[INFO] cloning repository https://github.com/TheRobotFox/lexer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/TheRobotFox/lexer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheRobotFox%2Flexer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheRobotFox%2Flexer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6cae657c9a662c0251485f3163ccfbc3ff418f3a
[INFO] checking TheRobotFox/lexer against master#4eb62535fc12dd1a63fd43a4173e224e79313c4d for pr-158816
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheRobotFox%2Flexer" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/TheRobotFox/lexer
[INFO] finished tweaking git repo https://github.com/TheRobotFox/lexer
[INFO] tweaked toml for git repo https://github.com/TheRobotFox/lexer written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/TheRobotFox/lexer on toolchain 4eb62535fc12dd1a63fd43a4173e224e79313c4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/TheRobotFox/lexer 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" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3d5ced03c013a94a2f102a4510f48a6e9184255caf5fd8244f58017bde7f5210" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] df185631cfdbc9e32b273f3179a52ea576acc1adf3da9c464285824e4449ada6
[INFO] running `Command { std: "docker" "start" "df185631cfdbc9e32b273f3179a52ea576acc1adf3da9c464285824e4449ada6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df185631cfdbc9e32b273f3179a52ea576acc1adf3da9c464285824e4449ada6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "df185631cfdbc9e32b273f3179a52ea576acc1adf3da9c464285824e4449ada6" "/opt/rustwide/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df185631cfdbc9e32b273f3179a52ea576acc1adf3da9c464285824e4449ada6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "df185631cfdbc9e32b273f3179a52ea576acc1adf3da9c464285824e4449ada6" "/opt/rustwide/cargo-home/bin/cargo" "+4eb62535fc12dd1a63fd43a4173e224e79313c4d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling glob v0.3.2
[INFO] [stderr]    Compiling prettyplease v0.2.29
[INFO] [stderr]    Compiling libc v0.2.170
[INFO] [stderr]    Compiling regex-syntax v0.8.5
[INFO] [stderr]    Compiling bindgen v0.69.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.93
[INFO] [stderr]    Compiling libloading v0.8.6
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling cc v1.2.15
[INFO] [stderr]    Compiling itertools v0.12.1
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]     Checking smallvec v1.14.0
[INFO] [stderr]    Compiling which v4.4.2
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking shrev v1.1.3
[INFO] [stderr]     Checking hibitset v0.6.4
[INFO] [stderr]     Checking log v0.4.26
[INFO] [stderr]    Compiling clang-sys v1.8.1
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking parking_lot_core v0.9.10
[INFO] [stderr]     Checking parking_lot v0.12.3
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.98
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]     Checking tynm v0.1.10
[INFO] [stderr]    Compiling cmake v0.1.54
[INFO] [stderr]     Checking shred v0.10.2
[INFO] [stderr]     Checking specs v0.16.1
[INFO] [stderr]    Compiling cexpr v0.6.0
[INFO] [stderr]    Compiling regex v1.11.1
[INFO] [stderr]    Compiling specs-derive v0.4.1
[INFO] [stderr]    Compiling logos-codegen v0.13.0
[INFO] [stderr]    Compiling logos-derive v0.13.0
[INFO] [stderr]     Checking logos v0.13.0
[INFO] [stderr]    Compiling raylib-sys v5.0.2
[INFO] [stderr]     Checking raylib v5.0.2
[INFO] [stderr]     Checking lexer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/parse.rs:340:23
[INFO] [stdout]     |
[INFO] [stdout] 340 |                     if(c=='\n'){
[INFO] [stdout]     |                       ^       ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 340 -                     if(c=='\n'){
[INFO] [stdout] 340 +                     if c=='\n' {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/parse.rs:340:23
[INFO] [stdout]     |
[INFO] [stdout] 340 |                     if(c=='\n'){
[INFO] [stdout]     |                       ^       ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 340 -                     if(c=='\n'){
