[INFO] fetching crate tiny-earley 0.2.0...
[INFO] testing tiny-earley-0.2.0 against 1.95.0 for beta-1.96-2
[INFO] extracting crate tiny-earley 0.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate tiny-earley 0.2.0
[INFO] finished tweaking crates.io crate tiny-earley 0.2.0
[INFO] tweaked toml for crates.io crate tiny-earley 0.2.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tiny-earley 0.2.0 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tiny-earley 0.2.0 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded internship v0.6.0
[INFO] [stderr]   Downloaded c_lexer_logos v0.1.1
[INFO] [stderr]   Downloaded elsa v1.11.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 59a0666db2d57db0fa82acc1cb109f7a3efb1a008c4954221850ee0a0f107e55
[INFO] running `Command { std: "docker" "start" "-a" "59a0666db2d57db0fa82acc1cb109f7a3efb1a008c4954221850ee0a0f107e55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59a0666db2d57db0fa82acc1cb109f7a3efb1a008c4954221850ee0a0f107e55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59a0666db2d57db0fa82acc1cb109f7a3efb1a008c4954221850ee0a0f107e55", kill_on_drop: false }`
[INFO] [stdout] 59a0666db2d57db0fa82acc1cb109f7a3efb1a008c4954221850ee0a0f107e55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a6f96d0b82493d21d454fdf844f65bc246ec70c41a82fd3e24dd1ccd7140e953
[INFO] running `Command { std: "docker" "start" "-a" "a6f96d0b82493d21d454fdf844f65bc246ec70c41a82fd3e24dd1ccd7140e953", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling hashbrown v0.15.4
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling syn v2.0.103
[INFO] [stderr]    Compiling indexmap v2.9.0
[INFO] [stderr]    Compiling elsa v1.11.2
[INFO] [stderr]    Compiling logos-codegen v0.13.0
[INFO] [stderr]    Compiling internship v0.6.0
[INFO] [stderr]    Compiling logos-derive v0.13.0
[INFO] [stderr]    Compiling logos v0.13.0
[INFO] [stderr]    Compiling c_lexer_logos v0.1.1
[INFO] [stderr]    Compiling tiny-earley v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Rule` and `Symbol`
[INFO] [stdout]  --> load.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{Rule, Symbol};
[INFO] [stdout]   |             ^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Grammar`
[INFO] [stdout]  --> load.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use super::Grammar;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_factor`
[INFO] [stdout]    --> forest.rs:203:21
[INFO] [stdout]     |
[INFO] [stdout] 203 |                     right_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: try ignoring the field: `right_factor: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_factor`
[INFO] [stdout]    --> forest.rs:217:21
[INFO] [stdout]     |
[INFO] [stdout] 217 |                     left_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^ help: try ignoring the field: `left_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_factor`
[INFO] [stdout]    --> forest.rs:232:21
[INFO] [stdout]     |
[INFO] [stdout] 232 |                     left_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^ help: try ignoring the field: `left_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_factor`
[INFO] [stdout]    --> forest.rs:233:21
[INFO] [stdout]     |
[INFO] [stdout] 233 |                     right_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: try ignoring the field: `right_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_factor`
[INFO] [stdout]    --> forest.rs:237:21
[INFO] [stdout]     |
[INFO] [stdout] 237 |                     left_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^ help: try ignoring the field: `left_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_factor`
[INFO] [stdout]    --> forest.rs:238:21
[INFO] [stdout]     |
[INFO] [stdout] 238 |                     right_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: try ignoring the field: `right_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> lib.rs:277:13
[INFO] [stdout]     |
[INFO] [stdout] 277 |         let mut rules = self.rules.clone();
[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: `rules`
[INFO] [stdout]    --> lib.rs:277:13
[INFO] [stdout]     |
[INFO] [stdout] 277 |         let mut rules = self.rules.clone();
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rules`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rule`
[INFO] [stdout]    --> lib.rs:644:17
[INFO] [stdout]     |
[INFO] [stdout] 644 |         for (i, rule) in self.tables.rules.iter().enumerate() {
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_rule`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]    --> lib.rs:857:14
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factor`
[INFO] [stdout]    --> lib.rs:857:19
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_factor`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_mul`
[INFO] [stdout]    --> lib.rs:857:27
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_mul`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_div`
[INFO] [stdout]    --> lib.rs:857:35
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_div`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lparen`
[INFO] [stdout]    --> lib.rs:857:43
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_lparen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rparen`
[INFO] [stdout]    --> lib.rs:857:51
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_rparen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_minus`
[INFO] [stdout]    --> lib.rs:857:70
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                      ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_minus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_plus`
[INFO] [stdout]    --> lib.rs:857:80
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_plus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dot`
[INFO] [stdout]    --> lib.rs:857:113
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_dot`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]    --> lib.rs:867:14
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factor`
[INFO] [stdout]    --> lib.rs:867:19
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_factor`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_mul`
[INFO] [stdout]    --> lib.rs:867:27
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_mul`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_div`
[INFO] [stdout]    --> lib.rs:867:35
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_div`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lparen`
[INFO] [stdout]    --> lib.rs:867:43
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_lparen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rparen`
[INFO] [stdout]    --> lib.rs:867:51
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_rparen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_minus`
[INFO] [stdout]    --> lib.rs:867:70
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                      ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_minus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_plus`
[INFO] [stdout]    --> lib.rs:867:80
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_plus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `digit`
[INFO] [stdout]    --> lib.rs:867:106
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_digit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dot`
[INFO] [stdout]    --> lib.rs:867:113
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_dot`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]    --> lib.rs:906:14
[INFO] [stdout]     |
[INFO] [stdout] 906 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factor`
[INFO] [stdout]    --> lib.rs:906:19
[INFO] [stdout]     |
[INFO] [stdout] 906 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_factor`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `CompletedItem` is more private than the item `forest::Forest::push_summand`
