hakorune/docs/development/issues/arraybox_invalid_args.md

ArrayBox get/set -> Invalid arguments (plugin side)

Status: open

Summary

• Error messages observed during AOT/LLVM smoke that touches ArrayBox:
  • "Plugin invoke error: ArrayBox.set -> Invalid arguments"
  • "Plugin invoke error: ArrayBox.get -> Invalid arguments"
• VInvoke(MapBox) path is stable; issue is isolated to ArrayBox plugin invocation.

Environment

• LLVM 18 / inkwell 0.5.0 (llvm18-0)
• nyash-rust with Phase 11.2 lowering
• tools/llvm_smoke.sh (Array smoke is gated via NYASH_LLVM_ARRAY_SMOKE=1)

Repro

1. Enable array smoke explicitly:
   • NYASH_LLVM_ARRAY_SMOKE=1 ./tools/llvm_smoke.sh release
2. Observe plugin-side errors for ArrayBox.get/set.

Expected

• Array get/set should be routed to NyRT safety shims (nyash_array_get_h/set_h) with handle + index/value semantics that match the core VM.

Observed

• Plugin path is taken for ArrayBox.get/set and the plugin rejects arguments as invalid.

Notes / Hypothesis

• LLVM lowering is intended to map ArrayBox.get/set to NyRT shims. The plugin path should not be engaged for array core operations.
• If by-name fallback occurs (NYASH_LLVM_ALLOW_BY_NAME=1), the array methods might route to plugin-by-name with i64-only ABI and mismatched TLV types (index/value encoding).

Plan

1. Confirm lowering branch for BoxCall(ArrayBox.get/set) always selects NyRT shims under LLVM, regardless of by-name flag.
2. If by-name fallback is unavoidable in current scenario, ensure integer index/value are encoded/tagged correctly (tag=3 for i64) and receiver is a handle.
3. Add a targeted smoke (OFF by default) that calls only get/set/length and prints deterministic result.
4. Optional: Add debug env NYASH_PLUGIN_TLV_DUMP=1 to print decoded TLV for failing invokes to speed diagnosis.

Workarounds

• Keep NYASH_LLVM_ARRAY_SMOKE=0 in CI until fixed.