[INFO] cloning repository https://github.com/UnicodeSnowman/writing_an_interpreter_in_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/UnicodeSnowman/writing_an_interpreter_in_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUnicodeSnowman%2Fwriting_an_interpreter_in_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUnicodeSnowman%2Fwriting_an_interpreter_in_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0952a8d5bbdba06124f3cc94e5528daa4a81c828
[INFO] checking UnicodeSnowman/writing_an_interpreter_in_rust/0952a8d5bbdba06124f3cc94e5528daa4a81c828 against 3d50c25bc66853bf0ad205529d0f305a1d841b5e for pr-159598
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FUnicodeSnowman%2Fwriting_an_interpreter_in_rust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/UnicodeSnowman/writing_an_interpreter_in_rust
[INFO] finished tweaking git repo https://github.com/UnicodeSnowman/writing_an_interpreter_in_rust
[INFO] tweaked toml for git repo https://github.com/UnicodeSnowman/writing_an_interpreter_in_rust written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/UnicodeSnowman/writing_an_interpreter_in_rust on toolchain 3d50c25bc66853bf0ad205529d0f305a1d841b5e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3d50c25bc66853bf0ad205529d0f305a1d841b5e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/UnicodeSnowman/writing_an_interpreter_in_rust 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" "+3d50c25bc66853bf0ad205529d0f305a1d841b5e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `writing_an_interpreter_in_rust` (manifest) generated 1 warning
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 49630074f55054c27c5454c822c7a949a0077c551ba01609fefb58a1668c9733
[INFO] running `Command { std: "docker" "start" "49630074f55054c27c5454c822c7a949a0077c551ba01609fefb58a1668c9733", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49630074f55054c27c5454c822c7a949a0077c551ba01609fefb58a1668c9733", 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" "49630074f55054c27c5454c822c7a949a0077c551ba01609fefb58a1668c9733" "/opt/rustwide/cargo-home/bin/cargo" "+3d50c25bc66853bf0ad205529d0f305a1d841b5e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49630074f55054c27c5454c822c7a949a0077c551ba01609fefb58a1668c9733", 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" "49630074f55054c27c5454c822c7a949a0077c551ba01609fefb58a1668c9733" "/opt/rustwide/cargo-home/bin/cargo" "+3d50c25bc66853bf0ad205529d0f305a1d841b5e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] warning: Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `writing_an_interpreter_in_rust` (manifest) generated 1 warning
[INFO] [stderr]     Checking writing_an_interpreter_in_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `slice_patterns` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_patterns)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:16:29
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub statements: Vec<Box<Statement>>
[INFO] [stdout]    |                             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub statements: Vec<Box<dyn Statement>>
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |     value: Box<Expression>
[INFO] [stdout]    |                ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 32 |     value: Box<dyn Expression>
[INFO] [stdout]    |                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `slice_patterns` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_patterns)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:16:29
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub statements: Vec<Box<Statement>>
[INFO] [stdout]    |                             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub statements: Vec<Box<dyn Statement>>
[INFO] [stdout]    |                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/ast.rs:32:16
[INFO] [stdout]    |
[INFO] [stdout] 32 |     value: Box<Expression>
[INFO] [stdout]    |                ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 32 |     value: Box<dyn Expression>
[INFO] [stdout]    |                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `blah`
[INFO] [stdout]   --> src/parser.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let blah = lexer.current_token();
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_blah`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Statement` is more private than the item `Program::statements`
[INFO] [stdout]   --> src/ast.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub statements: Vec<Box<Statement>>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field `Program::statements` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but trait `Statement` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/ast.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout]  7 | trait Statement: Node {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `token_literal` is never used
[INFO] [stdout]  --> src/ast.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait Node {
[INFO] [stdout]   |       ---- method in this trait
[INFO] [stdout] 4 |     fn token_literal(&self) -> &str;
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `statement_node` is never used
[INFO] [stdout]  --> src/ast.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | trait Statement: Node {
[INFO] [stdout]   |       --------- method in this trait
[INFO] [stdout] 8 |     fn statement_node(&self);
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `expression_node` is never used
[INFO] [stdout]   --> src/ast.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | trait Expression: Node {
[INFO] [stdout]    |       ---------- method in this trait
[INFO] [stdout] 12 |     fn expression_node(&self);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `token_literal` is never used
[INFO] [stdout]   --> src/ast.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl Program {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 20 |     fn token_literal(&self) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `token`, `name`, and `value` are never read
[INFO] [stdout]   --> src/ast.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct LetStatement<'a> {
[INFO] [stdout]    |            ------------ fields in this struct
[INFO] [stdout] 30 |     token: token::Token<'a>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 31 |     name: Identifier<'a>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 32 |     value: Box<Expression>
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `token` and `value` are never read