[INFO] [stdout]    --> forest.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn push_summand(&mut self, item: CompletedItem) -> NodeHandle {
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method `forest::Forest::push_summand` is reachable at visibility `pub`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `CompletedItem` is only usable at visibility `pub(crate)`
[INFO] [stdout]    --> lib.rs:172:1
[INFO] [stdout]     |
[INFO] [stdout] 172 | struct CompletedItem {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `rhs_nulling` is never read
[INFO] [stdout]   --> lib.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Grammar<const S: usize> {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 27 |     rhs_nulling: Vec<NullingEliminated>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Grammar` has a derived impl for the trait `Clone`, 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: variants `Left`, `Right`, and `Both` are never constructed
[INFO] [stdout]   --> lib.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | enum Side {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 32 |     Left,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 33 |     Right,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 34 |     Both,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Side` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `rule_id`, `sym`, and `side` are never read
[INFO] [stdout]   --> lib.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct NullingEliminated {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] 39 |     rule_id: Option<usize>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 40 |     sym: Symbol,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 41 |     side: Side,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NullingEliminated` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `symbol` is never read
[INFO] [stdout]   --> lib.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | struct PredictionTransition {
[INFO] [stdout]    |        -------------------- field in this struct
[INFO] [stdout] 65 |     symbol: Symbol,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PredictionTransition` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EarleySet` is never constructed
[INFO] [stdout]    --> lib.rs:158:8
[INFO] [stdout]     |
[INFO] [stdout] 158 | struct EarleySet<const S: usize> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> lib.rs:206:8
[INFO] [stdout]     |
[INFO] [stdout] 205 | impl<const S: usize> EarleySet<S> {
[INFO] [stdout]     | --------------------------------- associated function in this implementation
[INFO] [stdout] 206 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `rhs` and `eliminate_nulling` are never used
[INFO] [stdout]    --> lib.rs:266:8
[INFO] [stdout]     |
[INFO] [stdout] 214 | impl<const S: usize> Grammar<S> {
[INFO] [stdout]     | ------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 266 |     fn rhs<const N: usize>(&mut self, rhs: [Symbol; N]) -> &mut Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 275 |     fn eliminate_nulling(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> lib.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |     fn last(&self) -> EarleySetRef {
[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] 119 |     fn last(&self) -> EarleySetRef<'_> {
[INFO] [stdout]     |                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> lib.rs:125:21
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn next_to_last(&self) -> EarleySetRef {
[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] 125 |     fn next_to_last(&self) -> EarleySetRef<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> lib.rs:132:17
[INFO] [stdout]     |
[INFO] [stdout] 132 |     fn last_mut(&mut self) -> EarleySetMut {
[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] 132 |     fn last_mut(&mut self) -> EarleySetMut<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:608:13
[INFO] [stdout]     |
[INFO] [stdout] 608 | /             write!(
[INFO] [stdout] 609 | |                 result,
[INFO] [stdout] 610 | |                 "diff {} ::= ",
[INFO] [stdout] 611 | |                 self.tables.symbol_names[self.tables.get_top_lhs(rule_id).usize()]
[INFO] [stdout] 612 | |             );
[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] 608 |             let _ = write!(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:614:17
[INFO] [stdout]     |
[INFO] [stdout] 614 |                 write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 614 |                 let _ = write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:616:13
[INFO] [stdout]     |
[INFO] [stdout] 616 | /             write!(
[INFO] [stdout] 617 | |                 result,
[INFO] [stdout] 618 | |                 " {} ",
[INFO] [stdout] 619 | |                 self.tables.symbol_names[self.tables.get_top_rhs0(rule_id).usize()]
[INFO] [stdout] 620 | |             );
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 616 |             let _ = write!(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:622:17
[INFO] [stdout]     |
[INFO] [stdout] 622 |                 write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 622 |                 let _ = write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:625:17
[INFO] [stdout]     |
[INFO] [stdout] 625 |                 write!(result, " {} ", self.tables.symbol_names[rhs1.usize()]);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 625 |                 let _ = write!(result, " {} ", self.tables.symbol_names[rhs1.usize()]);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:628:17
[INFO] [stdout]     |
[INFO] [stdout] 628 |                 write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 628 |                 let _ = write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:630:13
[INFO] [stdout]     |
[INFO] [stdout] 630 |             writeln!(result, "");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 630 |             let _ = writeln!(result, "");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:633:13
[INFO] [stdout]     |
[INFO] [stdout] 633 |             writeln!(result, "no diff");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 633 |             let _ = writeln!(result, "no diff");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:634:13
[INFO] [stdout]     |
[INFO] [stdout] 634 |             writeln!(result, "");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 634 |             let _ = writeln!(result, "");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:636:13
[INFO] [stdout]     |
[INFO] [stdout] 636 |             writeln!(result, "");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 636 |             let _ = writeln!(result, "");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> forest.rs:122:31
[INFO] [stdout]     |
[INFO] [stdout] 122 |     pub fn evaluator<T: Eval>(&mut self, eval: T) -> Evaluator<T> {
[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] 122 |     pub fn evaluator<T: Eval>(&mut self, eval: T) -> Evaluator<'_, T> {
[INFO] [stdout]     |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.80s
[INFO] running `Command { std: "docker" "inspect" "a6f96d0b82493d21d454fdf844f65bc246ec70c41a82fd3e24dd1ccd7140e953", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6f96d0b82493d21d454fdf844f65bc246ec70c41a82fd3e24dd1ccd7140e953", kill_on_drop: false }`
[INFO] [stdout] a6f96d0b82493d21d454fdf844f65bc246ec70c41a82fd3e24dd1ccd7140e953
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.95.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35f082a2dc74737e04e1ac933fff9febe33ce7901e6ba9c501dc62b4712c0e5e
