[INFO] cloning repository https://github.com/wormtql/rusty-parser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wormtql/rusty-parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwormtql%2Frusty-parser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwormtql%2Frusty-parser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6b89732ee14c9ee5ed1f9eead2e8d7838cd850d0
[INFO] checking wormtql/rusty-parser against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwormtql%2Frusty-parser" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wormtql/rusty-parser on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wormtql/rusty-parser
[INFO] finished tweaking git repo https://github.com/wormtql/rusty-parser
[INFO] tweaked toml for git repo https://github.com/wormtql/rusty-parser written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/wormtql/rusty-parser 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b3b3e2a599172a09f9dc4087f104a40633e6f5b1e9ed6d12340feb47eecef692
[INFO] running `Command { std: "docker" "start" "-a" "b3b3e2a599172a09f9dc4087f104a40633e6f5b1e9ed6d12340feb47eecef692", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3b3e2a599172a09f9dc4087f104a40633e6f5b1e9ed6d12340feb47eecef692", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3b3e2a599172a09f9dc4087f104a40633e6f5b1e9ed6d12340feb47eecef692", kill_on_drop: false }`
[INFO] [stdout] b3b3e2a599172a09f9dc4087f104a40633e6f5b1e9ed6d12340feb47eecef692
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86be78d12d32e2462eec3643cd8cc58e45b9bb8a31e45bab5e5f3ec19f5e65d0
[INFO] running `Command { std: "docker" "start" "-a" "86be78d12d32e2462eec3643cd8cc58e45b9bb8a31e45bab5e5f3ec19f5e65d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking encode_unicode v0.3.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]     Checking bstr v0.2.12
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]     Checking grammar v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> src/ll_table/mod.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                                 ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `NonLeafNode`
[INFO] [stdout]  --> src/ll_table/mod.rs:4:36
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::parse_tree::{ParseTree, NonLeafNode};
[INFO] [stdout]   |                                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> src/lr_table/mod.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                                 ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> src/lr_table/lalr_table.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                                 ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/lr0/lr0_item_set_family.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::thread_rng`
[INFO] [stdout]  --> src/lr0/lr0_item_set_family.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use rand::thread_rng;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `VecDeque`
[INFO] [stdout]  --> src/lr1/lr1_item_set_family.rs:7:33
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::collections::{HashMap, VecDeque};
[INFO] [stdout]   |                                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::thread_rng`
[INFO] [stdout]   --> src/lr1/lr1_item_set_family.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use rand::thread_rng;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::lr1_item_set::LR1ItemSet`
[INFO] [stdout]  --> src/lr1/mod.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use self::lr1_item_set::LR1ItemSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::grammar::letter::Letter`
[INFO] [stdout]  --> src/parse_tree/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::grammar::letter::Letter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ActionTableItem` and `LRTable`
[INFO] [stdout]  --> src/parse_tree/mod.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::lr_table::{LRTable, ActionTableItem};
[INFO] [stdout]   |                       ^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TokenStream`
[INFO] [stdout]  --> src/parse_tree/mod.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::utils`
[INFO] [stdout]  --> src/automaton/dfa.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::utils;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/automaton/dfa.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |         'bigloop: loop {
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_labels)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/automaton/dfa.rs:130:13
[INFO] [stdout]     |
[INFO] [stdout] 130 |             'everysplit: for p in split.iter() {
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/automaton/dfa.rs:131:17
[INFO] [stdout]     |
[INFO] [stdout] 131 |                 'everyletter: for letter in self.letters.iter() {
[INFO] [stdout]     |                 ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::utils`
[INFO] [stdout]  --> src/optimization/du.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::utils;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> src/ll_table/mod.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                                 ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `NonLeafNode`
[INFO] [stdout]  --> src/ll_table/mod.rs:4:36
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::parse_tree::{ParseTree, NonLeafNode};
[INFO] [stdout]   |                                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> src/lr_table/mod.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                                 ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> src/lr_table/lalr_table.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                                 ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/lr0/lr0_item_set_family.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::thread_rng`
