[INFO] cloning repository https://github.com/ThomasBollmeier/rlox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ThomasBollmeier/rlox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThomasBollmeier%2Frlox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThomasBollmeier%2Frlox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8d5411b52d794b1cca132a4b6bb359be8bf6a639
[INFO] linting ThomasBollmeier/rlox against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThomasBollmeier%2Frlox" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/ThomasBollmeier/rlox
[INFO] finished tweaking git repo https://github.com/ThomasBollmeier/rlox
[INFO] tweaked toml for git repo https://github.com/ThomasBollmeier/rlox written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ThomasBollmeier/rlox on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ThomasBollmeier/rlox already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 84c5f315080c05fdabe17f0274400dbff8395acd99fca0ee99eadeec8505daaf
[INFO] running `Command { std: "docker" "start" "-a" "84c5f315080c05fdabe17f0274400dbff8395acd99fca0ee99eadeec8505daaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "84c5f315080c05fdabe17f0274400dbff8395acd99fca0ee99eadeec8505daaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84c5f315080c05fdabe17f0274400dbff8395acd99fca0ee99eadeec8505daaf", kill_on_drop: false }`
[INFO] [stdout] 84c5f315080c05fdabe17f0274400dbff8395acd99fca0ee99eadeec8505daaf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f9bd95f5cd51cd45e59afca5c78f318152319048de7e9758925521aba7b00ff
[INFO] running `Command { std: "docker" "start" "-a" "0f9bd95f5cd51cd45e59afca5c78f318152319048de7e9758925521aba7b00ff", kill_on_drop: false }`
[INFO] [stderr]     Checking rlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unneeded unit expression
[INFO] [stdout]   --> src/frontend/interpreter.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |                 ()
[INFO] [stdout]    |                 ^^ help: remove the final `()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stdout]    = note: `#[warn(clippy::unused_unit)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `trace_run`
[INFO] [stdout]    --> src/backend/vm.rs:118:21
[INFO] [stdout]     |
[INFO] [stdout] 118 |             if cfg!(trace_run) {
[INFO] [stdout]     |                     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(trace_run)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(trace_run)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded unit expression
[INFO] [stdout]   --> src/frontend/interpreter.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |                 ()
[INFO] [stdout]    |                 ^^ help: remove the final `()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stdout]    = note: `#[warn(clippy::unused_unit)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition name: `trace_run`
[INFO] [stdout]    --> src/backend/vm.rs:118:21
[INFO] [stdout]     |
[INFO] [stdout] 118 |             if cfg!(trace_run) {
[INFO] [stdout]     |                     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(trace_run)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(trace_run)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/frontend/scanner.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 | /         loop {
[INFO] [stdout] 111 | |             if let Some(ch) = self.peek(0) {
[INFO] [stdout] 112 | |                 if ch.is_alphanumeric() || ch == '_' {
[INFO] [stdout] 113 | |                     self.current_lexeme.push(ch);
[INFO] [stdout] ...   |
[INFO] [stdout] 121 | |         }
[INFO] [stdout]     | |_________^ help: try: `while let Some(ch) = self.peek(0) { .. }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout]     = note: `#[warn(clippy::while_let_loop)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `TokenType` which implements the `Copy` trait
[INFO] [stdout]    --> src/frontend/scanner.rs:129:13
[INFO] [stdout]     |
[INFO] [stdout] 129 |             token_type.clone(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*token_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout]     = note: `#[warn(clippy::clone_on_copy)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/frontend/scanner.rs:190:9
[INFO] [stdout]     |
[INFO] [stdout] 190 | /         return Token::new(
[INFO] [stdout] 191 | |             TokenType::Number,
[INFO] [stdout] 192 | |             self.current_lexeme.clone(),
[INFO] [stdout] 193 | |             self.current_line)
[INFO] [stdout]     | |______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]     = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 190 ~         Token::new(
[INFO] [stdout] 191 +             TokenType::Number,
[INFO] [stdout] 192 +             self.current_lexeme.clone(),
[INFO] [stdout] 193 +             self.current_line)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/frontend/scanner.rs:136:9
[INFO] [stdout]     |
[INFO] [stdout] 136 | /         loop {
[INFO] [stdout] 137 | |             if let Some(ch) = self.peek(0) {
[INFO] [stdout] 138 | |                 if ch.is_numeric() {
[INFO] [stdout] 139 | |                     self.current_lexeme.push(ch);
[INFO] [stdout] ...   |
[INFO] [stdout] 150 | |         }
[INFO] [stdout]     | |_________^ help: try: `while let Some(ch) = self.peek(0) { .. }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/frontend/scanner.rs:110:9
[INFO] [stdout]     |
[INFO] [stdout] 110 | /         loop {
[INFO] [stdout] 111 | |             if let Some(ch) = self.peek(0) {
[INFO] [stdout] 112 | |                 if ch.is_alphanumeric() || ch == '_' {
[INFO] [stdout] 113 | |                     self.current_lexeme.push(ch);
[INFO] [stdout] ...   |
[INFO] [stdout] 121 | |         }
[INFO] [stdout]     | |_________^ help: try: `while let Some(ch) = self.peek(0) { .. }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout]     = note: `#[warn(clippy::while_let_loop)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/frontend/scanner.rs:177:9
[INFO] [stdout]     |
[INFO] [stdout] 177 | /         loop {
[INFO] [stdout] 178 | |             if let Some(ch) = self.peek(0) {
[INFO] [stdout] 179 | |                 if ch.is_numeric() {
