {
[INFO] [stdout] 231 | |             let name = match self.peek() {
[INFO] [stdout] 232 | |                 Token::Ident(name) => Name(name.clone()),
[INFO] [stdout] 233 | |                 _ => break,
[INFO] [stdout] ...   |
[INFO] [stdout] 246 | |             lhs = Simp::FnCall(fname, vec![lhs, rhs]);
[INFO] [stdout] 247 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout]     = note: `#[warn(clippy::while_let_loop)]` on by default
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 230 ~         while let Token::Ident(name) = self.peek() {
[INFO] [stdout] 231 +             let name = Name(name.clone());
[INFO] [stdout] 232 +             ..
[INFO] [stdout] 233 +         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]    --> src/parser.rs:447:17
[INFO] [stdout]     |
[INFO] [stdout] 446 |                 let ty = lhs.pop().unwrap();
[INFO] [stdout]     |                 ---------------------------- unnecessary `let` binding
[INFO] [stdout] 447 |                 ty
[INFO] [stdout]     |                 ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]     |
[INFO] [stdout] 446 ~                 
[INFO] [stdout] 447 ~                 lhs.pop().unwrap()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `match` for an equality check. Consider using `if`
[INFO] [stdout]    --> src/parser.rs:319:9
[INFO] [stdout]     |
[INFO] [stdout] 319 | /         match self.peek() {
[INFO] [stdout] 320 | |             Token::POpen => {
[INFO] [stdout] 321 | |                 self.accept();
[INFO] [stdout] 322 | |                 slist.push(self.parse_simp());
[INFO] [stdout] ...   |
[INFO] [stdout] 339 | |             _ => {}
[INFO] [stdout] 340 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stdout] help: try
[INFO] [stdout]     |
[INFO] [stdout] 319 ~         if self.peek() == &Token::POpen {
[INFO] [stdout] 320 +             self.accept();
[INFO] [stdout] 321 +             slist.push(self.parse_simp());
[INFO] [stdout] 322 + 
[INFO] [stdout] 323 +             loop {
[INFO] [stdout] 324 +                 let token = self.peek();
[INFO] [stdout] 325 +                 match token {
[INFO] [stdout] 326 +                     Token::Comma => {
[INFO] [stdout] 327 +                         self.accept();
[INFO] [stdout] 328 +                         slist.push(self.parse_simp());
[INFO] [stdout] 329 +                     }
[INFO] [stdout] 330 +                     Token::PClose => {
[INFO] [stdout] 331 +                         self.accept();
[INFO] [stdout] 332 +                         break;
[INFO] [stdout] 333 +                     }
[INFO] [stdout] 334 +                     _ => panic!("Expected ',' or ')', got {:?}", token),
[INFO] [stdout] 335 +                 }
[INFO] [stdout] 336 +             }
[INFO] [stdout] 337 +         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/parser.rs:369:9
[INFO] [stdout]     |
[INFO] [stdout] 369 | /         loop {
[INFO] [stdout] 370 | |             match self.peek() {
[INFO] [stdout] 371 | |                 Token::Pipe => {
[INFO] [stdout] 372 | |                     self.accept();
[INFO] [stdout] ...   |
[INFO] [stdout] 380 | |         }
[INFO] [stdout]     | |_________^ help: try: `while let Token::Pipe = self.peek() { .. }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]    --> src/parser.rs:382:12
[INFO] [stdout]     |
[INFO] [stdout] 382 |         if cases.len() == 0 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `cases.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: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/parser.rs:399:9
[INFO] [stdout]     |
[INFO] [stdout] 399 | /         loop {
[INFO] [stdout] 400 | |             match self.peek() {
[INFO] [stdout] 401 | |                 Token::Pipe => {
[INFO] [stdout] 402 | |                     self.accept();
[INFO] [stdout] ...   |
[INFO] [stdout] 408 | |         }
[INFO] [stdout]     | |_________^ help: try: `while let Token::Pipe = self.peek() { .. }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]    --> src/parser.rs:447:17
[INFO] [stdout]     |
[INFO] [stdout] 446 |                 let ty = lhs.pop().unwrap();
[INFO] [stdout]     |                 ---------------------------- unnecessary `let` binding
[INFO] [stdout] 447 |                 ty
[INFO] [stdout]     |                 ^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]     |