[INFO] running `Command { std: "docker" "start" "-a" "35f082a2dc74737e04e1ac933fff9febe33ce7901e6ba9c501dc62b4712c0e5e", kill_on_drop: false }`
[INFO] [stdout] warning: unused imports: `Rule` and `Symbol`
[INFO] [stdout]  --> load.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{Rule, Symbol};
[INFO] [stdout]   |             ^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::Grammar`
[INFO] [stdout]  --> load.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use super::Grammar;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_factor`
[INFO] [stdout]    --> forest.rs:203:21
[INFO] [stdout]     |
[INFO] [stdout] 203 |                     right_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: try ignoring the field: `right_factor: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_factor`
[INFO] [stdout]    --> forest.rs:217:21
[INFO] [stdout]     |
[INFO] [stdout] 217 |                     left_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^ help: try ignoring the field: `left_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_factor`
[INFO] [stdout]    --> forest.rs:232:21
[INFO] [stdout]     |
[INFO] [stdout] 232 |                     left_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^ help: try ignoring the field: `left_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_factor`
[INFO] [stdout]    --> forest.rs:233:21
[INFO] [stdout]     |
[INFO] [stdout] 233 |                     right_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: try ignoring the field: `right_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_factor`
[INFO] [stdout]    --> forest.rs:237:21
[INFO] [stdout]     |
[INFO] [stdout] 237 |                     left_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^ help: try ignoring the field: `left_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_factor`
[INFO] [stdout]    --> forest.rs:238:21
[INFO] [stdout]     |
[INFO] [stdout] 238 |                     right_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: try ignoring the field: `right_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> lib.rs:277:13
[INFO] [stdout]     |
[INFO] [stdout] 277 |         let mut rules = self.rules.clone();
[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: `rules`
[INFO] [stdout]    --> lib.rs:277:13
[INFO] [stdout]     |
[INFO] [stdout] 277 |         let mut rules = self.rules.clone();
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rules`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rule`
[INFO] [stdout]    --> lib.rs:644:17
[INFO] [stdout]     |
[INFO] [stdout] 644 |         for (i, rule) in self.tables.rules.iter().enumerate() {
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_rule`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]    --> lib.rs:857:14
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factor`
[INFO] [stdout]    --> lib.rs:857:19
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_factor`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_mul`
[INFO] [stdout]    --> lib.rs:857:27
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_mul`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_div`
[INFO] [stdout]    --> lib.rs:857:35
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_div`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lparen`
[INFO] [stdout]    --> lib.rs:857:43
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_lparen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rparen`
[INFO] [stdout]    --> lib.rs:857:51
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_rparen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_minus`
[INFO] [stdout]    --> lib.rs:857:70
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                      ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_minus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_plus`
[INFO] [stdout]    --> lib.rs:857:80
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_plus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dot`
[INFO] [stdout]    --> lib.rs:857:113
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_dot`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]    --> lib.rs:867:14
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factor`
[INFO] [stdout]    --> lib.rs:867:19
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_factor`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_mul`
[INFO] [stdout]    --> lib.rs:867:27
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_mul`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_div`
[INFO] [stdout]    --> lib.rs:867:35
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_div`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lparen`
[INFO] [stdout]    --> lib.rs:867:43
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_lparen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rparen`
[INFO] [stdout]    --> lib.rs:867:51
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_rparen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_minus`
[INFO] [stdout]    --> lib.rs:867:70
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                      ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_minus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_plus`
[INFO] [stdout]    --> lib.rs:867:80
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_plus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `digit`
[INFO] [stdout]    --> lib.rs:867:106
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_digit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dot`
[INFO] [stdout]    --> lib.rs:867:113
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_dot`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]    --> lib.rs:906:14
[INFO] [stdout]     |
[INFO] [stdout] 906 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factor`
[INFO] [stdout]    --> lib.rs:906:19
[INFO] [stdout]     |
[INFO] [stdout] 906 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_factor`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `CompletedItem` is more private than the item `forest::Forest::push_summand`
[INFO] [stdout]    --> forest.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn push_summand(&mut self, item: CompletedItem) -> NodeHandle {
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method `forest::Forest::push_summand` is reachable at visibility `pub`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `CompletedItem` is only usable at visibility `pub(crate)`
[INFO] [stdout]    --> lib.rs:172:1
[INFO] [stdout]     |
[INFO] [stdout] 172 | struct CompletedItem {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling tiny-earley v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `rhs_nulling` is never read
[INFO] [stdout]   --> lib.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Grammar<const S: usize> {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 27 |     rhs_nulling: Vec<NullingEliminated>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Grammar` has a derived impl for the trait `Clone`, 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: variants `Left`, `Right`, and `Both` are never constructed
[INFO] [stdout]   --> lib.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | enum Side {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 32 |     Left,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 33 |     Right,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 34 |     Both,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Side` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `rule_id`, `sym`, and `side` are never read
[INFO] [stdout]   --> lib.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct NullingEliminated {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] 39 |     rule_id: Option<usize>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 40 |     sym: Symbol,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 41 |     side: Side,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NullingEliminated` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `symbol` is never read
