[INFO] cloning repository https://github.com/PiNengShaoNian/rs-monkey-lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PiNengShaoNian/rs-monkey-lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPiNengShaoNian%2Frs-monkey-lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPiNengShaoNian%2Frs-monkey-lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6db6d36c5cc5f6a2ada52cf04ab23ec28f248fa2
[INFO] checking PiNengShaoNian/rs-monkey-lang against master#03c609abb6638f9d7f49f34326d4137d07f5cd61 for pr-155945
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPiNengShaoNian%2Frs-monkey-lang" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/PiNengShaoNian/rs-monkey-lang
[INFO] finished tweaking git repo https://github.com/PiNengShaoNian/rs-monkey-lang
[INFO] tweaked toml for git repo https://github.com/PiNengShaoNian/rs-monkey-lang written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/PiNengShaoNian/rs-monkey-lang on toolchain 03c609abb6638f9d7f49f34326d4137d07f5cd61
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/PiNengShaoNian/rs-monkey-lang 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" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustyline v1.0.0
[INFO] [stderr]   Downloaded nix v0.5.1
[INFO] [stderr]   Downloaded bitflags v0.4.0
[INFO] [stderr]   Downloaded encode_unicode v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f6eabeee4cf7f82391e4969c6aa927aabfba20984c949cface329fd5d028657
[INFO] running `Command { std: "docker" "start" "-a" "0f6eabeee4cf7f82391e4969c6aa927aabfba20984c949cface329fd5d028657", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f6eabeee4cf7f82391e4969c6aa927aabfba20984c949cface329fd5d028657", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f6eabeee4cf7f82391e4969c6aa927aabfba20984c949cface329fd5d028657", kill_on_drop: false }`
[INFO] [stdout] 0f6eabeee4cf7f82391e4969c6aa927aabfba20984c949cface329fd5d028657
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+03c609abb6638f9d7f49f34326d4137d07f5cd61" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1a8550ef25ed4c40c27fa89f62d49de18a172ce6e2cd661846847d8f4809ab4f
[INFO] running `Command { std: "docker" "start" "-a" "1a8550ef25ed4c40c27fa89f62d49de18a172ce6e2cd661846847d8f4809ab4f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.158
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]     Checking unicode-width v0.1.13
[INFO] [stderr]     Checking encode_unicode v0.1.3
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking rustyline v1.0.0
[INFO] [stderr]     Checking rs-monkey-lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `Plus` is never constructed
[INFO] [stdout]  --> src/ast.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum Prefix {
[INFO] [stdout]   |          ------ variant in this enum
[INFO] [stdout] 8 |     Plus,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Prefix` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind` and `msg` are never read
[INFO] [stdout]   --> src/parser/mod.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct ParseError {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 15 |     kind: ParseErrorKind,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 16 |     msg: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[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/evaluator/object.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(PartialEq, Clone, Debug)]
[INFO] [stdout]    |          --------- in this derive macro expansion
[INFO] [stdout] ...
[INFO] [stdout] 21 |     Builtin(usize, BuiltinFunc),
[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: variant `Plus` is never constructed
[INFO] [stdout]  --> src/ast.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum Prefix {
[INFO] [stdout]   |          ------ variant in this enum
[INFO] [stdout] 8 |     Plus,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Prefix` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind` and `msg` are never read
[INFO] [stdout]   --> src/parser/mod.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct ParseError {
[INFO] [stdout]    |            ---------- fields in this struct
[INFO] [stdout] 15 |     kind: ParseErrorKind,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 16 |     msg: String,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ParseError` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[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/evaluator/object.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 13 | #[derive(PartialEq, Clone, Debug)]
[INFO] [stdout]    |          --------- in this derive macro expansion
[INFO] [stdout] ...
[INFO] [stdout] 21 |     Builtin(usize, BuiltinFunc),
[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 2.54s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: bitflags v0.4.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "1a8550ef25ed4c40c27fa89f62d49de18a172ce6e2cd661846847d8f4809ab4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a8550ef25ed4c40c27fa89f62d49de18a172ce6e2cd661846847d8f4809ab4f", kill_on_drop: false }`
[INFO] [stdout] 1a8550ef25ed4c40c27fa89f62d49de18a172ce6e2cd661846847d8f4809ab4f
