[INFO] cloning repository https://github.com/DCubix/Twen
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/DCubix/Twen" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDCubix%2FTwen", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDCubix%2FTwen'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 72f220dc0d1c22983f13ecd8a3e43f6985e435f6
[INFO] checking DCubix/Twen against master#dc375db7d8df0aa450e622c529147c95eee756f5 for pr-156749
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDCubix%2FTwen" "/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/DCubix/Twen
[INFO] finished tweaking git repo https://github.com/DCubix/Twen
[INFO] tweaked toml for git repo https://github.com/DCubix/Twen written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/DCubix/Twen on toolchain dc375db7d8df0aa450e622c529147c95eee756f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dc375db7d8df0aa450e622c529147c95eee756f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/DCubix/Twen 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" "+dc375db7d8df0aa450e622c529147c95eee756f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bitflags v0.7.0
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 5b7b1402788f5b5f1061e8d2ad64e04be14a78d4613c24e876060bf225c5a416
[INFO] running `Command { std: "docker" "start" "5b7b1402788f5b5f1061e8d2ad64e04be14a78d4613c24e876060bf225c5a416", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5b7b1402788f5b5f1061e8d2ad64e04be14a78d4613c24e876060bf225c5a416" "/opt/rustwide/cargo-home/bin/cargo" "+dc375db7d8df0aa450e622c529147c95eee756f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b7b1402788f5b5f1061e8d2ad64e04be14a78d4613c24e876060bf225c5a416", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5b7b1402788f5b5f1061e8d2ad64e04be14a78d4613c24e876060bf225c5a416" "/opt/rustwide/cargo-home/bin/cargo" "+dc375db7d8df0aa450e622c529147c95eee756f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking futures v0.1.25
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking slab v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]     Checking same-file v1.0.4
[INFO] [stderr]     Checking smallvec v0.6.7
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking crossbeam-utils v0.6.3
[INFO] [stderr]    Compiling sdl2-sys v0.32.4
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking walkdir v2.2.7
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking num_cpus v1.9.0
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking filetime v0.2.4
[INFO] [stderr]     Checking bytes v0.4.11
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]     Checking tokio-io v0.1.10
[INFO] [stderr]     Checking tokio-executor v0.1.5
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking sdl2 v0.32.0
[INFO] [stderr]     Checking mio-extras v2.0.5
[INFO] [stderr]     Checking tokio-reactor v0.1.7
[INFO] [stderr]     Checking inotify v0.6.1
[INFO] [stderr]     Checking notify v4.0.6
[INFO] [stderr]     Checking twen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/parser.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/parser.rs:95:7
[INFO] [stdout]    |
[INFO] [stdout] 95 |             'a'...'z' | 'A'...'Z' | '_' => { // Identifier
[INFO] [stdout]    |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/parser.rs:95:19
[INFO] [stdout]    |
[INFO] [stdout] 95 |             'a'...'z' | 'A'...'Z' | '_' => { // Identifier
[INFO] [stdout]    |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/parser.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |             '-' | '0'...'9' | '.' => { // Number
[INFO] [stdout]     |                      ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Input` and `NodeGraph`
[INFO] [stdout]  --> src/main.rs:7:19
[INFO] [stdout]   |
[INFO] [stdout] 7 | use self::node::{ NodeGraph, Input };
[INFO] [stdout]   |                   ^^^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Parser`
[INFO] [stdout]  --> src/main.rs:8:21
[INFO] [stdout]   |
[INFO] [stdout] 8 | use self::parser::{ Parser, GraphLoader };
[INFO] [stdout]   |                     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use std::fs::File;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env`
[INFO] [stdout]  --> src/parser.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::env;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/parser.rs:95:7
[INFO] [stdout]    |
[INFO] [stdout] 95 |             'a'...'z' | 'A'...'Z' | '_' => { // Identifier
[INFO] [stdout]    |                ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> src/parser.rs:95:19
[INFO] [stdout]    |
[INFO] [stdout] 95 |             'a'...'z' | 'A'...'Z' | '_' => { // Identifier
[INFO] [stdout]    |                            ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/parser.rs:103:13
[INFO] [stdout]     |
[INFO] [stdout] 103 |             '-' | '0'...'9' | '.' => { // Number
[INFO] [stdout]     |                      ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Input` and `NodeGraph`
[INFO] [stdout]  --> src/main.rs:7:19
[INFO] [stdout]   |
[INFO] [stdout] 7 | use self::node::{ NodeGraph, Input };
[INFO] [stdout]   |                   ^^^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Parser`
[INFO] [stdout]  --> src/main.rs:8:21