[INFO] [stdout]   --> lib.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | struct PredictionTransition {
[INFO] [stdout]    |        -------------------- field in this struct
[INFO] [stdout] 65 |     symbol: Symbol,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PredictionTransition` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EarleySet` is never constructed
[INFO] [stdout]    --> lib.rs:158:8
[INFO] [stdout]     |
[INFO] [stdout] 158 | struct EarleySet<const S: usize> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> lib.rs:206:8
[INFO] [stdout]     |
[INFO] [stdout] 205 | impl<const S: usize> EarleySet<S> {
[INFO] [stdout]     | --------------------------------- associated function in this implementation
[INFO] [stdout] 206 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `rhs` and `eliminate_nulling` are never used
[INFO] [stdout]    --> lib.rs:266:8
[INFO] [stdout]     |
[INFO] [stdout] 214 | impl<const S: usize> Grammar<S> {
[INFO] [stdout]     | ------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 266 |     fn rhs<const N: usize>(&mut self, rhs: [Symbol; N]) -> &mut Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 275 |     fn eliminate_nulling(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> lib.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |     fn last(&self) -> EarleySetRef {
[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] 119 |     fn last(&self) -> EarleySetRef<'_> {
[INFO] [stdout]     |                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> lib.rs:125:21
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn next_to_last(&self) -> EarleySetRef {
[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] 125 |     fn next_to_last(&self) -> EarleySetRef<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> lib.rs:132:17
[INFO] [stdout]     |
[INFO] [stdout] 132 |     fn last_mut(&mut self) -> EarleySetMut {
[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] 132 |     fn last_mut(&mut self) -> EarleySetMut<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:608:13
[INFO] [stdout]     |
[INFO] [stdout] 608 | /             write!(
[INFO] [stdout] 609 | |                 result,
[INFO] [stdout] 610 | |                 "diff {} ::= ",
[INFO] [stdout] 611 | |                 self.tables.symbol_names[self.tables.get_top_lhs(rule_id).usize()]
[INFO] [stdout] 612 | |             );
[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] 608 |             let _ = write!(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:614:17
[INFO] [stdout]     |
[INFO] [stdout] 614 |                 write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 614 |                 let _ = write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:616:13
[INFO] [stdout]     |
[INFO] [stdout] 616 | /             write!(
[INFO] [stdout] 617 | |                 result,
[INFO] [stdout] 618 | |                 " {} ",
[INFO] [stdout] 619 | |                 self.tables.symbol_names[self.tables.get_top_rhs0(rule_id).usize()]
[INFO] [stdout] 620 | |             );
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 616 |             let _ = write!(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:622:17
[INFO] [stdout]     |
[INFO] [stdout] 622 |                 write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 622 |                 let _ = write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:625:17
[INFO] [stdout]     |
[INFO] [stdout] 625 |                 write!(result, " {} ", self.tables.symbol_names[rhs1.usize()]);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 625 |                 let _ = write!(result, " {} ", self.tables.symbol_names[rhs1.usize()]);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:628:17
[INFO] [stdout]     |
[INFO] [stdout] 628 |                 write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 628 |                 let _ = write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:630:13
[INFO] [stdout]     |
[INFO] [stdout] 630 |             writeln!(result, "");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 630 |             let _ = writeln!(result, "");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:633:13
[INFO] [stdout]     |
[INFO] [stdout] 633 |             writeln!(result, "no diff");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 633 |             let _ = writeln!(result, "no diff");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:634:13
[INFO] [stdout]     |
[INFO] [stdout] 634 |             writeln!(result, "");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 634 |             let _ = writeln!(result, "");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:636:13
[INFO] [stdout]     |
[INFO] [stdout] 636 |             writeln!(result, "");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 636 |             let _ = writeln!(result, "");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> forest.rs:122:31
[INFO] [stdout]     |
[INFO] [stdout] 122 |     pub fn evaluator<T: Eval>(&mut self, eval: T) -> Evaluator<T> {
[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] 122 |     pub fn evaluator<T: Eval>(&mut self, eval: T) -> Evaluator<'_, T> {
[INFO] [stdout]     |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `calc_recognizer`
[INFO] [stdout]    --> lib.rs:953:23
[INFO] [stdout]     |
[INFO] [stdout] 953 |     use super::{calc, calc_recognizer};
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_factor`
[INFO] [stdout]    --> forest.rs:203:21
[INFO] [stdout]     |
[INFO] [stdout] 203 |                     right_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: try ignoring the field: `right_factor: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_factor`
[INFO] [stdout]    --> forest.rs:217:21
[INFO] [stdout]     |
[INFO] [stdout] 217 |                     left_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^ help: try ignoring the field: `left_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_factor`
[INFO] [stdout]    --> forest.rs:232:21
[INFO] [stdout]     |
[INFO] [stdout] 232 |                     left_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^ help: try ignoring the field: `left_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_factor`
[INFO] [stdout]    --> forest.rs:233:21
[INFO] [stdout]     |
[INFO] [stdout] 233 |                     right_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: try ignoring the field: `right_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_factor`
[INFO] [stdout]    --> forest.rs:237:21
[INFO] [stdout]     |
[INFO] [stdout] 237 |                     left_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^ help: try ignoring the field: `left_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right_factor`
[INFO] [stdout]    --> forest.rs:238:21
[INFO] [stdout]     |
[INFO] [stdout] 238 |                     right_factor,
[INFO] [stdout]     |                     ^^^^^^^^^^^^ help: try ignoring the field: `right_factor: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]   --> load.rs:37:10
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let [start, a, b, c, d] = grammar.symbols();
[INFO] [stdout]    |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> load.rs:37:17
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let [start, a, b, c, d] = grammar.symbols();
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> load.rs:37:20
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let [start, a, b, c, d] = grammar.symbols();
[INFO] [stdout]    |                    ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> load.rs:37:23
