[INFO] cloning repository https://github.com/mariosangiorgio/rulox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mariosangiorgio/rulox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmariosangiorgio%2Frulox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmariosangiorgio%2Frulox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9e9e44f1143aa74b62e43452a35cd4786aecabcf
[INFO] checking mariosangiorgio/rulox/9e9e44f1143aa74b62e43452a35cd4786aecabcf against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146470
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmariosangiorgio%2Frulox" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mariosangiorgio/rulox
[INFO] finished tweaking git repo https://github.com/mariosangiorgio/rulox
[INFO] tweaked toml for git repo https://github.com/mariosangiorgio/rulox written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mariosangiorgio/rulox on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mariosangiorgio/rulox 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rusty-fork v0.2.1
[INFO] [stderr]   Downloaded tempfile v3.0.4
[INFO] [stderr]   Downloaded rand_core v0.2.2
[INFO] [stderr]   Downloaded wait-timeout v0.1.5
[INFO] [stderr]   Downloaded lazy_static v1.1.0
[INFO] [stderr]   Downloaded rand_core v0.3.0
[INFO] [stderr]   Downloaded quote v0.6.8
[INFO] [stderr]   Downloaded bit-vec v0.5.0
[INFO] [stderr]   Downloaded proc-macro2 v0.4.20
[INFO] [stderr]   Downloaded num-derive v0.2.4
[INFO] [stderr]   Downloaded bit-set v0.5.0
[INFO] [stderr]   Downloaded byteorder v1.2.7
[INFO] [stderr]   Downloaded rand v0.5.5
[INFO] [stderr]   Downloaded regex-syntax v0.6.2
[INFO] [stderr]   Downloaded proptest v0.8.7
[INFO] [stderr]   Downloaded syn v0.15.14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a12dd96ae024197fc5ea99a4484d61a686b7b43730d73265aba603d9becbc13e
[INFO] running `Command { std: "docker" "start" "-a" "a12dd96ae024197fc5ea99a4484d61a686b7b43730d73265aba603d9becbc13e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a12dd96ae024197fc5ea99a4484d61a686b7b43730d73265aba603d9becbc13e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a12dd96ae024197fc5ea99a4484d61a686b7b43730d73265aba603d9becbc13e", kill_on_drop: false }`
[INFO] [stdout] a12dd96ae024197fc5ea99a4484d61a686b7b43730d73265aba603d9becbc13e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b9b91309ebc878829fb4a94f0beea1b5021f08f856359a283c5cea3b4e4e9f07
[INFO] running `Command { std: "docker" "start" "-a" "b9b91309ebc878829fb4a94f0beea1b5021f08f856359a283c5cea3b4e4e9f07", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling proc-macro2 v0.4.20
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-derive v0.2.4
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking remove_dir_all v0.5.1
[INFO] [stderr]     Checking wait-timeout v0.1.5
[INFO] [stderr]     Checking bit-vec v0.5.0
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]     Checking regex-syntax v0.6.2
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking bit-set v0.5.0
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.15.14
[INFO] [stderr]     Checking tempfile v3.0.4
[INFO] [stderr]     Checking rusty-fork v0.2.1
[INFO] [stderr]     Checking proptest v0.8.7
[INFO] [stderr]     Checking rulox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/frontend/scanner.rs:156:58
[INFO] [stdout]     |
[INFO] [stdout] 156 |                 self.current_position.increment_column();;
[INFO] [stdout]     |                                                          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/treewalk/interpreter.rs:94:21
[INFO] [stdout]    |
[INFO] [stdout] 94 |                     try!(
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]    --> src/treewalk/interpreter.rs:301:52
[INFO] [stdout]     |
[INFO] [stdout] 301 |     fn interpret(&self, environment: &Environment, &LexicalScopes) -> Result<Value, RuntimeError>;
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &LexicalScopes`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout]     = note: `#[warn(anonymous_parameters)]` (part of `#[warn(rust_2018_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:357:33
[INFO] [stdout]     |
[INFO] [stdout] 357 |                     let value = try!(s.value.interpret(environment, scopes));
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:419:21
[INFO] [stdout]     |
[INFO] [stdout] 419 |         let value = try!(self.right.interpret(environment, scopes));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:436:20
[INFO] [stdout]     |
[INFO] [stdout] 436 |         let left = try!(self.left.interpret(environment, scopes));
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:437:21
[INFO] [stdout]     |
[INFO] [stdout] 437 |         let right = try!(self.right.interpret(environment, scopes));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:488:28
[INFO] [stdout]     |
[INFO] [stdout] 488 |                 let left = try!(self.left.interpret(environment, scopes));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:496:28
[INFO] [stdout]     |
[INFO] [stdout] 496 |                 let left = try!(self.left.interpret(environment, scopes));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:565:34
[INFO] [stdout]     |
[INFO] [stdout] 565 |                     let result = try!(statement.execute(&environment, scopes));
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:573:33
[INFO] [stdout]     |
[INFO] [stdout] 573 |                 let condition = try!{c.condition.interpret(environment, scopes)
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:582:33
[INFO] [stdout]     |
[INFO] [stdout] 582 |                 let condition = try!{c.condition.interpret(environment, scopes)