[INFO] [stdout] 180 | |                     self.current_lexeme.push(ch);
[INFO] [stdout] ...   |
[INFO] [stdout] 188 | |         }
[INFO] [stdout]     | |_________^ help: try: `while let Some(ch) = self.peek(0) { .. }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/frontend/scanner.rs:279:9
[INFO] [stdout]     |
[INFO] [stdout] 279 | /         loop {
[INFO] [stdout] 280 | |             if let Some(ch) = self.peek(0) {
[INFO] [stdout] 281 | |                 if ch != '\n' {
[INFO] [stdout] 282 | |                     self.advance();
[INFO] [stdout] ...   |
[INFO] [stdout] 289 | |         }
[INFO] [stdout]     | |_________^ help: try: `while let Some(ch) = self.peek(0) { .. }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `TokenType` which implements the `Copy` trait
[INFO] [stdout]    --> src/frontend/scanner.rs:129:13
[INFO] [stdout]     |
[INFO] [stdout] 129 |             token_type.clone(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*token_type`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout]     = note: `#[warn(clippy::clone_on_copy)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/frontend/scanner.rs:190:9
[INFO] [stdout]     |
[INFO] [stdout] 190 | /         return Token::new(
[INFO] [stdout] 191 | |             TokenType::Number,
[INFO] [stdout] 192 | |             self.current_lexeme.clone(),
[INFO] [stdout] 193 | |             self.current_line)
[INFO] [stdout]     | |______________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]     = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 190 ~         Token::new(
[INFO] [stdout] 191 +             TokenType::Number,
[INFO] [stdout] 192 +             self.current_lexeme.clone(),
[INFO] [stdout] 193 +             self.current_line)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/frontend/scanner.rs:136:9
[INFO] [stdout]     |
[INFO] [stdout] 136 | /         loop {
[INFO] [stdout] 137 | |             if let Some(ch) = self.peek(0) {
[INFO] [stdout] 138 | |                 if ch.is_numeric() {
[INFO] [stdout] 139 | |                     self.current_lexeme.push(ch);
[INFO] [stdout] ...   |
[INFO] [stdout] 150 | |         }
[INFO] [stdout]     | |_________^ help: try: `while let Some(ch) = self.peek(0) { .. }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/frontend/scanner.rs:177:9
[INFO] [stdout]     |
[INFO] [stdout] 177 | /         loop {
[INFO] [stdout] 178 | |             if let Some(ch) = self.peek(0) {
[INFO] [stdout] 179 | |                 if ch.is_numeric() {
[INFO] [stdout] 180 | |                     self.current_lexeme.push(ch);
[INFO] [stdout] ...   |
[INFO] [stdout] 188 | |         }
[INFO] [stdout]     | |_________^ help: try: `while let Some(ch) = self.peek(0) { .. }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this loop could be written as a `while let` loop
[INFO] [stdout]    --> src/frontend/scanner.rs:279:9
[INFO] [stdout]     |
[INFO] [stdout] 279 | /         loop {
[INFO] [stdout] 280 | |             if let Some(ch) = self.peek(0) {
[INFO] [stdout] 281 | |                 if ch != '\n' {
[INFO] [stdout] 282 | |                     self.advance();
[INFO] [stdout] ...   |
[INFO] [stdout] 289 | |         }
[INFO] [stdout]     | |_________^ help: try: `while let Some(ch) = self.peek(0) { .. }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#while_let_loop
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/frontend/compiler.rs:278:12
[INFO] [stdout]     |
[INFO] [stdout] 278 |         if !idx_opt.is_none() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^ help: try: `idx_opt.is_some()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/frontend/compiler.rs:278:12
[INFO] [stdout]     |
[INFO] [stdout] 278 |         if !idx_opt.is_none() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^ help: try: `idx_opt.is_some()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]     = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/frontend/compiler.rs:349:12
[INFO] [stdout]     |
[INFO] [stdout] 349 |         if !idx_opt.is_none() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^ help: try: `idx_opt.is_some()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]    --> src/frontend/compiler.rs:349:12
[INFO] [stdout]     |
[INFO] [stdout] 349 |         if !idx_opt.is_none() {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^ help: try: `idx_opt.is_some()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `jump_opt` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:525:45
[INFO] [stdout]     |
[INFO] [stdout] 523 |         if jump_opt.is_some() {
[INFO] [stdout]     |         --------------------- help: try: `if let Some(<item>) = jump_opt`
[INFO] [stdout] 524 |             let body = chunk.size();
[INFO] [stdout] 525 |             self.update_forward_jump(chunk, jump_opt.unwrap(), body);
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout]     = note: `#[warn(clippy::unnecessary_unwrap)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `incr_opt` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:531:13
[INFO] [stdout]     |
[INFO] [stdout] 530 |         let jump_target = if incr_opt.is_some() {
[INFO] [stdout]     |                           --------------------- help: try: `if let Some(<item>) = incr_opt`
[INFO] [stdout] 531 |             incr_opt.unwrap()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `cond_false_opt` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:542:30
[INFO] [stdout]     |
[INFO] [stdout] 540 |         if cond_false_opt.is_some() {
[INFO] [stdout]     |         --------------------------- help: try: `if let Some(<item>) = cond_false_opt`
[INFO] [stdout] 541 |             let after_loop = chunk.size();
[INFO] [stdout] 542 |             let cond_false = cond_false_opt.unwrap();
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `jump_opt` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:525:45
[INFO] [stdout]     |
[INFO] [stdout] 523 |         if jump_opt.is_some() {
[INFO] [stdout]     |         --------------------- help: try: `if let Some(<item>) = jump_opt`
[INFO] [stdout] 524 |             let body = chunk.size();
[INFO] [stdout] 525 |             self.update_forward_jump(chunk, jump_opt.unwrap(), body);