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let [start, a, b, c, d] = grammar.symbols();
[INFO] [stdout]    |                       ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> load.rs:37:26
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let [start, a, b, c, d] = grammar.symbols();
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> lib.rs:277:13
[INFO] [stdout]     |
[INFO] [stdout] 277 |         let mut rules = self.rules.clone();
[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: `rules`
[INFO] [stdout]    --> lib.rs:277:13
[INFO] [stdout]     |
[INFO] [stdout] 277 |         let mut rules = self.rules.clone();
[INFO] [stdout]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rules`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rule`
[INFO] [stdout]    --> lib.rs:644:17
[INFO] [stdout]     |
[INFO] [stdout] 644 |         for (i, rule) in self.tables.rules.iter().enumerate() {
[INFO] [stdout]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_rule`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]    --> lib.rs:857:14
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factor`
[INFO] [stdout]    --> lib.rs:857:19
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_factor`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_mul`
[INFO] [stdout]    --> lib.rs:857:27
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_mul`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_div`
[INFO] [stdout]    --> lib.rs:857:35
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_div`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lparen`
[INFO] [stdout]    --> lib.rs:857:43
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_lparen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rparen`
[INFO] [stdout]    --> lib.rs:857:51
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_rparen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_minus`
[INFO] [stdout]    --> lib.rs:857:70
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                      ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_minus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_plus`
[INFO] [stdout]    --> lib.rs:857:80
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_plus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dot`
[INFO] [stdout]    --> lib.rs:857:113
[INFO] [stdout]     |
[INFO] [stdout] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_dot`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]    --> lib.rs:867:14
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factor`
[INFO] [stdout]    --> lib.rs:867:19
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_factor`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_mul`
[INFO] [stdout]    --> lib.rs:867:27
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_mul`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_div`
[INFO] [stdout]    --> lib.rs:867:35
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_div`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lparen`
[INFO] [stdout]    --> lib.rs:867:43
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_lparen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rparen`
[INFO] [stdout]    --> lib.rs:867:51
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_rparen`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_minus`
[INFO] [stdout]    --> lib.rs:867:70
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                      ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_minus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op_plus`
[INFO] [stdout]    --> lib.rs:867:80
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_plus`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `digit`
[INFO] [stdout]    --> lib.rs:867:106
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_digit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dot`
[INFO] [stdout]    --> lib.rs:867:113
[INFO] [stdout]     |
[INFO] [stdout] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                                                                                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_dot`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]    --> lib.rs:906:14
[INFO] [stdout]     |
[INFO] [stdout] 906 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factor`
[INFO] [stdout]    --> lib.rs:906:19
[INFO] [stdout]     |
[INFO] [stdout] 906 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_factor`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `CompletedItem` is more private than the item `forest::Forest::push_summand`
[INFO] [stdout]    --> forest.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout] 111 |     pub fn push_summand(&mut self, item: CompletedItem) -> NodeHandle {
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method `forest::Forest::push_summand` is reachable at visibility `pub`
[INFO] [stdout]     |
[INFO] [stdout] note: but type `CompletedItem` is only usable at visibility `pub(crate)`
[INFO] [stdout]    --> lib.rs:172:1
[INFO] [stdout]     |
[INFO] [stdout] 172 | struct CompletedItem {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `rhs_nulling` is never read
[INFO] [stdout]   --> lib.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Grammar<const S: usize> {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 27 |     rhs_nulling: Vec<NullingEliminated>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Grammar` has a derived impl for the trait `Clone`, 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: variants `Left`, `Right`, and `Both` are never constructed
[INFO] [stdout]   --> lib.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 31 | enum Side {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 32 |     Left,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 33 |     Right,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 34 |     Both,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Side` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `rule_id`, `sym`, and `side` are never read
[INFO] [stdout]   --> lib.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct NullingEliminated {
[INFO] [stdout]    |        ----------------- fields in this struct
[INFO] [stdout] 39 |     rule_id: Option<usize>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 40 |     sym: Symbol,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 41 |     side: Side,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `NullingEliminated` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `symbol` is never read
[INFO] [stdout]   --> lib.rs:65:5
[INFO] [stdout]    |
[INFO] [stdout] 64 | struct PredictionTransition {
[INFO] [stdout]    |        -------------------- field in this struct
[INFO] [stdout] 65 |     symbol: Symbol,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PredictionTransition` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EarleySet` is never constructed
[INFO] [stdout]    --> lib.rs:158:8
[INFO] [stdout]     |
[INFO] [stdout] 158 | struct EarleySet<const S: usize> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> lib.rs:206:8
[INFO] [stdout]     |
[INFO] [stdout] 205 | impl<const S: usize> EarleySet<S> {
[INFO] [stdout]     | --------------------------------- associated function in this implementation
[INFO] [stdout] 206 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `rhs` and `eliminate_nulling` are never used
[INFO] [stdout]    --> lib.rs:266:8
[INFO] [stdout]     |
[INFO] [stdout] 214 | impl<const S: usize> Grammar<S> {
[INFO] [stdout]     | ------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 266 |     fn rhs<const N: usize>(&mut self, rhs: [Symbol; N]) -> &mut Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 275 |     fn eliminate_nulling(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> lib.rs:119:13
[INFO] [stdout]     |
