[INFO] updating cached repository alekratz/not-perl
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/alekratz/not-perl
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/alekratz/not-perl" "work/ex/clippy-test-run/sources/stable/gh/alekratz/not-perl"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/alekratz/not-perl'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/alekratz/not-perl" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/alekratz/not-perl"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/alekratz/not-perl'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2a308bceec453c7c1e3f510d69c6f5ddd13c1eb5
[INFO] sha for GitHub repo alekratz/not-perl: 2a308bceec453c7c1e3f510d69c6f5ddd13c1eb5
[INFO] validating manifest of alekratz/not-perl on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of alekratz/not-perl on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing alekratz/not-perl
[INFO] finished frobbing alekratz/not-perl
[INFO] frobbed toml for alekratz/not-perl written to work/ex/clippy-test-run/sources/stable/gh/alekratz/not-perl/Cargo.toml
[INFO] started frobbing alekratz/not-perl
[INFO] finished frobbing alekratz/not-perl
[INFO] frobbed toml for alekratz/not-perl written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/alekratz/not-perl/Cargo.toml
[INFO] crate alekratz/not-perl has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting alekratz/not-perl against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/alekratz/not-perl:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e1972c43118fe570006ba4022022f44524ddb46c0381962dc85d54c24d172d47
[INFO] running `"docker" "start" "-a" "e1972c43118fe570006ba4022022f44524ddb46c0381962dc85d54c24d172d47"`
[INFO] [stderr]    Compiling enum-methods v0.0.8
[INFO] [stderr]     Checking not-perl v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/vm/storage.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |             functions: functions,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `functions`
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/vm/storage.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 35 |             functions: functions,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `functions`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/syntax/lexer.rs:289:13
[INFO] [stderr]     |
[INFO] [stderr] 289 |             return Ok(Token::FloatLit(number));
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(Token::FloatLit(number))`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/syntax/lexer.rs:291:13
[INFO] [stderr]     |
[INFO] [stderr] 291 |             return Ok(Token::IntLit(number, radix));
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(Token::IntLit(number, radix))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]   --> src/ir/function.rs:67:47
[INFO] [stderr]    |
[INFO] [stderr] 67 |             FunctionParam::Variable { symbol, ty: _, default: _ } => symbol.name(),
[INFO] [stderr]    |                                               ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unneeded_field_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]   --> src/ir/function.rs:67:54
[INFO] [stderr]    |
[INFO] [stderr] 67 |             FunctionParam::Variable { symbol, ty: _, default: _ } => symbol.name(),
[INFO] [stderr]    |                                                      ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `Variable { symbol, .. }`
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/vm/value.rs:155:13
[INFO] [stderr]     |
[INFO] [stderr] 155 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]  --> src/repl.rs:4:19
[INFO] [stderr]   |
[INFO] [stderr] 4 | const REPL_NAME: &'static str = "<stdin>";
[INFO] [stderr]   |                  -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]    --> src/compile/scope.rs:219:26
[INFO] [stderr]     |
[INFO] [stderr] 219 |         const BUILTINS: &'static [vm::BuiltinTy] = &[
[INFO] [stderr]     |                         -^^^^^^^---------------- help: consider removing `'static`: `&[vm::BuiltinTy]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]   --> src/compile/state.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |             operators: _,
[INFO] [stderr]    |             ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `CompileState { body, ty_scope, function_scope, mut variable_scope, repl: _repl, .. }`
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]    --> src/compile/state.rs:322:43
[INFO] [stderr]     |
[INFO] [stderr] 322 |                 FunctionParam::Variable { symbol: _, ty, default } => {
[INFO] [stderr]     |                                           ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: Try with `Variable { ty, default, .. }`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/compile/state.rs:414:16
[INFO] [stderr]     |
[INFO] [stderr] 414 |           } else {
[INFO] [stderr]     |  ________________^
[INFO] [stderr] 415 | |             if lhs_context == ValueContext::Push {
[INFO] [stderr] 416 | |                 // evaluate LHS, evaluate RHS, pop RHS into LHS ref
[INFO] [stderr] 417 | |                 assign_body.push(Bc::PushValue(vm::Value::RefCanary));
[INFO] [stderr] ...   |
[INFO] [stderr] 424 | |             }
[INFO] [stderr] 425 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 414 |         } else if lhs_context == ValueContext::Push {
[INFO] [stderr] 415 |     // evaluate LHS, evaluate RHS, pop RHS into LHS ref
[INFO] [stderr] 416 |     assign_body.push(Bc::PushValue(vm::Value::RefCanary));
[INFO] [stderr] 417 |     assign_body.append(&mut self.compile_value(lhs, ValueContext::Push)?);
[INFO] [stderr] 418 |     assign_body.append(&mut self.compile_value(rhs, ValueContext::Push)?);
[INFO] [stderr] 419 |     assign_body.push(Bc::PopRefAndStore);
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]   --> src/main.rs:75:12
[INFO] [stderr]    |
[INFO] [stderr] 75 |       } else {
[INFO] [stderr]    |  ____________^
[INFO] [stderr] 76 | |         if let Err(e) = exec(argv) {
[INFO] [stderr] 77 | |             eprintln!("{}", e);
[INFO] [stderr] 78 | |             process::exit(1);
[INFO] [stderr] 79 | |         }
[INFO] [stderr] 80 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 75 |     } else if let Err(e) = exec(argv) {
[INFO] [stderr] 76 |     eprintln!("{}", e);
[INFO] [stderr] 77 |     process::exit(1);
[INFO] [stderr] 78 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/syntax/lexer.rs:289:13
