[INFO] cloning repository https://github.com/EmmaLa/MonkeyInterpreter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/EmmaLa/MonkeyInterpreter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEmmaLa%2FMonkeyInterpreter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEmmaLa%2FMonkeyInterpreter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 538fab97895b45c362be501f897eecf95811dcf0
[INFO] checking EmmaLa/MonkeyInterpreter against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEmmaLa%2FMonkeyInterpreter" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/EmmaLa/MonkeyInterpreter on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/EmmaLa/MonkeyInterpreter
[INFO] finished tweaking git repo https://github.com/EmmaLa/MonkeyInterpreter
[INFO] tweaked toml for git repo https://github.com/EmmaLa/MonkeyInterpreter written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/EmmaLa/MonkeyInterpreter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd8d3d6419337c8cb48e4889a90bbab0f3332b84d6237042c8791ba6602f6007
[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" "fd8d3d6419337c8cb48e4889a90bbab0f3332b84d6237042c8791ba6602f6007", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd8d3d6419337c8cb48e4889a90bbab0f3332b84d6237042c8791ba6602f6007", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd8d3d6419337c8cb48e4889a90bbab0f3332b84d6237042c8791ba6602f6007", kill_on_drop: false }`
[INFO] [stdout] fd8d3d6419337c8cb48e4889a90bbab0f3332b84d6237042c8791ba6602f6007
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39a1536be837bea36f506556d31ad2eed2cef8a36b978ab5f0e8e8033e440b22
[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" "39a1536be837bea36f506556d31ad2eed2cef8a36b978ab5f0e8e8033e440b22", kill_on_drop: false }`
[INFO] [stderr]     Checking monkey_int v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ast::Statement::*`
[INFO] [stdout]    --> src/parser/mod.rs:155:7
[INFO] [stdout]     |
[INFO] [stdout] 155 |         use ast::Statement::*;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `repl::Repl`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use repl::Repl;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::Peekable`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::iter::Peekable;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lexer::token::Token::*`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use lexer::token::Token::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ast::Statement::*`
[INFO] [stdout]    --> src/parser/mod.rs:155:7
[INFO] [stdout]     |
[INFO] [stdout] 155 |         use ast::Statement::*;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `repl::Repl`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use repl::Repl;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::iter::Peekable`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::iter::Peekable;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lexer::token::Token::*`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use lexer::token::Token::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/repl/mod.rs:26:10
[INFO] [stdout]    |
[INFO] [stdout] 26 |             Ok(n) => buffer,
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `error`
[INFO] [stdout]   --> src/repl/mod.rs:27:11
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Err(error) => {
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let mut content = String::from("-4+2;");
[INFO] [stdout]    |         ----^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_equal_sign`
[INFO] [stdout]   --> src/lexer/reader.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn is_equal_sign(character: &char) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_identifier`
[INFO] [stdout]   --> src/lexer/reader.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn read_identifier(&mut self, character: char) -> Option<Token> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_letter`
[INFO] [stdout]   --> src/lexer/mod.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn is_letter(character: &char) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]  --> src/repl/mod.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn run(){
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_user_input`
[INFO] [stdout]   --> src/repl/mod.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn read_user_input(&mut self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Expression`
[INFO] [stdout]   --> src/ast/mod.rs:51:2
[INFO] [stdout]    |
[INFO] [stdout] 51 |       Expression {
[INFO] [stdout]    |  _____^
[INFO] [stdout] 52 | |         token: Token,
[INFO] [stdout] 53 | |         value: Box<Statement>
[INFO] [stdout] 54 | |     },
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Call`
[INFO] [stdout]   --> src/parser/mod.rs:15:2
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Call = 7
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_token_is_int`
[INFO] [stdout]    --> src/parser/mod.rs:236:5
[INFO] [stdout]     |
[INFO] [stdout] 236 |     fn next_token_is_int(&mut self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/repl/mod.rs:26:10
[INFO] [stdout]    |
[INFO] [stdout] 26 |             Ok(n) => buffer,
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `error`
[INFO] [stdout]   --> src/repl/mod.rs:27:11
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Err(error) => {
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `PROMPT` should have a snake case name
[INFO] [stdout]   --> src/repl/mod.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let PROMPT = ">> ";
[INFO] [stdout]    |             ^^^^^^ help: convert the identifier to snake case: `prompt`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let mut content = String::from("-4+2;");
[INFO] [stdout]    |         ----^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repl/mod.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 |             io::stdout().flush();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_equal_sign`
[INFO] [stdout]   --> src/lexer/reader.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn is_equal_sign(character: &char) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_identifier`
[INFO] [stdout]   --> src/lexer/reader.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     pub fn read_identifier(&mut self, character: char) -> Option<Token> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_letter`
[INFO] [stdout]   --> src/lexer/mod.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn is_letter(character: &char) -> bool {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]  --> src/repl/mod.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     pub fn run(){
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `read_user_input`
[INFO] [stdout]   --> src/repl/mod.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn read_user_input(&mut self) -> String {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Expression`
[INFO] [stdout]   --> src/ast/mod.rs:51:2
[INFO] [stdout]    |
[INFO] [stdout] 51 |       Expression {
[INFO] [stdout]    |  _____^
[INFO] [stdout] 52 | |         token: Token,
[INFO] [stdout] 53 | |         value: Box<Statement>
[INFO] [stdout] 54 | |     },
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Call`
[INFO] [stdout]   --> src/parser/mod.rs:15:2
[INFO] [stdout]    |
[INFO] [stdout] 15 |     Call = 7
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `next_token_is_int`
[INFO] [stdout]    --> src/parser/mod.rs:236:5
[INFO] [stdout]     |
[INFO] [stdout] 236 |     fn next_token_is_int(&mut self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `PROMPT` should have a snake case name
[INFO] [stdout]   --> src/repl/mod.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 |         let PROMPT = ">> ";
[INFO] [stdout]    |             ^^^^^^ help: convert the identifier to snake case: `prompt`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/repl/mod.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 |             io::stdout().flush();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "39a1536be837bea36f506556d31ad2eed2cef8a36b978ab5f0e8e8033e440b22", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39a1536be837bea36f506556d31ad2eed2cef8a36b978ab5f0e8e8033e440b22", kill_on_drop: false }`
[INFO] [stdout] 39a1536be837bea36f506556d31ad2eed2cef8a36b978ab5f0e8e8033e440b22