[INFO] cloning repository https://github.com/bradford-hamilton/monkey-lang-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bradford-hamilton/monkey-lang-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbradford-hamilton%2Fmonkey-lang-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbradford-hamilton%2Fmonkey-lang-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9baab902d4f0d377b40c71d31fd1cd99d3b9baef
[INFO] checking bradford-hamilton/monkey-lang-rs/9baab902d4f0d377b40c71d31fd1cd99d3b9baef against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbradford-hamilton%2Fmonkey-lang-rs" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bradford-hamilton/monkey-lang-rs on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bradford-hamilton/monkey-lang-rs
[INFO] finished tweaking git repo https://github.com/bradford-hamilton/monkey-lang-rs
[INFO] tweaked toml for git repo https://github.com/bradford-hamilton/monkey-lang-rs written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/bradford-hamilton/monkey-lang-rs 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b8e061b19e59be41797bff9ebd0331b01f7a920649f1369f88fa004a0c6cb8e
[INFO] running `Command { std: "docker" "start" "-a" "4b8e061b19e59be41797bff9ebd0331b01f7a920649f1369f88fa004a0c6cb8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b8e061b19e59be41797bff9ebd0331b01f7a920649f1369f88fa004a0c6cb8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b8e061b19e59be41797bff9ebd0331b01f7a920649f1369f88fa004a0c6cb8e", kill_on_drop: false }`
[INFO] [stdout] 4b8e061b19e59be41797bff9ebd0331b01f7a920649f1369f88fa004a0c6cb8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 18bb5c549d931f4a6b505108f1e7faaa2bd80eb410cdaf5981cfb2cca6fe2543
[INFO] running `Command { std: "docker" "start" "-a" "18bb5c549d931f4a6b505108f1e7faaa2bd80eb410cdaf5981cfb2cca6fe2543", kill_on_drop: false }`
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking monkey-lang-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Error`
[INFO] [stdout]  --> src/vm.rs:7:44
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Array, Boolean, Closure, CompiledFunc, Error, HashKey, HashMp, Integer, Null, Object,
[INFO] [stdout]   |                                            ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Node`
[INFO] [stdout]  --> src/parser.rs:4:69
[INFO] [stdout]   |
[INFO] [stdout] 4 |     IndexExpression, InfixExpression, IntegerLiteral, LetStatement, Node, PrefixExpression,
[INFO] [stdout]   |                                                                     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_builtin_by_name` is never used
[INFO] [stdout]   --> src/builtins.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub fn get_builtin_by_name(name: &str) -> Option<Builtin> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_string` is never used
[INFO] [stdout]   --> src/bytecode.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl Instructions {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn to_string(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fmt_instruction` is never used
[INFO] [stdout]   --> src/bytecode.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn fmt_instruction(definition: &Definition, operands: Vec<u16>) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_operands` is never used
[INFO] [stdout]   --> src/bytecode.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn read_operands(def: &Definition, ins: &[u8]) -> (Vec<u16>, usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]    --> src/bytecode.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 111 | struct Definition {
[INFO] [stdout]     |        ---------- field in this struct
[INFO] [stdout] 112 |     name: String,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_u8` is never used
[INFO] [stdout]    --> src/bytecode.rs:189:12
[INFO] [stdout]     |
[INFO] [stdout] 188 | impl Opcode {
[INFO] [stdout]     | ----------- method in this implementation
[INFO] [stdout] 189 |     pub fn to_u8(&self) -> u8 {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lookup` is never used
[INFO] [stdout]    --> src/bytecode.rs:194:4
[INFO] [stdout]     |
[INFO] [stdout] 194 | fn lookup(op: Opcode) -> Result<&'static Definition, String> {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `store` and `outer` are never read
[INFO] [stdout]  --> src/environment.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct Environment {
[INFO] [stdout]   |            ----------- fields in this struct