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:591:23
[INFO] [stdout]     |
[INFO] [stdout] 591 |                 while try!{l.condition.interpret(environment, scopes)
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:594:21
[INFO] [stdout]     |
[INFO] [stdout] 594 |                     try!{l.body.execute(environment, scopes)};
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:610:37
[INFO] [stdout]     |
[INFO] [stdout] 610 |                         let value = try!(superclass.interpret(environment, scopes));
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/treewalk/lexical_scope_resolver.rs:35:23
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn resolve(&self, &mut LexicalScopesResolver) -> Result<(), LexicalScopesResolutionError>;
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut LexicalScopesResolver`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:149:21
[INFO] [stdout]     |
[INFO] [stdout] 149 |                     try!(statement.resolve(resolver));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:155:17
[INFO] [stdout]     |
[INFO] [stdout] 155 |                 try!(resolver.declare(*identifier));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:160:17
[INFO] [stdout]     |
[INFO] [stdout] 160 |                 try!(resolver.declare(*identifier));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:161:17
[INFO] [stdout]     |
[INFO] [stdout] 161 |                 try!(initializer.resolve(resolver));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:167:17
[INFO] [stdout]     |
[INFO] [stdout] 167 |                 try!(resolver.declare(c.name));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:173:21
[INFO] [stdout]     |
[INFO] [stdout] 173 |                     try!(superclass.resolve(resolver));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:180:21
[INFO] [stdout]     |
[INFO] [stdout] 180 |                     try!(method.resolve(resolver));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:270:17
[INFO] [stdout]     |
[INFO] [stdout] 270 |                 try!(e.callee.resolve(resolver));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:272:21
[INFO] [stdout]     |
[INFO] [stdout] 272 |                     try!(argument.resolve(resolver));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:277:17
[INFO] [stdout]     |
[INFO] [stdout] 277 |                 try!(g.instance.resolve(resolver));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:281:17
[INFO] [stdout]     |
[INFO] [stdout] 281 |                 try!(s.value.resolve(resolver));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:282:17
[INFO] [stdout]     |
[INFO] [stdout] 282 |                 try!(s.instance.resolve(resolver));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:294:9
[INFO] [stdout]     |
[INFO] [stdout] 294 |         try!{self.rvalue.resolve(resolver)};
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:306:9
[INFO] [stdout]     |
[INFO] [stdout] 306 |         try!(resolver.declare(self.name));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |         try!(self.body.resolve(resolver));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:312:13
[INFO] [stdout]     |
[INFO] [stdout] 312 |             try!(resolver.declare(*argument));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/treewalk/parser.rs:136:10
[INFO] [stdout]     |
[INFO] [stdout] 136 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/treewalk/parser.rs:315:10
[INFO] [stdout]     |
[INFO] [stdout] 315 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/treewalk/parser.rs:385:10
[INFO] [stdout]     |
[INFO] [stdout] 385 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/parser.rs:950:9
[INFO] [stdout]     |
[INFO] [stdout] 950 |         try!(consume_expected_token!(
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/parser.rs:976:9
[INFO] [stdout]     |
[INFO] [stdout] 976 |         try!(consume_expected_token!(
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/vm/bytecode.rs:142:5
[INFO] [stdout]     |
[INFO] [stdout] 142 |     try!(writeln!(out, "== {} ==", name));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/vm/bytecode.rs:148:9
[INFO] [stdout]     |
[INFO] [stdout] 148 |         try!(write!(out, "{:04}", i));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/vm/bytecode.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |         try!(write!(out, " "));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/vm/bytecode.rs:156:9
[INFO] [stdout]     |
[INFO] [stdout] 156 |         try!{disassemble_instruction(instruction, chunk, out)};
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/vm/bytecode.rs:150:13
[INFO] [stdout]     |
[INFO] [stdout] 150 |             try!(write!(out, "   |"));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/vm/bytecode.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 |             try!(write!(out, "{:4}", line));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/frontend/scanner.rs:130:38
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn peek_check(&mut self, check: &Fn(char) -> bool) -> bool {
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn peek_check(&mut self, check: &dyn Fn(char) -> bool) -> bool {
[INFO] [stdout]     |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/frontend/scanner.rs:138:40
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn peek_check2(&mut self, check1: &Fn(char) -> bool, check2: &Fn(char) -> bool) -> bool {
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn peek_check2(&mut self, check1: &dyn Fn(char) -> bool, check2: &Fn(char) -> bool) -> bool {
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/frontend/scanner.rs:138:67
