[INFO] fetching crate kz80_smalltalk 0.1.0...
[INFO] checking kz80_smalltalk-0.1.0 against master#8a703520e80d87d4423c01f9d4fbc9e5f6533a02 for pr-154205-1
[INFO] extracting crate kz80_smalltalk 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate kz80_smalltalk 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate kz80_smalltalk 0.1.0
[INFO] tweaked toml for crates.io crate kz80_smalltalk 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate kz80_smalltalk 0.1.0 on toolchain 8a703520e80d87d4423c01f9d4fbc9e5f6533a02
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate kz80_smalltalk 0.1.0 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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 622ae37acb3bb0e2117901ceec97f739cb05fa009a110a0032102b4aa7aae06b
[INFO] running `Command { std: "docker" "start" "-a" "622ae37acb3bb0e2117901ceec97f739cb05fa009a110a0032102b4aa7aae06b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "622ae37acb3bb0e2117901ceec97f739cb05fa009a110a0032102b4aa7aae06b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "622ae37acb3bb0e2117901ceec97f739cb05fa009a110a0032102b4aa7aae06b", kill_on_drop: false }`
[INFO] [stdout] 622ae37acb3bb0e2117901ceec97f739cb05fa009a110a0032102b4aa7aae06b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 939ee746ca7bc78b29b7cf7a55df6dc84fd544a35d9390b87f5a157906e5b10c
[INFO] running `Command { std: "docker" "start" "-a" "939ee746ca7bc78b29b7cf7a55df6dc84fd544a35d9390b87f5a157906e5b10c", kill_on_drop: false }`
[INFO] [stderr]     Checking kz80_smalltalk v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:13:16
[INFO] [stdout]    |
[INFO] [stdout] 13 |     PushSymbol(String),     // Push symbol literal
[INFO] [stdout]    |     ---------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 13 -     PushSymbol(String),     // Push symbol literal
[INFO] [stdout] 13 +     PushSymbol(()),     // Push symbol literal
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:14:14
[INFO] [stdout]    |
[INFO] [stdout] 14 |     PushChar(u8),           // Push character literal
[INFO] [stdout]    |     -------- ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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 -     PushChar(u8),           // Push character literal
[INFO] [stdout] 14 +     PushChar(()),           // Push character literal
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |     LoadVar(String),        // Push variable value
[INFO] [stdout]    |     ------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 21 -     LoadVar(String),        // Push variable value
[INFO] [stdout] 21 +     LoadVar(()),        // Push variable value
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:22:14
[INFO] [stdout]    |
[INFO] [stdout] 22 |     StoreVar(String),       // Pop and store to variable
[INFO] [stdout]    |     -------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 22 -     StoreVar(String),       // Pop and store to variable
[INFO] [stdout] 22 +     StoreVar(()),       // Pop and store to variable
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:25:15
[INFO] [stdout]    |
[INFO] [stdout] 25 |     SendUnary(String),      // Send unary message (pop receiver, push result)
[INFO] [stdout]    |     --------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 25 -     SendUnary(String),      // Send unary message (pop receiver, push result)
[INFO] [stdout] 25 +     SendUnary(()),      // Send unary message (pop receiver, push result)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:26:16
[INFO] [stdout]    |
[INFO] [stdout] 26 |     SendBinary(String),     // Send binary message (pop arg, pop receiver, push result)
[INFO] [stdout]    |     ---------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 26 -     SendBinary(String),     // Send binary message (pop arg, pop receiver, push result)
[INFO] [stdout] 26 +     SendBinary(()),     // Send binary message (pop arg, pop receiver, push result)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/compiler.rs:27:17
[INFO] [stdout]    |
[INFO] [stdout] 27 |     SendKeyword(String, u8),// Send keyword message (name, arg count)
[INFO] [stdout]    |     ----------- ^^^^^^  ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 27 -     SendKeyword(String, u8),// Send keyword message (name, arg count)
[INFO] [stdout] 27 +     SendKeyword((), ()),// Send keyword message (name, arg count)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:30:15
[INFO] [stdout]    |
[INFO] [stdout] 30 |     MakeBlock(u16),         // Create block, arg is bytecode offset to block end
[INFO] [stdout]    |     --------- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 30 -     MakeBlock(u16),         // Create block, arg is bytecode offset to block end
[INFO] [stdout] 30 +     MakeBlock(()),         // Create block, arg is bytecode offset to block end
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:31:14
[INFO] [stdout]    |
[INFO] [stdout] 31 |     BlockArg(u8),           // Load block argument by index
[INFO] [stdout]    |     -------- ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 31 -     BlockArg(u8),           // Load block argument by index
