# Test Failures — Iteration 0746d202

## Summary
✅ **ALL TESTS PASSED** - No failures detected

## Test Execution Results

### Shell Integration Tests
All shell-based integration tests passed successfully:

1. ✅ **test_daemon_lifecycle.sh** - PASSED
   - AC2.1: Daemon starts and forks to background
   - AC2.2: Code execution through daemon returns correct output
   - AC2.3: Daemon shuts down cleanly

2. ✅ **test_daemon_fallback.sh** - PASSED
   - AC2.4: Fallback execution works when daemon is not running
   - Fallback works correctly after daemon lifecycle
   - Direct execution produces correct results

3. ✅ **test_error_propagation.sh** - PASSED
   - AC2.5: Error messages are identical for daemon vs direct execution
   - Division by zero errors match
   - Undefined variable errors match
   - Syntax errors match
   - Exit codes match for errors

4. ✅ **test_daemon_edge_cases.sh** - PASSED
   - Double daemon start prevented
   - Stop daemon when not running handled
   - Empty code execution handled
   - Stale socket file handled with fallback
   - Complex errors propagate correctly
   - Daemon status command works
   - Multiple rapid requests handled

5. ✅ **test_daemon_race_condition.sh** - PASSED (NEW)
   - Parent waits for child to be ready before exiting
   - Socket is available immediately after daemon start
   - Multiple rapid cycles work reliably
   - Pipe-based synchronization prevents race conditions

### Acceptance Criteria Validation

| Criterion | Status | Test Coverage |
|-----------|--------|--------------|
| AC2.1: pyrust --daemon forks background process and exits parent | ✅ PASS | test_daemon_lifecycle.sh, test_daemon_edge_cases.sh, test_daemon_race_condition.sh |
| AC2.2: pyrust -c '2+3' with daemon returns correct output | ✅ PASS | test_daemon_lifecycle.sh, test_daemon_edge_cases.sh |
| AC2.3: pyrust --stop-daemon shuts down cleanly | ✅ PASS | test_daemon_lifecycle.sh, test_daemon_edge_cases.sh |
| AC2.4: Fallback works when daemon not running | ✅ PASS | test_daemon_fallback.sh, test_daemon_edge_cases.sh |
| AC2.5: Error messages identical for daemon vs direct execution | ✅ PASS | test_error_propagation.sh, test_daemon_edge_cases.sh |

## Code Quality Issues

### Minor Warnings (Non-blocking)
The following compiler warnings were observed but do not affect functionality:

1. **Unused struct field**: `FunctionMetadata.body_len` in `src/vm.rs:97`
   - Impact: None (unused field in function metadata)
   - Severity: Low
   - Action: Can be removed in future cleanup

2. **Unused method**: `VM::clear_register_valid` in `src/vm.rs:191`
   - Impact: None (dead code)
   - Severity: Low
   - Action: Can be removed in future cleanup

These warnings do not affect the daemon CLI integration functionality.

## Edge Cases Tested

All critical edge cases have been tested and validated:

1. ✅ Race condition in daemon startup (parent exits before child ready) - FIXED via pipe synchronization
2. ✅ Error reporting before daemon detachment - FIXED via early initialization
3. ✅ Empty/whitespace input handling
4. ✅ Stale socket file handling with fallback
5. ✅ Multiple rapid requests
6. ✅ Duplicate daemon start prevention
7. ✅ Error message consistency between daemon and direct execution
8. ✅ Complex error scenarios (division by zero, undefined variables, syntax errors)

## Performance Validation

While not explicitly part of the ACs, the tests implicitly validate:
- Daemon responds quickly to requests (< 1 second per request)
- Multiple rapid requests handled successfully (10 sequential requests)
- Daemon startup completes within 300ms
- Clean shutdown within 200ms

## Conclusion

**ALL ACCEPTANCE CRITERIA (AC2.1 - AC2.5) ARE FULLY SATISFIED**

The coder's implementation successfully:
1. Fixed the race condition using pipe-based parent-child synchronization
2. Fixed lost error handling by initializing DaemonServer before closing stderr
3. Implements all daemon lifecycle operations correctly
4. Provides seamless fallback to direct execution
5. Maintains error message consistency across execution modes

**Test Coverage**: 100% of acceptance criteria
**Test Pass Rate**: 100% (0 failures)
**Quality**: Production-ready
