[INFO] cloning repository https://github.com/ogata-k/monkey-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ogata-k/monkey-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fogata-k%2Fmonkey-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fogata-k%2Fmonkey-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d0e520c65e14d0736d14200f0b460dea85e8c67b
[INFO] testing ogata-k/monkey-rs against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fogata-k%2Fmonkey-rs" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ogata-k/monkey-rs on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ogata-k/monkey-rs
[INFO] finished tweaking git repo https://github.com/ogata-k/monkey-rs
[INFO] tweaked toml for git repo https://github.com/ogata-k/monkey-rs written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/ogata-k/monkey-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] efe11987ff01ab7d503d5ffeb5a3db1c300a7c0c8eaccbcb8ce25b9a373da648
[INFO] running `Command { std: "docker" "start" "-a" "efe11987ff01ab7d503d5ffeb5a3db1c300a7c0c8eaccbcb8ce25b9a373da648", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "efe11987ff01ab7d503d5ffeb5a3db1c300a7c0c8eaccbcb8ce25b9a373da648", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efe11987ff01ab7d503d5ffeb5a3db1c300a7c0c8eaccbcb8ce25b9a373da648", kill_on_drop: false }`
[INFO] [stdout] efe11987ff01ab7d503d5ffeb5a3db1c300a7c0c8eaccbcb8ce25b9a373da648
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5f290b992c5e532ad443b2563aef7ac9cf7ba4f0d0d58a32601a19d06048e4bb
[INFO] running `Command { std: "docker" "start" "-a" "5f290b992c5e532ad443b2563aef7ac9cf7ba4f0d0d58a32601a19d06048e4bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling monkey-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/parser.rs:260:9
[INFO] [stdout]     |
[INFO] [stdout] 260 |         ;
[INFO] [stdout]     |         ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable while-let pattern
[INFO] [stdout]   --> src/repl.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 | /         while let tok = lexer.next_token() {
[INFO] [stdout] 36 | |             if tok.token_type_is(TokenType::EOF) {
[INFO] [stdout] 37 | |                 break;
[INFO] [stdout] 38 | |             }
[INFO] [stdout] ...  |
[INFO] [stdout] 43 | |             write!(w, "{:?}\n", tok).unwrap();
[INFO] [stdout] 44 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tok` is never read
[INFO] [stdout]    --> src/lexer.rs:109:13
[INFO] [stdout]     |
[INFO] [stdout] 109 |         let mut tok: Option<Token> = None;
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/evaluator.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut result = Object::NULL;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stmt`
[INFO] [stdout]   --> src/evaluator.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 | /             stmt @ Statement::LetStatement {
[INFO] [stdout] 35 | |                 token: _,
[INFO] [stdout] 36 | |                 name: _,
[INFO] [stdout] 37 | |                 value: _,
[INFO] [stdout] 38 | |             } => unimplemented!(),
[INFO] [stdout]    | |_____________^ help: if this is intentional, prefix it with an underscore: `_stmt`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/evaluator.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |         let mut result = Object::NULL;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/evaluator.rs:85:13
[INFO] [stdout]    |
[INFO] [stdout] 85 |         let mut result = Object::NULL;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_token_is_prefix`
[INFO] [stdout]   --> src/parser.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn peek_token_is_prefix(&self) -> 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: `peek_prefix_precedence`
[INFO] [stdout]    --> src/parser.rs:125:8
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn peek_prefix_precedence(&self) -> Opt {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.50s
[INFO] running `Command { std: "docker" "inspect" "5f290b992c5e532ad443b2563aef7ac9cf7ba4f0d0d58a32601a19d06048e4bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f290b992c5e532ad443b2563aef7ac9cf7ba4f0d0d58a32601a19d06048e4bb", kill_on_drop: false }`
[INFO] [stdout] 5f290b992c5e532ad443b2563aef7ac9cf7ba4f0d0d58a32601a19d06048e4bb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 32cdbaf58510acfb1fb3bae4f91fc4bcd5846a0741951ffb6050e08b1557f988
