[INFO] cloning repository https://github.com/seansiddens/Nano
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/seansiddens/Nano" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fseansiddens%2FNano", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fseansiddens%2FNano'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7d9faef287f0b003cd6e955d311e30b37328d0e6
[INFO] testing seansiddens/Nano against beta-2026-03-05 for beta-1.95-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fseansiddens%2FNano" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/seansiddens/Nano
[INFO] finished tweaking git repo https://github.com/seansiddens/Nano
[INFO] tweaked toml for git repo https://github.com/seansiddens/Nano written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/seansiddens/Nano on toolchain beta-2026-03-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/seansiddens/Nano 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" "+beta-2026-03-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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" "+beta-2026-03-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c76034ba392a8d8c5fa0b0aa11d5e1bbd27b55ccc6709b3e98b8c4d40dd546a7
[INFO] running `Command { std: "docker" "start" "-a" "c76034ba392a8d8c5fa0b0aa11d5e1bbd27b55ccc6709b3e98b8c4d40dd546a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c76034ba392a8d8c5fa0b0aa11d5e1bbd27b55ccc6709b3e98b8c4d40dd546a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c76034ba392a8d8c5fa0b0aa11d5e1bbd27b55ccc6709b3e98b8c4d40dd546a7", kill_on_drop: false }`
[INFO] [stdout] c76034ba392a8d8c5fa0b0aa11d5e1bbd27b55ccc6709b3e98b8c4d40dd546a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2026-03-05" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3dc1cfbf004f7eb8b066e4844d196af1b109d333e733925699fa6b6c45a9c63a
[INFO] running `Command { std: "docker" "start" "-a" "3dc1cfbf004f7eb8b066e4844d196af1b109d333e733925699fa6b6c45a9c63a", kill_on_drop: false }`
[INFO] [stderr]    Compiling nano v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/types.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Binop` is never used
[INFO] [stdout]  --> src/types.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub enum Binop {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Id` is never used
[INFO] [stdout]   --> src/types.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub type Id = String;
[INFO] [stdout]    |          ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Env` is never used
[INFO] [stdout]   --> src/types.rs:41:10
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub type Env = HashMap<String, Value>;
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expr` is never used
[INFO] [stdout]   --> src/types.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub enum Expr {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Value` is never used
[INFO] [stdout]   --> src/types.rs:90:10
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub enum Value {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `TVar` is never used
[INFO] [stdout]    --> src/types.rs:142:10
[INFO] [stdout]     |
[INFO] [stdout] 142 | pub type TVar = String;
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `TypeEnv` is never used
[INFO] [stdout]    --> src/types.rs:145:10
[INFO] [stdout]     |
[INFO] [stdout] 145 | pub type TypeEnv = HashMap<Id, Poly>;
[INFO] [stdout]     |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Subst` is never used
[INFO] [stdout]    --> src/types.rs:148:10
[INFO] [stdout]     |
[INFO] [stdout] 148 | pub type Subst = HashMap<TVar, Type>;
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Type` is never used
[INFO] [stdout]    --> src/types.rs:151:10
[INFO] [stdout]     |
[INFO] [stdout] 151 | pub enum Type {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Poly` is never used
[INFO] [stdout]    --> src/types.rs:160:10
[INFO] [stdout]     |
[INFO] [stdout] 160 | pub enum Poly {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lookup_id` is never used
[INFO] [stdout]  --> src/eval.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn lookup_id(env: &Env, id: &Id) -> Value {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `extend_env` is never used
[INFO] [stdout]   --> src/eval.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn extend_env(env: &mut Env, id: &Id, val: &Value) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eval` is never used
[INFO] [stdout]   --> src/eval.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn eval(env: Env, e: Expr) -> Value {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eval_op` is never used
[INFO] [stdout]   --> src/eval.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn eval_op(binop: Binop, val1: Value, val2: Value) -> Value {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `HasTVars` is never used
[INFO] [stdout]  --> src/typecheck.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait HasTVars {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "3dc1cfbf004f7eb8b066e4844d196af1b109d333e733925699fa6b6c45a9c63a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dc1cfbf004f7eb8b066e4844d196af1b109d333e733925699fa6b6c45a9c63a", kill_on_drop: false }`
[INFO] [stdout] 3dc1cfbf004f7eb8b066e4844d196af1b109d333e733925699fa6b6c45a9c63a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2026-03-05" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d0aaede68a18a8f1b643e7c2fcd588fd12dba10566cf36ee6a787814cfa84163