[INFO] [stdout]  --> src/lr0/lr0_item_set_family.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use rand::thread_rng;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `VecDeque`
[INFO] [stdout]  --> src/lr1/lr1_item_set_family.rs:7:33
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::collections::{HashMap, VecDeque};
[INFO] [stdout]   |                                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::thread_rng`
[INFO] [stdout]   --> src/lr1/lr1_item_set_family.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use rand::thread_rng;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::lr1_item_set::LR1ItemSet`
[INFO] [stdout]  --> src/lr1/mod.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use self::lr1_item_set::LR1ItemSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::grammar::letter::Letter`
[INFO] [stdout]  --> src/parse_tree/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::grammar::letter::Letter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ActionTableItem` and `LRTable`
[INFO] [stdout]  --> src/parse_tree/mod.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::lr_table::{LRTable, ActionTableItem};
[INFO] [stdout]   |                       ^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TokenStream`
[INFO] [stdout]  --> src/parse_tree/mod.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::utils`
[INFO] [stdout]  --> src/automaton/dfa.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::utils;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/automaton/dfa.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |         'bigloop: loop {
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_labels)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/automaton/dfa.rs:130:13
[INFO] [stdout]     |
[INFO] [stdout] 130 |             'everysplit: for p in split.iter() {
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/automaton/dfa.rs:131:17
[INFO] [stdout]     |
[INFO] [stdout] 131 |                 'everyletter: for letter in self.letters.iter() {
[INFO] [stdout]     |                 ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::utils`
[INFO] [stdout]  --> src/optimization/du.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::utils;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/grammar/letter.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let mut temp = match self {
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/grammar/letter.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let mut temp = match self {
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tree_stack`
[INFO] [stdout]   --> src/ll_table/mod.rs:80:17
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let mut tree_stack: Vec<ParseTree> = Vec::new();
[INFO] [stdout]    |                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_tree_stack`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ll_table/mod.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let mut tree_stack: Vec<ParseTree> = Vec::new();
[INFO] [stdout]    |             ----^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lr_table/lalr_table.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let mut letter_stream: Vec<Letter> = token_stream.stream.iter().map(
[INFO] [stdout]    |             ----^^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tree_stack`
[INFO] [stdout]   --> src/ll_table/mod.rs:80:17
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let mut tree_stack: Vec<ParseTree> = Vec::new();
[INFO] [stdout]    |                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_tree_stack`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr_table/mod.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut letter_stream: Vec<Letter> = token_stream.stream.iter().map(
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ll_table/mod.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let mut tree_stack: Vec<ParseTree> = Vec::new();
[INFO] [stdout]    |             ----^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr_table/mod.rs:292:13
[INFO] [stdout]     |
[INFO] [stdout] 292 |         let mut letter_stream: Vec<Letter> = token_stream.stream.iter().map(
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lr_table/lalr_table.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let mut letter_stream: Vec<Letter> = token_stream.stream.iter().map(
[INFO] [stdout]    |             ----^^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr0/lr0_item_set_family.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 |             let mut shuffle = &mut signs[..];
[INFO] [stdout]     |                 ----^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr_table/mod.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut letter_stream: Vec<Letter> = token_stream.stream.iter().map(
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr_table/mod.rs:292:13
[INFO] [stdout]     |
[INFO] [stdout] 292 |         let mut letter_stream: Vec<Letter> = token_stream.stream.iter().map(
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr1/lr1_item_set_family.rs:109:17
[INFO] [stdout]     |
[INFO] [stdout] 109 |             let mut shuffle = &mut signs[..];
[INFO] [stdout]     |                 ----^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lr1/mod.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 |     for (i, item_set) in data.item_sets.iter().enumerate() {
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr0/lr0_item_set_family.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 |             let mut shuffle = &mut signs[..];