[INFO] [stderr]     |
[INFO] [stderr] 289 |             return Ok(Token::FloatLit(number));
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(Token::FloatLit(number))`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/syntax/lexer.rs:291:13
[INFO] [stderr]     |
[INFO] [stderr] 291 |             return Ok(Token::IntLit(number, radix));
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok(Token::IntLit(number, radix))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]   --> src/ir/function.rs:67:47
[INFO] [stderr]    |
[INFO] [stderr] 67 |             FunctionParam::Variable { symbol, ty: _, default: _ } => symbol.name(),
[INFO] [stderr]    |                                               ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unneeded_field_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]   --> src/ir/function.rs:67:54
[INFO] [stderr]    |
[INFO] [stderr] 67 |             FunctionParam::Variable { symbol, ty: _, default: _ } => symbol.name(),
[INFO] [stderr]    |                                                      ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `Variable { symbol, .. }`
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/vm/value.rs:155:13
[INFO] [stderr]     |
[INFO] [stderr] 155 |             return None;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]  --> src/repl.rs:4:19
[INFO] [stderr]   |
[INFO] [stderr] 4 | const REPL_NAME: &'static str = "<stdin>";
[INFO] [stderr]   |                  -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]    --> src/compile/scope.rs:219:26
[INFO] [stderr]     |
[INFO] [stderr] 219 |         const BUILTINS: &'static [vm::BuiltinTy] = &[
[INFO] [stderr]     |                         -^^^^^^^---------------- help: consider removing `'static`: `&[vm::BuiltinTy]`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]   --> src/compile/state.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |             operators: _,
[INFO] [stderr]    |             ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: Try with `CompileState { body, ty_scope, function_scope, mut variable_scope, repl: _repl, .. }`
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: You matched a field with a wildcard pattern. Consider using `..` instead
[INFO] [stderr]    --> src/compile/state.rs:322:43
[INFO] [stderr]     |
[INFO] [stderr] 322 |                 FunctionParam::Variable { symbol: _, ty, default } => {
[INFO] [stderr]     |                                           ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: Try with `Variable { ty, default, .. }`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unneeded_field_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]    --> src/compile/state.rs:414:16
[INFO] [stderr]     |
[INFO] [stderr] 414 |           } else {
[INFO] [stderr]     |  ________________^
[INFO] [stderr] 415 | |             if lhs_context == ValueContext::Push {
[INFO] [stderr] 416 | |                 // evaluate LHS, evaluate RHS, pop RHS into LHS ref
[INFO] [stderr] 417 | |                 assign_body.push(Bc::PushValue(vm::Value::RefCanary));
[INFO] [stderr] ...   |
[INFO] [stderr] 424 | |             }
[INFO] [stderr] 425 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]     |
[INFO] [stderr] 414 |         } else if lhs_context == ValueContext::Push {
[INFO] [stderr] 415 |     // evaluate LHS, evaluate RHS, pop RHS into LHS ref
[INFO] [stderr] 416 |     assign_body.push(Bc::PushValue(vm::Value::RefCanary));
[INFO] [stderr] 417 |     assign_body.append(&mut self.compile_value(lhs, ValueContext::Push)?);
[INFO] [stderr] 418 |     assign_body.append(&mut self.compile_value(rhs, ValueContext::Push)?);
[INFO] [stderr] 419 |     assign_body.push(Bc::PopRefAndStore);
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]   --> src/main.rs:75:12
[INFO] [stderr]    |
[INFO] [stderr] 75 |       } else {
[INFO] [stderr]    |  ____________^
[INFO] [stderr] 76 | |         if let Err(e) = exec(argv) {
[INFO] [stderr] 77 | |             eprintln!("{}", e);
[INFO] [stderr] 78 | |             process::exit(1);
[INFO] [stderr] 79 | |         }
[INFO] [stderr] 80 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 75 |     } else if let Err(e) = exec(argv) {
[INFO] [stderr] 76 |     eprintln!("{}", e);
[INFO] [stderr] 77 |     process::exit(1);
[INFO] [stderr] 78 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/syntax/lexer.rs:326:9
[INFO] [stderr]     |
[INFO] [stderr] 326 |         self.curr.clone()
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.curr`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/syntax/parser.rs:206:26
[INFO] [stderr]     |
[INFO] [stderr] 206 |                   .map(|t| if let &Token::Op(ref op) = t.token() {
[INFO] [stderr]     |  __________________________^
[INFO] [stderr] 207 | |                     top.contains(op)
[INFO] [stderr] 208 | |                 } else {
[INFO] [stderr] 209 | |                     false
[INFO] [stderr] 210 | |                 })
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 206 |                 .map(|t| if let Token::Op(ref op) = *t.token() {
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/syntax/parser.rs:304:41
[INFO] [stderr]     |
[INFO] [stderr] 304 |                     return Err(self.err(format!("got 'self' keyword outside of type declaration")));
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"got 'self' keyword outside of type declaration".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/syntax/parser.rs:305:27
[INFO] [stderr]     |
[INFO] [stderr] 305 |                 } else if params.len() > 0 {
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!params.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/syntax/parser.rs:306:41
[INFO] [stderr]     |
[INFO] [stderr] 306 |                     return Err(self.err(format!("'self' parameter is only allowed as the first argument to a function")));
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"'self' parameter is only allowed as the first argument to a function".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `is_*` usually take self by reference or no self; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/syntax/parser.rs:453:23
[INFO] [stderr]     |
[INFO] [stderr] 453 |     fn is_token_match(&mut self, token: &Token) -> bool {