[INFO] [stdout] 340 +                     if c=='\n' {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parse.rs:167:16
[INFO] [stdout]     |
[INFO] [stdout] 167 |     fn reduction0(mut s: &str) -> char {s.chars().nth(1).unwrap()} 
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/parse.rs:168:16
[INFO] [stdout]     |
[INFO] [stdout] 168 |     fn reduction1(mut s: &str) -> char {s.chars().next().unwrap()} 
[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/parse.rs:169:16
[INFO] [stdout]     |
[INFO] [stdout] 169 |     fn reduction2(mut s: BTreeSet<char>) -> BTreeSet<char> {s} 
[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/parse.rs:170:16
[INFO] [stdout]     |
[INFO] [stdout] 170 |     fn reduction3(mut c: char) -> BTreeSet<char> {BTreeSet::from([c])} 
[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/parse.rs:171:16
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn reduction4(mut a: char, mut b: char) -> BTreeSet<char> {(a..=b).collect()} 
[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/parse.rs:171:29
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn reduction4(mut a: char, mut b: char) -> BTreeSet<char> {(a..=b).collect()} 
[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/parse.rs:172:16
[INFO] [stdout]     |
[INFO] [stdout] 172 |     fn reduction5(mut s: BTreeSet<char>) -> Pattern {Pattern::Terminal(Term{chars: s, negate: true})                   } 
[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/parse.rs:173:16
[INFO] [stdout]     |
[INFO] [stdout] 173 |     fn reduction6(mut stack: BTreeSet<char>, mut s: BTreeSet<char>) -> BTreeSet<char> {stack.union(&s); stack} 
[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/parse.rs:173:43
[INFO] [stdout]     |
[INFO] [stdout] 173 |     fn reduction6(mut stack: BTreeSet<char>, mut s: BTreeSet<char>) -> BTreeSet<char> {stack.union(&s); stack} 
[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/parse.rs:174:16
[INFO] [stdout]     |
[INFO] [stdout] 174 |     fn reduction7(mut s: BTreeSet<char>) -> Pattern {Pattern::Terminal(Term{chars: s, negate: false})                  } 
[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/parse.rs:175:16
[INFO] [stdout]     |
[INFO] [stdout] 175 |     fn reduction8(mut e: Regexpr) -> Vec<Regexpr> {vec![e]} 
[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/parse.rs:176:16
[INFO] [stdout]     |
[INFO] [stdout] 176 |     fn reduction9(mut t: Pattern) -> Regexpr {Regexpr{pattern: t, looping: true, transparent: false}} 
[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/parse.rs:177:17
[INFO] [stdout]     |
[INFO] [stdout] 177 |     fn reduction10(mut t: Pattern) -> Regexpr {Regexpr{pattern: t, looping: false, transparent: true}} 
[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/parse.rs:178:17
[INFO] [stdout]     |
[INFO] [stdout] 178 |     fn reduction11(mut t: Pattern) -> Regexpr {Regexpr{pattern: t, looping: true, transparent: true}} 
[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/parse.rs:179:17
[INFO] [stdout]     |
[INFO] [stdout] 179 |     fn reduction12(mut t: Pattern) -> Regexpr {Regexpr{pattern: t, looping: false, transparent: false}} 
[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/parse.rs:180:17
[INFO] [stdout]     |
[INFO] [stdout] 180 |     fn reduction13(mut p: Pattern) -> Pattern {p                                                                 } 
[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/parse.rs:181:17
[INFO] [stdout]     |
[INFO] [stdout] 181 |     fn reduction14(mut s: char) -> Pattern {Pattern::Terminal(Term{chars: BTreeSet::from([s]), negate: false})} 
[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/parse.rs:182:17
[INFO] [stdout]     |
[INFO] [stdout] 182 |     fn reduction15(mut a: Pattern, mut b: Vec<Regexpr>) -> Pattern {Pattern::Or(Box::new(a),Box::new(Pattern::Group(b))) } 
[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/parse.rs:182:33
[INFO] [stdout]     |
[INFO] [stdout] 182 |     fn reduction15(mut a: Pattern, mut b: Vec<Regexpr>) -> Pattern {Pattern::Or(Box::new(a),Box::new(Pattern::Group(b))) } 
[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/parse.rs:183:42
