[INFO] cloning repository https://github.com/joaovicdsantos/writing-an-interpreter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/joaovicdsantos/writing-an-interpreter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoaovicdsantos%2Fwriting-an-interpreter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoaovicdsantos%2Fwriting-an-interpreter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7fc234f36549139293510d0bd9b6055e45684e25
[INFO] checking joaovicdsantos/writing-an-interpreter against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoaovicdsantos%2Fwriting-an-interpreter" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/joaovicdsantos/writing-an-interpreter on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/joaovicdsantos/writing-an-interpreter
[INFO] finished tweaking git repo https://github.com/joaovicdsantos/writing-an-interpreter
[INFO] tweaked toml for git repo https://github.com/joaovicdsantos/writing-an-interpreter written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/joaovicdsantos/writing-an-interpreter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c6d77a3eaed2eeef017689936ecfe359f72497f9b52121ec51ee8e6747ec3f2
[INFO] running `Command { std: "docker" "start" "-a" "4c6d77a3eaed2eeef017689936ecfe359f72497f9b52121ec51ee8e6747ec3f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c6d77a3eaed2eeef017689936ecfe359f72497f9b52121ec51ee8e6747ec3f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c6d77a3eaed2eeef017689936ecfe359f72497f9b52121ec51ee8e6747ec3f2", kill_on_drop: false }`
[INFO] [stdout] 4c6d77a3eaed2eeef017689936ecfe359f72497f9b52121ec51ee8e6747ec3f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9633e1a3d9a3e235b8d6f2e7159ec92418aaf0ebab6f14eaf2da649121098206
[INFO] running `Command { std: "docker" "start" "-a" "9633e1a3d9a3e235b8d6f2e7159ec92418aaf0ebab6f14eaf2da649121098206", kill_on_drop: false }`
[INFO] [stderr]     Checking writing-an-interpreter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `precedence`
[INFO] [stdout]    --> src/parser/parser.rs:204:36
[INFO] [stdout]     |
[INFO] [stdout] 204 |     fn parse_expression(&mut self, precedence: u8) -> Option<Box<dyn Expression>> {
[INFO] [stdout]     |                                    ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_precedence`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `statement_node`, `as_let_statement`, `as_return_statement`, and `as_expression_statement` are never used
[INFO] [stdout]   --> src/ast/ast.rs:9:8
[INFO] [stdout]    |
[INFO] [stdout] 8  | pub trait Statement: Node {
[INFO] [stdout]    |           --------- methods in this trait
[INFO] [stdout] 9  |     fn statement_node(&self);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 10 |     fn as_let_statement(&self) -> Option<&LetStatement> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn as_return_statement(&self) -> Option<&ReturnStatement> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn as_expression_statement(&self) -> Option<&ExpressionStatement> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `expression_node` and `as_identifier_expression` are never used
[INFO] [stdout]   --> src/ast/ast.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub trait Expression: Node {
[INFO] [stdout]    |           ---------- methods in this trait
[INFO] [stdout] 22 |     fn expression_node(&self);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 23 |     fn as_identifier_expression(&self) -> Option<&Identifier> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `PrefixParseFn` is never used
[INFO] [stdout]   --> src/parser/parser.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | type PrefixParseFn = fn(&mut Parser) -> Box<dyn Expression>;
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `InfixParseFn` is never used
[INFO] [stdout]   --> src/parser/parser.rs:14:6
[INFO] [stdout]    |
[INFO] [stdout] 14 | type InfixParseFn = fn(&mut Parser, dyn Expression) -> Box<dyn Expression>;
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LOWEST` is never used
[INFO] [stdout]   --> src/parser/parser.rs:16:7
[INFO] [stdout]    |
[INFO] [stdout] 16 | const LOWEST: u8 = 1;
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `EQUALS` is never used
[INFO] [stdout]   --> src/parser/parser.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 | const EQUALS: u8 = 2;
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LESSGREATER` is never used
[INFO] [stdout]   --> src/parser/parser.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | const LESSGREATER: u8 = 3;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SUM` is never used
[INFO] [stdout]   --> src/parser/parser.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | const SUM: u8 = 4;
[INFO] [stdout]    |       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PRODUCT` is never used
[INFO] [stdout]   --> src/parser/parser.rs:20:7
[INFO] [stdout]    |
[INFO] [stdout] 20 | const PRODUCT: u8 = 5;
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PREFIX` is never used
[INFO] [stdout]   --> src/parser/parser.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const PREFIX: u8 = 6;
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CALL` is never used
[INFO] [stdout]   --> src/parser/parser.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | const CALL: u8 = 7;