[INFO] [stderr]     |                       ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::wrong_self_convention)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `is_*` usually take self by reference or no self; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/syntax/parser.rs:461:29
[INFO] [stderr]     |
[INFO] [stderr] 461 |     fn is_lookahead<A: Ast>(&mut self) -> bool {
[INFO] [stderr]     |                             ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]    --> src/syntax/parser.rs:538:58
[INFO] [stderr]     |
[INFO] [stderr] 538 |                               got.map(|s| s.to_string()).unwrap_or("EOF".to_string()));
[INFO] [stderr]     |                                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| "EOF".to_string())`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: defining a method called `from_str` on this type; consider implementing the `std::str::FromStr` trait or choosing a less ambiguous name
[INFO] [stderr]    --> src/syntax/token.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 | /     pub fn from_str(other: impl AsRef<str>) -> Option<Self> {
[INFO] [stderr] 101 | |         match other.as_ref() {
[INFO] [stderr] 102 | |             "=" => Some(AssignOp::Equals),
[INFO] [stderr] 103 | |             "+=" => Some(AssignOp::PlusEquals),
[INFO] [stderr] ...   |
[INFO] [stderr] 109 | |         }
[INFO] [stderr] 110 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::should_implement_trait)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/syntax/token.rs:198:9
[INFO] [stderr]     |
[INFO] [stderr] 198 | /         if let &Token::Op(_) = self {
[INFO] [stderr] 199 | |             true
[INFO] [stderr] 200 | |         } else {
[INFO] [stderr] 201 | |             false
[INFO] [stderr] 202 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 198 |         if let Token::Op(_) = *self {
[INFO] [stderr]     |                ^^^^^^^^^^^^   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/syntax/token.rs:214:9
[INFO] [stderr]     |
[INFO] [stderr] 214 | /         if let &Token::AssignOp(_) = self {
[INFO] [stderr] 215 | |             true
[INFO] [stderr] 216 | |         } else {
[INFO] [stderr] 217 | |             false
[INFO] [stderr] 218 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 214 |         if let Token::AssignOp(_) = *self {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/syntax/token.rs:229:23
[INFO] [stderr]     |
[INFO] [stderr] 229 |                 10 => format!("{}", i),
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^ help: consider using .to_string(): `i.to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: large size difference between variants
[INFO] [stderr]   --> src/syntax/tree.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     Assign(Expr<'n>, AssignOp, Expr<'n>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::large_enum_variant)] on by default
[INFO] [stderr] help: consider boxing the large fields to reduce the total size of the enum
[INFO] [stderr]   --> src/syntax/tree.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     Assign(Expr<'n>, AssignOp, Expr<'n>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant
[INFO] [stderr] 
[INFO] [stderr] warning: large size difference between variants
[INFO] [stderr]   --> src/ir/action.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Assign(Value<'n>, AssignOp, Value<'n>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider boxing the large fields to reduce the total size of the enum
[INFO] [stderr]   --> src/ir/action.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Assign(Value<'n>, AssignOp, Value<'n>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant
[INFO] [stderr] 
[INFO] [stderr] warning: Err(_) will match all errors, maybe not a good idea
[INFO] [stderr]   --> src/ir/value.rs:28:21
[INFO] [stderr]    |
[INFO] [stderr] 28 |                     Err(_) => unimplemented!("bigint")
[INFO] [stderr]    |                     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_wild_err_arm)] on by default
[INFO] [stderr]    = note: to remove this warning, match each error separately or use unreachable macro
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_wild_err_arm
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/vm/value.rs:59:32
[INFO] [stderr]    |
[INFO] [stderr] 59 |             Value::Array(_) => format!("TODO : vm::Value array display string"),
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"TODO : vm::Value array display string".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/vm/ty.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn name(&self) -> &'static str {
[INFO] [stderr]    |                 ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you probably are missing some parameter in your format string
[INFO] [stderr]   --> src/vm/condition.rs:52:25
[INFO] [stderr]    |
[INFO] [stderr] 52 |             _ => panic!("cannot convert IR op {:?} to VM comparison op"),
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::panic_params)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#panic_params
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `vm::storage::Storage`
[INFO] [stderr]   --> src/vm/storage.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 | /     pub fn new() -> Self {
[INFO] [stderr] 46 | |         Storage {
[INFO] [stderr] 47 | |             scope_stack: vec![],
[INFO] [stderr] 48 | |             value_stack: vec![],
[INFO] [stderr] ...  |
[INFO] [stderr] 54 | |         }
[INFO] [stderr] 55 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 5  | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `vm::Vm`
[INFO] [stderr]   --> src/vm/mod.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 | /     pub fn new() -> Self {
[INFO] [stderr] 52 | |         Vm {
[INFO] [stderr] 53 | |             storage: Storage::new(),
[INFO] [stderr] 54 | |             call_stack: vec![],
[INFO] [stderr] ...  |
[INFO] [stderr] 58 | |         }
[INFO] [stderr] 59 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 50 | impl Default for vm::Vm {
[INFO] [stderr] 51 |     fn default() -> Self {
[INFO] [stderr] 52 |         Self::new()
[INFO] [stderr] 53 |     }
[INFO] [stderr] 54 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/vm/mod.rs:81:29
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let prev_scope = if prev_storage.scope_stack.len() == 0 {
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `prev_storage.scope_stack.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/vm/mod.rs:150:17
[INFO] [stderr]     |