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn peek_check2(&mut self, check1: &Fn(char) -> bool, check2: &Fn(char) -> bool) -> bool {
[INFO] [stdout]     |                                                                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn peek_check2(&mut self, check1: &Fn(char) -> bool, check2: &dyn Fn(char) -> bool) -> bool {
[INFO] [stdout]     |                                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/frontend/scanner.rs:171:45
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn advance_while(&mut self, condition: &Fn(char) -> bool) -> () {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn advance_while(&mut self, condition: &dyn Fn(char) -> bool) -> () {
[INFO] [stdout]     |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/treewalk/parser.rs:170:27
[INFO] [stdout]     |
[INFO] [stdout] 170 |           parse_statement: &Fn(&mut Parser, &mut Peekable<I>)
[INFO] [stdout]     |  ___________________________^
[INFO] [stdout] 171 | |             -> Option<Result<Statement, ParseError>>,
[INFO] [stdout]     | |____________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 170 |         parse_statement: &dyn Fn(&mut Parser, &mut Peekable<I>)
[INFO] [stdout]     |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/treewalk/parser.rs:646:24
[INFO] [stdout]     |
[INFO] [stdout] 646 |         map_operator: &Fn(&Token) -> Option<LogicOperator>,
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 646 |         map_operator: &dyn Fn(&Token) -> Option<LogicOperator>,
[INFO] [stdout]     |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/treewalk/parser.rs:647:31
[INFO] [stdout]     |
[INFO] [stdout] 647 |         parse_subexpression: &Fn(&mut Parser, &mut Peekable<I>) -> Option<Result<Expr, ParseError>>,
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 647 |         parse_subexpression: &dyn Fn(&mut Parser, &mut Peekable<I>) -> Option<Result<Expr, ParseError>>,
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/treewalk/parser.rs:688:24
[INFO] [stdout]     |
[INFO] [stdout] 688 |         map_operator: &Fn(&Token) -> Option<BinaryOperator>,
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 688 |         map_operator: &dyn Fn(&Token) -> Option<BinaryOperator>,
[INFO] [stdout]     |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/treewalk/parser.rs:689:31
[INFO] [stdout]     |
[INFO] [stdout] 689 |         parse_subexpression: &Fn(&mut Parser, &mut Peekable<I>) -> Option<Result<Expr, ParseError>>,
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 689 |         parse_subexpression: &dyn Fn(&mut Parser, &mut Peekable<I>) -> Option<Result<Expr, ParseError>>,
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/treewalk/parser.rs:945:26
[INFO] [stdout]     |
[INFO] [stdout] 945 |         parse_argument: &Fn(&mut Parser, &mut Peekable<I>) -> Option<Result<A, ParseError>>,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 945 |         parse_argument: &dyn Fn(&mut Parser, &mut Peekable<I>) -> Option<Result<A, ParseError>>,
[INFO] [stdout]     |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/treewalk/mod.rs:16:16
[INFO] [stdout]    |
[INFO] [stdout] 16 |     InputError(Vec<InputError>),
[INFO] [stdout]    |     ---------- ^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LoxError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 16 -     InputError(Vec<InputError>),
[INFO] [stdout] 16 +     InputError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/treewalk/mod.rs:17:34
[INFO] [stdout]    |
[INFO] [stdout] 17 |     LexicalScopesResolutionError(Vec<LexicalScopesResolutionError>),
[INFO] [stdout]    |     ---------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LoxError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 17 -     LexicalScopesResolutionError(Vec<LexicalScopesResolutionError>),
[INFO] [stdout] 17 +     LexicalScopesResolutionError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/treewalk/mod.rs:18:18
[INFO] [stdout]    |
[INFO] [stdout] 18 |     RuntimeError(RuntimeError),
[INFO] [stdout]    |     ------------ ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LoxError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 18 -     RuntimeError(RuntimeError),
[INFO] [stdout] 18 +     RuntimeError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/treewalk/mod.rs:23:18
[INFO] [stdout]    |
[INFO] [stdout] 23 |     ScannerError(scanner::ScannerError),
[INFO] [stdout]    |     ------------ ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `InputError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 23 -     ScannerError(scanner::ScannerError),
[INFO] [stdout] 23 +     ScannerError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/treewalk/mod.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 |     ParserError(ParseError),
[INFO] [stdout]    |     ----------- ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `InputError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 24 -     ParserError(ParseError),
[INFO] [stdout] 24 +     ParserError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `lookup` is never used
[INFO] [stdout]   --> src/treewalk/ast.rs:77:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | impl IdentifierMap {
[INFO] [stdout]    | ------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 77 |     pub fn lookup(&self, identifier: Identifier) -> Option<&String> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/treewalk/interpreter.rs:291:28
[INFO] [stdout]     |
[INFO] [stdout] 291 |     UnaryMinusTypeMismatch(Value),
[INFO] [stdout]     |     ---------------------- ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 291 -     UnaryMinusTypeMismatch(Value),
