[INFO] updating cached repository EmmaLa/MonkeyInterpreter
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/EmmaLa/MonkeyInterpreter
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/EmmaLa/MonkeyInterpreter" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/EmmaLa/MonkeyInterpreter"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/EmmaLa/MonkeyInterpreter'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/EmmaLa/MonkeyInterpreter" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/EmmaLa/MonkeyInterpreter"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/EmmaLa/MonkeyInterpreter'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 538fab97895b45c362be501f897eecf95811dcf0
[INFO] sha for GitHub repo EmmaLa/MonkeyInterpreter: 538fab97895b45c362be501f897eecf95811dcf0
[INFO] validating manifest of EmmaLa/MonkeyInterpreter on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of EmmaLa/MonkeyInterpreter on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing EmmaLa/MonkeyInterpreter
[INFO] finished frobbing EmmaLa/MonkeyInterpreter
[INFO] frobbed toml for EmmaLa/MonkeyInterpreter written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/EmmaLa/MonkeyInterpreter/Cargo.toml
[INFO] started frobbing EmmaLa/MonkeyInterpreter
[INFO] finished frobbing EmmaLa/MonkeyInterpreter
[INFO] frobbed toml for EmmaLa/MonkeyInterpreter written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/EmmaLa/MonkeyInterpreter/Cargo.toml
[INFO] crate EmmaLa/MonkeyInterpreter already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking EmmaLa/MonkeyInterpreter against try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-4/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/EmmaLa/MonkeyInterpreter:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1e09d652d2be0d352354890aeecde78fbb0eb0f954cdd8ee6a74d2e784d61514
[INFO] running `"docker" "start" "-a" "1e09d652d2be0d352354890aeecde78fbb0eb0f954cdd8ee6a74d2e784d61514"`
[INFO] [stderr]     Checking monkey_int v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `ast::Statement::*`
[INFO] [stderr]    --> src/parser/mod.rs:155:7
[INFO] [stderr]     |
[INFO] [stderr] 155 |         use ast::Statement::*;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `repl::Repl`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use repl::Repl;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Read`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::io::Read;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::Peekable`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::iter::Peekable;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `lexer::token::Token::*`
[INFO] [stderr]   --> src/main.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use lexer::token::Token::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ast::Statement::*`
[INFO] [stderr]    --> src/parser/mod.rs:155:7
[INFO] [stderr]     |
[INFO] [stderr] 155 |         use ast::Statement::*;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `repl::Repl`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use repl::Repl;
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use std::fs::File;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Read`
[INFO] [stderr]  --> src/main.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::io::Read;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::iter::Peekable`
[INFO] [stderr]   --> src/main.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::iter::Peekable;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `lexer::token::Token::*`
[INFO] [stderr]   --> src/main.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use lexer::token::Token::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/repl/mod.rs:26:10
[INFO] [stderr]    |
[INFO] [stderr] 26 |             Ok(n) => buffer,
[INFO] [stderr]    |                ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `error`
[INFO] [stderr]   --> src/repl/mod.rs:27:11
[INFO] [stderr]    |
[INFO] [stderr] 27 |             Err(error) => {
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_error`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let mut content = String::from("-4+2;");
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_equal_sign`
[INFO] [stderr]   --> src/lexer/reader.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn is_equal_sign(character: &char) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_identifier`
[INFO] [stderr]   --> src/lexer/reader.rs:69:2
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn read_identifier(&mut self, character: char) -> Option<Token> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_letter`
