[INFO] cloning repository https://github.com/memoryleak47/constraint-lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/memoryleak47/constraint-lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmemoryleak47%2Fconstraint-lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmemoryleak47%2Fconstraint-lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a17e347d8fe9b30c8533ab65fc57a1288bbf5dc6
[INFO] checking memoryleak47/constraint-lang against try#ac4c3613be2acd5395b65d85e5657b81e3c982f0 for pr-154585
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmemoryleak47%2Fconstraint-lang" "/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/memoryleak47/constraint-lang
[INFO] finished tweaking git repo https://github.com/memoryleak47/constraint-lang
[INFO] tweaked toml for git repo https://github.com/memoryleak47/constraint-lang written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/memoryleak47/constraint-lang on toolchain ac4c3613be2acd5395b65d85e5657b81e3c982f0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ac4c3613be2acd5395b65d85e5657b81e3c982f0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/memoryleak47/constraint-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" "+ac4c3613be2acd5395b65d85e5657b81e3c982f0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking memoryleak47/constraint-lang against try#ac4c3613be2acd5395b65d85e5657b81e3c982f0 for pr-154585
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmemoryleak47%2Fconstraint-lang" "/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/memoryleak47/constraint-lang
[INFO] finished tweaking git repo https://github.com/memoryleak47/constraint-lang
[INFO] tweaked toml for git repo https://github.com/memoryleak47/constraint-lang written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/memoryleak47/constraint-lang on toolchain ac4c3613be2acd5395b65d85e5657b81e3c982f0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ac4c3613be2acd5395b65d85e5657b81e3c982f0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/memoryleak47/constraint-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" "+ac4c3613be2acd5395b65d85e5657b81e3c982f0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[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" "+ac4c3613be2acd5395b65d85e5657b81e3c982f0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fb4a141b11e1b05fa7842809f061344ab94e2ebe564b52499f36d2ee1168e1d8
[INFO] running `Command { std: "docker" "start" "-a" "fb4a141b11e1b05fa7842809f061344ab94e2ebe564b52499f36d2ee1168e1d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb4a141b11e1b05fa7842809f061344ab94e2ebe564b52499f36d2ee1168e1d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb4a141b11e1b05fa7842809f061344ab94e2ebe564b52499f36d2ee1168e1d8", kill_on_drop: false }`
[INFO] [stdout] fb4a141b11e1b05fa7842809f061344ab94e2ebe564b52499f36d2ee1168e1d8
[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=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" "+ac4c3613be2acd5395b65d85e5657b81e3c982f0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 06b1da172d09dd42dcde5d588f1b1e0c765c58b224284b757620aec86d38bea6
[INFO] running `Command { std: "docker" "start" "-a" "06b1da172d09dd42dcde5d588f1b1e0c765c58b224284b757620aec86d38bea6", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]     Checking libc v0.2.39
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking productivity-lang-compiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 |     CDef(CDef),
[INFO] [stdout]    |     ---- ^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AstNode` 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] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 37 -     CDef(CDef),
[INFO] [stdout] 37 +     CDef(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `body` are never read
[INFO] [stdout]   --> src/ast/mod.rs:50:6
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub struct CDef {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 50 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 51 |     pub body: CExpr
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CDef` 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: field `items` is never read
[INFO] [stdout]   --> src/ast/mod.rs:57:6
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub struct CBlock {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 57 |     pub items: Vec<CItem>
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CBlock` 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: fields `0` and `1` are never read
[INFO] [stdout]   --> src/ast/mod.rs:62:6
[INFO] [stdout]    |
[INFO] [stdout] 62 |     And(Box<CExpr>, Box<CExpr>),
[INFO] [stdout]    |     --- ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CExpr` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 62 -     And(Box<CExpr>, Box<CExpr>),
[INFO] [stdout] 62 +     And((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/ast/mod.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 |     Or(Box<CExpr>, Box<CExpr>),
[INFO] [stdout]    |     -- ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CExpr` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 63 -     Or(Box<CExpr>, Box<CExpr>),
[INFO] [stdout] 63 +     Or((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:64:6
[INFO] [stdout]    |
[INFO] [stdout] 64 |     Var(String),
[INFO] [stdout]    |     --- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CExpr` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 64 -     Var(String),
[INFO] [stdout] 64 +     Var(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     CBlock(CBlock)