[INFO] running `Command { std: "docker" "start" "-a" "d0aaede68a18a8f1b643e7c2fcd588fd12dba10566cf36ee6a787814cfa84163", kill_on_drop: false }`
[INFO] [stderr]    Compiling nano v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/types.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Binop` is never used
[INFO] [stdout]  --> src/types.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub enum Binop {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Id` is never used
[INFO] [stdout]   --> src/types.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub type Id = String;
[INFO] [stdout]    |          ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Env` is never used
[INFO] [stdout]   --> src/types.rs:41:10
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub type Env = HashMap<String, Value>;
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expr` is never used
[INFO] [stdout]   --> src/types.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub enum Expr {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Value` is never used
[INFO] [stdout]   --> src/types.rs:90:10
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub enum Value {
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `TVar` is never used
[INFO] [stdout]    --> src/types.rs:142:10
[INFO] [stdout]     |
[INFO] [stdout] 142 | pub type TVar = String;
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `TypeEnv` is never used
[INFO] [stdout]    --> src/types.rs:145:10
[INFO] [stdout]     |
[INFO] [stdout] 145 | pub type TypeEnv = HashMap<Id, Poly>;
[INFO] [stdout]     |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Subst` is never used
[INFO] [stdout]    --> src/types.rs:148:10
[INFO] [stdout]     |
[INFO] [stdout] 148 | pub type Subst = HashMap<TVar, Type>;
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Type` is never used
[INFO] [stdout]    --> src/types.rs:151:10
[INFO] [stdout]     |
[INFO] [stdout] 151 | pub enum Type {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Poly` is never used
[INFO] [stdout]    --> src/types.rs:160:10
[INFO] [stdout]     |
[INFO] [stdout] 160 | pub enum Poly {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lookup_id` is never used
[INFO] [stdout]  --> src/eval.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn lookup_id(env: &Env, id: &Id) -> Value {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `extend_env` is never used
[INFO] [stdout]   --> src/eval.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn extend_env(env: &mut Env, id: &Id, val: &Value) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eval` is never used
[INFO] [stdout]   --> src/eval.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn eval(env: Env, e: Expr) -> Value {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eval_op` is never used
[INFO] [stdout]   --> src/eval.rs:62:4
[INFO] [stdout]    |
[INFO] [stdout] 62 | fn eval_op(binop: Binop, val1: Value, val2: Value) -> Value {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `HasTVars` is never used
[INFO] [stdout]  --> src/typecheck.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait HasTVars {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::hash::Hash`
[INFO] [stdout]  --> src/types.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::hash::Hash;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]    --> src/eval.rs:207:13
[INFO] [stdout]     |
[INFO] [stdout] 207 |         let expr = Expr::ELet(
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Eq`, `Ne`, `Le`, `And`, `Or`, and `Cons` are never constructed
[INFO] [stdout]   --> src/types.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  6 | pub enum Binop {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 11 |     Eq,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 12 |     Ne,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 13 |     Lt,
[INFO] [stdout] 14 |     Le,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 15 |     And,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 16 |     Or,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 17 |     Cons,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Binop` has derived impls for the traits `Clone` and `Debug`, 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: variants `EIf`, `EApp`, and `ELam` are never constructed
[INFO] [stdout]   --> src/types.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub enum Expr {
[INFO] [stdout]    |          ---- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 50 |     EIf(Box<Expr>, Box<Expr>, Box<Expr>),
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 51 |     ELet(Id, Box<Expr>, Box<Expr>),
[INFO] [stdout] 52 |     EApp(Box<Expr>, Box<Expr>),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 53 |     ELam(Id, Box<Expr>),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `VErr` and `VPrim` are never constructed
[INFO] [stdout]   --> src/types.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 90 | pub enum Value {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 96 |     VErr(String),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 97 |     VPrim(fn(Value) -> Value),
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Value` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `TypeEnv` is never used
[INFO] [stdout]    --> src/types.rs:145:10
[INFO] [stdout]     |
[INFO] [stdout] 145 | pub type TypeEnv = HashMap<Id, Poly>;
[INFO] [stdout]     |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Subst` is never used