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout]     = note: `#[warn(clippy::unnecessary_unwrap)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `incr_opt` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:531:13
[INFO] [stdout]     |
[INFO] [stdout] 530 |         let jump_target = if incr_opt.is_some() {
[INFO] [stdout]     |                           --------------------- help: try: `if let Some(<item>) = incr_opt`
[INFO] [stdout] 531 |             incr_opt.unwrap()
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `cond_false_opt` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:542:30
[INFO] [stdout]     |
[INFO] [stdout] 540 |         if cond_false_opt.is_some() {
[INFO] [stdout]     |         --------------------------- help: try: `if let Some(<item>) = cond_false_opt`
[INFO] [stdout] 541 |             let after_loop = chunk.size();
[INFO] [stdout] 542 |             let cond_false = cond_false_opt.unwrap();
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `check_eq_opt` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:652:32
[INFO] [stdout]     |
[INFO] [stdout] 651 |                 if check_eq_opt.is_some() {
[INFO] [stdout]     |                 ------------------------- help: try: `if let Some(<item>) = check_eq_opt`
[INFO] [stdout] 652 |                     let from = check_eq_opt.unwrap();
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `check_eq_opt` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:690:24
[INFO] [stdout]     |
[INFO] [stdout] 689 |         if check_eq_opt.is_some() {
[INFO] [stdout]     |         ------------------------- help: try: `if let Some(<item>) = check_eq_opt`
[INFO] [stdout] 690 |             let from = check_eq_opt.unwrap();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `check_eq_opt` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:652:32
[INFO] [stdout]     |
[INFO] [stdout] 651 |                 if check_eq_opt.is_some() {
[INFO] [stdout]     |                 ------------------------- help: try: `if let Some(<item>) = check_eq_opt`
[INFO] [stdout] 652 |                     let from = check_eq_opt.unwrap();
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `check_eq_opt` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:690:24
[INFO] [stdout]     |
[INFO] [stdout] 689 |         if check_eq_opt.is_some() {
[INFO] [stdout]     |         ------------------------- help: try: `if let Some(<item>) = check_eq_opt`
[INFO] [stdout] 690 |             let from = check_eq_opt.unwrap();
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `last_loop` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:827:29
[INFO] [stdout]     |
[INFO] [stdout] 826 |         if last_loop.is_some() {
[INFO] [stdout]     |         ---------------------- help: try: `if let Some(<item>) = last_loop`
[INFO] [stdout] 827 |             let loop_data = last_loop.unwrap().clone();
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `local_idx` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:898:59
[INFO] [stdout]     |
[INFO] [stdout] 896 |                 if local_idx.is_some() {
[INFO] [stdout]     |                 ---------------------- help: try: `if let Some(<item>) = local_idx`
[INFO] [stdout] 897 |                     self.emit_instruction(chunk, 
[INFO] [stdout] 898 |                         Instruction::GetLocal {local_idx: local_idx.unwrap() });
[INFO] [stdout]     |                                                           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `local_idx` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:907:59
[INFO] [stdout]     |
[INFO] [stdout] 905 |                 if local_idx.is_some() {
[INFO] [stdout]     |                 ---------------------- help: try: `if let Some(<item>) = local_idx`
[INFO] [stdout] 906 |                     self.emit_instruction(chunk, 
[INFO] [stdout] 907 |                         Instruction::SetLocal {local_idx: local_idx.unwrap() });
[INFO] [stdout]     |                                                           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `last_loop` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:827:29
[INFO] [stdout]     |
[INFO] [stdout] 826 |         if last_loop.is_some() {
[INFO] [stdout]     |         ---------------------- help: try: `if let Some(<item>) = last_loop`
[INFO] [stdout] 827 |             let loop_data = last_loop.unwrap().clone();
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `local_idx` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:898:59
[INFO] [stdout]     |
[INFO] [stdout] 896 |                 if local_idx.is_some() {
[INFO] [stdout]     |                 ---------------------- help: try: `if let Some(<item>) = local_idx`
[INFO] [stdout] 897 |                     self.emit_instruction(chunk, 
[INFO] [stdout] 898 |                         Instruction::GetLocal {local_idx: local_idx.unwrap() });
[INFO] [stdout]     |                                                           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `local_idx` after checking its variant with `is_some`
[INFO] [stdout]    --> src/frontend/compiler.rs:907:59
[INFO] [stdout]     |
[INFO] [stdout] 905 |                 if local_idx.is_some() {
[INFO] [stdout]     |                 ---------------------- help: try: `if let Some(<item>) = local_idx`
[INFO] [stdout] 906 |                     self.emit_instruction(chunk, 
[INFO] [stdout] 907 |                         Instruction::SetLocal {local_idx: local_idx.unwrap() });
[INFO] [stdout]     |                                                           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this if-then-else expression returns a bool literal
[INFO] [stdout]     --> src/frontend/compiler.rs:1097:13
[INFO] [stdout]      |
[INFO] [stdout] 1097 | /             if current.get_token_type() == expected_type {
[INFO] [stdout] 1098 | |                 true
[INFO] [stdout] 1099 | |             } else {
[INFO] [stdout] 1100 | |                 false
[INFO] [stdout] 1101 | |             }
[INFO] [stdout]      | |_____________^ help: you can reduce it to: `current.get_token_type() == expected_type`
[INFO] [stdout]      |
[INFO] [stdout]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_bool