[INFO] [stdout] 291 +     UnaryMinusTypeMismatch(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]    --> src/treewalk/interpreter.rs:292:32
[INFO] [stdout]     |
[INFO] [stdout] 292 |     BinaryOperatorTypeMismatch(BinaryOperator, Value, Value),
[INFO] [stdout]     |     -------------------------- ^^^^^^^^^^^^^^  ^^^^^  ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     fields in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]     |
[INFO] [stdout] 292 -     BinaryOperatorTypeMismatch(BinaryOperator, Value, Value),
[INFO] [stdout] 292 +     BinaryOperatorTypeMismatch((), (), ()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/treewalk/interpreter.rs:293:25
[INFO] [stdout]     |
[INFO] [stdout] 293 |     UndefinedIdentifier(Identifier),
[INFO] [stdout]     |     ------------------- ^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 293 -     UndefinedIdentifier(Identifier),
[INFO] [stdout] 293 +     UndefinedIdentifier(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/treewalk/interpreter.rs:294:17
[INFO] [stdout]     |
[INFO] [stdout] 294 |     NotCallable(Value),
[INFO] [stdout]     |     ----------- ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 294 -     NotCallable(Value),
[INFO] [stdout] 294 +     NotCallable(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/treewalk/interpreter.rs:295:19
[INFO] [stdout]     |
[INFO] [stdout] 295 |     NotAnInstance(Value),
[INFO] [stdout]     |     ------------- ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 295 -     NotAnInstance(Value),
[INFO] [stdout] 295 +     NotAnInstance(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/treewalk/interpreter.rs:296:15
[INFO] [stdout]     |
[INFO] [stdout] 296 |     NotAClass(Value),
[INFO] [stdout]     |     --------- ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 296 -     NotAClass(Value),
[INFO] [stdout] 296 +     NotAClass(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/treewalk/parser.rs:61:21
[INFO] [stdout]    |
[INFO] [stdout] 61 |     UnexpectedToken(Lexeme, Position),
[INFO] [stdout]    |     --------------- ^^^^^^  ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 61 -     UnexpectedToken(Lexeme, Position),
[INFO] [stdout] 61 +     UnexpectedToken((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/treewalk/parser.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 62 |     Missing(RequiredElement, Lexeme, Position),
[INFO] [stdout]    |     ------- ^^^^^^^^^^^^^^^  ^^^^^^  ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 62 -     Missing(RequiredElement, Lexeme, Position),
[INFO] [stdout] 62 +     Missing((), (), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/treewalk/parser.rs:63:29
[INFO] [stdout]    |
[INFO] [stdout] 63 |     InvalidAssignmentTarget(Lexeme, Position),
[INFO] [stdout]    |     ----------------------- ^^^^^^  ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 63 -     InvalidAssignmentTarget(Lexeme, Position),
[INFO] [stdout] 63 +     InvalidAssignmentTarget((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `PrettyPrint` is never used
[INFO] [stdout]  --> src/treewalk/pretty_printer.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait PrettyPrint {
[INFO] [stdout]   |           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/frontend/scanner.rs:122:39
[INFO] [stdout]     |
[INFO] [stdout] 122 |     fn initialize(source: &'a str) -> Scanner {
[INFO] [stdout]     |                            --         ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 122 |     fn initialize(source: &'a str) -> Scanner<'a> {
[INFO] [stdout]     |                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/vm/compiler.rs:22:33
[INFO] [stdout]    |
[INFO] [stdout] 22 | #[derive(PartialEq, PartialOrd, FromPrimitive, ToPrimitive, Clone, Copy)]
[INFO] [stdout]    |                                 ^------------
[INFO] [stdout]    |                                 |
[INFO] [stdout]    |                                 `FromPrimitive` is not local
[INFO] [stdout]    |                                 move the `impl` block outside of this constant `_IMPL_NUM_FROMPRIMITIVE_FOR_PRECEDENCE`
[INFO] [stdout] 23 | enum Precedence {
[INFO] [stdout]    |      ---------- `Precedence` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `FromPrimitive` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `FromPrimitive` may come from an old version of the `num_derive` crate, try updating your dependency with `cargo update -p num_derive`
[INFO] [stdout]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]    = note: `#[warn(non_local_definitions)]` on by default
[INFO] [stdout]    = note: this warning originates in the derive macro `FromPrimitive` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/vm/compiler.rs:22:48
[INFO] [stdout]    |
[INFO] [stdout] 22 | #[derive(PartialEq, PartialOrd, FromPrimitive, ToPrimitive, Clone, Copy)]
[INFO] [stdout]    |                                                ^----------
[INFO] [stdout]    |                                                |
[INFO] [stdout]    |                                                `ToPrimitive` is not local
[INFO] [stdout]    |                                                move the `impl` block outside of this constant `_IMPL_NUM_TOPRIMITIVE_FOR_PRECEDENCE`
[INFO] [stdout] 23 | enum Precedence {
[INFO] [stdout]    |      ---------- `Precedence` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `ToPrimitive` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `ToPrimitive` may come from an old version of the `num_derive` crate, try updating your dependency with `cargo update -p num_derive`