[INFO] [stderr]   --> src/lexer/mod.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn is_letter(character: &char) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Repl`
[INFO] [stderr]  --> src/repl/mod.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Repl;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]  --> src/repl/mod.rs:9:2
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn run(){
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_user_input`
[INFO] [stderr]   --> src/repl/mod.rs:23:2
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn read_user_input(&mut self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Expression`
[INFO] [stderr]   --> src/ast/mod.rs:51:2
[INFO] [stderr]    |
[INFO] [stderr] 51 |       Expression {
[INFO] [stderr]    |  _____^
[INFO] [stderr] 52 | |         token: Token,
[INFO] [stderr] 53 | |         value: Box<Statement>
[INFO] [stderr] 54 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Call`
[INFO] [stderr]   --> src/parser/mod.rs:15:2
[INFO] [stderr]    |
[INFO] [stderr] 15 |     Call = 7
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_token_is_int`
[INFO] [stderr]    --> src/parser/mod.rs:236:2
[INFO] [stderr]     |
[INFO] [stderr] 236 |     fn next_token_is_int(&mut self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `PROMPT` should have a snake case name
[INFO] [stderr]   --> src/repl/mod.rs:11:7
[INFO] [stderr]    |
[INFO] [stderr] 11 |         let PROMPT = ">> ";
[INFO] [stderr]    |             ^^^^^^ help: convert the identifier to snake case: `prompt`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/repl/mod.rs:14:4
[INFO] [stderr]    |
[INFO] [stderr] 14 |             io::stdout().flush();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]   --> src/repl/mod.rs:26:10
[INFO] [stderr]    |
[INFO] [stderr] 26 |             Ok(n) => buffer,
[INFO] [stderr]    |                ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `error`
[INFO] [stderr]   --> src/repl/mod.rs:27:11
[INFO] [stderr]    |
[INFO] [stderr] 27 |             Err(error) => {
[INFO] [stderr]    |                 ^^^^^ help: consider prefixing with an underscore: `_error`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let mut content = String::from("-4+2;");
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_equal_sign`
[INFO] [stderr]   --> src/lexer/reader.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn is_equal_sign(character: &char) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_identifier`
[INFO] [stderr]   --> src/lexer/reader.rs:69:2
[INFO] [stderr]    |
[INFO] [stderr] 69 |     pub fn read_identifier(&mut self, character: char) -> Option<Token> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_letter`
[INFO] [stderr]   --> src/lexer/mod.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn is_letter(character: &char) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Repl`
[INFO] [stderr]  --> src/repl/mod.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub struct Repl;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]  --> src/repl/mod.rs:9:2
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn run(){
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `read_user_input`
[INFO] [stderr]   --> src/repl/mod.rs:23:2
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn read_user_input(&mut self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Expression`
[INFO] [stderr]   --> src/ast/mod.rs:51:2
[INFO] [stderr]    |
[INFO] [stderr] 51 |       Expression {
[INFO] [stderr]    |  _____^
[INFO] [stderr] 52 | |         token: Token,
[INFO] [stderr] 53 | |         value: Box<Statement>
[INFO] [stderr] 54 | |     },
[INFO] [stderr]    | |_____^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Call`
[INFO] [stderr]   --> src/parser/mod.rs:15:2
[INFO] [stderr]    |
[INFO] [stderr] 15 |     Call = 7
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `next_token_is_int`
[INFO] [stderr]    --> src/parser/mod.rs:236:2
[INFO] [stderr]     |
[INFO] [stderr] 236 |     fn next_token_is_int(&mut self) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `PROMPT` should have a snake case name
[INFO] [stderr]   --> src/repl/mod.rs:11:7
[INFO] [stderr]    |
[INFO] [stderr] 11 |         let PROMPT = ">> ";
[INFO] [stderr]    |             ^^^^^^ help: convert the identifier to snake case: `prompt`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/repl/mod.rs:14:4
[INFO] [stderr]    |
[INFO] [stderr] 14 |             io::stdout().flush();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `"docker" "inspect" "1e09d652d2be0d352354890aeecde78fbb0eb0f954cdd8ee6a74d2e784d61514"`
[INFO] running `"docker" "rm" "-f" "1e09d652d2be0d352354890aeecde78fbb0eb0f954cdd8ee6a74d2e784d61514"`
[INFO] [stdout] 1e09d652d2be0d352354890aeecde78fbb0eb0f954cdd8ee6a74d2e784d61514