[INFO] [stdout] 119 |     fn last(&self) -> EarleySetRef {
[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] 119 |     fn last(&self) -> EarleySetRef<'_> {
[INFO] [stdout]     |                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> lib.rs:125:21
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn next_to_last(&self) -> EarleySetRef {
[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] 125 |     fn next_to_last(&self) -> EarleySetRef<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> lib.rs:132:17
[INFO] [stdout]     |
[INFO] [stdout] 132 |     fn last_mut(&mut self) -> EarleySetMut {
[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] 132 |     fn last_mut(&mut self) -> EarleySetMut<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:608:13
[INFO] [stdout]     |
[INFO] [stdout] 608 | /             write!(
[INFO] [stdout] 609 | |                 result,
[INFO] [stdout] 610 | |                 "diff {} ::= ",
[INFO] [stdout] 611 | |                 self.tables.symbol_names[self.tables.get_top_lhs(rule_id).usize()]
[INFO] [stdout] 612 | |             );
[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] 608 |             let _ = write!(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:614:17
[INFO] [stdout]     |
[INFO] [stdout] 614 |                 write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 614 |                 let _ = write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:616:13
[INFO] [stdout]     |
[INFO] [stdout] 616 | /             write!(
[INFO] [stdout] 617 | |                 result,
[INFO] [stdout] 618 | |                 " {} ",
[INFO] [stdout] 619 | |                 self.tables.symbol_names[self.tables.get_top_rhs0(rule_id).usize()]
[INFO] [stdout] 620 | |             );
[INFO] [stdout]     | |_____________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 616 |             let _ = write!(
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:622:17
[INFO] [stdout]     |
[INFO] [stdout] 622 |                 write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 622 |                 let _ = write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:625:17
[INFO] [stdout]     |
[INFO] [stdout] 625 |                 write!(result, " {} ", self.tables.symbol_names[rhs1.usize()]);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 625 |                 let _ = write!(result, " {} ", self.tables.symbol_names[rhs1.usize()]);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:628:17
[INFO] [stdout]     |
[INFO] [stdout] 628 |                 write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 628 |                 let _ = write!(result, "{:?}=>{:?}", a, b);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:630:13
[INFO] [stdout]     |
[INFO] [stdout] 630 |             writeln!(result, "");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 630 |             let _ = writeln!(result, "");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:633:13
[INFO] [stdout]     |
[INFO] [stdout] 633 |             writeln!(result, "no diff");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 633 |             let _ = writeln!(result, "no diff");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:634:13
[INFO] [stdout]     |
[INFO] [stdout] 634 |             writeln!(result, "");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 634 |             let _ = writeln!(result, "");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> lib.rs:636:13
[INFO] [stdout]     |
[INFO] [stdout] 636 |             writeln!(result, "");
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 636 |             let _ = writeln!(result, "");
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> forest.rs:122:31
[INFO] [stdout]     |
[INFO] [stdout] 122 |     pub fn evaluator<T: Eval>(&mut self, eval: T) -> Evaluator<T> {
[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] 122 |     pub fn evaluator<T: Eval>(&mut self, eval: T) -> Evaluator<'_, T> {
[INFO] [stdout]     |                                                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `Command { std: "docker" "inspect" "35f082a2dc74737e04e1ac933fff9febe33ce7901e6ba9c501dc62b4712c0e5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35f082a2dc74737e04e1ac933fff9febe33ce7901e6ba9c501dc62b4712c0e5e", kill_on_drop: false }`
[INFO] [stdout] 35f082a2dc74737e04e1ac933fff9febe33ce7901e6ba9c501dc62b4712c0e5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.95.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 06f57b2f0407f224b93a65848d017bf9b32b7bea419758715b29c61acf7e52cf
[INFO] running `Command { std: "docker" "start" "-a" "06f57b2f0407f224b93a65848d017bf9b32b7bea419758715b29c61acf7e52cf", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Rule` and `Symbol`
[INFO] [stderr]  --> load.rs:1:13
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::{Rule, Symbol};
[INFO] [stderr]   |             ^^^^  ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::Grammar`
[INFO] [stderr]  --> load.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use super::Grammar;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right_factor`
[INFO] [stderr]    --> forest.rs:203:21
[INFO] [stderr]     |
[INFO] [stderr] 203 |                     right_factor,
[INFO] [stderr]     |                     ^^^^^^^^^^^^ help: try ignoring the field: `right_factor: _`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left_factor`
[INFO] [stderr]    --> forest.rs:217:21
[INFO] [stderr]     |
[INFO] [stderr] 217 |                     left_factor,
[INFO] [stderr]     |                     ^^^^^^^^^^^ help: try ignoring the field: `left_factor: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left_factor`
[INFO] [stderr]    --> forest.rs:232:21
[INFO] [stderr]     |
[INFO] [stderr] 232 |                     left_factor,
[INFO] [stderr]     |                     ^^^^^^^^^^^ help: try ignoring the field: `left_factor: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right_factor`
[INFO] [stderr]    --> forest.rs:233:21
[INFO] [stderr]     |
[INFO] [stderr] 233 |                     right_factor,
[INFO] [stderr]     |                     ^^^^^^^^^^^^ help: try ignoring the field: `right_factor: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `left_factor`
[INFO] [stderr]    --> forest.rs:237:21
[INFO] [stderr]     |
[INFO] [stderr] 237 |                     left_factor,
[INFO] [stderr]     |                     ^^^^^^^^^^^ help: try ignoring the field: `left_factor: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `right_factor`
[INFO] [stderr]    --> forest.rs:238:21
[INFO] [stderr]     |
[INFO] [stderr] 238 |                     right_factor,
[INFO] [stderr]     |                     ^^^^^^^^^^^^ help: try ignoring the field: `right_factor: _`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> lib.rs:277:13
[INFO] [stderr]     |
[INFO] [stderr] 277 |         let mut rules = self.rules.clone();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rules`
[INFO] [stderr]    --> lib.rs:277:13
[INFO] [stderr]     |
[INFO] [stderr] 277 |         let mut rules = self.rules.clone();
[INFO] [stderr]     |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_rules`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rule`
[INFO] [stderr]    --> lib.rs:644:17
[INFO] [stderr]     |
[INFO] [stderr] 644 |         for (i, rule) in self.tables.rules.iter().enumerate() {
[INFO] [stderr]     |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_rule`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sum`
[INFO] [stderr]    --> lib.rs:857:14
[INFO] [stderr]     |
[INFO] [stderr] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `factor`
[INFO] [stderr]    --> lib.rs:857:19
[INFO] [stderr]     |
[INFO] [stderr] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_factor`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op_mul`
