[INFO] fetching crate parsegen 0.1.1...
[INFO] checking parsegen-0.1.1 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] extracting crate parsegen 0.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate parsegen 0.1.1
[INFO] finished tweaking crates.io crate parsegen 0.1.1
[INFO] tweaked toml for crates.io crate parsegen 0.1.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate parsegen 0.1.1 on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] [stderr]       Adding lexgen v0.2.2 (available: v0.16.0)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.106)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `proc_macro` is deprecated in favor of `proc-macro` and will not work in the 2024 edition
[INFO] [stderr] (in the `parsegen` library target)
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lexgen v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca74612f9b0ec81b307177ac376746b34605e8121dc96fc7f86b5f40828473c0
[INFO] running `Command { std: "docker" "start" "-a" "ca74612f9b0ec81b307177ac376746b34605e8121dc96fc7f86b5f40828473c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca74612f9b0ec81b307177ac376746b34605e8121dc96fc7f86b5f40828473c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca74612f9b0ec81b307177ac376746b34605e8121dc96fc7f86b5f40828473c0", kill_on_drop: false }`
[INFO] [stdout] ca74612f9b0ec81b307177ac376746b34605e8121dc96fc7f86b5f40828473c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1ff60a578f258af37bc8a45a90523f26360a5e1536cb022d82fae98ae44f1665
[INFO] running `Command { std: "docker" "start" "-a" "1ff60a578f258af37bc8a45a90523f26360a5e1536cb022d82fae98ae44f1665", kill_on_drop: false }`
[INFO] [stderr] warning: `proc_macro` is deprecated in favor of `proc-macro` and will not work in the 2024 edition
[INFO] [stderr] (in the `parsegen` library target)
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking parsegen v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |     TypeSynonym(TypeSynonym),
[INFO] [stdout]    |     ----------- ^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `GrammarItem` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 15 -     TypeSynonym(TypeSynonym),
[INFO] [stdout] 15 +     TypeSynonym(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `ty` are never read
[INFO] [stdout]   --> src/ast.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub struct TypeSynonym {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 41 |     pub name: syn::Ident,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 42 |     pub ty: syn::Type,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TypeSynonym` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:108:12
[INFO] [stdout]     |
[INFO] [stdout] 108 |     Repeat(Box<Repeat>),
[INFO] [stdout]     |     ------ ^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Symbol` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 108 -     Repeat(Box<Repeat>),
[INFO] [stdout] 108 +     Repeat(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `op` and `symbol` are never read
[INFO] [stdout]    --> src/ast.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 122 | pub struct Repeat {
[INFO] [stdout]     |            ------ fields in this struct
[INFO] [stdout] 123 |     pub op: RepeatOp,
[INFO] [stdout]     |         ^^
[INFO] [stdout] 124 |     pub symbol: Symbol,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Repeat` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:137:14
[INFO] [stdout]     |
[INFO] [stdout] 137 |     Fallible(syn::Expr),
[INFO] [stdout]     |     -------- ^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Action` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 137 -     Fallible(syn::Expr),
[INFO] [stdout] 137 +     Fallible(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FirstSetDisplay` is never constructed
[INFO] [stdout]    --> src/first.rs:116:12
[INFO] [stdout]     |
[INFO] [stdout] 116 | pub struct FirstSetDisplay<'a, 'b, A> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_production` is never used
[INFO] [stdout]    --> src/grammar.rs:186:12
[INFO] [stdout]     |
[INFO] [stdout] 174 | impl<A> NonTerminal<A> {
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 186 |     pub fn get_production(&self, production_idx: ProductionIdx) -> &Production<A> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ProductionIndicesIter` is never constructed
[INFO] [stdout]    --> src/grammar.rs:197:8
[INFO] [stdout]     |
[INFO] [stdout] 197 | struct ProductionIndicesIter<'grammar, A> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SymbolKindDisplay` is never constructed
[INFO] [stdout]    --> src/grammar.rs:301:12
[INFO] [stdout]     |
[INFO] [stdout] 301 | pub struct SymbolKindDisplay<'a, 'b, A> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/grammar.rs:307:12
[INFO] [stdout]     |
[INFO] [stdout] 306 | impl<'a, 'b, A> SymbolKindDisplay<'a, 'b, A> {
