980965afc8
Completes Phase 218 investigation: Identifies root cause preventing AST-based if-sum lowerer from activating. ## Investigation Summary ### Test Case Created - File: apps/tests/phase218_json_if_sum_min.hako - Pattern: JsonParser-style conditional accumulation (sum = sum + i) - Expected: RC=10, Actual: RC=0 (blocked by phantom carrier) ### Root Cause Identified: Phantom Carrier Bug **Problem**: AST-based if-sum lowerer (Phase 213) never activates **Cause Chain**: 1. loop_update_summary.rs uses name-based heuristics 2. Detects phantom "count" variable (doesn't exist in code) 3. counter_count() returns 2 instead of 1 (i + phantom "count") 4. is_simple_if_sum_pattern() returns false 5. Dual-mode dispatch uses legacy fallback instead of AST lowerer **Evidence**: ``` Debug output shows hardcoded template "i % 2 == 1" (legacy lowerer) Not from AST extraction (AST-based lowerer never called) ``` ### Critical Discovery **Phase 216 claim "RC=2 ✅" for phase212_if_sum_min.hako is false** - Current execution: RC=0 (wrong) - Expected: RC=2 - Indicates: Phase 213-217 "success" was actually legacy lowerer ### Documentation Gap Phase 216/217 tests may not have been executed correctly, or regression occurred. All "if-sum" patterns are currently broken due to phantom carrier detection blocking AST lowerer activation. ## Files Created 1. apps/tests/phase218_json_if_sum_min.hako - Test case 2. docs/development/current/main/phase218-jsonparser-if-sum-min.md - Investigation report ## Files Updated 1. CURRENT_TASK.md - Phase 218 investigation results 2. joinir-architecture-overview.md - Phase 218 entry ## Next Steps: Phase 219 **Target**: Fix phantom carrier detection in loop_update_summary.rs **Fix**: Remove name-based heuristics, use assignment-based detection only **Expected Result**: Both phase212 and phase218 tests pass with correct RC ## Lessons Learned 1. Documentation can become stale - verify test results 2. Silent fallbacks hide bugs - dual-mode needs clear activation logging 3. Name heuristics are fragile - prefer structural analysis 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Nyash Development Documentation 🔧
開発者向けの進行中タスクと開発計画ドキュメントです。
📂 ディレクトリ構造
current/
CURRENT_TASK.md- 現在進行中のタスク- アクティブな開発作業の詳細
- 最新の実装状況
roadmap/
- phases/ - フェーズ別開発計画
- phase-8/ - AST→MIR変換
- phase-9/ - VM/JIT実装
- phase-10/ - AOT最適化
- native-plan/ - ネイティブビルド計画
- 実行バックエンド統合
- パフォーマンス目標
proposals/
- RFC（Request for Comments）
- 新機能提案
- 設計ディスカッション
🎯 重要な参照先
- 進行状況:
current/CURRENT_TASK.md - 開発計画:
roadmap/phases/ - 技術提案:
proposals/
📝 注意事項
このディレクトリの内容は開発中であり、頻繁に変更されます。
安定した仕様はreference/を参照してください。