[INFO] [stderr] 150 |             let ref bc = block[pc];
[INFO] [stderr]     |             ----^^^^^^------------- help: try: `let bc = &block[pc];`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `repl::Repl`
[INFO] [stderr]   --> src/repl.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | /     pub fn new() -> Self {
[INFO] [stderr] 13 | |         let mut state = CompileState::repl();
[INFO] [stderr] 14 | |         state.begin();
[INFO] [stderr] 15 | |         Repl {
[INFO] [stderr] ...  |
[INFO] [stderr] 18 | |         }
[INFO] [stderr] 19 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 11 | impl Default for repl::Repl {
[INFO] [stderr] 12 |     fn default() -> Self {
[INFO] [stderr] 13 |         Self::new()
[INFO] [stderr] 14 |     }
[INFO] [stderr] 15 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]    --> src/compile/scope.rs:114:9
[INFO] [stderr]     |
[INFO] [stderr] 114 | /         self.iter()
[INFO] [stderr] 115 | |             .filter(|t| (predicate)(&t))
[INFO] [stderr] 116 | |             .next()
[INFO] [stderr]     | |___________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::filter_next)] on by default
[INFO] [stderr]     = note: replace `filter(|t| (predicate)(&t)).next()` with `find(|t| (predicate)(&t))`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]    --> src/compile/scope.rs:126:9
[INFO] [stderr]     |
[INFO] [stderr] 126 | /         self.iter_local()
[INFO] [stderr] 127 | |             .filter(|t| (predicate)(&t))
[INFO] [stderr] 128 | |             .next()
[INFO] [stderr]     | |___________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: replace `filter(|t| (predicate)(&t)).next()` with `find(|t| (predicate)(&t))`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `compile::scope::TyScope`
[INFO] [stderr]    --> src/compile/scope.rs:211:5
[INFO] [stderr]     |
[INFO] [stderr] 211 | /     pub fn new() -> Self {
[INFO] [stderr] 212 | |         TyScope {
[INFO] [stderr] 213 | |             scope: Scope::empty(TySymbolAlloc::new()),
[INFO] [stderr] 214 | |         }
[INFO] [stderr] 215 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 210 | impl Default for compile::scope::TyScope {
[INFO] [stderr] 211 |     fn default() -> Self {
[INFO] [stderr] 212 |         Self::new()
[INFO] [stderr] 213 |     }
[INFO] [stderr] 214 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `compile::scope::FunctionScope`
[INFO] [stderr]    --> src/compile/scope.rs:286:5
[INFO] [stderr]     |
[INFO] [stderr] 286 | /     pub fn new() -> Self {
[INFO] [stderr] 287 | |         FunctionScope {
[INFO] [stderr] 288 | |             scope: Scope::empty(FunctionSymbolAlloc::new()),
[INFO] [stderr] 289 | |             vm_functions: vec![],
[INFO] [stderr] 290 | |         }
[INFO] [stderr] 291 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 285 | impl Default for compile::scope::FunctionScope {
[INFO] [stderr] 286 |     fn default() -> Self {
[INFO] [stderr] 287 |         Self::new()
[INFO] [stderr] 288 |     }
[INFO] [stderr] 289 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]    --> src/compile/scope.rs:301:56
[INFO] [stderr]     |
[INFO] [stderr] 301 |                 return_ty: ir::TyExpr::from_builtin_ty(function.return_ty.into()),
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `function.return_ty`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]    --> src/compile/scope.rs:319:9
[INFO] [stderr]     |
[INFO] [stderr] 319 | /         self.vm_functions.iter()
[INFO] [stderr] 320 | |             .filter(|function| function.is_builtin() && function.name() == name)
[INFO] [stderr] 321 | |             .next()
[INFO] [stderr]     | |___________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: replace `filter(|function| function.is_builtin() && function.name() == name).next()` with `find(|function| function.is_builtin() && function.name() == name)`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `compile::scope::VariableScope`
[INFO] [stderr]    --> src/compile/scope.rs:349:5
[INFO] [stderr]     |
[INFO] [stderr] 349 | /     pub fn new() -> Self {
[INFO] [stderr] 350 | |         VariableScope {
[INFO] [stderr] 351 | |             scope: Scope::empty(VariableSymbolAlloc::new()),
[INFO] [stderr] 352 | |         }
[INFO] [stderr] 353 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 348 | impl Default for compile::scope::VariableScope {
[INFO] [stderr] 349 |     fn default() -> Self {
[INFO] [stderr] 350 |         Self::new()
[INFO] [stderr] 351 |     }
[INFO] [stderr] 352 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `compile::symbol::SymbolAlloc<T>`
[INFO] [stderr]    --> src/compile/symbol.rs:119:5
[INFO] [stderr]     |
[INFO] [stderr] 119 | /     pub fn new() -> Self {
[INFO] [stderr] 120 | |         SymbolAlloc { reserve_next: T::Symbol::default() }
[INFO] [stderr] 121 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 86  | #[derive(Default)]
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `compile::symbol::VariableSymbolAlloc`
[INFO] [stderr]    --> src/compile/symbol.rs:161:5
[INFO] [stderr]     |
[INFO] [stderr] 161 | /     pub fn new() -> Self {
[INFO] [stderr] 162 | |         VariableSymbolAlloc {
[INFO] [stderr] 163 | |             reserve_next: VariableSymbol::default(),
[INFO] [stderr] 164 | |             locals: vec![],
[INFO] [stderr] 165 | |         }
[INFO] [stderr] 166 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 126 | #[derive(Default)]
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `compile::state::CompileState`
[INFO] [stderr]   --> src/compile/state.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 | /     pub fn new() -> Self {
[INFO] [stderr] 35 | |         let builtin_functions = vm::BUILTIN_FUNCTIONS.iter()
[INFO] [stderr] 36 | |             .cloned()
[INFO] [stderr] 37 | |             .chain(vm::BUILTIN_OPERATORS.iter().map(|(_, f)| f).cloned())
[INFO] [stderr] ...  |
[INFO] [stderr] 56 | |         }
[INFO] [stderr] 57 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 33 | impl Default for compile::state::CompileState {
[INFO] [stderr] 34 |     fn default() -> Self {
[INFO] [stderr] 35 |         Self::new()
[INFO] [stderr] 36 |     }
[INFO] [stderr] 37 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]    --> src/compile/state.rs:217:30
[INFO] [stderr]     |
[INFO] [stderr] 217 |           let user_predicate = udt_scope.iter()
[INFO] [stderr]     |  ______________________________^
[INFO] [stderr] 218 | |             .filter(|f| f.name == "is?")