[INFO] [stdout]   |
[INFO] [stdout] 8 | use self::parser::{ Parser, GraphLoader };
[INFO] [stdout]   |                     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use std::fs::File;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/node.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 |             _ => 0.0
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/node.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 36 |             Input::Value(v) => v,
[INFO] [stdout]    |             --------------- matches some of the same values
[INFO] [stdout] 37 |             Input::Node(id) => ctx.outputs[id],
[INFO] [stdout]    |             --------------- matches some of the same values
[INFO] [stdout] 38 |             Input::Store(id) => ctx.store[id],
[INFO] [stdout]    |             ---------------- matches some of the same values
[INFO] [stdout] 39 |             _ => 0.0
[INFO] [stdout]    |             ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/parser.rs:422:4
[INFO] [stdout]     |
[INFO] [stdout] 422 |             _ => Value::Nil
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/parser.rs:422:4
[INFO] [stdout]     |
[INFO] [stdout] 320 |             Expr::Literal(v) => Value::Number(v),
[INFO] [stdout]     |             ---------------- matches some of the same values
[INFO] [stdout] 321 |             Expr::Identifier(s) => {
[INFO] [stdout]     |             ------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 329 |             Expr::Assign(a, b) => {
[INFO] [stdout]     |             ------------------ matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 343 |             Expr::Call(func, args) => {
[INFO] [stdout]     |             ---------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 422 |             _ => Value::Nil
[INFO] [stdout]     |             ^ ...and 1 other patterns collectively make this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/node.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 39 |             _ => 0.0
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/node.rs:39:4
[INFO] [stdout]    |
[INFO] [stdout] 36 |             Input::Value(v) => v,
[INFO] [stdout]    |             --------------- matches some of the same values
[INFO] [stdout] 37 |             Input::Node(id) => ctx.outputs[id],
[INFO] [stdout]    |             --------------- matches some of the same values
[INFO] [stdout] 38 |             Input::Store(id) => ctx.store[id],
[INFO] [stdout]    |             ---------------- matches some of the same values
[INFO] [stdout] 39 |             _ => 0.0
[INFO] [stdout]    |             ^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:60:6
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let mut device = audio.open_playback(None, &desired_spec, |spec| {
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `spec`
[INFO] [stdout]   --> src/main.rs:60:61
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let mut device = audio.open_playback(None, &desired_spec, |spec| {
[INFO] [stdout]    |                                                                ^^^^ help: if this is intentional, prefix it with an underscore: `_spec`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `InputContext<'_, '_>` is more private than the item `node::Input::sample`
[INFO] [stdout]   --> src/node.rs:34:2
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn sample(self, ctx: InputContext) -> f32 {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method `node::Input::sample` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `InputContext<'_, '_>` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/node.rs:68:1
[INFO] [stdout]    |
[INFO] [stdout] 68 | struct InputContext<'outs, 'stor> {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Null` is never constructed
[INFO] [stdout]   --> src/node.rs:46:2
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub enum Node {
[INFO] [stdout]    |          ---- variant in this enum
[INFO] [stdout] 46 |     Null,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete_node` is never used
[INFO] [stdout]    --> src/node.rs:174:9
[INFO] [stdout]     |
[INFO] [stdout]  83 | impl NodeGraph {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 174 |     pub fn delete_node(&mut self, id: usize) -> Result<(), &str> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `prev`, `peek`, and `step_back` are never used
[INFO] [stdout]   --> src/parser.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Reader {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn prev(&self) -> Option<char> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     pub fn peek(&self) -> Option<char> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn step_back(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `audioSender` should have a snake case name
[INFO] [stdout]   --> src/main.rs:58:7
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let (audioSender, rx) = mpsc::channel();
[INFO] [stdout]    |          ^^^^^^^^^^^ help: convert the identifier to snake case: `audio_sender`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `audioReceiver` should have a snake case name
[INFO] [stdout]   --> src/main.rs:59:11