[INFO] [stdout] 31 +     BlockArg(()),           // Load block argument by index
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Jump`, `JumpIfFalse`, and `JumpIfTrue` are never constructed
[INFO] [stdout]   --> src/compiler.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | pub enum Bytecode {
[INFO] [stdout]    |          -------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 59 |     Jump(i16),              // Unconditional jump
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 60 |     JumpIfFalse(i16),       // Jump if top of stack is false
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 61 |     JumpIfTrue(i16),        // Jump if top of stack is true
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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: methods `add_string` and `add_symbol` are never used
[INFO] [stdout]    --> src/compiler.rs:97:8
[INFO] [stdout]     |
[INFO] [stdout]  82 | impl Compiler {
[INFO] [stdout]     | ------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  97 |     fn add_string(&mut self, s: String) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |     fn add_symbol(&mut self, s: String) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CALL_STACK` is never used
[INFO] [stdout]   --> src/codegen.rs:20:7
[INFO] [stdout]    |
[INFO] [stdout] 20 | const CALL_STACK: u16 = 0x8200;     // Return address stack
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LOCALS` is never used
[INFO] [stdout]   --> src/codegen.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const LOCALS: u16 = 0x8300;         // Local variables
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BLOCK_ARGS` is never used
[INFO] [stdout]   --> src/codegen.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | const BLOCK_ARGS: u16 = 0x8400;     // Block argument storage
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_SYMBOL` is never used
[INFO] [stdout]   --> src/codegen.rs:36:7
[INFO] [stdout]    |
[INFO] [stdout] 36 | const TAG_SYMBOL: u8 = 0x03;        // Symbol (tag + len + bytes)
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_TRUE` is never used
[INFO] [stdout]   --> src/codegen.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 | const TAG_TRUE: u8 = 0x04;          // true singleton
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_FALSE` is never used
[INFO] [stdout]   --> src/codegen.rs:38:7
[INFO] [stdout]    |
[INFO] [stdout] 38 | const TAG_FALSE: u8 = 0x05;         // false singleton
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_NIL` is never used
[INFO] [stdout]   --> src/codegen.rs:39:7
[INFO] [stdout]    |
[INFO] [stdout] 39 | const TAG_NIL: u8 = 0x06;           // nil singleton
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_BLOCK` is never used
[INFO] [stdout]   --> src/codegen.rs:40:7
[INFO] [stdout]    |
[INFO] [stdout] 40 | const TAG_BLOCK: u8 = 0x07;         // Block (tag + bytecode offset)
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_CHAR` is never used
[INFO] [stdout]   --> src/codegen.rs:41:7
[INFO] [stdout]    |
[INFO] [stdout] 41 | const TAG_CHAR: u8 = 0x08;          // Character (tag + byte)
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:13:16
[INFO] [stdout]    |
[INFO] [stdout] 13 |     PushSymbol(String),     // Push symbol literal
[INFO] [stdout]    |     ---------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 13 -     PushSymbol(String),     // Push symbol literal
[INFO] [stdout] 13 +     PushSymbol(()),     // Push symbol literal
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:14:14
[INFO] [stdout]    |
[INFO] [stdout] 14 |     PushChar(u8),           // Push character literal
[INFO] [stdout]    |     -------- ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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 -     PushChar(u8),           // Push character literal
[INFO] [stdout] 14 +     PushChar(()),           // Push character literal
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |     LoadVar(String),        // Push variable value
[INFO] [stdout]    |     ------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 21 -     LoadVar(String),        // Push variable value
[INFO] [stdout] 21 +     LoadVar(()),        // Push variable value
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:22:14
[INFO] [stdout]    |
[INFO] [stdout] 22 |     StoreVar(String),       // Pop and store to variable
[INFO] [stdout]    |     -------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 22 -     StoreVar(String),       // Pop and store to variable
[INFO] [stdout] 22 +     StoreVar(()),       // Pop and store to variable
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:25:15
[INFO] [stdout]    |
[INFO] [stdout] 25 |     SendUnary(String),      // Send unary message (pop receiver, push result)
[INFO] [stdout]    |     --------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 25 -     SendUnary(String),      // Send unary message (pop receiver, push result)
[INFO] [stdout] 25 +     SendUnary(()),      // Send unary message (pop receiver, push result)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:26:16
[INFO] [stdout]    |