[INFO] [stderr] 219 | |             .next();
[INFO] [stderr]     | |___________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: replace `filter(|f| f.name == "is?").next()` with `find(|f| f.name == "is?")`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/syntax/lexer.rs:326:9
[INFO] [stderr]     |
[INFO] [stderr] 326 |         self.curr.clone()
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.curr`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: use of `expect` followed by a function call
[INFO] [stderr]    --> src/compile/state.rs:303:22
[INFO] [stderr]     |
[INFO] [stderr] 303 |                       .expect(&format!("symbol for function {} (param count {}) was expected to exist, but does not",
[INFO] [stderr]     |  ______________________^
[INFO] [stderr] 304 | |                                      name, function.params.len()))
[INFO] [stderr]     | |__________________________________________________________________^ help: try this: `unwrap_or_else(|| panic!("symbol for function {} (param count {}) was expected to exist, but does not", name))`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::expect_fun_call)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#expect_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]    --> src/compile/state.rs:361:14
[INFO] [stderr]     |
[INFO] [stderr] 361 |             .ok_or(format!("undefined type: {}", function.return_ty))?
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| format!("undefined type: {}", function.return_ty))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:390:44
[INFO] [stderr]     |
[INFO] [stderr] 390 |                     Symbol::Variable(s) => self.lookup_or_insert_local_variable(s).clone(),
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.lookup_or_insert_local_variable(s)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:439:27
[INFO] [stderr]     |
[INFO] [stderr] 439 |                   let sym = self.lookup_or_insert_local_variable(value.as_inner().name())
[INFO] [stderr]     |  ___________________________^
[INFO] [stderr] 440 | |                     .clone();
[INFO] [stderr]     | |____________________________^ help: try removing the `clone` call: `self.lookup_or_insert_local_variable(value.as_inner().name())`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]    --> src/compile/state.rs:455:30
[INFO] [stderr]     |
[INFO] [stderr] 455 |                             .ok_or(format!("unknown function `{}`", s))?
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| format!("unknown function `{}`", s))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:467:38
[INFO] [stderr]     |
[INFO] [stderr] 467 |                         let symbol = self.lookup_or_insert_local_variable(s).clone();
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.lookup_or_insert_local_variable(s)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:488:91
[INFO] [stderr]     |
[INFO] [stderr] 488 |                     expr_body.append(&mut self.compile_value(lhs, ValueContext::StoreInto(lhs_sym.clone()))?);
[INFO] [stderr]     |                                                                                           ^^^^^^^^^^^^^^^ help: try removing the `clone` call: `lhs_sym`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:497:91
[INFO] [stderr]     |
[INFO] [stderr] 497 |                     expr_body.append(&mut self.compile_value(rhs, ValueContext::StoreInto(rhs_sym.clone()))?);
[INFO] [stderr]     |                                                                                           ^^^^^^^^^^^^^^^ help: try removing the `clone` call: `rhs_sym`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:573:88
[INFO] [stderr]     |
[INFO] [stderr] 573 |                         let mut body = self.compile_value(lhs, ValueContext::StoreInto(lhs_sym.clone()))?;
[INFO] [stderr]     |                                                                                        ^^^^^^^^^^^^^^^ help: try removing the `clone` call: `lhs_sym`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:574:90
[INFO] [stderr]     |
[INFO] [stderr] 574 |                         body.append(&mut self.compile_value(rhs, ValueContext::StoreInto(rhs_sym.clone()))?);
[INFO] [stderr]     |                                                                                          ^^^^^^^^^^^^^^^ help: try removing the `clone` call: `rhs_sym`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:582:96
[INFO] [stderr]     |
[INFO] [stderr] 582 |                         let mut value_body = self.compile_value(value, ValueContext::StoreInto(result_sym.clone()))?;
[INFO] [stderr]     |                                                                                                ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `result_sym`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:592:88
[INFO] [stderr]     |
[INFO] [stderr] 592 |                 let mut value_body = self.compile_value(value, ValueContext::StoreInto(result_sym.clone()))?;
[INFO] [stderr]     |                                                                                        ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `result_sym`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:53:13
[INFO] [stderr]    |
[INFO] [stderr] 53 |             write!(stdout, " > ");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/main.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 57 |         if line.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `line.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/syntax/parser.rs:206:26
[INFO] [stderr]     |
[INFO] [stderr] 206 |                   .map(|t| if let &Token::Op(ref op) = t.token() {
[INFO] [stderr]     |  __________________________^
[INFO] [stderr] 207 | |                     top.contains(op)
[INFO] [stderr] 208 | |                 } else {
[INFO] [stderr] 209 | |                     false
[INFO] [stderr] 210 | |                 })
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::match_ref_pats)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 206 |                 .map(|t| if let Token::Op(ref op) = *t.token() {
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^   ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/syntax/parser.rs:304:41
[INFO] [stderr]     |
[INFO] [stderr] 304 |                     return Err(self.err(format!("got 'self' keyword outside of type declaration")));
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"got 'self' keyword outside of type declaration".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_format)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]    --> src/syntax/parser.rs:305:27
[INFO] [stderr]     |
[INFO] [stderr] 305 |                 } else if params.len() > 0 {
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!params.is_empty()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/syntax/parser.rs:306:41
[INFO] [stderr]     |
[INFO] [stderr] 306 |                     return Err(self.err(format!("'self' parameter is only allowed as the first argument to a function")));