[INFO] [stdout]     |
[INFO] [stdout] 183 |     fn reduction16(mut stack: Vec<Regexpr>, mut e: Regexpr) -> Vec<Regexpr> {stack.push(e); stack} 
[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/parse.rs:184:17
[INFO] [stdout]     |
[INFO] [stdout] 184 |     fn reduction17(mut t: Vec<Regexpr>) -> Pattern {Pattern::Group(t)                                    } 
[INFO] [stdout]     |                    ----^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `EOF` is never constructed
[INFO] [stdout]  --> src/parse.rs:8:2
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[logos(skip " ")]pub enum Token {
[INFO] [stdout]   |                            ----- variant in this enum
[INFO] [stdout] 8 |     EOF,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DFAState` is never constructed
[INFO] [stdout]    --> src/automaton.rs:219:12
[INFO] [stdout]     |
[INFO] [stdout] 219 | pub struct DFAState {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DFA` is never constructed
[INFO] [stdout]    --> src/automaton.rs:224:12
[INFO] [stdout]     |
[INFO] [stdout] 224 | pub struct DFA {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::collections::btree_set::Union` that must be used
[INFO] [stdout]    --> src/parse.rs:173:85
[INFO] [stdout]     |
[INFO] [stdout] 173 |     fn reduction6(mut stack: BTreeSet<char>, mut s: BTreeSet<char>) -> BTreeSet<char> {stack.union(&s); stack} 
[INFO] [stdout]     |                                                                                        ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this returns the union as an iterator, without modifying either input set
[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] 173 |     fn reduction6(mut stack: BTreeSet<char>, mut s: BTreeSet<char>) -> BTreeSet<char> {let _ = stack.union(&s); stack} 
[INFO] [stdout]     |                                                                                        +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/parse.rs:167:16
[INFO] [stdout]     |
[INFO] [stdout] 167 |     fn reduction0(mut s: &str) -> char {s.chars().nth(1).unwrap()} 
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/parse.rs:168:16
[INFO] [stdout]     |
[INFO] [stdout] 168 |     fn reduction1(mut s: &str) -> char {s.chars().next().unwrap()} 
[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/parse.rs:169:16
[INFO] [stdout]     |
[INFO] [stdout] 169 |     fn reduction2(mut s: BTreeSet<char>) -> BTreeSet<char> {s} 
[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/parse.rs:170:16
[INFO] [stdout]     |
[INFO] [stdout] 170 |     fn reduction3(mut c: char) -> BTreeSet<char> {BTreeSet::from([c])} 
[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/parse.rs:171:16
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn reduction4(mut a: char, mut b: char) -> BTreeSet<char> {(a..=b).collect()} 
[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/parse.rs:171:29
[INFO] [stdout]     |
[INFO] [stdout] 171 |     fn reduction4(mut a: char, mut b: char) -> BTreeSet<char> {(a..=b).collect()} 
[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/parse.rs:172:16
[INFO] [stdout]     |
[INFO] [stdout] 172 |     fn reduction5(mut s: BTreeSet<char>) -> Pattern {Pattern::Terminal(Term{chars: s, negate: true})                   } 
[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/parse.rs:173:16
[INFO] [stdout]     |
[INFO] [stdout] 173 |     fn reduction6(mut stack: BTreeSet<char>, mut s: BTreeSet<char>) -> BTreeSet<char> {stack.union(&s); stack} 
[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/parse.rs:173:43
[INFO] [stdout]     |
[INFO] [stdout] 173 |     fn reduction6(mut stack: BTreeSet<char>, mut s: BTreeSet<char>) -> BTreeSet<char> {stack.union(&s); stack} 
[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/parse.rs:174:16
[INFO] [stdout]     |
[INFO] [stdout] 174 |     fn reduction7(mut s: BTreeSet<char>) -> Pattern {Pattern::Terminal(Term{chars: s, negate: false})                  } 
[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/parse.rs:175:16
[INFO] [stdout]     |
[INFO] [stdout] 175 |     fn reduction8(mut e: Regexpr) -> Vec<Regexpr> {vec![e]} 