[INFO] [stdout]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]    = note: this warning originates in the derive macro `ToPrimitive` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/vm/compiler.rs:64:48
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn new(chunk: &'a mut Chunk, tokens: I) -> Parser<I> {
[INFO] [stdout]    |                    --                          ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is named here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn new(chunk: &'a mut Chunk, tokens: I) -> Parser<'a, I> {
[INFO] [stdout]    |                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/frontend/scanner.rs:156:58
[INFO] [stdout]     |
[INFO] [stdout] 156 |                 self.current_position.increment_column();;
[INFO] [stdout]     |                                                          ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/treewalk/interpreter.rs:94:21
[INFO] [stdout]    |
[INFO] [stdout] 94 |                     try!(
[INFO] [stdout]    |                     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]    --> src/treewalk/interpreter.rs:301:52
[INFO] [stdout]     |
[INFO] [stdout] 301 |     fn interpret(&self, environment: &Environment, &LexicalScopes) -> Result<Value, RuntimeError>;
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &LexicalScopes`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]     = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout]     = note: `#[warn(anonymous_parameters)]` (part of `#[warn(rust_2018_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:357:33
[INFO] [stdout]     |
[INFO] [stdout] 357 |                     let value = try!(s.value.interpret(environment, scopes));
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:419:21
[INFO] [stdout]     |
[INFO] [stdout] 419 |         let value = try!(self.right.interpret(environment, scopes));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:436:20
[INFO] [stdout]     |
[INFO] [stdout] 436 |         let left = try!(self.left.interpret(environment, scopes));
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:437:21
[INFO] [stdout]     |
[INFO] [stdout] 437 |         let right = try!(self.right.interpret(environment, scopes));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:488:28
[INFO] [stdout]     |
[INFO] [stdout] 488 |                 let left = try!(self.left.interpret(environment, scopes));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:496:28
[INFO] [stdout]     |
[INFO] [stdout] 496 |                 let left = try!(self.left.interpret(environment, scopes));
[INFO] [stdout]     |                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:565:34
[INFO] [stdout]     |
[INFO] [stdout] 565 |                     let result = try!(statement.execute(&environment, scopes));
[INFO] [stdout]     |                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:573:33
[INFO] [stdout]     |
[INFO] [stdout] 573 |                 let condition = try!{c.condition.interpret(environment, scopes)
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:582:33
[INFO] [stdout]     |
[INFO] [stdout] 582 |                 let condition = try!{c.condition.interpret(environment, scopes)
[INFO] [stdout]     |                                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:591:23
[INFO] [stdout]     |
[INFO] [stdout] 591 |                 while try!{l.condition.interpret(environment, scopes)
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:594:21
[INFO] [stdout]     |
[INFO] [stdout] 594 |                     try!{l.body.execute(environment, scopes)};
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/interpreter.rs:610:37
[INFO] [stdout]     |
[INFO] [stdout] 610 |                         let value = try!(superclass.interpret(environment, scopes));
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]     --> src/treewalk/interpreter.rs:1040:10
[INFO] [stdout]      |
[INFO] [stdout] 1040 |         };
[INFO] [stdout]      |          ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: anonymous parameters are deprecated and will be removed in the next edition
[INFO] [stdout]   --> src/treewalk/lexical_scope_resolver.rs:35:23
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn resolve(&self, &mut LexicalScopesResolver) -> Result<(), LexicalScopesResolutionError>;
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try naming the parameter or explicitly ignoring it: `_: &mut LexicalScopesResolver`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
[INFO] [stdout]    = note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:149:21
[INFO] [stdout]     |
[INFO] [stdout] 149 |                     try!(statement.resolve(resolver));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:155:17
[INFO] [stdout]     |
[INFO] [stdout] 155 |                 try!(resolver.declare(*identifier));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:160:17
[INFO] [stdout]     |
[INFO] [stdout] 160 |                 try!(resolver.declare(*identifier));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:161:17
[INFO] [stdout]     |
[INFO] [stdout] 161 |                 try!(initializer.resolve(resolver));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:167:17
[INFO] [stdout]     |
[INFO] [stdout] 167 |                 try!(resolver.declare(c.name));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:173:21
[INFO] [stdout]     |
[INFO] [stdout] 173 |                     try!(superclass.resolve(resolver));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:180:21
[INFO] [stdout]     |
[INFO] [stdout] 180 |                     try!(method.resolve(resolver));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:270:17