[INFO] [stderr]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"'self' parameter is only allowed as the first argument to a function".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `is_*` usually take self by reference or no self; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/syntax/parser.rs:453:23
[INFO] [stderr]     |
[INFO] [stderr] 453 |     fn is_token_match(&mut self, token: &Token) -> bool {
[INFO] [stderr]     |                       ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::wrong_self_convention)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `is_*` usually take self by reference or no self; consider choosing a less ambiguous name
[INFO] [stderr]    --> src/syntax/parser.rs:461:29
[INFO] [stderr]     |
[INFO] [stderr] 461 |     fn is_lookahead<A: Ast>(&mut self) -> bool {
[INFO] [stderr]     |                             ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
[INFO] [stderr] 
[INFO] [stderr] warning: use of `unwrap_or` followed by a function call
[INFO] [stderr]    --> src/syntax/parser.rs:538:58
[INFO] [stderr]     |
[INFO] [stderr] 538 |                               got.map(|s| s.to_string()).unwrap_or("EOF".to_string()));
[INFO] [stderr]     |                                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `unwrap_or_else(|| "EOF".to_string())`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: defining a method called `from_str` on this type; consider implementing the `std::str::FromStr` trait or choosing a less ambiguous name
[INFO] [stderr]    --> src/syntax/token.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 | /     pub fn from_str(other: impl AsRef<str>) -> Option<Self> {
[INFO] [stderr] 101 | |         match other.as_ref() {
[INFO] [stderr] 102 | |             "=" => Some(AssignOp::Equals),
[INFO] [stderr] 103 | |             "+=" => Some(AssignOp::PlusEquals),
[INFO] [stderr] ...   |
[INFO] [stderr] 109 | |         }
[INFO] [stderr] 110 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::should_implement_trait)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/syntax/token.rs:198:9
[INFO] [stderr]     |
[INFO] [stderr] 198 | /         if let &Token::Op(_) = self {
[INFO] [stderr] 199 | |             true
[INFO] [stderr] 200 | |         } else {
[INFO] [stderr] 201 | |             false
[INFO] [stderr] 202 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 198 |         if let Token::Op(_) = *self {
[INFO] [stderr]     |                ^^^^^^^^^^^^   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: you don't need to add `&` to all patterns
[INFO] [stderr]    --> src/syntax/token.rs:214:9
[INFO] [stderr]     |
[INFO] [stderr] 214 | /         if let &Token::AssignOp(_) = self {
[INFO] [stderr] 215 | |             true
[INFO] [stderr] 216 | |         } else {
[INFO] [stderr] 217 | |             false
[INFO] [stderr] 218 | |         }
[INFO] [stderr]     | |_________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_ref_pats
[INFO] [stderr] help: instead of prefixing all patterns with `&`, you can dereference the expression
[INFO] [stderr]     |
[INFO] [stderr] 214 |         if let Token::AssignOp(_) = *self {
[INFO] [stderr]     |                ^^^^^^^^^^^^^^^^^^   ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]    --> src/syntax/token.rs:229:23
[INFO] [stderr]     |
[INFO] [stderr] 229 |                 10 => format!("{}", i),
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^ help: consider using .to_string(): `i.to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: large size difference between variants
[INFO] [stderr]   --> src/syntax/tree.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     Assign(Expr<'n>, AssignOp, Expr<'n>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::large_enum_variant)] on by default
[INFO] [stderr] help: consider boxing the large fields to reduce the total size of the enum
[INFO] [stderr]   --> src/syntax/tree.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     Assign(Expr<'n>, AssignOp, Expr<'n>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant
[INFO] [stderr] 
[INFO] [stderr] warning: large size difference between variants
[INFO] [stderr]   --> src/ir/action.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Assign(Value<'n>, AssignOp, Value<'n>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] help: consider boxing the large fields to reduce the total size of the enum
[INFO] [stderr]   --> src/ir/action.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Assign(Value<'n>, AssignOp, Value<'n>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#large_enum_variant
[INFO] [stderr] 
[INFO] [stderr] warning: Err(_) will match all errors, maybe not a good idea
[INFO] [stderr]   --> src/ir/value.rs:28:21
[INFO] [stderr]    |
[INFO] [stderr] 28 |                     Err(_) => unimplemented!("bigint")
[INFO] [stderr]    |                     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::match_wild_err_arm)] on by default
[INFO] [stderr]    = note: to remove this warning, match each error separately or use unreachable macro
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_wild_err_arm
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `format!`
[INFO] [stderr]   --> src/vm/value.rs:59:32
[INFO] [stderr]    |
[INFO] [stderr] 59 |             Value::Array(_) => format!("TODO : vm::Value array display string"),
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using .to_string(): `"TODO : vm::Value array display string".to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_format
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/vm/ty.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 |     pub fn name(&self) -> &'static str {
[INFO] [stderr]    |                 ^^^^^ help: consider passing by value instead: `self`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: you probably are missing some parameter in your format string
[INFO] [stderr]   --> src/vm/condition.rs:52:25
[INFO] [stderr]    |
[INFO] [stderr] 52 |             _ => panic!("cannot convert IR op {:?} to VM comparison op"),
[INFO] [stderr]    |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::panic_params)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#panic_params
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `vm::storage::Storage`
[INFO] [stderr]   --> src/vm/storage.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 | /     pub fn new() -> Self {
[INFO] [stderr] 46 | |         Storage {
[INFO] [stderr] 47 | |             scope_stack: vec![],
[INFO] [stderr] 48 | |             value_stack: vec![],
[INFO] [stderr] ...  |
[INFO] [stderr] 54 | |         }
[INFO] [stderr] 55 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 5  | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `vm::Vm`
[INFO] [stderr]   --> src/vm/mod.rs:51:5
[INFO] [stderr]    |
[INFO] [stderr] 51 | /     pub fn new() -> Self {
[INFO] [stderr] 52 | |         Vm {
[INFO] [stderr] 53 | |             storage: Storage::new(),
[INFO] [stderr] 54 | |             call_stack: vec![],
[INFO] [stderr] ...  |
[INFO] [stderr] 58 | |         }
[INFO] [stderr] 59 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 50 | impl Default for vm::Vm {
[INFO] [stderr] 51 |     fn default() -> Self {
[INFO] [stderr] 52 |         Self::new()
[INFO] [stderr] 53 |     }