[INFO] [stdout]     |                 ----^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr1/lr1_item_set_family.rs:109:17
[INFO] [stdout]     |
[INFO] [stdout] 109 |             let mut shuffle = &mut signs[..];
[INFO] [stdout]     |                 ----^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lr1/mod.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 |     for (i, item_set) in data.item_sets.iter().enumerate() {
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/optimization/dominant.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     for i in 0..lines.len() {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `uses`
[INFO] [stdout]   --> src/optimization/ud.rs:56:27
[INFO] [stdout]    |
[INFO] [stdout] 56 |         for (point, left, uses) in block.iter() {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_uses`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/parse_tree/mod.rs:75:17
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 state.serialize_field("children", &n.children);
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 let _ = state.serialize_field("children", &n.children);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/optimization/dominant.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     for i in 0..lines.len() {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `uses`
[INFO] [stdout]   --> src/optimization/ud.rs:56:27
[INFO] [stdout]    |
[INFO] [stdout] 56 |         for (point, left, uses) in block.iter() {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_uses`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/parse_tree/mod.rs:75:17
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 state.serialize_field("children", &n.children);
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 let _ = state.serialize_field("children", &n.children);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `grammar::lr_table::LRTable`
[INFO] [stdout]   --> src/bin/exam.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use grammar::lr_table::LRTable;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `grammar::parse_tree::ParseTree`
[INFO] [stdout]   --> src/bin/exam.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use grammar::parse_tree::ParseTree;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]   --> src/bin/exam.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | use std::fs::File;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]   --> src/bin/exam.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | use std::fs;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `grammar::lr_table::LRTable`
[INFO] [stdout]   --> src/bin/exam.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use grammar::lr_table::LRTable;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `grammar::parse_tree::ParseTree`
[INFO] [stdout]   --> src/bin/exam.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use grammar::parse_tree::ParseTree;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]   --> src/bin/exam.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | use std::fs::File;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs`
[INFO] [stdout]   --> src/bin/exam.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | use std::fs;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `grammar::first_follow_set::FirstFollowSet`
[INFO] [stdout]  --> src/bin/parser.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use grammar::first_follow_set::FirstFollowSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `grammar::lr0::lr0_item_set_family::LR0ItemSetFamily`
[INFO] [stdout]  --> src/bin/parser.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use grammar::lr0::lr0_item_set_family::LR0ItemSetFamily;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `grammar::lr1::lr1_item_set_family::LR1ItemSetFamily`
[INFO] [stdout]  --> src/bin/parser.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use grammar::lr1::lr1_item_set_family::LR1ItemSetFamily;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `lalr1` and `ll1`
[INFO] [stdout]   --> src/bin/parser.rs:11:26
[INFO] [stdout]    |
[INFO] [stdout] 11 | use grammar::{lr0, slr1, ll1, lr1, lalr1};
[INFO] [stdout]    |                          ^^^       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `grammar::parse_tree::ParseTree`
[INFO] [stdout]   --> src/bin/parser.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use grammar::parse_tree::ParseTree;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `grammar::first_follow_set::FirstFollowSet`
[INFO] [stdout]  --> src/bin/parser.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use grammar::first_follow_set::FirstFollowSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `grammar::lr0::lr0_item_set_family::LR0ItemSetFamily`
[INFO] [stdout]  --> src/bin/parser.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use grammar::lr0::lr0_item_set_family::LR0ItemSetFamily;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `grammar::lr1::lr1_item_set_family::LR1ItemSetFamily`
[INFO] [stdout]  --> src/bin/parser.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use grammar::lr1::lr1_item_set_family::LR1ItemSetFamily;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `lalr1` and `ll1`
[INFO] [stdout]   --> src/bin/parser.rs:11:26
[INFO] [stdout]    |
[INFO] [stdout] 11 | use grammar::{lr0, slr1, ll1, lr1, lalr1};
[INFO] [stdout]    |                          ^^^       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `grammar::parse_tree::ParseTree`
