[INFO] cloning repository https://github.com/hatchan/interpreter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hatchan/interpreter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhatchan%2Finterpreter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhatchan%2Finterpreter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4b27b2dd9174dbb06a4ba9be492ba788535bd471
[INFO] checking hatchan/interpreter against try#9d63f825c0d409b0e1743a2c84b33f86965e5929 for pr-136968
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhatchan%2Finterpreter" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hatchan/interpreter on toolchain 9d63f825c0d409b0e1743a2c84b33f86965e5929
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9d63f825c0d409b0e1743a2c84b33f86965e5929" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hatchan/interpreter
[INFO] finished tweaking git repo https://github.com/hatchan/interpreter
[INFO] tweaked toml for git repo https://github.com/hatchan/interpreter written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/hatchan/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" "+9d63f825c0d409b0e1743a2c84b33f86965e5929" "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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+9d63f825c0d409b0e1743a2c84b33f86965e5929" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 405fd23d676849029e9121f5429b9c08d1011c4f98b498c5bc7eb4d30309cfd4
[INFO] running `Command { std: "docker" "start" "-a" "405fd23d676849029e9121f5429b9c08d1011c4f98b498c5bc7eb4d30309cfd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "405fd23d676849029e9121f5429b9c08d1011c4f98b498c5bc7eb4d30309cfd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "405fd23d676849029e9121f5429b9c08d1011c4f98b498c5bc7eb4d30309cfd4", kill_on_drop: false }`
[INFO] [stdout] 405fd23d676849029e9121f5429b9c08d1011c4f98b498c5bc7eb4d30309cfd4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+9d63f825c0d409b0e1743a2c84b33f86965e5929" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d2fa49a66d899be9ae8aa476e008de21cdad04f28585e01d24b823427fc9ad4
[INFO] running `Command { std: "docker" "start" "-a" "1d2fa49a66d899be9ae8aa476e008de21cdad04f28585e01d24b823427fc9ad4", kill_on_drop: false }`
[INFO] [stderr]     Checking interpreter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Lexer` is never constructed
[INFO] [stdout]  --> src/lexer.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Lexer<'a> {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Lexer` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]    --> src/lexer.rs:12:12
[INFO] [stdout]     |
[INFO] [stdout] 11  | impl<'a> Lexer<'a> {
[INFO] [stdout]     | ------------------ associated items in this implementation
[INFO] [stdout] 12  |     pub fn new(input: &'a String) -> Self {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 24  |     pub fn next_token(&mut self) -> Token {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 89  |     fn read_char(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 100 |     fn peek_char(&self) -> Option<u8> {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |     fn read_number(&mut self) -> &[u8] {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 117 |     fn read_identifier(&mut self) -> &[u8] {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 126 |     fn skip_whitespace(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_digit` is never used
[INFO] [stdout]    --> src/lexer.rs:133:4
[INFO] [stdout]     |
[INFO] [stdout] 133 | fn is_digit(ch: u8) -> bool {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_letter` is never used
[INFO] [stdout]    --> src/lexer.rs:137:4
[INFO] [stdout]     |
[INFO] [stdout] 137 | fn is_letter(ch: u8) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_whitespace` is never used
[INFO] [stdout]    --> src/lexer.rs:141:4
[INFO] [stdout]     |
[INFO] [stdout] 141 | fn is_whitespace(ch: u8) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Token` is never constructed
[INFO] [stdout]  --> src/token.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Token {
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/token.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Token {
[INFO] [stdout]   | ---------- associated function in this implementation
[INFO] [stdout] 6 |     pub fn new(token_type: TokenType) -> Self {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple variants are never constructed
[INFO] [stdout]   --> src/token.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub enum TokenType {
[INFO] [stdout]    |          --------- variants in this enum
[INFO] [stdout] 15 |     Illegal,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 16 |     EOF,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     Ident(String),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 20 |     Int(String),
[INFO] [stdout]    |     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     Assign,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 24 |     Plus,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 25 |     Minus,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 26 |     Bang,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 27 |     Asterisk,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 28 |     Slash,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 29 |     LT,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 30 |     GT,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 31 |     Equals,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 32 |     NotEquals,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     Comma,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 36 |     SemiColon,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 37 |
[INFO] [stdout] 38 |     LParen,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 39 |     RParen,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 40 |     LBrace,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 41 |     RBrace,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 44 |     Function,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 45 |     Let,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 46 |     True,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 47 |     False,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 48 |     If,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 49 |     Else,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 50 |     Return,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TokenType` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "1d2fa49a66d899be9ae8aa476e008de21cdad04f28585e01d24b823427fc9ad4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d2fa49a66d899be9ae8aa476e008de21cdad04f28585e01d24b823427fc9ad4", kill_on_drop: false }`
[INFO] [stdout] 1d2fa49a66d899be9ae8aa476e008de21cdad04f28585e01d24b823427fc9ad4