[INFO] [stdout]    --> src/types.rs:148:10
[INFO] [stdout]     |
[INFO] [stdout] 148 | pub type Subst = HashMap<TVar, Type>;
[INFO] [stdout]     |          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `TBool` and `TList` are never constructed
[INFO] [stdout]    --> src/types.rs:153:5
[INFO] [stdout]     |
[INFO] [stdout] 151 | pub enum Type {
[INFO] [stdout]     |          ---- variants in this enum
[INFO] [stdout] 152 |     TInt,                            // Int
[INFO] [stdout] 153 |     TBool,                           // Bool
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 156 |     TList(Box<Type>),                // list type: [T]
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Type` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Poly` is never used
[INFO] [stdout]    --> src/types.rs:160:10
[INFO] [stdout]     |
[INFO] [stdout] 160 | pub enum Poly {
[INFO] [stdout]     |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "d0aaede68a18a8f1b643e7c2fcd588fd12dba10566cf36ee6a787814cfa84163", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0aaede68a18a8f1b643e7c2fcd588fd12dba10566cf36ee6a787814cfa84163", kill_on_drop: false }`
[INFO] [stdout] d0aaede68a18a8f1b643e7c2fcd588fd12dba10566cf36ee6a787814cfa84163
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2026-03-05" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 267c19109bb10c87bb79320992bfbfc64cb5a252ba41a01c31ec57afd2d3a490
[INFO] running `Command { std: "docker" "start" "-a" "267c19109bb10c87bb79320992bfbfc64cb5a252ba41a01c31ec57afd2d3a490", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::hash::Hash`
[INFO] [stderr]  --> src/types.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::hash::Hash;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Binop` is never used
[INFO] [stderr]  --> src/types.rs:6:10
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub enum Binop {
[INFO] [stderr]   |          ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `Id` is never used
[INFO] [stderr]   --> src/types.rs:39:10
[INFO] [stderr]    |
[INFO] [stderr] 39 | pub type Id = String;
[INFO] [stderr]    |          ^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `Env` is never used
[INFO] [stderr]   --> src/types.rs:41:10
[INFO] [stderr]    |
[INFO] [stderr] 41 | pub type Env = HashMap<String, Value>;
[INFO] [stderr]    |          ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Expr` is never used
[INFO] [stderr]   --> src/types.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub enum Expr {
[INFO] [stderr]    |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Value` is never used
[INFO] [stderr]   --> src/types.rs:90:10
[INFO] [stderr]    |
[INFO] [stderr] 90 | pub enum Value {
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `TVar` is never used
[INFO] [stderr]    --> src/types.rs:142:10
[INFO] [stderr]     |
[INFO] [stderr] 142 | pub type TVar = String;
[INFO] [stderr]     |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `TypeEnv` is never used
[INFO] [stderr]    --> src/types.rs:145:10
[INFO] [stderr]     |
[INFO] [stderr] 145 | pub type TypeEnv = HashMap<Id, Poly>;
[INFO] [stderr]     |          ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias `Subst` is never used
[INFO] [stderr]    --> src/types.rs:148:10
[INFO] [stderr]     |
[INFO] [stderr] 148 | pub type Subst = HashMap<TVar, Type>;
[INFO] [stderr]     |          ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Type` is never used
[INFO] [stderr]    --> src/types.rs:151:10
[INFO] [stderr]     |
[INFO] [stderr] 151 | pub enum Type {
[INFO] [stderr]     |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum `Poly` is never used
[INFO] [stderr]    --> src/types.rs:160:10
[INFO] [stderr]     |
[INFO] [stderr] 160 | pub enum Poly {
[INFO] [stderr]     |          ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `lookup_id` is never used
[INFO] [stderr]  --> src/eval.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn lookup_id(env: &Env, id: &Id) -> Value {
[INFO] [stderr]   |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `extend_env` is never used
[INFO] [stderr]   --> src/eval.rs:14:4
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn extend_env(env: &mut Env, id: &Id, val: &Value) {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `eval` is never used
[INFO] [stderr]   --> src/eval.rs:19:8
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub fn eval(env: Env, e: Expr) -> Value {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `eval_op` is never used
[INFO] [stderr]   --> src/eval.rs:62:4
[INFO] [stderr]    |
[INFO] [stderr] 62 | fn eval_op(binop: Binop, val1: Value, val2: Value) -> Value {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait `HasTVars` is never used
[INFO] [stderr]  --> src/typecheck.rs:3:7
[INFO] [stderr]   |
[INFO] [stderr] 3 | trait HasTVars {
[INFO] [stderr]   |       ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `nano` (lib) generated 16 warnings (run `cargo fix --lib -p nano` to apply 1 suggestion)
[INFO] [stderr] warning: unused variable: `expr`
[INFO] [stderr]    --> src/eval.rs:207:13
[INFO] [stderr]     |
[INFO] [stderr] 207 |         let expr = Expr::ELet(
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Eq`, `Ne`, `Le`, `And`, `Or`, and `Cons` are never constructed
[INFO] [stderr]   --> src/types.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr]  6 | pub enum Binop {
[INFO] [stderr]    |          ----- variants in this enum
[INFO] [stderr] ...