[INFO] [stdout]   --> src/bin/parser.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use grammar::parse_tree::ParseTree;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/parser.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |             let mut grammar = Grammar::from_advanced_file(&f).unwrap();
[INFO] [stdout]     |                 ----^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/parser.rs:173:17
[INFO] [stdout]     |
[INFO] [stdout] 173 |             let mut grammar = Grammar::from_advanced_file(&f).unwrap();
[INFO] [stdout]     |                 ----^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/bin/parser.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |         file.write_all(serialized.as_bytes());
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let _ = file.write_all(serialized.as_bytes());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/bin/parser.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 |         outf.write_all(json.as_bytes());
[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] 193 |         let _ = outf.write_all(json.as_bytes());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::prelude`
[INFO] [stdout]   --> src/bin/exam.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | use std::io::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::prelude`
[INFO] [stdout]   --> src/bin/exam.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | use std::io::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/bin/parser.rs:120:9
[INFO] [stdout]     |
[INFO] [stdout] 120 |         file.write_all(serialized.as_bytes());
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let _ = file.write_all(serialized.as_bytes());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/bin/parser.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 |         outf.write_all(json.as_bytes());
[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] 193 |         let _ = outf.write_all(json.as_bytes());
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parse_tree`
[INFO] [stdout]    --> src/bin/exam.rs:360:14
[INFO] [stdout]     |
[INFO] [stdout] 360 |         let (parse_tree, table) = ll_table.analysis_with_process(&token_stream, g.origin.clone());
[INFO] [stdout]     |              ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_parse_tree`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `parse_tree`
[INFO] [stdout]    --> src/bin/exam.rs:360:14
[INFO] [stdout]     |
[INFO] [stdout] 360 |         let (parse_tree, table) = ll_table.analysis_with_process(&token_stream, g.origin.clone());
[INFO] [stdout]     |              ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_parse_tree`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/exam.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     io::stdin().read_line(&mut input);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let _ = io::stdin().read_line(&mut input);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/exam.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     io::stdin().read_line(&mut input);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 35 |     let _ = io::stdin().read_line(&mut input);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.89s
[INFO] running `Command { std: "docker" "inspect" "86be78d12d32e2462eec3643cd8cc58e45b9bb8a31e45bab5e5f3ec19f5e65d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86be78d12d32e2462eec3643cd8cc58e45b9bb8a31e45bab5e5f3ec19f5e65d0", kill_on_drop: false }`
[INFO] [stdout] 86be78d12d32e2462eec3643cd8cc58e45b9bb8a31e45bab5e5f3ec19f5e65d0
[INFO] checking wormtql/rusty-parser against try#f9935d29d867449445ee008640ccca1bf1ae0889+rustflags=-Dtail_expr_drop_order for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwormtql%2Frusty-parser" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wormtql/rusty-parser on toolchain f9935d29d867449445ee008640ccca1bf1ae0889
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wormtql/rusty-parser
[INFO] finished tweaking git repo https://github.com/wormtql/rusty-parser
[INFO] tweaked toml for git repo https://github.com/wormtql/rusty-parser written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/wormtql/rusty-parser 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" "+f9935d29d867449445ee008640ccca1bf1ae0889" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 28ab5ec20fcfb994d5501ce347740567abb51c51f58e097e61939dc0daacf6c2
[INFO] running `Command { std: "docker" "start" "-a" "28ab5ec20fcfb994d5501ce347740567abb51c51f58e097e61939dc0daacf6c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28ab5ec20fcfb994d5501ce347740567abb51c51f58e097e61939dc0daacf6c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28ab5ec20fcfb994d5501ce347740567abb51c51f58e097e61939dc0daacf6c2", kill_on_drop: false }`
[INFO] [stdout] 28ab5ec20fcfb994d5501ce347740567abb51c51f58e097e61939dc0daacf6c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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 -Dtail_expr_drop_order" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be5a8ff3f246fd1184b53c375e6c1a04b90acc2f1c6421a651ae45bf6c03e856
[INFO] running `Command { std: "docker" "start" "-a" "be5a8ff3f246fd1184b53c375e6c1a04b90acc2f1c6421a651ae45bf6c03e856", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking encode_unicode v0.3.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]     Checking bstr v0.2.12
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]     Checking grammar v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> src/ll_table/mod.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                                 ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `NonLeafNode`
[INFO] [stdout]  --> src/ll_table/mod.rs:4:36
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::parse_tree::{ParseTree, NonLeafNode};