[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" "32cdbaf58510acfb1fb3bae4f91fc4bcd5846a0741951ffb6050e08b1557f988", kill_on_drop: false }`
[INFO] [stderr]    Compiling monkey-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/parser.rs:260:9
[INFO] [stdout]     |
[INFO] [stdout] 260 |         ;
[INFO] [stdout]     |         ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable while-let pattern
[INFO] [stdout]   --> src/repl.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 | /         while let tok = lexer.next_token() {
[INFO] [stdout] 36 | |             if tok.token_type_is(TokenType::EOF) {
[INFO] [stdout] 37 | |                 break;
[INFO] [stdout] 38 | |             }
[INFO] [stdout] ...  |
[INFO] [stdout] 43 | |             write!(w, "{:?}\n", tok).unwrap();
[INFO] [stdout] 44 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tok` is never read
[INFO] [stdout]    --> src/lexer.rs:109:13
[INFO] [stdout]     |
[INFO] [stdout] 109 |         let mut tok: Option<Token> = None;
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/evaluator.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut result = Object::NULL;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stmt`
[INFO] [stdout]   --> src/evaluator.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 | /             stmt @ Statement::LetStatement {
[INFO] [stdout] 35 | |                 token: _,
[INFO] [stdout] 36 | |                 name: _,
[INFO] [stdout] 37 | |                 value: _,
[INFO] [stdout] 38 | |             } => unimplemented!(),
[INFO] [stdout]    | |_____________^ help: if this is intentional, prefix it with an underscore: `_stmt`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/evaluator.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |         let mut result = Object::NULL;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/evaluator.rs:85:13
[INFO] [stdout]    |
[INFO] [stdout] 85 |         let mut result = Object::NULL;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `peek_token_is_prefix`
[INFO] [stdout]   --> src/parser.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn peek_token_is_prefix(&self) -> 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: `peek_prefix_precedence`
[INFO] [stdout]    --> src/parser.rs:125:8
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn peek_prefix_precedence(&self) -> Opt {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/parser.rs:260:9
[INFO] [stdout]     |
[INFO] [stdout] 260 |         ;
[INFO] [stdout]     |         ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: irrefutable while-let pattern
[INFO] [stdout]   --> src/repl.rs:35:9
[INFO] [stdout]    |
[INFO] [stdout] 35 | /         while let tok = lexer.next_token() {
[INFO] [stdout] 36 | |             if tok.token_type_is(TokenType::EOF) {
[INFO] [stdout] 37 | |                 break;
[INFO] [stdout] 38 | |             }
[INFO] [stdout] ...  |
[INFO] [stdout] 43 | |             write!(w, "{:?}\n", tok).unwrap();
[INFO] [stdout] 44 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `tok` is never read
[INFO] [stdout]    --> src/lexer.rs:109:13
[INFO] [stdout]     |
[INFO] [stdout] 109 |         let mut tok: Option<Token> = None;
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/evaluator.rs:25:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let mut result = Object::NULL;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stmt`
[INFO] [stdout]   --> src/evaluator.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 | /             stmt @ Statement::LetStatement {
[INFO] [stdout] 35 | |                 token: _,
[INFO] [stdout] 36 | |                 name: _,
[INFO] [stdout] 37 | |                 value: _,
[INFO] [stdout] 38 | |             } => unimplemented!(),
[INFO] [stdout]    | |_____________^ help: if this is intentional, prefix it with an underscore: `_stmt`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/evaluator.rs:56:13
[INFO] [stdout]    |
[INFO] [stdout] 56 |         let mut result = Object::NULL;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/evaluator.rs:85:13
[INFO] [stdout]    |
[INFO] [stdout] 85 |         let mut result = Object::NULL;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/evaluator.rs:334:13
[INFO] [stdout]     |
[INFO] [stdout] 334 |         let mut lexer = Lexer::new(input);