[INFO] [stdout]    |     ------ ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CExpr` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 65 -     CBlock(CBlock)
[INFO] [stdout] 65 +     CBlock(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `c_expr` is never read
[INFO] [stdout]   --> src/ast/mod.rs:72:6
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub struct CItem {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 71 |     pub name: String,
[INFO] [stdout] 72 |     pub c_expr: Option<CExpr>
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CItem` 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: fields `0` and `1` are never read
[INFO] [stdout]    --> src/ast/mod.rs:147:8
[INFO] [stdout]     |
[INFO] [stdout] 147 |     PreOp(PreOp, Box<Expr>),
[INFO] [stdout]     |     ----- ^^^^^  ^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     fields in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Expr` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]     |
[INFO] [stdout] 147 -     PreOp(PreOp, Box<Expr>),
[INFO] [stdout] 147 +     PreOp((), ()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `String`, `Null`, `Array`, `Tuple`, and `Object` are never constructed
[INFO] [stdout]    --> src/ast/mod.rs:154:2
[INFO] [stdout]     |
[INFO] [stdout] 146 | pub enum Expr {
[INFO] [stdout]     |          ---- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 154 |     String(String),
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 155 |     Var(String),
[INFO] [stdout] 156 |     Null, // the `null` expression
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 159 |     Array(Vec<Expr>),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 160 |     Tuple(Vec<Expr>),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 161 |     Object(HashMap<String, Box<Expr>>), // { f = 2 }
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Expr` 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: field `cexpr` is never read
[INFO] [stdout]    --> src/ast/mod.rs:172:6
[INFO] [stdout]     |
[INFO] [stdout] 169 | pub struct VarDec {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 172 |     pub cexpr: Option<CExpr>
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `VarDec` 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: field `cctxt` is never read
[INFO] [stdout]   --> src/ctxt/mod.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Ctxt {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 12 |     pub ast: Ast,
[INFO] [stdout] 13 |     pub cctxt: CCtxt
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/exec/mod.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     String(String),
[INFO] [stdout]    |     ------ ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Val` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 14 -     String(String),
[INFO] [stdout] 14 +     String(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/exec/mod.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Array(Vec<Val>),
[INFO] [stdout]    |     ----- ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Val` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 16 -     Array(Vec<Val>),
[INFO] [stdout] 16 +     Array(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/exec/mod.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Tuple(Vec<Val>),
[INFO] [stdout]    |     ----- ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Val` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 17 -     Tuple(Vec<Val>),
[INFO] [stdout] 17 +     Tuple(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/exec/mod.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Object(HashMap<String, Box<Val>>),
[INFO] [stdout]    |     ------ ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Val` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 18 -     Object(HashMap<String, Box<Val>>),
[INFO] [stdout] 18 +     Object(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `dealloc` is never used
[INFO] [stdout]   --> src/exec/heap.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl<V> Heap<V> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 27 |     pub fn dealloc(&mut self, index: usize) -> Option<V> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 |     CDef(CDef),
[INFO] [stdout]    |     ---- ^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `AstNode` 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] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 37 -     CDef(CDef),
[INFO] [stdout] 37 +     CDef(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `body` are never read
[INFO] [stdout]   --> src/ast/mod.rs:50:6
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub struct CDef {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 50 |     pub name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 51 |     pub body: CExpr
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CDef` 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: field `items` is never read
[INFO] [stdout]   --> src/ast/mod.rs:57:6
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub struct CBlock {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] 57 |     pub items: Vec<CItem>
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CBlock` 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: fields `0` and `1` are never read
[INFO] [stdout]   --> src/ast/mod.rs:62:6
[INFO] [stdout]    |
[INFO] [stdout] 62 |     And(Box<CExpr>, Box<CExpr>),
[INFO] [stdout]    |     --- ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CExpr` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 62 -     And(Box<CExpr>, Box<CExpr>),