[INFO] [stdout]   |                                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> src/lr_table/mod.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                                 ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> src/lr_table/lalr_table.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                                 ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/lr0/lr0_item_set_family.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::thread_rng`
[INFO] [stdout]  --> src/lr0/lr0_item_set_family.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use rand::thread_rng;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `VecDeque`
[INFO] [stdout]  --> src/lr1/lr1_item_set_family.rs:7:33
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::collections::{HashMap, VecDeque};
[INFO] [stdout]   |                                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::thread_rng`
[INFO] [stdout]   --> src/lr1/lr1_item_set_family.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use rand::thread_rng;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::lr1_item_set::LR1ItemSet`
[INFO] [stdout]  --> src/lr1/mod.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use self::lr1_item_set::LR1ItemSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::grammar::letter::Letter`
[INFO] [stdout]  --> src/parse_tree/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::grammar::letter::Letter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ActionTableItem` and `LRTable`
[INFO] [stdout]  --> src/parse_tree/mod.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::lr_table::{LRTable, ActionTableItem};
[INFO] [stdout]   |                       ^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TokenStream`
[INFO] [stdout]  --> src/parse_tree/mod.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::utils`
[INFO] [stdout]  --> src/automaton/dfa.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::utils;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/automaton/dfa.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |         'bigloop: loop {
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_labels)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/automaton/dfa.rs:130:13
[INFO] [stdout]     |
[INFO] [stdout] 130 |             'everysplit: for p in split.iter() {
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/automaton/dfa.rs:131:17
[INFO] [stdout]     |
[INFO] [stdout] 131 |                 'everyletter: for letter in self.letters.iter() {
[INFO] [stdout]     |                 ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::utils`
[INFO] [stdout]  --> src/optimization/du.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::utils;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> src/ll_table/mod.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                                 ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `NonLeafNode`
[INFO] [stdout]  --> src/ll_table/mod.rs:4:36
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::parse_tree::{ParseTree, NonLeafNode};
[INFO] [stdout]   |                                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> src/lr_table/mod.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                                 ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Token`
[INFO] [stdout]  --> src/lr_table/lalr_table.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                                 ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::VecDeque`
[INFO] [stdout]  --> src/lr0/lr0_item_set_family.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::collections::VecDeque;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::thread_rng`
[INFO] [stdout]  --> src/lr0/lr0_item_set_family.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use rand::thread_rng;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `VecDeque`
[INFO] [stdout]  --> src/lr1/lr1_item_set_family.rs:7:33
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::collections::{HashMap, VecDeque};
[INFO] [stdout]   |                                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand::thread_rng`
[INFO] [stdout]   --> src/lr1/lr1_item_set_family.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use rand::thread_rng;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::lr1_item_set::LR1ItemSet`
[INFO] [stdout]  --> src/lr1/mod.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use self::lr1_item_set::LR1ItemSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::grammar::letter::Letter`
[INFO] [stdout]  --> src/parse_tree/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::grammar::letter::Letter;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ActionTableItem` and `LRTable`
[INFO] [stdout]  --> src/parse_tree/mod.rs:5:23
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::lr_table::{LRTable, ActionTableItem};
[INFO] [stdout]   |                       ^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TokenStream`
[INFO] [stdout]  --> src/parse_tree/mod.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 | use crate::token::{TokenStream, Token};
[INFO] [stdout]   |                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::utils`
[INFO] [stdout]  --> src/automaton/dfa.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::utils;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/automaton/dfa.rs:124:9
[INFO] [stdout]     |
[INFO] [stdout] 124 |         'bigloop: loop {
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_labels)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/automaton/dfa.rs:130:13
[INFO] [stdout]     |