[INFO] [stdout]      = note: `#[warn(clippy::needless_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this if-then-else expression returns a bool literal
[INFO] [stdout]     --> src/frontend/compiler.rs:1097:13
[INFO] [stdout]      |
[INFO] [stdout] 1097 | /             if current.get_token_type() == expected_type {
[INFO] [stdout] 1098 | |                 true
[INFO] [stdout] 1099 | |             } else {
[INFO] [stdout] 1100 | |                 false
[INFO] [stdout] 1101 | |             }
[INFO] [stdout]      | |_____________^ help: you can reduce it to: `current.get_token_type() == expected_type`
[INFO] [stdout]      |
[INFO] [stdout]      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_bool
[INFO] [stdout]      = note: `#[warn(clippy::needless_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Precedence` which implements the `Copy` trait
[INFO] [stdout]   --> src/frontend/parse_rules.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |             self.clone()
[INFO] [stdout]    |             ^^^^^^^^^^^^ help: try dereferencing it: `*self`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `ParseRules`
[INFO] [stdout]   --> src/frontend/parse_rules.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 | /     pub fn new() -> ParseRules {
[INFO] [stdout] 72 | |         ParseRules { rules: HashMap::new() }
[INFO] [stdout] 73 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout]    = note: `#[warn(clippy::new_without_default)]` on by default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout] 69 + impl Default for ParseRules {
[INFO] [stdout] 70 +     fn default() -> Self {
[INFO] [stdout] 71 +         Self::new()
[INFO] [stdout] 72 +     }
[INFO] [stdout] 73 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Precedence` which implements the `Copy` trait
[INFO] [stdout]   --> src/frontend/parse_rules.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |             self.clone()
[INFO] [stdout]    |             ^^^^^^^^^^^^ help: try dereferencing it: `*self`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `ParseRules`
[INFO] [stdout]   --> src/frontend/parse_rules.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 | /     pub fn new() -> ParseRules {
[INFO] [stdout] 72 | |         ParseRules { rules: HashMap::new() }
[INFO] [stdout] 73 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout]    = note: `#[warn(clippy::new_without_default)]` on by default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout] 69 + impl Default for ParseRules {
[INFO] [stdout] 70 +     fn default() -> Self {
[INFO] [stdout] 71 +         Self::new()
[INFO] [stdout] 72 +     }
[INFO] [stdout] 73 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `Chunk`
[INFO] [stdout]   --> src/backend/chunk.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     pub fn new() -> Chunk {
[INFO] [stdout] 16 | |         Chunk::new_with_capacity(0)
[INFO] [stdout] 17 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout] 13 + impl Default for Chunk {
[INFO] [stdout] 14 +     fn default() -> Self {
[INFO] [stdout] 15 +         Self::new()
[INFO] [stdout] 16 +     }
[INFO] [stdout] 17 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `Chunk`
[INFO] [stdout]   --> src/backend/chunk.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     pub fn new() -> Chunk {
[INFO] [stdout] 16 | |         Chunk::new_with_capacity(0)
[INFO] [stdout] 17 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout] 13 + impl Default for Chunk {
[INFO] [stdout] 14 +     fn default() -> Self {
[INFO] [stdout] 15 +         Self::new()
[INFO] [stdout] 16 +     }
[INFO] [stdout] 17 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this block may be rewritten with the `?` operator
[INFO] [stdout]    --> src/backend/chunk.rs:184:9
[INFO] [stdout]     |
[INFO] [stdout] 184 | /         if op_code_opt.is_none() {
[INFO] [stdout] 185 | |             return None;
[INFO] [stdout] 186 | |         }
[INFO] [stdout]     | |_________^ help: replace it with: `op_code_opt?;`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#question_mark
[INFO] [stdout]     = note: `#[warn(clippy::question_mark)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `u8` which implements the `Copy` trait
[INFO] [stdout]    --> src/backend/chunk.rs:188:23
[INFO] [stdout]     |
[INFO] [stdout] 188 |         let op_code = op_code_opt.unwrap().clone();
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*op_code_opt.unwrap()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/backend/chunk.rs:199:17
[INFO] [stdout]     |
[INFO] [stdout] 199 | /                 match value_idx_opt {
[INFO] [stdout] 200 | |                     Some(value_idx) => 
[INFO] [stdout] 201 | |                         Some((Instruction::Constant { value_idx: value_idx.clone() }, next_offset)),
[INFO] [stdout] 202 | |                     None => None
[INFO] [stdout] 203 | |                 }
[INFO] [stdout]     | |_________________^ help: try: `value_idx_opt.map(|value_idx| (Instruction::Constant { value_idx: value_idx.clone() }, next_offset))`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout]     = note: `#[warn(clippy::manual_map)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `u8` which implements the `Copy` trait
[INFO] [stdout]    --> src/backend/chunk.rs:201:66
[INFO] [stdout]     |
[INFO] [stdout] 201 |                         Some((Instruction::Constant { value_idx: value_idx.clone() }, next_offset)),
[INFO] [stdout]     |                                                                  ^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*value_idx`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `u32` which implements the `Copy` trait
[INFO] [stdout]    --> src/backend/chunk.rs:208:62
[INFO] [stdout]     |
[INFO] [stdout] 208 |                 Some((Instruction::ConstantLong { value_idx: value_idx.clone() }, 
[INFO] [stdout]     |                                                              ^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `value_idx`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this block may be rewritten with the `?` operator
[INFO] [stdout]    --> src/backend/chunk.rs:184:9
[INFO] [stdout]     |
[INFO] [stdout] 184 | /         if op_code_opt.is_none() {
[INFO] [stdout] 185 | |             return None;