[INFO] [stdout]     | -------------------------------------------- associated function in this implementation
[INFO] [stdout] 307 |     pub fn new(symbol: &'a SymbolKind, grammar: &'b Grammar<A>) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/grammar.rs:318:12
[INFO] [stdout]     |
[INFO] [stdout] 317 | impl<'a, 'b, A> ProductionDisplay<'a, 'b, A> {
[INFO] [stdout]     | -------------------------------------------- associated function in this implementation
[INFO] [stdout] 318 |     pub fn new(production: &'a Production<A>, grammar: &'b Grammar<A>) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LR1AutomatonDisplay` is never constructed
[INFO] [stdout]    --> src/lr1.rs:421:12
[INFO] [stdout]     |
[INFO] [stdout] 421 | pub struct LR1AutomatonDisplay<'a, 'b, A> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LR1StateDisplay` is never constructed
[INFO] [stdout]    --> src/lr1.rs:426:8
[INFO] [stdout]     |
[INFO] [stdout] 426 | struct LR1StateDisplay<'a, 'b, A> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LR1ItemDisplay` is never constructed
[INFO] [stdout]    --> src/lr1.rs:431:8
[INFO] [stdout]     |
[INFO] [stdout] 431 | struct LR1ItemDisplay<'a, 'b, A> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LRTableDisplay` is never constructed
[INFO] [stdout]    --> src/lr_common.rs:262:12
[INFO] [stdout]     |
[INFO] [stdout] 262 | pub struct LRTableDisplay<'a, 'b, A> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LRActionDisplay` is never constructed
[INFO] [stdout]    --> src/lr_common.rs:274:12
[INFO] [stdout]     |
[INFO] [stdout] 274 | pub struct LRActionDisplay<'a, 'b, A> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling lexgen v0.2.2
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |     TypeSynonym(TypeSynonym),
[INFO] [stdout]    |     ----------- ^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `GrammarItem` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 15 -     TypeSynonym(TypeSynonym),
[INFO] [stdout] 15 +     TypeSynonym(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `ty` are never read
[INFO] [stdout]   --> src/ast.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub struct TypeSynonym {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 41 |     pub name: syn::Ident,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 42 |     pub ty: syn::Type,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TypeSynonym` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:108:12
[INFO] [stdout]     |
[INFO] [stdout] 108 |     Repeat(Box<Repeat>),
[INFO] [stdout]     |     ------ ^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Symbol` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 108 -     Repeat(Box<Repeat>),
[INFO] [stdout] 108 +     Repeat(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `op` and `symbol` are never read
[INFO] [stdout]    --> src/ast.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 122 | pub struct Repeat {
[INFO] [stdout]     |            ------ fields in this struct
[INFO] [stdout] 123 |     pub op: RepeatOp,
[INFO] [stdout]     |         ^^
[INFO] [stdout] 124 |     pub symbol: Symbol,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Repeat` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:137:14
[INFO] [stdout]     |
[INFO] [stdout] 137 |     Fallible(syn::Expr),
[INFO] [stdout]     |     -------- ^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Action` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 137 -     Fallible(syn::Expr),
[INFO] [stdout] 137 +     Fallible(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FirstSetDisplay` is never constructed
[INFO] [stdout]    --> src/first.rs:116:12
[INFO] [stdout]     |
[INFO] [stdout] 116 | pub struct FirstSetDisplay<'a, 'b, A> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_production` is never used
[INFO] [stdout]    --> src/grammar.rs:186:12
[INFO] [stdout]     |
[INFO] [stdout] 174 | impl<A> NonTerminal<A> {
[INFO] [stdout]     | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 186 |     pub fn get_production(&self, production_idx: ProductionIdx) -> &Production<A> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ProductionIndicesIter` is never constructed
[INFO] [stdout]    --> src/grammar.rs:197:8
[INFO] [stdout]     |
[INFO] [stdout] 197 | struct ProductionIndicesIter<'grammar, A> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SymbolKindDisplay` is never constructed
[INFO] [stdout]    --> src/grammar.rs:301:12
[INFO] [stdout]     |
[INFO] [stdout] 301 | pub struct SymbolKindDisplay<'a, 'b, A> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/grammar.rs:307:12
[INFO] [stdout]     |
[INFO] [stdout] 306 | impl<'a, 'b, A> SymbolKindDisplay<'a, 'b, A> {
[INFO] [stdout]     | -------------------------------------------- associated function in this implementation
[INFO] [stdout] 307 |     pub fn new(symbol: &'a SymbolKind, grammar: &'b Grammar<A>) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/grammar.rs:318:12