[INFO] [stdout] 130 |             'everysplit: for p in split.iter() {
[INFO] [stdout]     |             ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]    --> src/automaton/dfa.rs:131:17
[INFO] [stdout]     |
[INFO] [stdout] 131 |                 'everyletter: for letter in self.letters.iter() {
[INFO] [stdout]     |                 ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::utils`
[INFO] [stdout]  --> src/optimization/du.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::utils;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/grammar/letter.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let mut temp = match self {
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/grammar/letter.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let mut temp = match self {
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tree_stack`
[INFO] [stdout]   --> src/ll_table/mod.rs:80:17
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let mut tree_stack: Vec<ParseTree> = Vec::new();
[INFO] [stdout]    |                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_tree_stack`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ll_table/mod.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let mut tree_stack: Vec<ParseTree> = Vec::new();
[INFO] [stdout]    |             ----^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lr_table/lalr_table.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let mut letter_stream: Vec<Letter> = token_stream.stream.iter().map(
[INFO] [stdout]    |             ----^^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tree_stack`
[INFO] [stdout]   --> src/ll_table/mod.rs:80:17
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let mut tree_stack: Vec<ParseTree> = Vec::new();
[INFO] [stdout]    |                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_tree_stack`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr_table/mod.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut letter_stream: Vec<Letter> = token_stream.stream.iter().map(
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ll_table/mod.rs:80:13
[INFO] [stdout]    |
[INFO] [stdout] 80 |         let mut tree_stack: Vec<ParseTree> = Vec::new();
[INFO] [stdout]    |             ----^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr_table/mod.rs:292:13
[INFO] [stdout]     |
[INFO] [stdout] 292 |         let mut letter_stream: Vec<Letter> = token_stream.stream.iter().map(
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lr_table/lalr_table.rs:95:13
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let mut letter_stream: Vec<Letter> = token_stream.stream.iter().map(
[INFO] [stdout]    |             ----^^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr0/lr0_item_set_family.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 |             let mut shuffle = &mut signs[..];
[INFO] [stdout]     |                 ----^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr_table/mod.rs:172:13
[INFO] [stdout]     |
[INFO] [stdout] 172 |         let mut letter_stream: Vec<Letter> = token_stream.stream.iter().map(
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr_table/mod.rs:292:13
[INFO] [stdout]     |
[INFO] [stdout] 292 |         let mut letter_stream: Vec<Letter> = token_stream.stream.iter().map(
[INFO] [stdout]     |             ----^^^^^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr1/lr1_item_set_family.rs:109:17
[INFO] [stdout]     |
[INFO] [stdout] 109 |             let mut shuffle = &mut signs[..];
[INFO] [stdout]     |                 ----^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lr1/mod.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 |     for (i, item_set) in data.item_sets.iter().enumerate() {
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr0/lr0_item_set_family.rs:115:17
[INFO] [stdout]     |
[INFO] [stdout] 115 |             let mut shuffle = &mut signs[..];
[INFO] [stdout]     |                 ----^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lr1/lr1_item_set_family.rs:109:17
[INFO] [stdout]     |
[INFO] [stdout] 109 |             let mut shuffle = &mut signs[..];
[INFO] [stdout]     |                 ----^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lr1/mod.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 17 |     for (i, item_set) in data.item_sets.iter().enumerate() {
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/optimization/dominant.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     for i in 0..lines.len() {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `uses`
[INFO] [stdout]   --> src/optimization/ud.rs:56:27
[INFO] [stdout]    |
[INFO] [stdout] 56 |         for (point, left, uses) in block.iter() {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_uses`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/ll_table/mod.rs:142:10
[INFO] [stdout]     |
[INFO] [stdout] 75  |         let mut table = Table::new();
[INFO] [stdout]     |                 ----- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 80  |         let mut tree_stack: Vec<ParseTree> = Vec::new();
[INFO] [stdout]     |                 ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 142 |         (None, table)
[INFO] [stdout]     |          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]     = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/lr_table/mod.rs:19:28
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[derive(Debug, Serialize, Deserialize)]
[INFO] [stdout]    |                            ^^^^^^^^^^^ these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]    = note: this error originates in the macro `try` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/lr_table/mod.rs:34:28
[INFO] [stdout]    |