[INFO] [stdout] 186 | |         }
[INFO] [stdout]     | |_________^ help: replace it with: `op_code_opt?;`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#question_mark
[INFO] [stdout]     = note: `#[warn(clippy::question_mark)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `u8` which implements the `Copy` trait
[INFO] [stdout]    --> src/backend/chunk.rs:188:23
[INFO] [stdout]     |
[INFO] [stdout] 188 |         let op_code = op_code_opt.unwrap().clone();
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*op_code_opt.unwrap()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `u8` which implements the `Copy` trait
[INFO] [stdout]    --> src/backend/chunk.rs:286:40
[INFO] [stdout]     |
[INFO] [stdout] 286 |                         let num_args = num_args.clone();
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^ help: try dereferencing it: `*num_args`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/backend/chunk.rs:199:17
[INFO] [stdout]     |
[INFO] [stdout] 199 | /                 match value_idx_opt {
[INFO] [stdout] 200 | |                     Some(value_idx) => 
[INFO] [stdout] 201 | |                         Some((Instruction::Constant { value_idx: value_idx.clone() }, next_offset)),
[INFO] [stdout] 202 | |                     None => None
[INFO] [stdout] 203 | |                 }
[INFO] [stdout]     | |_________________^ help: try: `value_idx_opt.map(|value_idx| (Instruction::Constant { value_idx: value_idx.clone() }, next_offset))`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout]     = note: `#[warn(clippy::manual_map)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `u8` which implements the `Copy` trait
[INFO] [stdout]    --> src/backend/chunk.rs:201:66
[INFO] [stdout]     |
[INFO] [stdout] 201 |                         Some((Instruction::Constant { value_idx: value_idx.clone() }, next_offset)),
[INFO] [stdout]     |                                                                  ^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*value_idx`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `u32` which implements the `Copy` trait
[INFO] [stdout]    --> src/backend/chunk.rs:208:62
[INFO] [stdout]     |
[INFO] [stdout] 208 |                 Some((Instruction::ConstantLong { value_idx: value_idx.clone() }, 
[INFO] [stdout]     |                                                              ^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `value_idx`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `i32` which implements the `Copy` trait
[INFO] [stdout]    --> src/backend/chunk.rs:327:29
[INFO] [stdout]     |
[INFO] [stdout] 327 |                 return Some(line.clone());
[INFO] [stdout]     |                             ^^^^^^^^^^^^ help: try dereferencing it: `*line`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `u8` which implements the `Copy` trait
[INFO] [stdout]    --> src/backend/chunk.rs:286:40
[INFO] [stdout]     |
[INFO] [stdout] 286 |                         let num_args = num_args.clone();
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^ help: try dereferencing it: `*num_args`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `i32` which implements the `Copy` trait
[INFO] [stdout]    --> src/backend/chunk.rs:327:29
[INFO] [stdout]     |
[INFO] [stdout] 327 |                 return Some(line.clone());
[INFO] [stdout]     |                             ^^^^^^^^^^^^ help: try dereferencing it: `*line`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `f64` which implements the `Copy` trait
[INFO] [stdout]   --> src/backend/value.rs:42:47
[INFO] [stdout]    |
[INFO] [stdout] 42 |             Self::Number(val) => Self::Number(val.clone()),
[INFO] [stdout]    |                                               ^^^^^^^^^^^ help: try dereferencing it: `*val`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `bool` which implements the `Copy` trait
[INFO] [stdout]   --> src/backend/value.rs:43:43
[INFO] [stdout]    |
[INFO] [stdout] 43 |             Self::Bool(val) => Self::Bool(val.clone()),
[INFO] [stdout]    |                                           ^^^^^^^^^^^ help: try dereferencing it: `*val`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `VM`
[INFO] [stdout]   --> src/backend/vm.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 | /     pub fn new() -> VM {
[INFO] [stdout] 46 | |         VM::new_with_frame(CallFrame::new_top())
[INFO] [stdout] 47 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout] 44 + impl Default for VM {
[INFO] [stdout] 45 +     fn default() -> Self {
[INFO] [stdout] 46 +         Self::new()
[INFO] [stdout] 47 +     }
[INFO] [stdout] 48 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/backend/vm.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         let ret = current_frame.ip;
[INFO] [stdout]    |         --------------------------- unnecessary `let` binding
[INFO] [stdout] 75 |         ret
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout]    = note: `#[warn(clippy::let_and_return)]` on by default
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 74 ~         
[INFO] [stdout] 75 ~         current_frame.ip
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/backend/vm.rs:81:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let ret = current_frame.stack_base;
[INFO] [stdout]    |         ----------------------------------- unnecessary `let` binding
[INFO] [stdout] 81 |         ret
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 80 ~         
[INFO] [stdout] 81 ~         current_frame.stack_base
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `f64` which implements the `Copy` trait
[INFO] [stdout]   --> src/backend/value.rs:42:47
[INFO] [stdout]    |
[INFO] [stdout] 42 |             Self::Number(val) => Self::Number(val.clone()),
[INFO] [stdout]    |                                               ^^^^^^^^^^^ help: try dereferencing it: `*val`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `bool` which implements the `Copy` trait
[INFO] [stdout]   --> src/backend/value.rs:43:43
[INFO] [stdout]    |
[INFO] [stdout] 43 |             Self::Bool(val) => Self::Bool(val.clone()),
[INFO] [stdout]    |                                           ^^^^^^^^^^^ help: try dereferencing it: `*val`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `VM`