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let (cs, audioReceiver) = mpsc::channel();
[INFO] [stdout]    |              ^^^^^^^^^^^^^ help: convert the identifier to snake case: `audio_receiver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:134:4
[INFO] [stdout]     |
[INFO] [stdout] 134 |             canvas.draw_line(Point::new(px, py), Point::new(i as i32, y));
[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] 134 |             let _ = canvas.draw_line(Point::new(px, py), Point::new(i as i32, y));
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/parser.rs:422:4
[INFO] [stdout]     |
[INFO] [stdout] 422 |             _ => Value::Nil
[INFO] [stdout]     |             ^ no value can reach this
[INFO] [stdout]     |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]    --> src/parser.rs:422:4
[INFO] [stdout]     |
[INFO] [stdout] 320 |             Expr::Literal(v) => Value::Number(v),
[INFO] [stdout]     |             ---------------- matches some of the same values
[INFO] [stdout] 321 |             Expr::Identifier(s) => {
[INFO] [stdout]     |             ------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 329 |             Expr::Assign(a, b) => {
[INFO] [stdout]     |             ------------------ matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 343 |             Expr::Call(func, args) => {
[INFO] [stdout]     |             ---------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 422 |             _ => Value::Nil
[INFO] [stdout]     |             ^ ...and 1 other patterns collectively make this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:60:6
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let mut device = audio.open_playback(None, &desired_spec, |spec| {
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `spec`
[INFO] [stdout]   --> src/main.rs:60:61
[INFO] [stdout]    |
[INFO] [stdout] 60 |     let mut device = audio.open_playback(None, &desired_spec, |spec| {
[INFO] [stdout]    |                                                                ^^^^ help: if this is intentional, prefix it with an underscore: `_spec`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `InputContext<'_, '_>` is more private than the item `node::Input::sample`
[INFO] [stdout]   --> src/node.rs:34:2
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn sample(self, ctx: InputContext) -> f32 {
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method `node::Input::sample` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `InputContext<'_, '_>` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/node.rs:68:1
[INFO] [stdout]    |
[INFO] [stdout] 68 | struct InputContext<'outs, 'stor> {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Null` is never constructed
[INFO] [stdout]   --> src/node.rs:46:2
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub enum Node {
[INFO] [stdout]    |          ---- variant in this enum
[INFO] [stdout] 46 |     Null,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `delete_node` is never used
[INFO] [stdout]    --> src/node.rs:174:9
[INFO] [stdout]     |
[INFO] [stdout]  83 | impl NodeGraph {
[INFO] [stdout]     | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 174 |     pub fn delete_node(&mut self, id: usize) -> Result<(), &str> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `prev`, `peek`, and `step_back` are never used
[INFO] [stdout]   --> src/parser.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl Reader {
[INFO] [stdout]    | ----------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 25 |     pub fn prev(&self) -> Option<char> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 41 |     pub fn peek(&self) -> Option<char> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn step_back(&mut self) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `audioSender` should have a snake case name
[INFO] [stdout]   --> src/main.rs:58:7
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let (audioSender, rx) = mpsc::channel();
[INFO] [stdout]    |          ^^^^^^^^^^^ help: convert the identifier to snake case: `audio_sender`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `audioReceiver` should have a snake case name
[INFO] [stdout]   --> src/main.rs:59:11
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let (cs, audioReceiver) = mpsc::channel();
[INFO] [stdout]    |              ^^^^^^^^^^^^^ help: convert the identifier to snake case: `audio_receiver`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:134:4
[INFO] [stdout]     |
[INFO] [stdout] 134 |             canvas.draw_line(Point::new(px, py), Point::new(i as i32, y));
[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] 134 |             let _ = canvas.draw_line(Point::new(px, py), Point::new(i as i32, y));
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.87s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: bitflags v0.7.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 5`
[INFO] running `Command { std: "docker" "inspect" "5b7b1402788f5b5f1061e8d2ad64e04be14a78d4613c24e876060bf225c5a416", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b7b1402788f5b5f1061e8d2ad64e04be14a78d4613c24e876060bf225c5a416", kill_on_drop: false }`
[INFO] [stdout] 5b7b1402788f5b5f1061e8d2ad64e04be14a78d4613c24e876060bf225c5a416
