[INFO] fetching crate tiny-earley 0.2.0...
[INFO] building tiny-earley-0.2.0 against master#ad85bc524b1ad696e42061ad8338d382dffbdbe5 for pr-146237-1
[INFO] extracting crate tiny-earley 0.2.0 into /workspace/builds/worker-5-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-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tiny-earley 0.2.0 on toolchain ad85bc524b1ad696e42061ad8338d382dffbdbe5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "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" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded c_lexer_logos v0.1.1
[INFO] [stderr]   Downloaded logos-derive v0.13.0
[INFO] [stderr]   Downloaded internship v0.6.0
[INFO] [stderr]   Downloaded logos v0.13.0
[INFO] [stderr]   Downloaded logos-codegen v0.13.0
[INFO] [stderr]   Downloaded elsa v1.11.2
[INFO] [stderr]   Downloaded syn v2.0.103
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 43b39ea7629bcca3d1b352f63aa18e31d157b1a7fdd302747c47adfe6c937901
[INFO] running `Command { std: "docker" "start" "-a" "43b39ea7629bcca3d1b352f63aa18e31d157b1a7fdd302747c47adfe6c937901", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43b39ea7629bcca3d1b352f63aa18e31d157b1a7fdd302747c47adfe6c937901", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43b39ea7629bcca3d1b352f63aa18e31d157b1a7fdd302747c47adfe6c937901", kill_on_drop: false }`
[INFO] [stdout] 43b39ea7629bcca3d1b352f63aa18e31d157b1a7fdd302747c47adfe6c937901
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05362fef1c9e50db010ec3917599a496a820009bfee85cdb80184b92f6761999
[INFO] running `Command { std: "docker" "start" "-a" "05362fef1c9e50db010ec3917599a496a820009bfee85cdb80184b92f6761999", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.103
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling beef v0.5.2
[INFO] [stderr]    Compiling hashbrown v0.15.4
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling log v0.4.27
[INFO] [stderr]    Compiling internship v0.6.0
[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 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: unused variable: `rules`
[INFO] [stdout]    --> lib.rs:277:17
[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: 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: `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 6.06s
[INFO] running `Command { std: "docker" "inspect" "05362fef1c9e50db010ec3917599a496a820009bfee85cdb80184b92f6761999", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05362fef1c9e50db010ec3917599a496a820009bfee85cdb80184b92f6761999", kill_on_drop: false }`
[INFO] [stdout] 05362fef1c9e50db010ec3917599a496a820009bfee85cdb80184b92f6761999
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ad85bc524b1ad696e42061ad8338d382dffbdbe5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 859f1c4c7b8a8dc50517ecc672631d7586c67de24a1b1d096408e3df2776b109
[INFO] running `Command { std: "docker" "start" "-a" "859f1c4c7b8a8dc50517ecc672631d7586c67de24a1b1d096408e3df2776b109", 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: unused variable: `rules`
[INFO] [stdout]    --> lib.rs:277:17
[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: 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: `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] [stderr]    Compiling tiny-earley v0.2.0 (/opt/rustwide/workdir)
[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: unused variable: `rules`
[INFO] [stdout]    --> lib.rs:277:17
[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: 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: `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 0.61s
[INFO] running `Command { std: "docker" "inspect" "859f1c4c7b8a8dc50517ecc672631d7586c67de24a1b1d096408e3df2776b109", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "859f1c4c7b8a8dc50517ecc672631d7586c67de24a1b1d096408e3df2776b109", kill_on_drop: false }`
[INFO] [stdout] 859f1c4c7b8a8dc50517ecc672631d7586c67de24a1b1d096408e3df2776b109