[INFO] [stdout]   --> src/backend/vm.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 | /     pub fn new() -> VM {
[INFO] [stdout] 46 | |         VM::new_with_frame(CallFrame::new_top())
[INFO] [stdout] 47 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout] 44 + impl Default for VM {
[INFO] [stdout] 45 +     fn default() -> Self {
[INFO] [stdout] 46 +         Self::new()
[INFO] [stdout] 47 +     }
[INFO] [stdout] 48 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/backend/vm.rs:220:9
[INFO] [stdout]     |
[INFO] [stdout] 220 | /         match stack.get(index) {
[INFO] [stdout] 221 | |             Some(value) => Some(value.clone()),
[INFO] [stdout] 222 | |             None => None,
[INFO] [stdout] 223 | |         } 
[INFO] [stdout]     | |_________^ help: try: `stack.get(index).map(|value| value.clone())`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/backend/vm.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 74 |         let ret = current_frame.ip;
[INFO] [stdout]    |         --------------------------- unnecessary `let` binding
[INFO] [stdout] 75 |         ret
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout]    = note: `#[warn(clippy::let_and_return)]` on by default
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 74 ~         
[INFO] [stdout] 75 ~         current_frame.ip
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]   --> src/backend/vm.rs:81:9
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let ret = current_frame.stack_base;
[INFO] [stdout]    |         ----------------------------------- unnecessary `let` binding
[INFO] [stdout] 81 |         ret
[INFO] [stdout]    |         ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]    |
[INFO] [stdout] 80 ~         
[INFO] [stdout] 81 ~         current_frame.stack_base
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `varvalue` after checking its variant with `is_some`
[INFO] [stdout]    --> src/backend/vm.rs:321:31
[INFO] [stdout]     |
[INFO] [stdout] 320 |                 if varvalue.is_some() {
[INFO] [stdout]     |                 --------------------- help: try: `if let Some(<item>) = varvalue`
[INFO] [stdout] 321 |                     self.push(varvalue.unwrap());
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: usage of `contains_key` followed by `insert` on a `HashMap`
[INFO] [stdout]    --> src/backend/vm.rs:348:17
[INFO] [stdout]     |
[INFO] [stdout] 348 | /                 if globals.contains_key(&varname) {
[INFO] [stdout] 349 | |                     let new_value = self.peek(0).unwrap();
[INFO] [stdout] 350 | |                     globals.insert(varname, new_value);
[INFO] [stdout] 351 | |                 } else {
[INFO] [stdout] ...   |
[INFO] [stdout] 354 | |                     return Some(InterpretResult::RuntimeError);
[INFO] [stdout] 355 | |                 }
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using the `Entry` API: https://doc.rust-lang.org/std/collections/struct.HashMap.html#entry-api
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_entry
[INFO] [stdout]     = note: `#[warn(clippy::map_entry)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `Option::map`
[INFO] [stdout]    --> src/backend/vm.rs:220:9
[INFO] [stdout]     |
[INFO] [stdout] 220 | /         match stack.get(index) {
[INFO] [stdout] 221 | |             Some(value) => Some(value.clone()),
[INFO] [stdout] 222 | |             None => None,
[INFO] [stdout] 223 | |         } 
[INFO] [stdout]     | |_________^ help: try: `stack.get(index).map(|value| value.clone())`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `varvalue` after checking its variant with `is_some`
[INFO] [stdout]    --> src/backend/vm.rs:321:31
[INFO] [stdout]     |
[INFO] [stdout] 320 |                 if varvalue.is_some() {
[INFO] [stdout]     |                 --------------------- help: try: `if let Some(<item>) = varvalue`
[INFO] [stdout] 321 |                     self.push(varvalue.unwrap());
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: usage of `contains_key` followed by `insert` on a `HashMap`
[INFO] [stdout]    --> src/backend/vm.rs:348:17
[INFO] [stdout]     |
[INFO] [stdout] 348 | /                 if globals.contains_key(&varname) {
[INFO] [stdout] 349 | |                     let new_value = self.peek(0).unwrap();
[INFO] [stdout] 350 | |                     globals.insert(varname, new_value);
[INFO] [stdout] 351 | |                 } else {
[INFO] [stdout] ...   |
[INFO] [stdout] 354 | |                     return Some(InterpretResult::RuntimeError);
[INFO] [stdout] 355 | |                 }
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using the `Entry` API: https://doc.rust-lang.org/std/collections/struct.HashMap.html#entry-api
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_entry
[INFO] [stdout]     = note: `#[warn(clippy::map_entry)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: match expression looks like `matches!` macro
[INFO] [stdout]    --> src/backend/vm.rs:529:9
[INFO] [stdout]     |
[INFO] [stdout] 529 | /         match value {
[INFO] [stdout] 530 | |             Value::Nil => true,
[INFO] [stdout] 531 | |             Value::Bool(false) => true,
[INFO] [stdout] 532 | |             _ => false
[INFO] [stdout] 533 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_like_matches_macro
[INFO] [stdout]     = note: `#[warn(clippy::match_like_matches_macro)]` on by default
[INFO] [stdout] help: use `matches!` directly
[INFO] [stdout]     |
[INFO] [stdout] 529 -         match value {
[INFO] [stdout] 530 -             Value::Nil => true,
[INFO] [stdout] 531 -             Value::Bool(false) => true,
[INFO] [stdout] 532 -             _ => false
[INFO] [stdout] 533 -         }
[INFO] [stdout] 529 +         matches!(value, Value::Nil | Value::Bool(false))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `new_string_opt` after checking its variant with `is_none`
[INFO] [stdout]    --> src/backend/vm.rs:571:43
[INFO] [stdout]     |
[INFO] [stdout] 568 |                 if new_string_opt.is_none() {
[INFO] [stdout]     |                 --------------------------- help: try: `if let Some(<item>) = new_string_opt`
[INFO] [stdout] ...
