[INFO] cloning repository https://github.com/kazukousen/rust-monkey
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kazukousen/rust-monkey" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazukousen%2Frust-monkey", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazukousen%2Frust-monkey'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0f5731a6606fc4c0273954dee20d94a967cbb132
[INFO] checking kazukousen/rust-monkey against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazukousen%2Frust-monkey" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kazukousen/rust-monkey on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kazukousen/rust-monkey
[INFO] finished tweaking git repo https://github.com/kazukousen/rust-monkey
[INFO] tweaked toml for git repo https://github.com/kazukousen/rust-monkey written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/kazukousen/rust-monkey already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b5b4c004924e510912e69447d1e449e01c170951c66bf96af0ca4dc3ec99573e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b5b4c004924e510912e69447d1e449e01c170951c66bf96af0ca4dc3ec99573e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5b4c004924e510912e69447d1e449e01c170951c66bf96af0ca4dc3ec99573e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5b4c004924e510912e69447d1e449e01c170951c66bf96af0ca4dc3ec99573e", kill_on_drop: false }`
[INFO] [stdout] b5b4c004924e510912e69447d1e449e01c170951c66bf96af0ca4dc3ec99573e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f32c2f0a696dbf5b915508e5682f094bb7e0e4dcd31c7f931cc855a4d9a0855
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0f32c2f0a696dbf5b915508e5682f094bb7e0e4dcd31c7f931cc855a4d9a0855", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-monkey v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `prompt`
[INFO] [stdout]  --> src/repl.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let prompt = ">> ";
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_prompt`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `prompt`
[INFO] [stdout]  --> src/repl.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let prompt = ">> ";
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_prompt`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_letter`
[INFO] [stdout]  --> src/utils.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub fn is_letter(s: &String) -> bool {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_digit`
[INFO] [stdout]  --> src/utils.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn is_digit(s: &String) -> bool {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ILLEGAL`
[INFO] [stdout]  --> src/lexer/token.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     ILLEGAL,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `EOF`
[INFO] [stdout]  --> src/lexer/token.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     EOF,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `IDENT`
[INFO] [stdout]  --> src/lexer/token.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     IDENT(String),
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `INT`
[INFO] [stdout]  --> src/lexer/token.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     INT(String),
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `STRING`
[INFO] [stdout]  --> src/lexer/token.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     STRING(String),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ASSIGN`
[INFO] [stdout]   --> src/lexer/token.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     ASSIGN,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `PLUS`
[INFO] [stdout]   --> src/lexer/token.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     PLUS,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `MINUS`
[INFO] [stdout]   --> src/lexer/token.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     MINUS,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `MULTIPLY`
[INFO] [stdout]   --> src/lexer/token.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     MULTIPLY,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `DIVIDE`
[INFO] [stdout]   --> src/lexer/token.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     DIVIDE,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LT`
[INFO] [stdout]   --> src/lexer/token.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 |     LT,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `GT`
[INFO] [stdout]   --> src/lexer/token.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     GT,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BANG`
[INFO] [stdout]   --> src/lexer/token.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     BANG,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `COMMA`
[INFO] [stdout]   --> src/lexer/token.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     COMMA,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `COLON`
[INFO] [stdout]   --> src/lexer/token.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     COLON,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `SEMICOLON`
[INFO] [stdout]   --> src/lexer/token.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     SEMICOLON,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LPAREN`
[INFO] [stdout]   --> src/lexer/token.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     LPAREN,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RPAREN`
[INFO] [stdout]   --> src/lexer/token.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     RPAREN,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LBRACE`
[INFO] [stdout]   --> src/lexer/token.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     LBRACE,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RBRACE`
[INFO] [stdout]   --> src/lexer/token.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     RBRACE,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LBRACKET`
[INFO] [stdout]   --> src/lexer/token.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     LBRACKET,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RBRACKET`
[INFO] [stdout]   --> src/lexer/token.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     RBRACKET,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FUNCTION`
[INFO] [stdout]   --> src/lexer/token.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     FUNCTION,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LET`
[INFO] [stdout]   --> src/lexer/token.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     LET,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `TRUE`
[INFO] [stdout]   --> src/lexer/token.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     TRUE,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FALSE`
[INFO] [stdout]   --> src/lexer/token.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     FALSE,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `IF`
[INFO] [stdout]   --> src/lexer/token.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     IF,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ELSE`
[INFO] [stdout]   --> src/lexer/token.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     ELSE,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RETURN`
[INFO] [stdout]   --> src/lexer/token.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     RETURN,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `EQ`
[INFO] [stdout]   --> src/lexer/token.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     EQ,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NOTEQ`
[INFO] [stdout]   --> src/lexer/token.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     NOTEQ,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_string`
[INFO] [stdout]   --> src/lexer/token.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn from_string(s: &String) -> TokenType {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lexer/token.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |     pub fn new(s: String, is_string: bool, line_num: u8, column_num: u8) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_string`
[INFO] [stdout]   --> src/lexer/token.rs:95:8
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn new_string(s: String, line_num: u8, column_num: u8) -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `EMPTY_STR`
[INFO] [stdout]   --> src/lexer/lexer.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub static EMPTY_STR: &'static str = "";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/lexer/lexer.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new(input: String) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_char`
[INFO] [stdout]   --> src/lexer/lexer.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn read_char(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_char`
[INFO] [stdout]   --> src/lexer/lexer.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn get_char(&self, pos: i32) -> String {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_char`
[INFO] [stdout]   --> src/lexer/lexer.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn peek_char(&self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_token`
[INFO] [stdout]   --> src/lexer/lexer.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn next_token(&mut self) -> token::Token {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_string`
[INFO] [stdout]   --> src/lexer/lexer.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn read_string(&mut self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_identifier`
[INFO] [stdout]   --> src/lexer/lexer.rs:94:8
[INFO] [stdout]    |
[INFO] [stdout] 94 |     fn read_identifier(&mut self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_digit`
[INFO] [stdout]    --> src/lexer/lexer.rs:105:8
[INFO] [stdout]     |
[INFO] [stdout] 105 |     fn read_digit(&mut self) -> String {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `skip_whitespace`
[INFO] [stdout]    --> src/lexer/lexer.rs:117:8
[INFO] [stdout]     |
[INFO] [stdout] 117 |     fn skip_whitespace(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 47 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "0f32c2f0a696dbf5b915508e5682f094bb7e0e4dcd31c7f931cc855a4d9a0855", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f32c2f0a696dbf5b915508e5682f094bb7e0e4dcd31c7f931cc855a4d9a0855", kill_on_drop: false }`
[INFO] [stdout] 0f32c2f0a696dbf5b915508e5682f094bb7e0e4dcd31c7f931cc855a4d9a0855