[INFO] cloning repository https://github.com/emmet-horgan/rlox
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emmet-horgan/rlox" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femmet-horgan%2Frlox", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femmet-horgan%2Frlox'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a202a790bb06dc58997708b9168048d5a1275de8
[INFO] checking emmet-horgan/rlox against master#8387315ab3c26a57a1f53a90f188f0bc88514bca for pr-124605
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femmet-horgan%2Frlox" "/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/emmet-horgan/rlox on toolchain 8387315ab3c26a57a1f53a90f188f0bc88514bca
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8387315ab3c26a57a1f53a90f188f0bc88514bca" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/emmet-horgan/rlox
[INFO] finished tweaking git repo https://github.com/emmet-horgan/rlox
[INFO] tweaked toml for git repo https://github.com/emmet-horgan/rlox written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/emmet-horgan/rlox 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" "+8387315ab3c26a57a1f53a90f188f0bc88514bca" "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
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking emmet-horgan/rlox against try#fcc50f77e1a14e407d895972348a0ff09eafc210 for pr-124605
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femmet-horgan%2Frlox" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/emmet-horgan/rlox on toolchain fcc50f77e1a14e407d895972348a0ff09eafc210
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fcc50f77e1a14e407d895972348a0ff09eafc210" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/emmet-horgan/rlox
[INFO] finished tweaking git repo https://github.com/emmet-horgan/rlox
[INFO] tweaked toml for git repo https://github.com/emmet-horgan/rlox written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/emmet-horgan/rlox 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" "+fcc50f77e1a14e407d895972348a0ff09eafc210" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+fcc50f77e1a14e407d895972348a0ff09eafc210" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3def000bbe260a44da508482eaa17fec6e6a7cc0a4a7b928a907b5a8d45c7174
[INFO] running `Command { std: "docker" "start" "-a" "3def000bbe260a44da508482eaa17fec6e6a7cc0a4a7b928a907b5a8d45c7174", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3def000bbe260a44da508482eaa17fec6e6a7cc0a4a7b928a907b5a8d45c7174", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3def000bbe260a44da508482eaa17fec6e6a7cc0a4a7b928a907b5a8d45c7174", kill_on_drop: false }`
[INFO] [stdout] 3def000bbe260a44da508482eaa17fec6e6a7cc0a4a7b928a907b5a8d45c7174
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+fcc50f77e1a14e407d895972348a0ff09eafc210" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 771425a9df3ffdf112f6b6c163c5ce923920622d6b1899af74b6d65cfe24eaf6
[INFO] running `Command { std: "docker" "start" "-a" "771425a9df3ffdf112f6b6c163c5ce923920622d6b1899af74b6d65cfe24eaf6", kill_on_drop: false }`
[INFO] [stderr]     Checking rlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `scanner::Scanner`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use scanner::Scanner;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `scanner::Scanner`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use scanner::Scanner;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/token.rs:94:13
[INFO] [stdout]    |
[INFO] [stdout] 94 |             _ => write!(f, "Uknown")
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/token.rs:94:13
[INFO] [stdout]    |
[INFO] [stdout] 94 |             _ => write!(f, "Uknown")
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lox`
[INFO] [stdout]   --> src/main.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn run(lox: &str) -> Result<(), Error> {
[INFO] [stdout]    |        ^^^ help: if this is intentional, prefix it with an underscore: `_lox`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Err` and `RtErr` are never constructed
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum Error {
[INFO] [stdout]   |      ----- variants in this enum
[INFO] [stdout] 8 |     Err,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 9 |     RtErr
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `source` and `tokens` are never read
[INFO] [stdout]  --> src/scanner.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Scanner {
[INFO] [stdout]   |            ------- fields in this struct
[INFO] [stdout] 7 |     source: Vec<char>,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 8 |     tokens: Vec<Token>,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/scanner.rs:17:12
[INFO] [stdout]     |
[INFO] [stdout] 15  | impl Scanner {
[INFO] [stdout]     | ------------ associated items in this implementation
[INFO] [stdout] 16  |
[INFO] [stdout] 17  |     pub fn new() -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 45  |     pub fn from(source: &str) -> Self {
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73  |     fn advance(&mut self) -> Result<char, ()> {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 82  |     fn at_end(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 86  |     fn peek(&self) -> char {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 94  |     fn peek_next(&self) -> char {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 102 |     fn string(&mut self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 121 |     fn identifier(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 140 |     fn number(&mut self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 163 |     fn match_char(&mut self, c: &char) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 175 |     fn scan_token(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 248 |     fn scan_tokens(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/token.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 2  | pub enum TokenType {
[INFO] [stdout]    |          --------- variants in this enum
[INFO] [stdout] 3  |     // Single-character tokens.
[INFO] [stdout] 4  |     LeftParen,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 5  |     RightParen,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 6  |     LeftBrace,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 7  |     RightBrace,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 8  |     Comma,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 9  |     Dot,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 10 |     Minus,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 11 |     Plus,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 12 |     SemiColon,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 13 |     Slash,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 14 |     Star,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     Bang,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 18 |     BangEqual,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 19 |     Equal,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 20 |     EqualEqual,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 21 |     Greater,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 22 |     GreaterEqual,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 23 |     Less,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 24 |     LessEqual,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     Identifier,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 28 |     String,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 29 |     Number,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 32 |     And,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 33 |     Class,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 34 |     Else,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 35 |     False,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 36 |     Fun,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 37 |     For,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 38 |     If,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 39 |     Nil,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 40 |     Or,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 41 |     Print,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 42 |     Return,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 43 |     Super,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 44 |     This,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 45 |     True,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 46 |     Var,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 47 |     While,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 48 |
[INFO] [stdout] 49 |     Eof,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TokenType` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Number`, `String`, and `None` are never constructed
[INFO] [stdout]    --> src/token.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 100 | pub enum Literal {
[INFO] [stdout]     |          ------- variants in this enum
[INFO] [stdout] 101 |     Number(f64),
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 102 |     String(String),
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 103 |     None
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `line` is never read
[INFO] [stdout]    --> src/token.rs:120:5
[INFO] [stdout]     |
[INFO] [stdout] 116 | pub struct Token {
[INFO] [stdout]     |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 120 |     line: usize,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]    --> src/token.rs:124:12
[INFO] [stdout]     |
[INFO] [stdout] 123 | impl Token {
[INFO] [stdout]     | ---------- associated function in this implementation
[INFO] [stdout] 124 |     pub fn new(token_type: TokenType, lexeme: String, literal: Literal, line: usize) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lox`
[INFO] [stdout]   --> src/main.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn run(lox: &str) -> Result<(), Error> {
[INFO] [stdout]    |        ^^^ help: if this is intentional, prefix it with an underscore: `_lox`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Err` and `RtErr` are never constructed
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum Error {
[INFO] [stdout]   |      ----- variants in this enum
[INFO] [stdout] 8 |     Err,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 9 |     RtErr
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/scanner.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Scanner {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 16 |
[INFO] [stdout] 17 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `line` is never read
[INFO] [stdout]    --> src/token.rs:120:5
[INFO] [stdout]     |
[INFO] [stdout] 116 | pub struct Token {
[INFO] [stdout]     |            ----- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 120 |     line: usize,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "771425a9df3ffdf112f6b6c163c5ce923920622d6b1899af74b6d65cfe24eaf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "771425a9df3ffdf112f6b6c163c5ce923920622d6b1899af74b6d65cfe24eaf6", kill_on_drop: false }`
[INFO] [stdout] 771425a9df3ffdf112f6b6c163c5ce923920622d6b1899af74b6d65cfe24eaf6