[INFO] [stdout]     |
[INFO] [stdout] 270 |                 try!(e.callee.resolve(resolver));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:272:21
[INFO] [stdout]     |
[INFO] [stdout] 272 |                     try!(argument.resolve(resolver));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:277:17
[INFO] [stdout]     |
[INFO] [stdout] 277 |                 try!(g.instance.resolve(resolver));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:281:17
[INFO] [stdout]     |
[INFO] [stdout] 281 |                 try!(s.value.resolve(resolver));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:282:17
[INFO] [stdout]     |
[INFO] [stdout] 282 |                 try!(s.instance.resolve(resolver));
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:294:9
[INFO] [stdout]     |
[INFO] [stdout] 294 |         try!{self.rvalue.resolve(resolver)};
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:306:9
[INFO] [stdout]     |
[INFO] [stdout] 306 |         try!(resolver.declare(self.name));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |         try!(self.body.resolve(resolver));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/lexical_scope_resolver.rs:312:13
[INFO] [stdout]     |
[INFO] [stdout] 312 |             try!(resolver.declare(*argument));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/treewalk/parser.rs:136:10
[INFO] [stdout]     |
[INFO] [stdout] 136 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/treewalk/parser.rs:315:10
[INFO] [stdout]     |
[INFO] [stdout] 315 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/treewalk/parser.rs:385:10
[INFO] [stdout]     |
[INFO] [stdout] 385 |         };
[INFO] [stdout]     |          ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/parser.rs:950:9
[INFO] [stdout]     |
[INFO] [stdout] 950 |         try!(consume_expected_token!(
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/treewalk/parser.rs:976:9
[INFO] [stdout]     |
[INFO] [stdout] 976 |         try!(consume_expected_token!(
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/vm/bytecode.rs:142:5
[INFO] [stdout]     |
[INFO] [stdout] 142 |     try!(writeln!(out, "== {} ==", name));
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/vm/bytecode.rs:148:9
[INFO] [stdout]     |
[INFO] [stdout] 148 |         try!(write!(out, "{:04}", i));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/vm/bytecode.rs:155:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |         try!(write!(out, " "));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/vm/bytecode.rs:156:9
[INFO] [stdout]     |
[INFO] [stdout] 156 |         try!{disassemble_instruction(instruction, chunk, out)};
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/vm/bytecode.rs:150:13
[INFO] [stdout]     |
[INFO] [stdout] 150 |             try!(write!(out, "   |"));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/vm/bytecode.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 |             try!(write!(out, "{:4}", line));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/frontend/scanner.rs:130:38
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn peek_check(&mut self, check: &Fn(char) -> bool) -> bool {
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 130 |     fn peek_check(&mut self, check: &dyn Fn(char) -> bool) -> bool {
[INFO] [stdout]     |                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/frontend/scanner.rs:138:40
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn peek_check2(&mut self, check1: &Fn(char) -> bool, check2: &Fn(char) -> bool) -> bool {
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn peek_check2(&mut self, check1: &dyn Fn(char) -> bool, check2: &Fn(char) -> bool) -> bool {
[INFO] [stdout]     |                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/frontend/scanner.rs:138:67
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn peek_check2(&mut self, check1: &Fn(char) -> bool, check2: &Fn(char) -> bool) -> bool {
[INFO] [stdout]     |                                                                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 138 |     fn peek_check2(&mut self, check1: &Fn(char) -> bool, check2: &dyn Fn(char) -> bool) -> bool {
[INFO] [stdout]     |                                                                   +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/frontend/scanner.rs:171:45
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn advance_while(&mut self, condition: &Fn(char) -> bool) -> () {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn advance_while(&mut self, condition: &dyn Fn(char) -> bool) -> () {
[INFO] [stdout]     |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/treewalk/parser.rs:170:27
[INFO] [stdout]     |
[INFO] [stdout] 170 |           parse_statement: &Fn(&mut Parser, &mut Peekable<I>)
[INFO] [stdout]     |  ___________________________^
[INFO] [stdout] 171 | |             -> Option<Result<Statement, ParseError>>,
[INFO] [stdout]     | |____________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 170 |         parse_statement: &dyn Fn(&mut Parser, &mut Peekable<I>)
[INFO] [stdout]     |                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/treewalk/parser.rs:646:24
[INFO] [stdout]     |
[INFO] [stdout] 646 |         map_operator: &Fn(&Token) -> Option<LogicOperator>,
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 646 |         map_operator: &dyn Fn(&Token) -> Option<LogicOperator>,
[INFO] [stdout]     |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/treewalk/parser.rs:647:31
[INFO] [stdout]     |
[INFO] [stdout] 647 |         parse_subexpression: &Fn(&mut Parser, &mut Peekable<I>) -> Option<Result<Expr, ParseError>>,