[INFO] [stdout] 8 |     store: HashMap<String, Rc<dyn Object>>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 9 |     outer: Option<Rc<RefCell<Environment>>>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `new_enclosed`, `get`, and `set` are never used
[INFO] [stdout]   --> src/environment.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl Environment {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 13 |     pub fn new() -> Rc<RefCell<Self>> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     pub fn new_enclosed(outer: Rc<RefCell<Environment>>) -> Rc<RefCell<Self>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 27 |     pub fn get(&self, name: &str) -> Option<Rc<dyn Object>> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |     pub fn set(&mut self, name: String, val: Rc<dyn Object>) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `env` is never read
[INFO] [stdout]    --> src/object.rs:186:9
[INFO] [stdout]     |
[INFO] [stdout] 183 | pub struct Function {
[INFO] [stdout]     |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 186 |     pub env: Rc<RefCell<Environment>>,
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `as_str` is never used
[INFO] [stdout]   --> src/symbol_table.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl SymbolScope {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 20 |     fn as_str(&self) -> &'static str {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new_with_global_state` and `last_popped_stack_element` are never used
[INFO] [stdout]    --> src/vm.rs:58:12
[INFO] [stdout]     |
[INFO] [stdout] 32  | impl<'a> VirtualMachine<'a> {
[INFO] [stdout]     | --------------------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 58  |     pub fn new_with_global_state(bytecode: Bytecode<'a>, state: Vec<Rc<dyn Object>>) -> Self {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 286 |     pub fn last_popped_stack_element(&self) -> Rc<dyn Object> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_string` is never used
[INFO] [stdout]   --> src/bytecode.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl Instructions {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn to_string(&self) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fmt_instruction` is never used
[INFO] [stdout]   --> src/bytecode.rs:63:4
[INFO] [stdout]    |
[INFO] [stdout] 63 | fn fmt_instruction(definition: &Definition, operands: Vec<u16>) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_operands` is never used
[INFO] [stdout]   --> src/bytecode.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn read_operands(def: &Definition, ins: &[u8]) -> (Vec<u16>, usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]    --> src/bytecode.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 111 | struct Definition {
[INFO] [stdout]     |        ---------- field in this struct
[INFO] [stdout] 112 |     name: String,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_u8` is never used
[INFO] [stdout]    --> src/bytecode.rs:189:12
[INFO] [stdout]     |
[INFO] [stdout] 188 | impl Opcode {
[INFO] [stdout]     | ----------- method in this implementation
[INFO] [stdout] 189 |     pub fn to_u8(&self) -> u8 {
[INFO] [stdout]     |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lookup` is never used
[INFO] [stdout]    --> src/bytecode.rs:194:4
[INFO] [stdout]     |
[INFO] [stdout] 194 | fn lookup(op: Opcode) -> Result<&'static Definition, String> {
[INFO] [stdout]     |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `env` is never read
[INFO] [stdout]    --> src/object.rs:186:9
[INFO] [stdout]     |
[INFO] [stdout] 183 | pub struct Function {
[INFO] [stdout]     |            -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 186 |     pub env: Rc<RefCell<Environment>>,
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `as_str` is never used
[INFO] [stdout]   --> src/symbol_table.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl SymbolScope {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 20 |     fn as_str(&self) -> &'static str {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new_with_global_state` is never used
[INFO] [stdout]   --> src/vm.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl<'a> VirtualMachine<'a> {
[INFO] [stdout]    | --------------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub fn new_with_global_state(bytecode: Bytecode<'a>, state: Vec<Rc<dyn Object>>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "18bb5c549d931f4a6b505108f1e7faaa2bd80eb410cdaf5981cfb2cca6fe2543", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18bb5c549d931f4a6b505108f1e7faaa2bd80eb410cdaf5981cfb2cca6fe2543", kill_on_drop: false }`
[INFO] [stdout] 18bb5c549d931f4a6b505108f1e7faaa2bd80eb410cdaf5981cfb2cca6fe2543