[INFO] cloning repository https://github.com/yuchiki/parser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yuchiki/parser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuchiki%2Fparser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuchiki%2Fparser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8974be94736ce4e7a10cf9beed4ac00f77fcc14b
[INFO] testing yuchiki/parser against beta-2024-12-08 for beta-1.84.0-4-retry
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuchiki%2Fparser" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yuchiki/parser on toolchain beta-2024-12-08
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-12-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yuchiki/parser
[INFO] finished tweaking git repo https://github.com/yuchiki/parser
[INFO] tweaked toml for git repo https://github.com/yuchiki/parser written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/yuchiki/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" "+beta-2024-12-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] testing yuchiki/parser against beta-2024-12-08 for beta-1.84.0-4-retry
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyuchiki%2Fparser" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yuchiki/parser on toolchain beta-2024-12-08
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-12-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yuchiki/parser
[INFO] finished tweaking git repo https://github.com/yuchiki/parser
[INFO] tweaked toml for git repo https://github.com/yuchiki/parser written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/yuchiki/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" "+beta-2024-12-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-12-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 14f6de6e1eeeb0333e702fbc962a56ba3a2ed9ef41d7206f4b3c6f35b6444b8d
[INFO] running `Command { std: "docker" "start" "-a" "14f6de6e1eeeb0333e702fbc962a56ba3a2ed9ef41d7206f4b3c6f35b6444b8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14f6de6e1eeeb0333e702fbc962a56ba3a2ed9ef41d7206f4b3c6f35b6444b8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14f6de6e1eeeb0333e702fbc962a56ba3a2ed9ef41d7206f4b3c6f35b6444b8d", kill_on_drop: false }`
[INFO] [stdout] 14f6de6e1eeeb0333e702fbc962a56ba3a2ed9ef41d7206f4b3c6f35b6444b8d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-12-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0bd7583512f58bfa6cb4e8a921bb67d9ba64c5a50d04658a9e159f1d123874f1
[INFO] running `Command { std: "docker" "start" "-a" "0bd7583512f58bfa6cb4e8a921bb67d9ba64c5a50d04658a9e159f1d123874f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:166:29
[INFO] [stdout]     |
[INFO] [stdout] 166 | fn lex_number(input: &[u8], mut pos: usize) -> Result<(Token, usize), LexError> {
[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/main.rs:175:30
[INFO] [stdout]     |
[INFO] [stdout] 175 | fn skip_spaces(input: &[u8], mut pos: usize) -> Result<((), usize), LexError> {
[INFO] [stdout]     |                              ----^^^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `merge` is never used
[INFO] [stdout]   --> src/main.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl Loc {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] 10 |     fn merge(&self, other: &Loc) -> Loc {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `UniOpKind` is never used
[INFO] [stdout]    --> src/main.rs:208:6
[INFO] [stdout]     |
[INFO] [stdout] 208 | enum UniOpKind {
[INFO] [stdout]     |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `UniOp` is never used
[INFO] [stdout]    --> src/main.rs:213:6
[INFO] [stdout]     |
[INFO] [stdout] 213 | type UniOp = Annot<UniOpKind>;
[INFO] [stdout]     |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `plus` and `minus` are never used
[INFO] [stdout]    --> src/main.rs:216:8
[INFO] [stdout]     |
[INFO] [stdout] 215 | impl UniOp {
[INFO] [stdout]     | ---------- associated functions in this implementation
[INFO] [stdout] 216 |     fn plus(loc: Loc) -> Self {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 220 |     fn minus(loc: Loc) -> Self {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `BinOpKind` is never used
[INFO] [stdout]    --> src/main.rs:226:6
[INFO] [stdout]     |
[INFO] [stdout] 226 | enum BinOpKind {
[INFO] [stdout]     |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `BinOp` is never used
[INFO] [stdout]    --> src/main.rs:233:6
[INFO] [stdout]     |
[INFO] [stdout] 233 | type BinOp = Annot<BinOpKind>;
[INFO] [stdout]     |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `add`, `sub`, `mult`, and `div` are never used
[INFO] [stdout]    --> src/main.rs:236:8
[INFO] [stdout]     |
[INFO] [stdout] 235 | impl BinOp {
[INFO] [stdout]     | ---------- associated functions in this implementation
[INFO] [stdout] 236 |     fn add(loc: Loc) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 239 |     fn sub(loc: Loc) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 242 |     fn mult(loc: Loc) -> Self {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 245 |     fn div(loc: Loc) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `AstKind` is never used
[INFO] [stdout]    --> src/main.rs:251:6
[INFO] [stdout]     |
[INFO] [stdout] 251 | enum AstKind {
[INFO] [stdout]     |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Ast` is never used
[INFO] [stdout]    --> src/main.rs:257:6
[INFO] [stdout]     |
[INFO] [stdout] 257 | type Ast = Annot<AstKind>;
[INFO] [stdout]     |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `num`, `uniop`, and `binop` are never used
[INFO] [stdout]    --> src/main.rs:260:8
[INFO] [stdout]     |
[INFO] [stdout] 259 | impl Ast {
[INFO] [stdout]     | -------- associated functions in this implementation