[INFO] [stdout]    |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]   --> src/parser/parser.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Parser {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/parser/parser.rs:34:8
[INFO] [stdout]     |
[INFO] [stdout] 33  | impl Parser {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout] 34  |     fn new(lexer: Lexer) -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 52  |     fn next_token(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57  |     fn parse_program(&mut self) -> Program {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 71  |     fn parse_statement(&mut self) -> Option<Box<dyn Statement>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83  |     fn parse_let_statement(&mut self) -> Option<Box<LetStatement>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 120 |     fn parse_return_statement(&mut self) -> Option<Box<ReturnStatement>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 142 |     fn parse_expression_statement(&mut self) -> Option<Box<ExpressionStatement>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 160 |     fn cur_token_is(&self, token: TokenType) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 167 |     fn peek_token_is(&self, token: TokenType) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 174 |     fn expect_peek(&mut self, token: TokenType) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 184 |     fn peek_error(&mut self, token: TokenType) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 196 |     fn register_prefix(&mut self, token_type: TokenType, fun: PrefixParseFn) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 200 |     fn register_infix(&mut self, token_type: TokenType, fun: InfixParseFn) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 204 |     fn parse_expression(&mut self, precedence: u8) -> Option<Box<dyn Expression>> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 220 |     fn parse_identifier(&mut self) -> Box<dyn Expression> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `precedence`
[INFO] [stdout]    --> src/parser/parser.rs:204:36
[INFO] [stdout]     |
[INFO] [stdout] 204 |     fn parse_expression(&mut self, precedence: u8) -> Option<Box<dyn Expression>> {
[INFO] [stdout]     |                                    ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_precedence`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `statement_node` is never used
[INFO] [stdout]  --> src/ast/ast.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub trait Statement: Node {
[INFO] [stdout]   |           --------- method in this trait
[INFO] [stdout] 9 |     fn statement_node(&self);
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `expression_node` is never used
[INFO] [stdout]   --> src/ast/ast.rs:22:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub trait Expression: Node {
[INFO] [stdout]    |           ---------- method in this trait
[INFO] [stdout] 22 |     fn expression_node(&self);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `EQUALS` is never used
[INFO] [stdout]   --> src/parser/parser.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 | const EQUALS: u8 = 2;
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LESSGREATER` is never used
[INFO] [stdout]   --> src/parser/parser.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | const LESSGREATER: u8 = 3;
[INFO] [stdout]    |       ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SUM` is never used
[INFO] [stdout]   --> src/parser/parser.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | const SUM: u8 = 4;
[INFO] [stdout]    |       ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PRODUCT` is never used
[INFO] [stdout]   --> src/parser/parser.rs:20:7
[INFO] [stdout]    |
[INFO] [stdout] 20 | const PRODUCT: u8 = 5;
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `PREFIX` is never used
[INFO] [stdout]   --> src/parser/parser.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const PREFIX: u8 = 6;
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CALL` is never used
[INFO] [stdout]   --> src/parser/parser.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | const CALL: u8 = 7;
[INFO] [stdout]    |       ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `infix_parse_fns` is never read
[INFO] [stdout]   --> src/parser/parser.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Parser {
[INFO] [stdout]    |        ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 30 |     infix_parse_fns: HashMap<TokenType, InfixParseFn>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `register_infix` is never used
[INFO] [stdout]    --> src/parser/parser.rs:200:8
[INFO] [stdout]     |
[INFO] [stdout] 33  | impl Parser {
[INFO] [stdout]     | ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 200 |     fn register_infix(&mut self, token_type: TokenType, fun: InfixParseFn) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "9633e1a3d9a3e235b8d6f2e7159ec92418aaf0ebab6f14eaf2da649121098206", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9633e1a3d9a3e235b8d6f2e7159ec92418aaf0ebab6f14eaf2da649121098206", kill_on_drop: false }`
[INFO] [stdout] 9633e1a3d9a3e235b8d6f2e7159ec92418aaf0ebab6f14eaf2da649121098206