[INFO] [stdout]     |
[INFO] [stdout] 317 | impl<'a, 'b, A> ProductionDisplay<'a, 'b, A> {
[INFO] [stdout]     | -------------------------------------------- associated function in this implementation
[INFO] [stdout] 318 |     pub fn new(production: &'a Production<A>, grammar: &'b Grammar<A>) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LR1AutomatonDisplay` is never constructed
[INFO] [stdout]    --> src/lr1.rs:421:12
[INFO] [stdout]     |
[INFO] [stdout] 421 | pub struct LR1AutomatonDisplay<'a, 'b, A> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LR1StateDisplay` is never constructed
[INFO] [stdout]    --> src/lr1.rs:426:8
[INFO] [stdout]     |
[INFO] [stdout] 426 | struct LR1StateDisplay<'a, 'b, A> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LR1ItemDisplay` is never constructed
[INFO] [stdout]    --> src/lr1.rs:431:8
[INFO] [stdout]     |
[INFO] [stdout] 431 | struct LR1ItemDisplay<'a, 'b, A> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LRTableDisplay` is never constructed
[INFO] [stdout]    --> src/lr_common.rs:262:12
[INFO] [stdout]     |
[INFO] [stdout] 262 | pub struct LRTableDisplay<'a, 'b, A> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LRActionDisplay` is never constructed
[INFO] [stdout]    --> src/lr_common.rs:274:12
[INFO] [stdout]     |
[INFO] [stdout] 274 | pub struct LRActionDisplay<'a, 'b, A> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> tests/tests.rs:193:34
[INFO] [stdout]     |
[INFO] [stdout] 187 | /     parser! {
[INFO] [stdout] 188 | |         enum Token {
[INFO] [stdout] 189 | |             "(" => Token::LParen,
[INFO] [stdout] 190 | |             ")" => Token::RParen,
[INFO] [stdout] ...   |
[INFO] [stdout] 193 | |             "int" => Token::Int(<u64>),
[INFO] [stdout]     | |                                  ^^^
[INFO] [stdout] ...   |
[INFO] [stdout] 217 | |         };
[INFO] [stdout] 218 | |     }
[INFO] [stdout]     | |_____- field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `SemanticActionResult` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 193 -             "int" => Token::Int(<u64>),
[INFO] [stdout] 193 +             "int" => Token::Int(<()>),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |     TypeSynonym(TypeSynonym),
[INFO] [stdout]    |     ----------- ^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `GrammarItem` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 15 -     TypeSynonym(TypeSynonym),
[INFO] [stdout] 15 +     TypeSynonym(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `ty` are never read
[INFO] [stdout]   --> src/ast.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 40 | pub struct TypeSynonym {
[INFO] [stdout]    |            ----------- fields in this struct
[INFO] [stdout] 41 |     pub name: syn::Ident,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 42 |     pub ty: syn::Type,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TypeSynonym` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:108:12
[INFO] [stdout]     |
[INFO] [stdout] 108 |     Repeat(Box<Repeat>),
[INFO] [stdout]     |     ------ ^^^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Symbol` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 108 -     Repeat(Box<Repeat>),
[INFO] [stdout] 108 +     Repeat(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `op` and `symbol` are never read
[INFO] [stdout]    --> src/ast.rs:123:9
[INFO] [stdout]     |
[INFO] [stdout] 122 | pub struct Repeat {
[INFO] [stdout]     |            ------ fields in this struct
[INFO] [stdout] 123 |     pub op: RepeatOp,
[INFO] [stdout]     |         ^^
[INFO] [stdout] 124 |     pub symbol: Symbol,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Repeat` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/ast.rs:137:14
[INFO] [stdout]     |
[INFO] [stdout] 137 |     Fallible(syn::Expr),
[INFO] [stdout]     |     -------- ^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Action` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 137 -     Fallible(syn::Expr),
[INFO] [stdout] 137 +     Fallible(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FirstSetDisplay` is never constructed
[INFO] [stdout]    --> src/first.rs:116:12
[INFO] [stdout]     |
[INFO] [stdout] 116 | pub struct FirstSetDisplay<'a, 'b, A> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ProductionIndicesIter` is never constructed
[INFO] [stdout]    --> src/grammar.rs:197:8
[INFO] [stdout]     |
[INFO] [stdout] 197 | struct ProductionIndicesIter<'grammar, A> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.49s
[INFO] running `Command { std: "docker" "inspect" "1ff60a578f258af37bc8a45a90523f26360a5e1536cb022d82fae98ae44f1665", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ff60a578f258af37bc8a45a90523f26360a5e1536cb022d82fae98ae44f1665", kill_on_drop: false }`
[INFO] [stdout] 1ff60a578f258af37bc8a45a90523f26360a5e1536cb022d82fae98ae44f1665