[INFO] [stdout] 34 | #[derive(Debug, Serialize, Deserialize)]
[INFO] [stdout]    |                            ^^^^^^^^^^^ these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]    = note: this error originates in the macro `try` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/lr_table/mod.rs:280:10
[INFO] [stdout]     |
[INFO] [stdout] 169 |         let mut tree: Vec<ParseTree> = Vec::new();
[INFO] [stdout]     |                 ---- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 178 |         let mut table = Table::new();
[INFO] [stdout]     |                 ----- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 280 |         (Some(tree.pop().unwrap()), table)
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/lr_table/mod.rs:380:14
[INFO] [stdout]     |
[INFO] [stdout] 289 |         let mut tree: Vec<ParseTree> = Vec::new();
[INFO] [stdout]     |                 ---- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 380 |         Some(tree.pop().unwrap())
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/lr_table/lalr_table.rs:202:10
[INFO] [stdout]     |
[INFO] [stdout] 92  |         let mut tree: Vec<ParseTree> = Vec::new();
[INFO] [stdout]     |                 ---- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 101 |         let mut table = Table::new();
[INFO] [stdout]     |                 ----- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 202 |         (Some(tree.pop().unwrap()), table)
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/optimization/dominant.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     for i in 0..lines.len() {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `uses`
[INFO] [stdout]   --> src/optimization/ud.rs:56:27
[INFO] [stdout]    |
[INFO] [stdout] 56 |         for (point, left, uses) in block.iter() {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_uses`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/parse_tree/mod.rs:75:17
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 state.serialize_field("children", &n.children);
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 let _ = state.serialize_field("children", &n.children);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors; 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/ll_table/mod.rs:142:10
[INFO] [stdout]     |
[INFO] [stdout] 75  |         let mut table = Table::new();
[INFO] [stdout]     |                 ----- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 80  |         let mut tree_stack: Vec<ParseTree> = Vec::new();
[INFO] [stdout]     |                 ---------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 142 |         (None, table)
[INFO] [stdout]     |          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]     = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/lr_table/mod.rs:19:28
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[derive(Debug, Serialize, Deserialize)]
[INFO] [stdout]    |                            ^^^^^^^^^^^ these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]    = note: this error originates in the macro `try` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> src/lr_table/mod.rs:34:28
[INFO] [stdout]    |
[INFO] [stdout] 34 | #[derive(Debug, Serialize, Deserialize)]
[INFO] [stdout]    |                            ^^^^^^^^^^^ these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]    = note: this error originates in the macro `try` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/lr_table/mod.rs:280:10
[INFO] [stdout]     |
[INFO] [stdout] 169 |         let mut tree: Vec<ParseTree> = Vec::new();
[INFO] [stdout]     |                 ---- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 178 |         let mut table = Table::new();
[INFO] [stdout]     |                 ----- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 280 |         (Some(tree.pop().unwrap()), table)
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/lr_table/mod.rs:380:14
[INFO] [stdout]     |
[INFO] [stdout] 289 |         let mut tree: Vec<ParseTree> = Vec::new();
[INFO] [stdout]     |                 ---- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 380 |         Some(tree.pop().unwrap())
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]    --> src/lr_table/lalr_table.rs:202:10
[INFO] [stdout]     |
[INFO] [stdout] 92  |         let mut tree: Vec<ParseTree> = Vec::new();
[INFO] [stdout]     |                 ---- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 101 |         let mut table = Table::new();
[INFO] [stdout]     |                 ----- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 202 |         (Some(tree.pop().unwrap()), table)
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this changes meaning in Rust 2024
[INFO] [stdout]     = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/parse_tree/mod.rs:75:17
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 state.serialize_field("children", &n.children);
[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)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 75 |                 let _ = state.serialize_field("children", &n.children);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `grammar` (lib) due to 7 previous errors; 29 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 6 previous errors; 29 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `grammar` (lib test) due to 7 previous errors; 29 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "be5a8ff3f246fd1184b53c375e6c1a04b90acc2f1c6421a651ae45bf6c03e856", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be5a8ff3f246fd1184b53c375e6c1a04b90acc2f1c6421a651ae45bf6c03e856", kill_on_drop: false }`
[INFO] [stdout] be5a8ff3f246fd1184b53c375e6c1a04b90acc2f1c6421a651ae45bf6c03e856