[INFO] [stderr]    --> lib.rs:857:27
[INFO] [stderr]     |
[INFO] [stderr] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_mul`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op_div`
[INFO] [stderr]    --> lib.rs:857:35
[INFO] [stderr]     |
[INFO] [stderr] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_div`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lparen`
[INFO] [stderr]    --> lib.rs:857:43
[INFO] [stderr]     |
[INFO] [stderr] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_lparen`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rparen`
[INFO] [stderr]    --> lib.rs:857:51
[INFO] [stderr]     |
[INFO] [stderr] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_rparen`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op_minus`
[INFO] [stderr]    --> lib.rs:857:70
[INFO] [stderr]     |
[INFO] [stderr] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                                                                      ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_minus`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op_plus`
[INFO] [stderr]    --> lib.rs:857:80
[INFO] [stderr]     |
[INFO] [stderr] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                                                                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_plus`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dot`
[INFO] [stderr]    --> lib.rs:857:113
[INFO] [stderr]     |
[INFO] [stderr] 857 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                                                                                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_dot`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sum`
[INFO] [stderr]    --> lib.rs:867:14
[INFO] [stderr]     |
[INFO] [stderr] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `factor`
[INFO] [stderr]    --> lib.rs:867:19
[INFO] [stderr]     |
[INFO] [stderr] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_factor`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op_mul`
[INFO] [stderr]    --> lib.rs:867:27
[INFO] [stderr]     |
[INFO] [stderr] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_mul`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op_div`
[INFO] [stderr]    --> lib.rs:867:35
[INFO] [stderr]     |
[INFO] [stderr] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_div`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lparen`
[INFO] [stderr]    --> lib.rs:867:43
[INFO] [stderr]     |
[INFO] [stderr] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_lparen`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rparen`
[INFO] [stderr]    --> lib.rs:867:51
[INFO] [stderr]     |
[INFO] [stderr] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stdout] 
[INFO] [stderr]     |                                                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_rparen`
[INFO] [stdout] running 3 tests
[INFO] [stderr] 
[INFO] [stdout] test load::grammar ... ok
[INFO] [stderr] warning: unused variable: `op_minus`
[INFO] [stdout] test test::test_parse ... ok
[INFO] [stderr]    --> lib.rs:867:70
[INFO] [stderr]     |
[INFO] [stderr] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                                                                      ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_minus`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op_plus`
[INFO] [stderr]    --> lib.rs:867:80
[INFO] [stderr]     |
[INFO] [stderr] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                                                                                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_plus`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `digit`
[INFO] [stderr]    --> lib.rs:867:106
[INFO] [stderr]     |
[INFO] [stderr] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                                                                                                          ^^^^^ help: if this is intentional, prefix it with an underscore: `_digit`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dot`
[INFO] [stderr]    --> lib.rs:867:113
[INFO] [stderr]     |
[INFO] [stderr] 867 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                                                                                                                 ^^^ help: if this is intentional, prefix it with an underscore: `_dot`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sum`
[INFO] [stderr]    --> lib.rs:906:14
[INFO] [stderr]     |
[INFO] [stderr] 906 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |              ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `factor`
[INFO] [stderr]    --> lib.rs:906:19
[INFO] [stderr]     |
[INFO] [stderr] 906 |         let [sum, factor, op_mul, op_div, lparen, rparen, _expr_sym, op_minus, op_plus, _number, _whole, digit, dot] =
[INFO] [stderr]     |                   ^^^^^^ help: if this is intentional, prefix it with an underscore: `_factor`
[INFO] [stderr] 
[INFO] [stderr] warning: type `CompletedItem` is more private than the item `forest::Forest::push_summand`
[INFO] [stderr]    --> forest.rs:111:5
[INFO] [stderr]     |
[INFO] [stderr] 111 |     pub fn push_summand(&mut self, item: CompletedItem) -> NodeHandle {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method `forest::Forest::push_summand` is reachable at visibility `pub`
[INFO] [stderr]     |
[INFO] [stderr] note: but type `CompletedItem` is only usable at visibility `pub(crate)`
[INFO] [stderr]    --> lib.rs:172:1
[INFO] [stderr]     |
[INFO] [stderr] 172 | struct CompletedItem {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = note: `#[warn(private_interfaces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `rhs_nulling` is never read
[INFO] [stderr]   --> lib.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Grammar<const S: usize> {
[INFO] [stderr]    |            ------- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 27 |     rhs_nulling: Vec<NullingEliminated>,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Grammar` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Left`, `Right`, and `Both` are never constructed
[INFO] [stderr]   --> lib.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 31 | enum Side {
[INFO] [stderr]    |      ---- variants in this enum
[INFO] [stderr] 32 |     Left,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 33 |     Right,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 34 |     Both,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Side` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `rule_id`, `sym`, and `side` are never read
[INFO] [stderr]   --> lib.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 38 | struct NullingEliminated {
[INFO] [stderr]    |        ----------------- fields in this struct
[INFO] [stderr] 39 |     rule_id: Option<usize>,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 40 |     sym: Symbol,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 41 |     side: Side,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `NullingEliminated` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `symbol` is never read
[INFO] [stderr]   --> lib.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 64 | struct PredictionTransition {
[INFO] [stderr]    |        -------------------- field in this struct
[INFO] [stderr] 65 |     symbol: Symbol,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `PredictionTransition` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: struct `EarleySet` is never constructed
[INFO] [stderr]    --> lib.rs:158:8
[INFO] [stderr]     |
[INFO] [stderr] 158 | struct EarleySet<const S: usize> {
[INFO] [stderr]     |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]    --> lib.rs:206:8
[INFO] [stderr]     |
[INFO] [stderr] 205 | impl<const S: usize> EarleySet<S> {