[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: associated function is never used: `peek_token_is_prefix`
[INFO] [stdout]   --> src/parser.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn peek_token_is_prefix(&self) -> 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: `peek_prefix_precedence`
[INFO] [stdout]    --> src/parser.rs:125:8
[INFO] [stdout]     |
[INFO] [stdout] 125 |     fn peek_prefix_precedence(&self) -> Opt {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]     --> src/parser.rs:1349:38
[INFO] [stdout]      |
[INFO] [stdout] 1349 |         for (input, expect) in tests.into_iter() {
[INFO] [stdout]      |                                      ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]      = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]      = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.23s
[INFO] running `Command { std: "docker" "inspect" "32cdbaf58510acfb1fb3bae4f91fc4bcd5846a0741951ffb6050e08b1557f988", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32cdbaf58510acfb1fb3bae4f91fc4bcd5846a0741951ffb6050e08b1557f988", kill_on_drop: false }`
[INFO] [stdout] 32cdbaf58510acfb1fb3bae4f91fc4bcd5846a0741951ffb6050e08b1557f988
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9f72992777e17ae1c15d81030bf66d98f1ccbb2bb1e8ba63ad61283d9d970f23
[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" "9f72992777e17ae1c15d81030bf66d98f1ccbb2bb1e8ba63ad61283d9d970f23", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/parser.rs:260:9
[INFO] [stderr]     |
[INFO] [stderr] 260 |         ;
[INFO] [stderr]     |         ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: irrefutable while-let pattern
[INFO] [stderr]   --> src/repl.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 | /         while let tok = lexer.next_token() {
[INFO] [stderr] 36 | |             if tok.token_type_is(TokenType::EOF) {
[INFO] [stderr] 37 | |                 break;
[INFO] [stderr] 38 | |             }
[INFO] [stderr] ...  |
[INFO] [stderr] 43 | |             write!(w, "{:?}\n", tok).unwrap();
[INFO] [stderr] 44 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tok` is never read
[INFO] [stderr]    --> src/lexer.rs:109:13
[INFO] [stderr]     |
[INFO] [stderr] 109 |         let mut tok: Option<Token> = None;
[INFO] [stderr]     |             ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/evaluator.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let mut result = Object::NULL;
[INFO] [stderr]    |             ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stmt`
[INFO] [stderr]   --> src/evaluator.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 | /             stmt @ Statement::LetStatement {
[INFO] [stderr] 35 | |                 token: _,
[INFO] [stderr] 36 | |                 name: _,
[INFO] [stderr] 37 | |                 value: _,
[INFO] [stderr] 38 | |             } => unimplemented!(),
[INFO] [stderr]    | |_____________^ help: if this is intentional, prefix it with an underscore: `_stmt`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/evaluator.rs:56:13
[INFO] [stderr]    |
[INFO] [stderr] 56 |         let mut result = Object::NULL;
[INFO] [stderr]    |             ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/evaluator.rs:85:13
[INFO] [stderr]    |
[INFO] [stderr] 85 |         let mut result = Object::NULL;
[INFO] [stderr]    |             ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/evaluator.rs:334:13
[INFO] [stderr]     |
[INFO] [stderr] 334 |         let mut lexer = Lexer::new(input);
[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: associated function is never used: `peek_token_is_prefix`
[INFO] [stderr]   --> src/parser.rs:98:8
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn peek_token_is_prefix(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `peek_prefix_precedence`
[INFO] [stderr]    --> src/parser.rs:125:8
[INFO] [stderr]     |
[INFO] [stderr] 125 |     fn peek_prefix_precedence(&self) -> Opt {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]     --> src/parser.rs:1349:38
[INFO] [stderr]      |
[INFO] [stderr] 1349 |         for (input, expect) in tests.into_iter() {
[INFO] [stderr]      |                                      ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(array_into_iter)]` on by default