[INFO] [stdout] 260 |     fn num(n: u64, loc: Loc) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 264 |     fn uniop(op: UniOp, e: Ast, loc: Loc) -> Self {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 268 |     fn binop(op: BinOp, l: Ast, r: Ast, loc: Loc) -> Self {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ParseError` is never used
[INFO] [stdout]    --> src/main.rs:281:6
[INFO] [stdout]     |
[INFO] [stdout] 281 | enum ParseError {
[INFO] [stdout]     |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse` is never used
[INFO] [stdout]    --> src/main.rs:290:4
[INFO] [stdout]     |
[INFO] [stdout] 290 | fn parse(tokens: Vec<Token>) -> Result<Ast, ParseError> {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_expr` is never used
[INFO] [stdout]    --> src/main.rs:299:4
[INFO] [stdout]     |
[INFO] [stdout] 299 | fn parse_expr<Tokens>(tokens: &mut Peekable<Tokens>) -> Result<Ast, ParseError>
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_expr3` is never used
[INFO] [stdout]    --> src/main.rs:306:4
[INFO] [stdout]     |
[INFO] [stdout] 306 | fn parse_expr3<Tokens>(tokens: &mut Peekable<Tokens>) -> Result<Ast, ParseError>
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_expr2` is never used
[INFO] [stdout]    --> src/main.rs:334:4
[INFO] [stdout]     |
[INFO] [stdout] 334 | fn parse_expr2<Tokens>(tokens: &mut Peekable<Tokens>) -> Result<Ast, ParseError>
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_expr1` is never used
[INFO] [stdout]    --> src/main.rs:362:4
[INFO] [stdout]     |
[INFO] [stdout] 362 | fn parse_expr1<Tokens>(tokens: &mut Peekable<Tokens>) -> Result<Ast, ParseError>
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_atom` is never used
[INFO] [stdout]    --> src/main.rs:387:4
[INFO] [stdout]     |
[INFO] [stdout] 387 | fn parse_atom<Tokens>(tokens: &mut Peekable<Tokens>) -> Result<Ast, ParseError>
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "0bd7583512f58bfa6cb4e8a921bb67d9ba64c5a50d04658a9e159f1d123874f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bd7583512f58bfa6cb4e8a921bb67d9ba64c5a50d04658a9e159f1d123874f1", kill_on_drop: false }`
[INFO] [stdout] 0bd7583512f58bfa6cb4e8a921bb67d9ba64c5a50d04658a9e159f1d123874f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-12-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81c68a201d498273998abccc257198380135b279af162f80e14aefe5fc8c9a1e
[INFO] running `Command { std: "docker" "start" "-a" "81c68a201d498273998abccc257198380135b279af162f80e14aefe5fc8c9a1e", kill_on_drop: false }`
[INFO] [stderr]    Compiling parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:166:29
[INFO] [stdout]     |
[INFO] [stdout] 166 | fn lex_number(input: &[u8], mut pos: usize) -> Result<(Token, usize), LexError> {
[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/main.rs:175:30
[INFO] [stdout]     |
[INFO] [stdout] 175 | fn skip_spaces(input: &[u8], mut pos: usize) -> Result<((), usize), LexError> {
[INFO] [stdout]     |                              ----^^^
[INFO] [stdout]     |                              |
[INFO] [stdout]     |                              help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `UnexpectedToken` and `NotOperator` are never constructed
[INFO] [stdout]    --> src/main.rs:282:5
[INFO] [stdout]     |
[INFO] [stdout] 281 | enum ParseError {
[INFO] [stdout]     |      ---------- variants in this enum
[INFO] [stdout] 282 |     UnexpectedToken(Token),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 283 |     NotExpression(Token),
[INFO] [stdout] 284 |     NotOperator(Token),
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ParseError` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "81c68a201d498273998abccc257198380135b279af162f80e14aefe5fc8c9a1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81c68a201d498273998abccc257198380135b279af162f80e14aefe5fc8c9a1e", kill_on_drop: false }`
[INFO] [stdout] 81c68a201d498273998abccc257198380135b279af162f80e14aefe5fc8c9a1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-12-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c3eedc0b6e3d0d5aba9c0eb6d5427058e0f16369e3bbb4a1a6f2ff9ff87153a6
[INFO] running `Command { std: "docker" "start" "-a" "c3eedc0b6e3d0d5aba9c0eb6d5427058e0f16369e3bbb4a1a6f2ff9ff87153a6", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:166:29
[INFO] [stderr]     |
[INFO] [stderr] 166 | fn lex_number(input: &[u8], mut pos: usize) -> Result<(Token, usize), LexError> {
[INFO] [stderr]     |                             ----^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:175:30
[INFO] [stderr]     |
[INFO] [stderr] 175 | fn skip_spaces(input: &[u8], mut pos: usize) -> Result<((), usize), LexError> {
[INFO] [stderr]     |                              ----^^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variants `UnexpectedToken` and `NotOperator` are never constructed
[INFO] [stderr]    --> src/main.rs:282:5
[INFO] [stderr]     |
[INFO] [stderr] 281 | enum ParseError {
[INFO] [stderr]     |      ---------- variants in this enum
[INFO] [stderr] 282 |     UnexpectedToken(Token),
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 283 |     NotExpression(Token),
[INFO] [stderr] 284 |     NotOperator(Token),
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `ParseError` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `parser` (bin "parser" test) generated 3 warnings (run `cargo fix --bin "parser" --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/parser-19584304e9998563)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test test_lexer ... ok
[INFO] [stdout] test test_parser ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c3eedc0b6e3d0d5aba9c0eb6d5427058e0f16369e3bbb4a1a6f2ff9ff87153a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3eedc0b6e3d0d5aba9c0eb6d5427058e0f16369e3bbb4a1a6f2ff9ff87153a6", kill_on_drop: false }`
[INFO] [stdout] c3eedc0b6e3d0d5aba9c0eb6d5427058e0f16369e3bbb4a1a6f2ff9ff87153a6