[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/parse.rs:176:16
[INFO] [stdout]     |
[INFO] [stdout] 176 |     fn reduction9(mut t: Pattern) -> Regexpr {Regexpr{pattern: t, looping: true, transparent: false}} 
[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/parse.rs:177:17
[INFO] [stdout]     |
[INFO] [stdout] 177 |     fn reduction10(mut t: Pattern) -> Regexpr {Regexpr{pattern: t, looping: false, transparent: true}} 
[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/parse.rs:178:17
[INFO] [stdout]     |
[INFO] [stdout] 178 |     fn reduction11(mut t: Pattern) -> Regexpr {Regexpr{pattern: t, looping: true, transparent: true}} 
[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/parse.rs:179:17
[INFO] [stdout]     |
[INFO] [stdout] 179 |     fn reduction12(mut t: Pattern) -> Regexpr {Regexpr{pattern: t, looping: false, transparent: false}} 
[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/parse.rs:180:17
[INFO] [stdout]     |
[INFO] [stdout] 180 |     fn reduction13(mut p: Pattern) -> Pattern {p                                                                 } 
[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/parse.rs:181:17
[INFO] [stdout]     |
[INFO] [stdout] 181 |     fn reduction14(mut s: char) -> Pattern {Pattern::Terminal(Term{chars: BTreeSet::from([s]), negate: false})} 
[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/parse.rs:182:17
[INFO] [stdout]     |
[INFO] [stdout] 182 |     fn reduction15(mut a: Pattern, mut b: Vec<Regexpr>) -> Pattern {Pattern::Or(Box::new(a),Box::new(Pattern::Group(b))) } 
[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/parse.rs:182:33
[INFO] [stdout]     |
[INFO] [stdout] 182 |     fn reduction15(mut a: Pattern, mut b: Vec<Regexpr>) -> Pattern {Pattern::Or(Box::new(a),Box::new(Pattern::Group(b))) } 
[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/parse.rs:183:42
[INFO] [stdout]     |
[INFO] [stdout] 183 |     fn reduction16(mut stack: Vec<Regexpr>, mut e: Regexpr) -> Vec<Regexpr> {stack.push(e); stack} 
[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/parse.rs:184:17
[INFO] [stdout]     |
[INFO] [stdout] 184 |     fn reduction17(mut t: Vec<Regexpr>) -> Pattern {Pattern::Group(t)                                    } 
[INFO] [stdout]     |                    ----^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `EOF` is never constructed
[INFO] [stdout]  --> src/parse.rs:8:2
[INFO] [stdout]   |
[INFO] [stdout] 7 | #[logos(skip " ")]pub enum Token {
[INFO] [stdout]   |                            ----- variant in this enum
[INFO] [stdout] 8 |     EOF,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DFAState` is never constructed
[INFO] [stdout]    --> src/automaton.rs:219:12
[INFO] [stdout]     |
[INFO] [stdout] 219 | pub struct DFAState {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DFA` is never constructed
[INFO] [stdout]    --> src/automaton.rs:224:12
[INFO] [stdout]     |
[INFO] [stdout] 224 | pub struct DFA {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::collections::btree_set::Union` that must be used
[INFO] [stdout]    --> src/parse.rs:173:85
[INFO] [stdout]     |
[INFO] [stdout] 173 |     fn reduction6(mut stack: BTreeSet<char>, mut s: BTreeSet<char>) -> BTreeSet<char> {stack.union(&s); stack} 
[INFO] [stdout]     |                                                                                        ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this returns the union as an iterator, without modifying either input set
[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] 173 |     fn reduction6(mut stack: BTreeSet<char>, mut s: BTreeSet<char>) -> BTreeSet<char> {let _ = stack.union(&s); stack} 
[INFO] [stdout]     |                                                                                        +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 37.42s
[INFO] running `Command { std: "docker" "inspect" "df185631cfdbc9e32b273f3179a52ea576acc1adf3da9c464285824e4449ada6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df185631cfdbc9e32b273f3179a52ea576acc1adf3da9c464285824e4449ada6", kill_on_drop: false }`
[INFO] [stdout] df185631cfdbc9e32b273f3179a52ea576acc1adf3da9c464285824e4449ada6
