[INFO] cloning repository https://github.com/kerlw/monkey_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kerlw/monkey_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkerlw%2Fmonkey_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkerlw%2Fmonkey_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 12f382970f75047ebdbc586f38108d5089e1261b
[INFO] checking kerlw/monkey_rust against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkerlw%2Fmonkey_rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kerlw/monkey_rust
[INFO] finished tweaking git repo https://github.com/kerlw/monkey_rust
[INFO] tweaked toml for git repo https://github.com/kerlw/monkey_rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kerlw/monkey_rust on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kerlw/monkey_rust 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.75
[INFO] [stderr]   Downloaded ctor v0.1.20
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.75
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.25
[INFO] [stderr]   Downloaded value-bag v1.0.0-alpha.7
[INFO] [stderr]   Downloaded async-attributes v1.1.2
[INFO] [stderr]   Downloaded ctrlc v3.2.0
[INFO] [stderr]   Downloaded fastrand v1.5.0
[INFO] [stderr]   Downloaded async-ctrlc v1.2.0
[INFO] [stderr]   Downloaded futures-core v0.3.16
[INFO] [stderr]   Downloaded futures-io v0.3.16
[INFO] [stderr]   Downloaded slab v0.4.4
[INFO] [stderr]   Downloaded async-lock v2.4.0
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.75
[INFO] [stderr]   Downloaded async-process v1.2.0
[INFO] [stderr]   Downloaded polling v2.1.0
[INFO] [stderr]   Downloaded socket2 v0.4.1
[INFO] [stderr]   Downloaded signal-hook v0.3.9
[INFO] [stderr]   Downloaded futures-channel v0.3.16
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.75
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[INFO] [stderr]   Downloaded js-sys v0.3.52
[INFO] [stderr]   Downloaded syn v1.0.74
[INFO] [stderr]   Downloaded nix v0.22.1
[INFO] [stderr]   Downloaded web-sys v0.3.52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 25e38d43de28eab2cda48104bf2fc4b5c9b82f9c5337cfefb7def64f6b24dff6
[INFO] running `Command { std: "docker" "start" "-a" "25e38d43de28eab2cda48104bf2fc4b5c9b82f9c5337cfefb7def64f6b24dff6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25e38d43de28eab2cda48104bf2fc4b5c9b82f9c5337cfefb7def64f6b24dff6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25e38d43de28eab2cda48104bf2fc4b5c9b82f9c5337cfefb7def64f6b24dff6", kill_on_drop: false }`
[INFO] [stdout] 25e38d43de28eab2cda48104bf2fc4b5c9b82f9c5337cfefb7def64f6b24dff6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 229a995e1044804ff2dde548c20d1909dbeade1d6c739d82b2c0c69051e97268
[INFO] running `Command { std: "docker" "start" "-a" "229a995e1044804ff2dde548c20d1909dbeade1d6c739d82b2c0c69051e97268", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking futures-io v0.3.16
[INFO] [stderr]     Checking fastrand v1.5.0
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.7
[INFO] [stderr]     Checking slab v0.4.4
[INFO] [stderr]    Compiling signal-hook v0.3.9
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking async-lock v2.4.0
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking socket2 v0.4.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking nix v0.22.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking ctrlc v3.2.0
[INFO] [stderr]     Checking async-ctrlc v1.2.0
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]     Checking polling v2.1.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking async-io v1.6.0
[INFO] [stderr]     Checking async-process v1.2.0
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking monkey_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/eval/evaluator.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<'a> Evaluator<'a> {
[INFO] [stdout]    | ---------------------- associated function in this implementation
[INFO] [stdout] 15 |     pub fn new(statements: &'a Vec<Statement>) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BlockStatement` is never constructed
[INFO] [stdout]   --> src/parser/program.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct BlockStatement {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `to_string` is never used
[INFO] [stdout]    --> src/parser/program.rs:138:12
[INFO] [stdout]     |
[INFO] [stdout] 137 | impl Program {
[INFO] [stdout]     | ------------ method in this implementation
[INFO] [stdout] 138 |     pub fn to_string(&self) -> String {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function pointer comparisons do not produce meaningful results since their addresses are not guaranteed to be unique
[INFO] [stdout]   --> src/eval/mod.rs:27:22
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[derive(Debug, PartialEq, Clone)]
[INFO] [stdout]    |                 --------- in this derive macro expansion
[INFO] [stdout] ...
[INFO] [stdout] 27 |     BuiltinFn(usize, BuiltinFunction),
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the address of the same function can vary between different codegen units
[INFO] [stdout]    = note: furthermore, different functions could have the same address after being merged together
[INFO] [stdout]    = note: for more information visit <https://doc.rust-lang.org/nightly/core/ptr/fn.fn_addr_eq.html>
[INFO] [stdout]    = note: `#[warn(unpredictable_function_pointer_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BlockStatement` is never constructed
[INFO] [stdout]   --> src/parser/program.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct BlockStatement {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function pointer comparisons do not produce meaningful results since their addresses are not guaranteed to be unique
[INFO] [stdout]   --> src/eval/mod.rs:27:22
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[derive(Debug, PartialEq, Clone)]
[INFO] [stdout]    |                 --------- in this derive macro expansion
[INFO] [stdout] ...
[INFO] [stdout] 27 |     BuiltinFn(usize, BuiltinFunction),
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the address of the same function can vary between different codegen units
[INFO] [stdout]    = note: furthermore, different functions could have the same address after being merged together
[INFO] [stdout]    = note: for more information visit <https://doc.rust-lang.org/nightly/core/ptr/fn.fn_addr_eq.html>
[INFO] [stdout]    = note: `#[warn(unpredictable_function_pointer_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.41s
[INFO] running `Command { std: "docker" "inspect" "229a995e1044804ff2dde548c20d1909dbeade1d6c739d82b2c0c69051e97268", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "229a995e1044804ff2dde548c20d1909dbeade1d6c739d82b2c0c69051e97268", kill_on_drop: false }`
[INFO] [stdout] 229a995e1044804ff2dde548c20d1909dbeade1d6c739d82b2c0c69051e97268