[INFO] [stdout] 446 ~                 
[INFO] [stdout] 447 ~                 lhs.pop().unwrap()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant redefinition of a binding `new_constraints`
[INFO] [stdout]    --> src/checker.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |             let mut new_constraints = new_constraints;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: `new_constraints` is initially defined here
[INFO] [stdout]    --> src/checker.rs:164:17
[INFO] [stdout]     |
[INFO] [stdout] 164 |             let mut new_constraints = vec![];
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_locals
[INFO] [stdout]     = note: `#[warn(clippy::redundant_locals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant redefinition of a binding `new_constraints`
[INFO] [stdout]    --> src/checker.rs:169:13
[INFO] [stdout]     |
[INFO] [stdout] 169 |             let mut new_constraints = new_constraints;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: `new_constraints` is initially defined here
[INFO] [stdout]    --> src/checker.rs:164:17
[INFO] [stdout]     |
[INFO] [stdout] 164 |             let mut new_constraints = vec![];
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_locals
[INFO] [stdout]     = note: `#[warn(clippy::redundant_locals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: deref which would be done by auto-deref
[INFO] [stdout]    --> src/checker.rs:271:77
[INFO] [stdout]     |
[INFO] [stdout] 271 |                 let (t_fbody, x_fbody) = self.infer_constraints_simp(fnenv, &*f.body);
[INFO] [stdout]     |                                                                             ^^^^^^^^ help: try: `&f.body`
[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: deref which would be done by auto-deref
[INFO] [stdout]    --> src/checker.rs:271:77
[INFO] [stdout]     |
[INFO] [stdout] 271 |                 let (t_fbody, x_fbody) = self.infer_constraints_simp(fnenv, &*f.body);
[INFO] [stdout]     |                                                                             ^^^^^^^^ help: try: `&f.body`
[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: match expression looks like `matches!` macro
[INFO] [stdout]   --> src/ast.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 | /         match self.0.as_str() {
[INFO] [stdout] 22 | |             "+" | "-" | "*" | "/" | "%" | "~" => true,
[INFO] [stdout] 23 | |             "==" | "!=" | "<" | ">" | "<=" | ">=" => true,
[INFO] [stdout] 24 | |             "&&" | "||" => true,
[INFO] [stdout] 25 | |             "!" => true,
[INFO] [stdout] 26 | |             _ => false,
[INFO] [stdout] 27 | |         }
[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] 21 -         match self.0.as_str() {
[INFO] [stdout] 22 -             "+" | "-" | "*" | "/" | "%" | "~" => true,
[INFO] [stdout] 23 -             "==" | "!=" | "<" | ">" | "<=" | ">=" => true,
[INFO] [stdout] 24 -             "&&" | "||" => true,
[INFO] [stdout] 25 -             "!" => true,
[INFO] [stdout] 26 -             _ => false,
[INFO] [stdout] 27 -         }
[INFO] [stdout] 21 +         matches!(self.0.as_str(), "+" | "-" | "*" | "/" | "%" | "~" | "==" | "!=" | "<" | ">" | "<=" | ">=" | "&&" | "||" | "!")
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: match expression looks like `matches!` macro
[INFO] [stdout]   --> src/ast.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 | /         match self.0.as_str() {
[INFO] [stdout] 22 | |             "+" | "-" | "*" | "/" | "%" | "~" => true,
[INFO] [stdout] 23 | |             "==" | "!=" | "<" | ">" | "<=" | ">=" => true,
[INFO] [stdout] 24 | |             "&&" | "||" => true,
[INFO] [stdout] 25 | |             "!" => true,
[INFO] [stdout] 26 | |             _ => false,
[INFO] [stdout] 27 | |         }
[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] 21 -         match self.0.as_str() {
[INFO] [stdout] 22 -             "+" | "-" | "*" | "/" | "%" | "~" => true,
[INFO] [stdout] 23 -             "==" | "!=" | "<" | ">" | "<=" | ">=" => true,
[INFO] [stdout] 24 -             "&&" | "||" => true,
[INFO] [stdout] 25 -             "!" => true,
[INFO] [stdout] 26 -             _ => false,
[INFO] [stdout] 27 -         }
[INFO] [stdout] 21 +         matches!(self.0.as_str(), "+" | "-" | "*" | "/" | "%" | "~" | "==" | "!=" | "<" | ">" | "<=" | ">=" | "&&" | "||" | "!")