[INFO] [stdout] 571 |                     self.push(&Value::Str(new_string_opt.unwrap()));
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `HeapManager`
[INFO] [stdout]   --> src/backend/heap.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 58 | /     pub fn new() -> HeapManager {
[INFO] [stdout] 59 | |         HeapManager {
[INFO] [stdout] 60 | |             objects: vec![], 
[INFO] [stdout] 61 | |             free_slots: vec![], 
[INFO] [stdout] 62 | |         }
[INFO] [stdout] 63 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout] 56 + impl Default for HeapManager {
[INFO] [stdout] 57 +     fn default() -> Self {
[INFO] [stdout] 58 +         Self::new()
[INFO] [stdout] 59 +     }
[INFO] [stdout] 60 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: match expression looks like `matches!` macro
[INFO] [stdout]    --> src/backend/vm.rs:529:9
[INFO] [stdout]     |
[INFO] [stdout] 529 | /         match value {
[INFO] [stdout] 530 | |             Value::Nil => true,
[INFO] [stdout] 531 | |             Value::Bool(false) => true,
[INFO] [stdout] 532 | |             _ => false
[INFO] [stdout] 533 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#match_like_matches_macro
[INFO] [stdout]     = note: `#[warn(clippy::match_like_matches_macro)]` on by default
[INFO] [stdout] help: use `matches!` directly
[INFO] [stdout]     |
[INFO] [stdout] 529 -         match value {
[INFO] [stdout] 530 -             Value::Nil => true,
[INFO] [stdout] 531 -             Value::Bool(false) => true,
[INFO] [stdout] 532 -             _ => false
[INFO] [stdout] 533 -         }
[INFO] [stdout] 529 +         matches!(value, Value::Nil | Value::Bool(false))
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `new_string_opt` after checking its variant with `is_none`
[INFO] [stdout]    --> src/backend/vm.rs:571:43
[INFO] [stdout]     |
[INFO] [stdout] 568 |                 if new_string_opt.is_none() {
[INFO] [stdout]     |                 --------------------------- help: try: `if let Some(<item>) = new_string_opt`
[INFO] [stdout] ...
[INFO] [stdout] 571 |                     self.push(&Value::Str(new_string_opt.unwrap()));
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/backend/native.rs:29:29
[INFO] [stdout]    |
[INFO] [stdout] 29 |     Ok(Value::Str(s1.concat(&s2)))
[INFO] [stdout]    |                             ^^^ help: change this to: `s2`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/frontend/scanner.rs:15:24
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(source: &str) -> Scanner {
[INFO] [stdout]    |                        ^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        the lifetime is elided 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: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(source: &str) -> Scanner<'_> {
[INFO] [stdout]    |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/frontend/compiler.rs:36:36
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn new(source: &'a str) -> Compiler {
[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] 36 |     pub fn new(source: &'a str) -> Compiler<'a> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `HeapManager`
[INFO] [stdout]   --> src/backend/heap.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 58 | /     pub fn new() -> HeapManager {
[INFO] [stdout] 59 | |         HeapManager {
[INFO] [stdout] 60 | |             objects: vec![], 
[INFO] [stdout] 61 | |             free_slots: vec![], 
[INFO] [stdout] 62 | |         }
[INFO] [stdout] 63 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout] 56 + impl Default for HeapManager {
[INFO] [stdout] 57 +     fn default() -> Self {
[INFO] [stdout] 58 +         Self::new()
[INFO] [stdout] 59 +     }
[INFO] [stdout] 60 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/backend/chunk.rs:334:35
[INFO] [stdout]     |
[INFO] [stdout] 334 |     pub fn instruction_iter(self: &Chunk) -> InstructionIter {
[INFO] [stdout]     |                                   ^^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                   |
[INFO] [stdout]     |                                   the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 334 |     pub fn instruction_iter(self: &Chunk) -> InstructionIter<'_> {
[INFO] [stdout]     |                                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/backend/vm.rs:62:20
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn current_fun(&self) -> Ref<FunData> {
[INFO] [stdout]    |                    ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn current_fun(&self) -> Ref<'_, FunData> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/backend/vm.rs:67:24
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn current_fun_mut(&mut self) -> RefMut<FunData> {
[INFO] [stdout]    |                        ^^^^^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn current_fun_mut(&mut self) -> RefMut<'_, FunData> {
[INFO] [stdout]    |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/backend/objects.rs:54:25
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub fn borrow_chunk(&self) -> Ref<Chunk> {
[INFO] [stdout]    |                         ^^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub fn borrow_chunk(&self) -> Ref<'_, Chunk> {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/backend/objects.rs:58:29
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn borrow_chunk_mut(&mut self) -> RefMut<Chunk> {
[INFO] [stdout]    |                             ^^^^^^^^^     ^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn borrow_chunk_mut(&mut self) -> RefMut<'_, Chunk> {
[INFO] [stdout]    |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/backend/objects.rs:150:23
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn borrow_fun(&self) -> Ref<FunData> {
[INFO] [stdout]     |                       ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn borrow_fun(&self) -> Ref<'_, FunData> {