[INFO] [stderr] 11 |     Eq,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 12 |     Ne,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 13 |     Lt,
[INFO] [stderr] 14 |     Le,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 15 |     And,
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 16 |     Or,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 17 |     Cons,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Binop` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variants `EIf`, `EApp`, and `ELam` are never constructed
[INFO] [stderr]   --> src/types.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub enum Expr {
[INFO] [stderr]    |          ---- variants in this enum
[INFO] [stderr] ...
[INFO] [stderr] 50 |     EIf(Box<Expr>, Box<Expr>, Box<Expr>),
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 51 |     ELet(Id, Box<Expr>, Box<Expr>),
[INFO] [stderr] 52 |     EApp(Box<Expr>, Box<Expr>),
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 53 |     ELam(Id, Box<Expr>),
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Expr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variants `VErr` and `VPrim` are never constructed
[INFO] [stderr]   --> src/types.rs:96:5
[INFO] [stderr]    |
[INFO] [stderr] 90 | pub enum Value {
[INFO] [stderr]    |          ----- variants in this enum
[INFO] [stderr] ...
[INFO] [stderr] 96 |     VErr(String),
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 97 |     VPrim(fn(Value) -> Value),
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Value` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variants `TBool` and `TList` are never constructed
[INFO] [stderr]    --> src/types.rs:153:5
[INFO] [stderr]     |
[INFO] [stderr] 151 | pub enum Type {
[INFO] [stderr]     |          ---- variants in this enum
[INFO] [stderr] 152 |     TInt,                            // Int
[INFO] [stderr] 153 |     TBool,                           // Bool
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 156 |     TList(Box<Type>),                // list type: [T]
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Type` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `nano` (lib test) generated 9 warnings (4 duplicates) (run `cargo fix --lib -p nano --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/nano-c585534d1ff8039e)
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test eval::tests::env_extend_test ... ok
[INFO] [stdout] test eval::tests::eval_div ... ok
[INFO] [stdout] test eval::tests::eval_lt ... ok
[INFO] [stdout] test eval::tests::eval_minus ... ok
[INFO] [stdout] test eval::tests::eval_mul ... ok
[INFO] [stdout] test eval::tests::eval_plus ... ok
[INFO] [stdout] test eval::tests::eval_lt_fail - should panic ... ok
[INFO] [stdout] test typecheck::tests::free_tvars_type ... ok
[INFO] [stdout] test types::tests::value_equality ... ok
[INFO] [stdout] test eval::tests::eval_minus_fail - should panic ... ok
[INFO] [stdout] test eval::tests::eval_plus_fail - should panic ... ok
[INFO] [stdout] test eval::tests::lookup_unbound_var - should panic ... ok
[INFO] [stdout] test eval::tests::eval_mul_fail - should panic ... ok
[INFO] [stdout] test eval::tests::eval_div_fail - should panic ... ok
[INFO] [stdout] test eval::tests::eval_test ... ok
[INFO] [stderr]    Doc-tests nano
[INFO] [stdout] test eval::tests::lookup_test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.16s
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "267c19109bb10c87bb79320992bfbfc64cb5a252ba41a01c31ec57afd2d3a490", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "267c19109bb10c87bb79320992bfbfc64cb5a252ba41a01c31ec57afd2d3a490", kill_on_drop: false }`
[INFO] [stdout] 267c19109bb10c87bb79320992bfbfc64cb5a252ba41a01c31ec57afd2d3a490