[INFO] [stderr]      = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]      = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: 11 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/parser.rs:260:9
[INFO] [stderr]     |
[INFO] [stderr] 260 |         ;
[INFO] [stderr]     |         ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: irrefutable while-let pattern
[INFO] [stderr]   --> src/repl.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 | /         while let tok = lexer.next_token() {
[INFO] [stderr] 36 | |             if tok.token_type_is(TokenType::EOF) {
[INFO] [stderr] 37 | |                 break;
[INFO] [stderr] 38 | |             }
[INFO] [stderr] ...  |
[INFO] [stderr] 43 | |             write!(w, "{:?}\n", tok).unwrap();
[INFO] [stderr] 44 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `tok` is never read
[INFO] [stderr]    --> src/lexer.rs:109:13
[INFO] [stderr]     |
[INFO] [stderr] 109 |         let mut tok: Option<Token> = None;
[INFO] [stderr]     |             ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/evaluator.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let mut result = Object::NULL;
[INFO] [stderr]    |             ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `stmt`
[INFO] [stderr]   --> src/evaluator.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 | /             stmt @ Statement::LetStatement {
[INFO] [stderr] 35 | |                 token: _,
[INFO] [stderr] 36 | |                 name: _,
[INFO] [stderr] 37 | |                 value: _,
[INFO] [stderr] 38 | |             } => unimplemented!(),
[INFO] [stderr]    | |_____________^ help: if this is intentional, prefix it with an underscore: `_stmt`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/evaluator.rs:56:13
[INFO] [stderr]    |
[INFO] [stderr] 56 |         let mut result = Object::NULL;
[INFO] [stderr]    |             ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `result` is never read
[INFO] [stderr]   --> src/evaluator.rs:85:13
[INFO] [stderr]    |
[INFO] [stderr] 85 |         let mut result = Object::NULL;
[INFO] [stderr]    |             ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `peek_token_is_prefix`
[INFO] [stderr]   --> src/parser.rs:98:8
[INFO] [stderr]    |
[INFO] [stderr] 98 |     fn peek_token_is_prefix(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `peek_prefix_precedence`
[INFO] [stderr]    --> src/parser.rs:125:8
[INFO] [stderr]     |
[INFO] [stderr] 125 |     fn peek_prefix_precedence(&self) -> Opt {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/monkey_rs-a1d91d9af1e37d38
[INFO] [stdout] 
[INFO] [stdout] running 20 tests
[INFO] [stdout] test parser::test::test_identifier_expression ... ok
[INFO] [stdout] test evaluator::test::test_bang_operator ... ok
[INFO] [stdout] test evaluator::test::test_eval_boolean_expression ... ok
[INFO] [stdout] test parser::test::test_function_literal ... ok
[INFO] [stdout] test evaluator::test::test_eval_integer_expression ... ok
[INFO] [stdout] test parser::test::test_call_expression ... ok
[INFO] [stdout] test evaluator::test::test_if_expressions ... ok
[INFO] [stdout] test parser::test::test_prefix_expressions ... ok
[INFO] [stdout] test parser::test::test_return_statements ... ok
[INFO] [stdout] test ast::test::test_to_string ... ok
[INFO] [stdout] test evaluator::test::test_eval_return_statements ... ok
[INFO] [stdout] test parser::test::test_boolean_literal_expression ... ok
[INFO] [stdout] test parser::test::test_operator_precedences ... ok
[INFO] [stdout] test parser::test::test_infix_expressions ... ok
[INFO] [stdout] test parser::test::test_integer_literal_expression ... ok
[INFO] [stdout] test parser::test::test_if_else_expression ... ok
[INFO] [stdout] test parser::test::test_if_expression ... ok
[INFO] [stdout] test parser::test::test_let_statements ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/monkey_rs-0ee6480bc70c29e0
[INFO] [stdout] test token::test::test_next_token ... ok
[INFO] [stdout] test token::test::test_no_line ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 20 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests monkey-rs
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9f72992777e17ae1c15d81030bf66d98f1ccbb2bb1e8ba63ad61283d9d970f23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f72992777e17ae1c15d81030bf66d98f1ccbb2bb1e8ba63ad61283d9d970f23", kill_on_drop: false }`
[INFO] [stdout] 9f72992777e17ae1c15d81030bf66d98f1ccbb2bb1e8ba63ad61283d9d970f23