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 647 |         parse_subexpression: &dyn Fn(&mut Parser, &mut Peekable<I>) -> Option<Result<Expr, ParseError>>,
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/treewalk/parser.rs:688:24
[INFO] [stdout]     |
[INFO] [stdout] 688 |         map_operator: &Fn(&Token) -> Option<BinaryOperator>,
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 688 |         map_operator: &dyn Fn(&Token) -> Option<BinaryOperator>,
[INFO] [stdout]     |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/treewalk/parser.rs:689:31
[INFO] [stdout]     |
[INFO] [stdout] 689 |         parse_subexpression: &Fn(&mut Parser, &mut Peekable<I>) -> Option<Result<Expr, ParseError>>,
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 689 |         parse_subexpression: &dyn Fn(&mut Parser, &mut Peekable<I>) -> Option<Result<Expr, ParseError>>,
[INFO] [stdout]     |                               +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/treewalk/parser.rs:945:26
[INFO] [stdout]     |
[INFO] [stdout] 945 |         parse_argument: &Fn(&mut Parser, &mut Peekable<I>) -> Option<Result<A, ParseError>>,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 945 |         parse_argument: &dyn Fn(&mut Parser, &mut Peekable<I>) -> Option<Result<A, ParseError>>,
[INFO] [stdout]     |                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/treewalk/mod.rs:16:16
[INFO] [stdout]    |
[INFO] [stdout] 16 |     InputError(Vec<InputError>),
[INFO] [stdout]    |     ---------- ^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LoxError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 16 -     InputError(Vec<InputError>),
[INFO] [stdout] 16 +     InputError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/treewalk/mod.rs:17:34
[INFO] [stdout]    |
[INFO] [stdout] 17 |     LexicalScopesResolutionError(Vec<LexicalScopesResolutionError>),
[INFO] [stdout]    |     ---------------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LoxError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 17 -     LexicalScopesResolutionError(Vec<LexicalScopesResolutionError>),
[INFO] [stdout] 17 +     LexicalScopesResolutionError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/treewalk/mod.rs:18:18
[INFO] [stdout]    |
[INFO] [stdout] 18 |     RuntimeError(RuntimeError),
[INFO] [stdout]    |     ------------ ^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `LoxError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 18 -     RuntimeError(RuntimeError),
[INFO] [stdout] 18 +     RuntimeError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/treewalk/mod.rs:23:18
[INFO] [stdout]    |
[INFO] [stdout] 23 |     ScannerError(scanner::ScannerError),
[INFO] [stdout]    |     ------------ ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `InputError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 23 -     ScannerError(scanner::ScannerError),
[INFO] [stdout] 23 +     ScannerError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/treewalk/mod.rs:24:17
[INFO] [stdout]    |
[INFO] [stdout] 24 |     ParserError(ParseError),
[INFO] [stdout]    |     ----------- ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `InputError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 24 -     ParserError(ParseError),
[INFO] [stdout] 24 +     ParserError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/treewalk/interpreter.rs:291:28
[INFO] [stdout]     |
[INFO] [stdout] 291 |     UnaryMinusTypeMismatch(Value),
[INFO] [stdout]     |     ---------------------- ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 291 -     UnaryMinusTypeMismatch(Value),
[INFO] [stdout] 291 +     UnaryMinusTypeMismatch(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]    --> src/treewalk/interpreter.rs:292:32
[INFO] [stdout]     |
[INFO] [stdout] 292 |     BinaryOperatorTypeMismatch(BinaryOperator, Value, Value),
[INFO] [stdout]     |     -------------------------- ^^^^^^^^^^^^^^  ^^^^^  ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     fields in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]     |
[INFO] [stdout] 292 -     BinaryOperatorTypeMismatch(BinaryOperator, Value, Value),
[INFO] [stdout] 292 +     BinaryOperatorTypeMismatch((), (), ()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/treewalk/interpreter.rs:293:25
[INFO] [stdout]     |
[INFO] [stdout] 293 |     UndefinedIdentifier(Identifier),
[INFO] [stdout]     |     ------------------- ^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 293 -     UndefinedIdentifier(Identifier),
[INFO] [stdout] 293 +     UndefinedIdentifier(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/treewalk/interpreter.rs:294:17
[INFO] [stdout]     |
[INFO] [stdout] 294 |     NotCallable(Value),
[INFO] [stdout]     |     ----------- ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 294 -     NotCallable(Value),
[INFO] [stdout] 294 +     NotCallable(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/treewalk/interpreter.rs:295:19
[INFO] [stdout]     |
[INFO] [stdout] 295 |     NotAnInstance(Value),
[INFO] [stdout]     |     ------------- ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 295 -     NotAnInstance(Value),
[INFO] [stdout] 295 +     NotAnInstance(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/treewalk/interpreter.rs:296:15
[INFO] [stdout]     |
[INFO] [stdout] 296 |     NotAClass(Value),
[INFO] [stdout]     |     --------- ^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `RuntimeError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 296 -     NotAClass(Value),
[INFO] [stdout] 296 +     NotAClass(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/treewalk/parser.rs:61:21