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]   --> src/interp.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |         write!(f, "Env {{\n")?;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout]    = note: `#[warn(clippy::write_with_newline)]` on by default
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]    |
[INFO] [stdout] 49 -         write!(f, "Env {{\n")?;
[INFO] [stdout] 49 +         writeln!(f, "Env {{")?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]   --> src/interp.rs:52:32
[INFO] [stdout]    |
[INFO] [stdout] 52 |                 Some(value) => write!(f, "  {}: {},\n", name, value)?,
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]    |
[INFO] [stdout] 52 -                 Some(value) => write!(f, "  {}: {},\n", name, value)?,
[INFO] [stdout] 52 +                 Some(value) => writeln!(f, "  {}: {},", name, value)?,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]   --> src/interp.rs:53:25
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 None => write!(f, "  {}: <hole>,\n", name)?,
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]    |
[INFO] [stdout] 53 -                 None => write!(f, "  {}: <hole>,\n", name)?,
[INFO] [stdout] 53 +                 None => writeln!(f, "  {}: <hole>,", name)?,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]   --> src/interp.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |         write!(f, "Env {{\n")?;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout]    = note: `#[warn(clippy::write_with_newline)]` on by default
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]    |
[INFO] [stdout] 49 -         write!(f, "Env {{\n")?;
[INFO] [stdout] 49 +         writeln!(f, "Env {{")?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]   --> src/interp.rs:52:32
[INFO] [stdout]    |
[INFO] [stdout] 52 |                 Some(value) => write!(f, "  {}: {},\n", name, value)?,
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]    |
[INFO] [stdout] 52 -                 Some(value) => write!(f, "  {}: {},\n", name, value)?,
[INFO] [stdout] 52 +                 Some(value) => writeln!(f, "  {}: {},", name, value)?,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]   --> src/interp.rs:53:25
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 None => write!(f, "  {}: <hole>,\n", name)?,
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]    |
[INFO] [stdout] 53 -                 None => write!(f, "  {}: <hole>,\n", name)?,
[INFO] [stdout] 53 +                 None => writeln!(f, "  {}: <hole>,", name)?,
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
[INFO] [stdout]    --> src/interp.rs:180:24
[INFO] [stdout]     |
[INFO] [stdout] 180 |                 .chain(free_body.into_iter())
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
[INFO] [stdout]    --> /rustc/3645249d79dfb136b5d8de3ce153d19d6698d92d/library/core/src/iter/traits/iterator.rs:510:11
[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] help: consider removing the `.into_iter()`
[INFO] [stdout]     |
[INFO] [stdout] 180 -                 .chain(free_body.into_iter())
[INFO] [stdout] 180 +                 .chain(free_body)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `.into_iter()` call is equivalent to `.iter()` and will not consume the `Vec`
[INFO] [stdout]    --> src/interp.rs:212:34
[INFO] [stdout]     |
[INFO] [stdout] 212 |             let free_arms = arms.into_iter().flat_map(|(pat, body)| {
[INFO] [stdout]     |                                  ^^^^^^^^^ help: call directly: `iter`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stdout]     = note: `#[warn(clippy::into_iter_on_ref)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: explicit call to `.into_iter()` in function argument accepting `IntoIterator`
[INFO] [stdout]    --> src/interp.rs:180:24
[INFO] [stdout]     |
[INFO] [stdout] 180 |                 .chain(free_body.into_iter())
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: this parameter accepts any `IntoIterator`, so you don't need to call `.into_iter()`
[INFO] [stdout]    --> /rustc/3645249d79dfb136b5d8de3ce153d19d6698d92d/library/core/src/iter/traits/iterator.rs:510:11
[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] help: consider removing the `.into_iter()`
[INFO] [stdout]     |
[INFO] [stdout] 180 -                 .chain(free_body.into_iter())
[INFO] [stdout] 180 +                 .chain(free_body)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `.into_iter()` call is equivalent to `.iter()` and will not consume the `Vec`
[INFO] [stdout]    --> src/interp.rs:230:31
[INFO] [stdout]     |
[INFO] [stdout] 230 |         Data(_, args) => args.into_iter().flat_map(free_vars_simp).collect(),
[INFO] [stdout]     |                               ^^^^^^^^^ help: call directly: `iter`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `.into_iter()` call is equivalent to `.iter()` and will not consume the `Vec`
[INFO] [stdout]    --> src/interp.rs:212:34
[INFO] [stdout]     |
[INFO] [stdout] 212 |             let free_arms = arms.into_iter().flat_map(|(pat, body)| {
[INFO] [stdout]     |                                  ^^^^^^^^^ help: call directly: `iter`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stdout]     = note: `#[warn(clippy::into_iter_on_ref)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `.into_iter()` call is equivalent to `.iter()` and will not consume the `Vec`
[INFO] [stdout]    --> src/interp.rs:230:31
[INFO] [stdout]     |
[INFO] [stdout] 230 |         Data(_, args) => args.into_iter().flat_map(free_vars_simp).collect(),
[INFO] [stdout]     |                               ^^^^^^^^^ help: call directly: `iter`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]   --> src/display_impls.rs:95:17
[INFO] [stdout]    |
[INFO] [stdout] 95 |                 write!(f, "{}\n", fn_def)?;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]    |