[INFO] [stderr] 54 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/vm/mod.rs:81:29
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let prev_scope = if prev_storage.scope_stack.len() == 0 {
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `prev_storage.scope_stack.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: `ref` on an entire `let` pattern is discouraged, take a reference with `&` instead
[INFO] [stderr]    --> src/vm/mod.rs:150:17
[INFO] [stderr]     |
[INFO] [stderr] 150 |             let ref bc = block[pc];
[INFO] [stderr]     |             ----^^^^^^------------- help: try: `let bc = &block[pc];`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::toplevel_ref_arg)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#toplevel_ref_arg
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `repl::Repl`
[INFO] [stderr]   --> src/repl.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | /     pub fn new() -> Self {
[INFO] [stderr] 13 | |         let mut state = CompileState::repl();
[INFO] [stderr] 14 | |         state.begin();
[INFO] [stderr] 15 | |         Repl {
[INFO] [stderr] ...  |
[INFO] [stderr] 18 | |         }
[INFO] [stderr] 19 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 11 | impl Default for repl::Repl {
[INFO] [stderr] 12 |     fn default() -> Self {
[INFO] [stderr] 13 |         Self::new()
[INFO] [stderr] 14 |     }
[INFO] [stderr] 15 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]    --> src/compile/scope.rs:114:9
[INFO] [stderr]     |
[INFO] [stderr] 114 | /         self.iter()
[INFO] [stderr] 115 | |             .filter(|t| (predicate)(&t))
[INFO] [stderr] 116 | |             .next()
[INFO] [stderr]     | |___________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::filter_next)] on by default
[INFO] [stderr]     = note: replace `filter(|t| (predicate)(&t)).next()` with `find(|t| (predicate)(&t))`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]    --> src/compile/scope.rs:126:9
[INFO] [stderr]     |
[INFO] [stderr] 126 | /         self.iter_local()
[INFO] [stderr] 127 | |             .filter(|t| (predicate)(&t))
[INFO] [stderr] 128 | |             .next()
[INFO] [stderr]     | |___________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: replace `filter(|t| (predicate)(&t)).next()` with `find(|t| (predicate)(&t))`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `compile::scope::TyScope`
[INFO] [stderr]    --> src/compile/scope.rs:211:5
[INFO] [stderr]     |
[INFO] [stderr] 211 | /     pub fn new() -> Self {
[INFO] [stderr] 212 | |         TyScope {
[INFO] [stderr] 213 | |             scope: Scope::empty(TySymbolAlloc::new()),
[INFO] [stderr] 214 | |         }
[INFO] [stderr] 215 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 210 | impl Default for compile::scope::TyScope {
[INFO] [stderr] 211 |     fn default() -> Self {
[INFO] [stderr] 212 |         Self::new()
[INFO] [stderr] 213 |     }
[INFO] [stderr] 214 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `compile::scope::FunctionScope`
[INFO] [stderr]    --> src/compile/scope.rs:286:5
[INFO] [stderr]     |
[INFO] [stderr] 286 | /     pub fn new() -> Self {
[INFO] [stderr] 287 | |         FunctionScope {
[INFO] [stderr] 288 | |             scope: Scope::empty(FunctionSymbolAlloc::new()),
[INFO] [stderr] 289 | |             vm_functions: vec![],
[INFO] [stderr] 290 | |         }
[INFO] [stderr] 291 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 285 | impl Default for compile::scope::FunctionScope {
[INFO] [stderr] 286 |     fn default() -> Self {
[INFO] [stderr] 287 |         Self::new()
[INFO] [stderr] 288 |     }
[INFO] [stderr] 289 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: identical conversion
[INFO] [stderr]    --> src/compile/scope.rs:301:56
[INFO] [stderr]     |
[INFO] [stderr] 301 |                 return_ty: ir::TyExpr::from_builtin_ty(function.return_ty.into()),
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider removing `.into()`: `function.return_ty`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::identity_conversion)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_conversion
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]    --> src/compile/scope.rs:319:9
[INFO] [stderr]     |
[INFO] [stderr] 319 | /         self.vm_functions.iter()
[INFO] [stderr] 320 | |             .filter(|function| function.is_builtin() && function.name() == name)
[INFO] [stderr] 321 | |             .next()
[INFO] [stderr]     | |___________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: replace `filter(|function| function.is_builtin() && function.name() == name).next()` with `find(|function| function.is_builtin() && function.name() == name)`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `compile::scope::VariableScope`
[INFO] [stderr]    --> src/compile/scope.rs:349:5
[INFO] [stderr]     |
[INFO] [stderr] 349 | /     pub fn new() -> Self {
[INFO] [stderr] 350 | |         VariableScope {
[INFO] [stderr] 351 | |             scope: Scope::empty(VariableSymbolAlloc::new()),
[INFO] [stderr] 352 | |         }
[INFO] [stderr] 353 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 348 | impl Default for compile::scope::VariableScope {
[INFO] [stderr] 349 |     fn default() -> Self {
[INFO] [stderr] 350 |         Self::new()
[INFO] [stderr] 351 |     }
[INFO] [stderr] 352 | }
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `compile::symbol::SymbolAlloc<T>`
[INFO] [stderr]    --> src/compile/symbol.rs:119:5
[INFO] [stderr]     |
[INFO] [stderr] 119 | /     pub fn new() -> Self {
[INFO] [stderr] 120 | |         SymbolAlloc { reserve_next: T::Symbol::default() }
[INFO] [stderr] 121 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 86  | #[derive(Default)]
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `compile::symbol::VariableSymbolAlloc`
[INFO] [stderr]    --> src/compile/symbol.rs:161:5
[INFO] [stderr]     |
[INFO] [stderr] 161 | /     pub fn new() -> Self {
[INFO] [stderr] 162 | |         VariableSymbolAlloc {
[INFO] [stderr] 163 | |             reserve_next: VariableSymbol::default(),
[INFO] [stderr] 164 | |             locals: vec![],
[INFO] [stderr] 165 | |         }
[INFO] [stderr] 166 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]     |
[INFO] [stderr] 126 | #[derive(Default)]
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `compile::state::CompileState`
[INFO] [stderr]   --> src/compile/state.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 | /     pub fn new() -> Self {
[INFO] [stderr] 35 | |         let builtin_functions = vm::BUILTIN_FUNCTIONS.iter()
[INFO] [stderr] 36 | |             .cloned()
[INFO] [stderr] 37 | |             .chain(vm::BUILTIN_OPERATORS.iter().map(|(_, f)| f).cloned())
[INFO] [stderr] ...  |
[INFO] [stderr] 56 | |         }
[INFO] [stderr] 57 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 33 | impl Default for compile::state::CompileState {
[INFO] [stderr] 34 |     fn default() -> Self {
[INFO] [stderr] 35 |         Self::new()
[INFO] [stderr] 36 |     }
[INFO] [stderr] 37 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: called `filter(p).next()` on an `Iterator`. This is more succinctly expressed by calling `.find(p)` instead.