[INFO] [stderr]     | --------------------------------- associated function in this implementation
[INFO] [stderr] 206 |     fn new() -> Self {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `rhs` and `eliminate_nulling` are never used
[INFO] [stderr]    --> lib.rs:266:8
[INFO] [stderr]     |
[INFO] [stderr] 214 | impl<const S: usize> Grammar<S> {
[INFO] [stderr]     | ------------------------------- methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 266 |     fn rhs<const N: usize>(&mut self, rhs: [Symbol; N]) -> &mut Self {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 275 |     fn eliminate_nulling(&mut self) {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> lib.rs:119:13
[INFO] [stderr]     |
[INFO] [stderr] 119 |     fn last(&self) -> EarleySetRef {
[INFO] [stderr]     |             ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |             |
[INFO] [stderr]     |             the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 119 |     fn last(&self) -> EarleySetRef<'_> {
[INFO] [stderr]     |                                   ++++
[INFO] [stderr] 
[INFO] [stdout] test test::test_parse_big ... ok
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout] 
[INFO] [stderr]    --> lib.rs:125:21
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stderr]     |
[INFO] [stdout] 
[INFO] [stderr] 125 |     fn next_to_last(&self) -> EarleySetRef {
[INFO] [stderr]     |                     ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 125 |     fn next_to_last(&self) -> EarleySetRef<'_> {
[INFO] [stderr]     |                                           ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> lib.rs:132:17
[INFO] [stderr]     |
[INFO] [stderr] 132 |     fn last_mut(&mut self) -> EarleySetMut {
[INFO] [stderr]     |                 ^^^^^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 132 |     fn last_mut(&mut self) -> EarleySetMut<'_> {
[INFO] [stderr]     |                                           ++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> lib.rs:608:13
[INFO] [stderr]     |
[INFO] [stderr] 608 | /             write!(
[INFO] [stderr] 609 | |                 result,
[INFO] [stderr] 610 | |                 "diff {} ::= ",
[INFO] [stderr] 611 | |                 self.tables.symbol_names[self.tables.get_top_lhs(rule_id).usize()]
[INFO] [stderr] 612 | |             );
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 608 |             let _ = write!(
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> lib.rs:614:17
[INFO] [stderr]     |
[INFO] [stderr] 614 |                 write!(result, "{:?}=>{:?}", a, b);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 614 |                 let _ = write!(result, "{:?}=>{:?}", a, b);
[INFO] [stderr]     |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> lib.rs:616:13
[INFO] [stderr]     |
[INFO] [stderr] 616 | /             write!(
[INFO] [stderr] 617 | |                 result,
[INFO] [stderr] 618 | |                 " {} ",
[INFO] [stderr] 619 | |                 self.tables.symbol_names[self.tables.get_top_rhs0(rule_id).usize()]
[INFO] [stderr] 620 | |             );
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 616 |             let _ = write!(
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> lib.rs:622:17
[INFO] [stderr]     |
[INFO] [stderr] 622 |                 write!(result, "{:?}=>{:?}", a, b);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 622 |                 let _ = write!(result, "{:?}=>{:?}", a, b);
[INFO] [stderr]     |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> lib.rs:625:17
[INFO] [stderr]     |
[INFO] [stderr] 625 |                 write!(result, " {} ", self.tables.symbol_names[rhs1.usize()]);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 625 |                 let _ = write!(result, " {} ", self.tables.symbol_names[rhs1.usize()]);
[INFO] [stderr]     |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> lib.rs:628:17
[INFO] [stderr]     |
[INFO] [stderr] 628 |                 write!(result, "{:?}=>{:?}", a, b);
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 628 |                 let _ = write!(result, "{:?}=>{:?}", a, b);
[INFO] [stderr]     |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> lib.rs:630:13
[INFO] [stderr]     |
[INFO] [stderr] 630 |             writeln!(result, "");
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 630 |             let _ = writeln!(result, "");
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> lib.rs:633:13
[INFO] [stderr]     |
[INFO] [stderr] 633 |             writeln!(result, "no diff");
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 633 |             let _ = writeln!(result, "no diff");
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> lib.rs:634:13
[INFO] [stderr]     |
[INFO] [stderr] 634 |             writeln!(result, "");
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 634 |             let _ = writeln!(result, "");
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]    --> lib.rs:636:13
[INFO] [stderr]     |
[INFO] [stderr] 636 |             writeln!(result, "");
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 636 |             let _ = writeln!(result, "");
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> forest.rs:122:31
[INFO] [stderr]     |
[INFO] [stderr] 122 |     pub fn evaluator<T: Eval>(&mut self, eval: T) -> Evaluator<T> {
[INFO] [stderr]     |                               ^^^^^^^^^              ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                               |
[INFO] [stderr]     |                               the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 122 |     pub fn evaluator<T: Eval>(&mut self, eval: T) -> Evaluator<'_, T> {
[INFO] [stderr]     |                                                                +++
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `calc_recognizer`
[INFO] [stderr]    --> lib.rs:953:23
[INFO] [stderr]     |
[INFO] [stderr] 953 |     use super::{calc, calc_recognizer};
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start`
[INFO] [stderr]   --> load.rs:37:10
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let [start, a, b, c, d] = grammar.symbols();
[INFO] [stderr]    |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> load.rs:37:17
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let [start, a, b, c, d] = grammar.symbols();
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> load.rs:37:20
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let [start, a, b, c, d] = grammar.symbols();
[INFO] [stderr]    |                    ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> load.rs:37:23
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let [start, a, b, c, d] = grammar.symbols();
[INFO] [stderr]    |                       ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]   --> load.rs:37:26
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let [start, a, b, c, d] = grammar.symbols();
[INFO] [stderr]    |                          ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: `tiny-earley` (lib) generated 54 warnings (run `cargo fix --lib -p tiny-earley` to apply 36 suggestions)
[INFO] [stderr] warning: `tiny-earley` (lib test) generated 58 warnings (52 duplicates) (run `cargo fix --lib -p tiny-earley --tests` to apply 6 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests lib.rs (/opt/rustwide/target/debug/deps/tiny_earley-fb85aaedfd996d75)
[INFO] [stderr]    Doc-tests tiny_earley
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "06f57b2f0407f224b93a65848d017bf9b32b7bea419758715b29c61acf7e52cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06f57b2f0407f224b93a65848d017bf9b32b7bea419758715b29c61acf7e52cf", kill_on_drop: false }`
[INFO] [stdout] 06f57b2f0407f224b93a65848d017bf9b32b7bea419758715b29c61acf7e52cf