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/backend/objects.rs:154:27
[INFO] [stdout]     |
[INFO] [stdout] 154 |     pub fn borrow_fun_mut(&mut self) -> RefMut<FunData> {
[INFO] [stdout]     |                           ^^^^^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 154 |     pub fn borrow_fun_mut(&mut self) -> RefMut<'_, FunData> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/backend/native.rs:29:29
[INFO] [stdout]    |
[INFO] [stdout] 29 |     Ok(Value::Str(s1.concat(&s2)))
[INFO] [stdout]    |                             ^^^ help: change this to: `s2`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/frontend/scanner.rs:15:24
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(source: &str) -> Scanner {
[INFO] [stdout]    |                        ^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        the lifetime is elided 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: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(source: &str) -> Scanner<'_> {
[INFO] [stdout]    |                                        ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]   --> src/frontend/compiler.rs:36:36
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn new(source: &'a str) -> Compiler {
[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] 36 |     pub fn new(source: &'a str) -> Compiler<'a> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/backend/chunk.rs:334:35
[INFO] [stdout]     |
[INFO] [stdout] 334 |     pub fn instruction_iter(self: &Chunk) -> InstructionIter {
[INFO] [stdout]     |                                   ^^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                                   |
[INFO] [stdout]     |                                   the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 334 |     pub fn instruction_iter(self: &Chunk) -> InstructionIter<'_> {
[INFO] [stdout]     |                                                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/backend/vm.rs:62:20
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn current_fun(&self) -> Ref<FunData> {
[INFO] [stdout]    |                    ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn current_fun(&self) -> Ref<'_, FunData> {
[INFO] [stdout]    |                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/backend/vm.rs:67:24
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn current_fun_mut(&mut self) -> RefMut<FunData> {
[INFO] [stdout]    |                        ^^^^^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn current_fun_mut(&mut self) -> RefMut<'_, FunData> {
[INFO] [stdout]    |                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/backend/objects.rs:54:25
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub fn borrow_chunk(&self) -> Ref<Chunk> {
[INFO] [stdout]    |                         ^^^^^     ^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub fn borrow_chunk(&self) -> Ref<'_, Chunk> {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/backend/objects.rs:58:29
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn borrow_chunk_mut(&mut self) -> RefMut<Chunk> {
[INFO] [stdout]    |                             ^^^^^^^^^     ^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                             |
[INFO] [stdout]    |                             the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn borrow_chunk_mut(&mut self) -> RefMut<'_, Chunk> {
[INFO] [stdout]    |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/backend/objects.rs:150:23
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn borrow_fun(&self) -> Ref<FunData> {
[INFO] [stdout]     |                       ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 150 |     pub fn borrow_fun(&self) -> Ref<'_, FunData> {
[INFO] [stdout]     |                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/backend/objects.rs:154:27
[INFO] [stdout]     |
[INFO] [stdout] 154 |     pub fn borrow_fun_mut(&mut self) -> RefMut<FunData> {
[INFO] [stdout]     |                           ^^^^^^^^^     ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 154 |     pub fn borrow_fun_mut(&mut self) -> RefMut<'_, FunData> {
[INFO] [stdout]     |                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: empty string literal in `println!`
[INFO] [stdout]    --> tests/compiler_test.rs:229:5
[INFO] [stdout]     |
[INFO] [stdout] 229 |     println!("");
[INFO] [stdout]     |     ^^^^^^^^^--^
[INFO] [stdout]     |              |
[INFO] [stdout]     |              help: remove the empty string
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string
[INFO] [stdout]     = note: `#[warn(clippy::println_empty_string)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this assertion is always `false`
[INFO] [stdout]    --> tests/compiler_test.rs:240:14
[INFO] [stdout]     |
[INFO] [stdout] 240 |         _ => assert!(false)
[INFO] [stdout]     |              ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: replace this with `panic!()` or `unreachable!()`
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assertions_on_constants
[INFO] [stdout]     = note: `#[warn(clippy::assertions_on_constants)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> tests/compiler_test.rs:263:21
[INFO] [stdout]     |
[INFO] [stdout] 263 |         disassemble(&chunk,name);
[INFO] [stdout]     |                     ^^^^^^ help: change this to: `chunk`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]     = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `Command { std: "docker" "inspect" "0f9bd95f5cd51cd45e59afca5c78f318152319048de7e9758925521aba7b00ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f9bd95f5cd51cd45e59afca5c78f318152319048de7e9758925521aba7b00ff", kill_on_drop: false }`
[INFO] [stdout] 0f9bd95f5cd51cd45e59afca5c78f318152319048de7e9758925521aba7b00ff