[INFO] [stderr]    --> src/compile/state.rs:217:30
[INFO] [stderr]     |
[INFO] [stderr] 217 |           let user_predicate = udt_scope.iter()
[INFO] [stderr]     |  ______________________________^
[INFO] [stderr] 218 | |             .filter(|f| f.name == "is?")
[INFO] [stderr] 219 | |             .next();
[INFO] [stderr]     | |___________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: replace `filter(|f| f.name == "is?").next()` with `find(|f| f.name == "is?")`
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#filter_next
[INFO] [stderr] 
[INFO] [stderr] warning: use of `expect` followed by a function call
[INFO] [stderr]    --> src/compile/state.rs:303:22
[INFO] [stderr]     |
[INFO] [stderr] 303 |                       .expect(&format!("symbol for function {} (param count {}) was expected to exist, but does not",
[INFO] [stderr]     |  ______________________^
[INFO] [stderr] 304 | |                                      name, function.params.len()))
[INFO] [stderr]     | |__________________________________________________________________^ help: try this: `unwrap_or_else(|| panic!("symbol for function {} (param count {}) was expected to exist, but does not", name))`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::expect_fun_call)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#expect_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]    --> src/compile/state.rs:361:14
[INFO] [stderr]     |
[INFO] [stderr] 361 |             .ok_or(format!("undefined type: {}", function.return_ty))?
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| format!("undefined type: {}", function.return_ty))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:390:44
[INFO] [stderr]     |
[INFO] [stderr] 390 |                     Symbol::Variable(s) => self.lookup_or_insert_local_variable(s).clone(),
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.lookup_or_insert_local_variable(s)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:439:27
[INFO] [stderr]     |
[INFO] [stderr] 439 |                   let sym = self.lookup_or_insert_local_variable(value.as_inner().name())
[INFO] [stderr]     |  ___________________________^
[INFO] [stderr] 440 | |                     .clone();
[INFO] [stderr]     | |____________________________^ help: try removing the `clone` call: `self.lookup_or_insert_local_variable(value.as_inner().name())`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: use of `ok_or` followed by a function call
[INFO] [stderr]    --> src/compile/state.rs:455:30
[INFO] [stderr]     |
[INFO] [stderr] 455 |                             .ok_or(format!("unknown function `{}`", s))?
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `ok_or_else(|| format!("unknown function `{}`", s))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:467:38
[INFO] [stderr]     |
[INFO] [stderr] 467 |                         let symbol = self.lookup_or_insert_local_variable(s).clone();
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `self.lookup_or_insert_local_variable(s)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:488:91
[INFO] [stderr]     |
[INFO] [stderr] 488 |                     expr_body.append(&mut self.compile_value(lhs, ValueContext::StoreInto(lhs_sym.clone()))?);
[INFO] [stderr]     |                                                                                           ^^^^^^^^^^^^^^^ help: try removing the `clone` call: `lhs_sym`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:497:91
[INFO] [stderr]     |
[INFO] [stderr] 497 |                     expr_body.append(&mut self.compile_value(rhs, ValueContext::StoreInto(rhs_sym.clone()))?);
[INFO] [stderr]     |                                                                                           ^^^^^^^^^^^^^^^ help: try removing the `clone` call: `rhs_sym`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:573:88
[INFO] [stderr]     |
[INFO] [stderr] 573 |                         let mut body = self.compile_value(lhs, ValueContext::StoreInto(lhs_sym.clone()))?;
[INFO] [stderr]     |                                                                                        ^^^^^^^^^^^^^^^ help: try removing the `clone` call: `lhs_sym`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:574:90
[INFO] [stderr]     |
[INFO] [stderr] 574 |                         body.append(&mut self.compile_value(rhs, ValueContext::StoreInto(rhs_sym.clone()))?);
[INFO] [stderr]     |                                                                                          ^^^^^^^^^^^^^^^ help: try removing the `clone` call: `rhs_sym`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:582:96
[INFO] [stderr]     |
[INFO] [stderr] 582 |                         let mut value_body = self.compile_value(value, ValueContext::StoreInto(result_sym.clone()))?;
[INFO] [stderr]     |                                                                                                ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `result_sym`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/compile/state.rs:592:88
[INFO] [stderr]     |
[INFO] [stderr] 592 |                 let mut value_body = self.compile_value(value, ValueContext::StoreInto(result_sym.clone()))?;
[INFO] [stderr]     |                                                                                        ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `result_sym`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:53:13
[INFO] [stderr]    |
[INFO] [stderr] 53 |             write!(stdout, " > ");
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/main.rs:57:12
[INFO] [stderr]    |
[INFO] [stderr] 57 |         if line.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `line.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.87s
[INFO] running `"docker" "inspect" "e1972c43118fe570006ba4022022f44524ddb46c0381962dc85d54c24d172d47"`
[INFO] running `"docker" "rm" "-f" "e1972c43118fe570006ba4022022f44524ddb46c0381962dc85d54c24d172d47"`
[INFO] [stdout] e1972c43118fe570006ba4022022f44524ddb46c0381962dc85d54c24d172d47