[INFO] [stdout] 95 -                 write!(f, "{}\n", fn_def)?;
[INFO] [stdout] 95 +                 writeln!(f, "{}", fn_def)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]    --> src/display_impls.rs:108:17
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 write!(f, "match {} {{\n", expr)?;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]     |
[INFO] [stdout] 108 -                 write!(f, "match {} {{\n", expr)?;
[INFO] [stdout] 108 +                 writeln!(f, "match {} {{", expr)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]   --> src/display_impls.rs:95:17
[INFO] [stdout]    |
[INFO] [stdout] 95 |                 write!(f, "{}\n", fn_def)?;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]    |
[INFO] [stdout] 95 -                 write!(f, "{}\n", fn_def)?;
[INFO] [stdout] 95 +                 writeln!(f, "{}", fn_def)?;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]    --> src/display_impls.rs:108:17
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 write!(f, "match {} {{\n", expr)?;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]     |
[INFO] [stdout] 108 -                 write!(f, "match {} {{\n", expr)?;
[INFO] [stdout] 108 +                 writeln!(f, "match {} {{", expr)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]    --> src/display_impls.rs:112:25
[INFO] [stdout]     |
[INFO] [stdout] 112 |                         write!(f, "\n")?;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]     |
[INFO] [stdout] 112 -                         write!(f, "\n")?;
[INFO] [stdout] 112 +                         writeln!(f)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]    --> src/display_impls.rs:112:25
[INFO] [stdout]     |
[INFO] [stdout] 112 |                         write!(f, "\n")?;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]     |
[INFO] [stdout] 112 -                         write!(f, "\n")?;
[INFO] [stdout] 112 +                         writeln!(f)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]    --> src/display_impls.rs:170:13
[INFO] [stdout]     |
[INFO] [stdout] 170 |             write!(f, "{}\n", data_def)?;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]     |
[INFO] [stdout] 170 -             write!(f, "{}\n", data_def)?;
[INFO] [stdout] 170 +             writeln!(f, "{}", data_def)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `write!()` with a format string that ends in a single newline
[INFO] [stdout]    --> src/display_impls.rs:170:13
[INFO] [stdout]     |
[INFO] [stdout] 170 |             write!(f, "{}\n", data_def)?;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#write_with_newline
[INFO] [stdout] help: use `writeln!` instead
[INFO] [stdout]     |
[INFO] [stdout] 170 -             write!(f, "{}\n", data_def)?;
[INFO] [stdout] 170 +             writeln!(f, "{}", data_def)?;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/ast_to_cps.rs:54:17
[INFO] [stdout]    |
[INFO] [stdout] 54 |         assert!(arms.len() > 0);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!arms.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: length comparison to zero
[INFO] [stdout]   --> src/ast_to_cps.rs:54:17
[INFO] [stdout]    |
[INFO] [stdout] 54 |         assert!(arms.len() > 0);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!arms.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: length comparison to zero
[INFO] [stdout]    --> src/ast_to_cps.rs:216:17
[INFO] [stdout]     |
[INFO] [stdout] 216 |         assert!(pats.len() > 0);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!pats.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: length comparison to zero
[INFO] [stdout]    --> src/ast_to_cps.rs:222:12
[INFO] [stdout]     |
[INFO] [stdout] 222 |         if pats.len() == 0 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `pats.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: length comparison to zero
[INFO] [stdout]    --> src/ast_to_cps.rs:216:17
[INFO] [stdout]     |
[INFO] [stdout] 216 |         assert!(pats.len() > 0);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!pats.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: length comparison to zero
[INFO] [stdout]    --> src/ast_to_cps.rs:222:12
[INFO] [stdout]     |
[INFO] [stdout] 222 |         if pats.len() == 0 {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `pats.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: length comparison to zero
[INFO] [stdout]    --> src/ast_to_cps.rs:318:30
[INFO] [stdout]     |
[INFO] [stdout] 318 |                     body: if pats.len() == 0 {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `pats.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: length comparison to zero
[INFO] [stdout]    --> src/ast_to_cps.rs:318:30
[INFO] [stdout]     |
[INFO] [stdout] 318 |                     body: if pats.len() == 0 {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `pats.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: this boolean expression can be simplified
[INFO] [stdout]    --> src/passes.rs:129:16
[INFO] [stdout]     |
[INFO] [stdout] 129 |         "!" => !(args[0] > 0) as i64,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^ help: try: `(args[0] <= 0)`
[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: this boolean expression can be simplified
[INFO] [stdout]    --> src/passes.rs:129:16
[INFO] [stdout]     |
[INFO] [stdout] 129 |         "!" => !(args[0] > 0) as i64,
[INFO] [stdout]     |                ^^^^^^^^^^^^^^ help: try: `(args[0] <= 0)`
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.03s
[INFO] running `Command { std: "docker" "inspect" "a51885fc6d6ec2acd0c3b342551b7105b80f6ae46733635af29b06b0364a2be5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a51885fc6d6ec2acd0c3b342551b7105b80f6ae46733635af29b06b0364a2be5", kill_on_drop: false }`
[INFO] [stdout] a51885fc6d6ec2acd0c3b342551b7105b80f6ae46733635af29b06b0364a2be5