[INFO] [stdout] 26 |     SendBinary(String),     // Send binary message (pop arg, pop receiver, push result)
[INFO] [stdout]    |     ---------- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 26 -     SendBinary(String),     // Send binary message (pop arg, pop receiver, push result)
[INFO] [stdout] 26 +     SendBinary(()),     // Send binary message (pop arg, pop receiver, push result)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> src/compiler.rs:27:17
[INFO] [stdout]    |
[INFO] [stdout] 27 |     SendKeyword(String, u8),// Send keyword message (name, arg count)
[INFO] [stdout]    |     ----------- ^^^^^^  ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 27 -     SendKeyword(String, u8),// Send keyword message (name, arg count)
[INFO] [stdout] 27 +     SendKeyword((), ()),// Send keyword message (name, arg count)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:30:15
[INFO] [stdout]    |
[INFO] [stdout] 30 |     MakeBlock(u16),         // Create block, arg is bytecode offset to block end
[INFO] [stdout]    |     --------- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 30 -     MakeBlock(u16),         // Create block, arg is bytecode offset to block end
[INFO] [stdout] 30 +     MakeBlock(()),         // Create block, arg is bytecode offset to block end
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/compiler.rs:31:14
[INFO] [stdout]    |
[INFO] [stdout] 31 |     BlockArg(u8),           // Load block argument by index
[INFO] [stdout]    |     -------- ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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] 31 -     BlockArg(u8),           // Load block argument by index
[INFO] [stdout] 31 +     BlockArg(()),           // Load block argument by index
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Jump`, `JumpIfFalse`, and `JumpIfTrue` are never constructed
[INFO] [stdout]   --> src/compiler.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | pub enum Bytecode {
[INFO] [stdout]    |          -------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 59 |     Jump(i16),              // Unconditional jump
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 60 |     JumpIfFalse(i16),       // Jump if top of stack is false
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 61 |     JumpIfTrue(i16),        // Jump if top of stack is true
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Bytecode` 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: methods `add_string` and `add_symbol` are never used
[INFO] [stdout]    --> src/compiler.rs:97:8
[INFO] [stdout]     |
[INFO] [stdout]  82 | impl Compiler {
[INFO] [stdout]     | ------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  97 |     fn add_string(&mut self, s: String) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |     fn add_symbol(&mut self, s: String) -> usize {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CALL_STACK` is never used
[INFO] [stdout]   --> src/codegen.rs:20:7
[INFO] [stdout]    |
[INFO] [stdout] 20 | const CALL_STACK: u16 = 0x8200;     // Return address stack
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LOCALS` is never used
[INFO] [stdout]   --> src/codegen.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 | const LOCALS: u16 = 0x8300;         // Local variables
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BLOCK_ARGS` is never used
[INFO] [stdout]   --> src/codegen.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | const BLOCK_ARGS: u16 = 0x8400;     // Block argument storage
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_SYMBOL` is never used
[INFO] [stdout]   --> src/codegen.rs:36:7
[INFO] [stdout]    |
[INFO] [stdout] 36 | const TAG_SYMBOL: u8 = 0x03;        // Symbol (tag + len + bytes)
[INFO] [stdout]    |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_TRUE` is never used
[INFO] [stdout]   --> src/codegen.rs:37:7
[INFO] [stdout]    |
[INFO] [stdout] 37 | const TAG_TRUE: u8 = 0x04;          // true singleton
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_FALSE` is never used
[INFO] [stdout]   --> src/codegen.rs:38:7
[INFO] [stdout]    |
[INFO] [stdout] 38 | const TAG_FALSE: u8 = 0x05;         // false singleton
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_NIL` is never used
[INFO] [stdout]   --> src/codegen.rs:39:7
[INFO] [stdout]    |
[INFO] [stdout] 39 | const TAG_NIL: u8 = 0x06;           // nil singleton
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_BLOCK` is never used
[INFO] [stdout]   --> src/codegen.rs:40:7
[INFO] [stdout]    |
[INFO] [stdout] 40 | const TAG_BLOCK: u8 = 0x07;         // Block (tag + bytecode offset)
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `TAG_CHAR` is never used
[INFO] [stdout]   --> src/codegen.rs:41:7
[INFO] [stdout]    |
[INFO] [stdout] 41 | const TAG_CHAR: u8 = 0x08;          // Character (tag + byte)
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "939ee746ca7bc78b29b7cf7a55df6dc84fd544a35d9390b87f5a157906e5b10c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "939ee746ca7bc78b29b7cf7a55df6dc84fd544a35d9390b87f5a157906e5b10c", kill_on_drop: false }`
[INFO] [stdout] 939ee746ca7bc78b29b7cf7a55df6dc84fd544a35d9390b87f5a157906e5b10c