[INFO] [stdout]   --> src/ast.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 45 | struct Identifier<'a> {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 46 |     token: token::Token<'a>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 47 |     value: &'a str
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `lexer`, `errors`, `current_token`, and `peek_token` are never read
[INFO] [stdout]  --> src/parser.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Parser<'p> {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 6 |     lexer: &'p mut Lexer,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     errors: Vec<&'p str>,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 8 |     current_token: Token<'p>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 9 |     peek_token: Token<'p>
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `next_token` is never used
[INFO] [stdout]   --> src/parser.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<'p, 'l: 'p> Parser<'p> {
[INFO] [stdout]    | --------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 46 |     fn next_token(&'p mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lexer.rs:33:24
[INFO] [stdout]    |
[INFO] [stdout] 33 |   pub fn current_token(&self) -> token::Token {
[INFO] [stdout]    |                        ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 33 |   pub fn current_token(&self) -> token::Token<'_> {
[INFO] [stdout]    |                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lexer.rs:46:21
[INFO] [stdout]    |
[INFO] [stdout] 46 |   pub fn next_token(& mut self) -> token::Token {
[INFO] [stdout]    |                     ^^^^^^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 46 |   pub fn next_token(& mut self) -> token::Token<'_> {
[INFO] [stdout]    |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `blah`
[INFO] [stdout]   --> src/parser.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let blah = lexer.current_token();
[INFO] [stdout]    |             ^^^^ help: if this is intentional, prefix it with an underscore: `_blah`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Statement` is more private than the item `Program::statements`
[INFO] [stdout]   --> src/ast.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     pub statements: Vec<Box<Statement>>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ field `Program::statements` is reachable at visibility `pub`
[INFO] [stdout]    |
[INFO] [stdout] note: but trait `Statement` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/ast.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout]  7 | trait Statement: Node {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `token_literal` is never used
[INFO] [stdout]  --> src/ast.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait Node {
[INFO] [stdout]   |       ---- method in this trait
[INFO] [stdout] 4 |     fn token_literal(&self) -> &str;
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `statement_node` is never used
[INFO] [stdout]  --> src/ast.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | trait Statement: Node {
[INFO] [stdout]   |       --------- method in this trait
[INFO] [stdout] 8 |     fn statement_node(&self);
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `expression_node` is never used
[INFO] [stdout]   --> src/ast.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | trait Expression: Node {
[INFO] [stdout]    |       ---------- method in this trait
[INFO] [stdout] 12 |     fn expression_node(&self);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `token_literal` is never used
[INFO] [stdout]   --> src/ast.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl Program {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] 20 |     fn token_literal(&self) -> &str {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `token`, `name`, and `value` are never read
[INFO] [stdout]   --> src/ast.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct LetStatement<'a> {
[INFO] [stdout]    |            ------------ fields in this struct
[INFO] [stdout] 30 |     token: token::Token<'a>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 31 |     name: Identifier<'a>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 32 |     value: Box<Expression>
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `token` and `value` are never read
[INFO] [stdout]   --> src/ast.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 45 | struct Identifier<'a> {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 46 |     token: token::Token<'a>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 47 |     value: &'a str
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `lexer`, `errors`, `current_token`, and `peek_token` are never read
[INFO] [stdout]  --> src/parser.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct Parser<'p> {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 6 |     lexer: &'p mut Lexer,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     errors: Vec<&'p str>,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 8 |     current_token: Token<'p>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 9 |     peek_token: Token<'p>
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `next_token` is never used
[INFO] [stdout]   --> src/parser.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<'p, 'l: 'p> Parser<'p> {
[INFO] [stdout]    | --------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 46 |     fn next_token(&'p mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lexer.rs:33:24
[INFO] [stdout]    |
[INFO] [stdout] 33 |   pub fn current_token(&self) -> token::Token {
[INFO] [stdout]    |                        ^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 33 |   pub fn current_token(&self) -> token::Token<'_> {
[INFO] [stdout]    |                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lexer.rs:46:21
[INFO] [stdout]    |
[INFO] [stdout] 46 |   pub fn next_token(& mut self) -> token::Token {
[INFO] [stdout]    |                     ^^^^^^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 46 |   pub fn next_token(& mut self) -> token::Token<'_> {
[INFO] [stdout]    |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "49630074f55054c27c5454c822c7a949a0077c551ba01609fefb58a1668c9733", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49630074f55054c27c5454c822c7a949a0077c551ba01609fefb58a1668c9733", kill_on_drop: false }`
[INFO] [stdout] 49630074f55054c27c5454c822c7a949a0077c551ba01609fefb58a1668c9733