[INFO] [stdout]    |
[INFO] [stdout] 61 |     UnexpectedToken(Lexeme, Position),
[INFO] [stdout]    |     --------------- ^^^^^^  ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 61 -     UnexpectedToken(Lexeme, Position),
[INFO] [stdout] 61 +     UnexpectedToken((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/treewalk/parser.rs:62:13
[INFO] [stdout]    |
[INFO] [stdout] 62 |     Missing(RequiredElement, Lexeme, Position),
[INFO] [stdout]    |     ------- ^^^^^^^^^^^^^^^  ^^^^^^  ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 62 -     Missing(RequiredElement, Lexeme, Position),
[INFO] [stdout] 62 +     Missing((), (), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/treewalk/parser.rs:63:29
[INFO] [stdout]    |
[INFO] [stdout] 63 |     InvalidAssignmentTarget(Lexeme, Position),
[INFO] [stdout]    |     ----------------------- ^^^^^^  ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 63 -     InvalidAssignmentTarget(Lexeme, Position),
[INFO] [stdout] 63 +     InvalidAssignmentTarget((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/frontend/scanner.rs:122:39
[INFO] [stdout]     |
[INFO] [stdout] 122 |     fn initialize(source: &'a str) -> Scanner {
[INFO] [stdout]     |                            --         ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                            |
[INFO] [stdout]     |                            the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 122 |     fn initialize(source: &'a str) -> Scanner<'a> {
[INFO] [stdout]     |                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/treewalk/mod.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         lox_vm.run(input)
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let _ = lox_vm.run(input);
[INFO] [stdout]     |         +++++++                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/vm/compiler.rs:22:33
[INFO] [stdout]    |
[INFO] [stdout] 22 | #[derive(PartialEq, PartialOrd, FromPrimitive, ToPrimitive, Clone, Copy)]
[INFO] [stdout]    |                                 ^------------
[INFO] [stdout]    |                                 |
[INFO] [stdout]    |                                 `FromPrimitive` is not local
[INFO] [stdout]    |                                 move the `impl` block outside of this constant `_IMPL_NUM_FROMPRIMITIVE_FOR_PRECEDENCE`
[INFO] [stdout] 23 | enum Precedence {
[INFO] [stdout]    |      ---------- `Precedence` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `FromPrimitive` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `FromPrimitive` may come from an old version of the `num_derive` crate, try updating your dependency with `cargo update -p num_derive`
[INFO] [stdout]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]    = note: `#[warn(non_local_definitions)]` on by default
[INFO] [stdout]    = note: this warning originates in the derive macro `FromPrimitive` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: non-local `impl` definition, `impl` blocks should be written at the same level as their item
[INFO] [stdout]   --> src/vm/compiler.rs:22:48
[INFO] [stdout]    |
[INFO] [stdout] 22 | #[derive(PartialEq, PartialOrd, FromPrimitive, ToPrimitive, Clone, Copy)]
[INFO] [stdout]    |                                                ^----------
[INFO] [stdout]    |                                                |
[INFO] [stdout]    |                                                `ToPrimitive` is not local
[INFO] [stdout]    |                                                move the `impl` block outside of this constant `_IMPL_NUM_TOPRIMITIVE_FOR_PRECEDENCE`
[INFO] [stdout] 23 | enum Precedence {
[INFO] [stdout]    |      ---------- `Precedence` is not local
[INFO] [stdout]    |
[INFO] [stdout]    = note: the derive macro `ToPrimitive` defines the non-local `impl`, and may need to be changed
[INFO] [stdout]    = note: the derive macro `ToPrimitive` may come from an old version of the `num_derive` crate, try updating your dependency with `cargo update -p num_derive`
[INFO] [stdout]    = note: an `impl` is never scoped, even when it is nested inside an item, as it may impact type checking outside of that item, which can be the case if neither the trait or the self type are at the same nesting level as the `impl`
[INFO] [stdout]    = note: items in an anonymous const item (`const _: () = { ... }`) are treated as in the same scope as the anonymous const's declaration for the purpose of this lint
[INFO] [stdout]    = note: this warning originates in the derive macro `ToPrimitive` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/vm/compiler.rs:64:48
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn new(chunk: &'a mut Chunk, tokens: I) -> Parser<I> {
[INFO] [stdout]    |                    --                          ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is named here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn new(chunk: &'a mut Chunk, tokens: I) -> Parser<'a, I> {
[INFO] [stdout]    |                                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/vm/mod.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |         lox_vm.run(input)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let _ = lox_vm.run(input);
[INFO] [stdout]    |         +++++++                  +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.68s
[INFO] running `Command { std: "docker" "inspect" "b9b91309ebc878829fb4a94f0beea1b5021f08f856359a283c5cea3b4e4e9f07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9b91309ebc878829fb4a94f0beea1b5021f08f856359a283c5cea3b4e4e9f07", kill_on_drop: false }`
[INFO] [stdout] b9b91309ebc878829fb4a94f0beea1b5021f08f856359a283c5cea3b4e4e9f07