[INFO] [stdout] 62 +     And((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/ast/mod.rs:63:5
[INFO] [stdout]    |
[INFO] [stdout] 63 |     Or(Box<CExpr>, Box<CExpr>),
[INFO] [stdout]    |     -- ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CExpr` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 63 -     Or(Box<CExpr>, Box<CExpr>),
[INFO] [stdout] 63 +     Or((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:64:6
[INFO] [stdout]    |
[INFO] [stdout] 64 |     Var(String),
[INFO] [stdout]    |     --- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CExpr` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 64 -     Var(String),
[INFO] [stdout] 64 +     Var(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/ast/mod.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |     CBlock(CBlock)
[INFO] [stdout]    |     ------ ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CExpr` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 65 -     CBlock(CBlock)
[INFO] [stdout] 65 +     CBlock(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `c_expr` is never read
[INFO] [stdout]   --> src/ast/mod.rs:72:6
[INFO] [stdout]    |
[INFO] [stdout] 70 | pub struct CItem {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 71 |     pub name: String,
[INFO] [stdout] 72 |     pub c_expr: Option<CExpr>
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CItem` 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: fields `0` and `1` are never read
[INFO] [stdout]    --> src/ast/mod.rs:147:8
[INFO] [stdout]     |
[INFO] [stdout] 147 |     PreOp(PreOp, Box<Expr>),
[INFO] [stdout]     |     ----- ^^^^^  ^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     fields in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Expr` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]     |
[INFO] [stdout] 147 -     PreOp(PreOp, Box<Expr>),
[INFO] [stdout] 147 +     PreOp((), ()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `String`, `Null`, `Array`, `Tuple`, and `Object` are never constructed
[INFO] [stdout]    --> src/ast/mod.rs:154:2
[INFO] [stdout]     |
[INFO] [stdout] 146 | pub enum Expr {
[INFO] [stdout]     |          ---- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 154 |     String(String),
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 155 |     Var(String),
[INFO] [stdout] 156 |     Null, // the `null` expression
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 159 |     Array(Vec<Expr>),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 160 |     Tuple(Vec<Expr>),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 161 |     Object(HashMap<String, Box<Expr>>), // { f = 2 }
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Expr` 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: field `cexpr` is never read
[INFO] [stdout]    --> src/ast/mod.rs:172:6
[INFO] [stdout]     |
[INFO] [stdout] 169 | pub struct VarDec {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 172 |     pub cexpr: Option<CExpr>
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `VarDec` 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: field `cctxt` is never read
[INFO] [stdout]   --> src/ctxt/mod.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct Ctxt {
[INFO] [stdout]    |            ---- field in this struct
[INFO] [stdout] 12 |     pub ast: Ast,
[INFO] [stdout] 13 |     pub cctxt: CCtxt
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/exec/mod.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     String(String),
[INFO] [stdout]    |     ------ ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Val` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 14 -     String(String),
[INFO] [stdout] 14 +     String(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/exec/mod.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Array(Vec<Val>),
[INFO] [stdout]    |     ----- ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Val` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 16 -     Array(Vec<Val>),
[INFO] [stdout] 16 +     Array(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/exec/mod.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Tuple(Vec<Val>),
[INFO] [stdout]    |     ----- ^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Val` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 17 -     Tuple(Vec<Val>),
[INFO] [stdout] 17 +     Tuple(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/exec/mod.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Object(HashMap<String, Box<Val>>),
[INFO] [stdout]    |     ------ ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Val` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 18 -     Object(HashMap<String, Box<Val>>),
[INFO] [stdout] 18 +     Object(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `dealloc` is never used
[INFO] [stdout]   --> src/exec/heap.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl<V> Heap<V> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 27 |     pub fn dealloc(&mut self, index: usize) -> Option<V> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.04s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v3.2.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 3`
[INFO] running `Command { std: "docker" "inspect" "06b1da172d09dd42dcde5d588f1b1e0c765c58b224284b757620aec86d38bea6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06b1da172d09dd42dcde5d588f1b1e0c765c58b224284b757620aec86d38bea6", kill_on_drop: false }`
[INFO] [stdout] 06b1da172d09dd42dcde5d588f1b1e0c765c58b224284b757620aec86d38bea6
