# Test Failures — Iteration 6e7f378b

## Summary
**ALL TESTS PASSED** ✅

Total: 308 tests
- Passed: 308
- Failed: 0
- Ignored: 0

## Test Execution Results

### Full Test Suite
```
running 308 tests
test result: ok. 308 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
```

### Compiler Module Tests
```
running 41 tests
test result: ok. 41 passed; 0 failed; 0 ignored; 0 measured; 267 filtered out
```

### Function-Related Compiler Tests
Total function-specific compiler tests: **22 tests** (exceeds requirement of 10)

#### Test Categories:

**Function Definition Tests (13 tests):**
1. test_compile_function_def_no_params
2. test_compile_function_def_with_params
3. test_compile_function_metadata_tracking ✨ NEW
4. test_compile_function_register_allocation
5. test_compile_function_scope_isolation
6. test_compile_function_with_complex_body
7. test_compile_function_with_many_params ✨ NEW
8. test_compile_function_without_explicit_return ✨ NEW
9. test_compile_function_body_metadata_offsets ✨ NEW
10. test_compile_function_call_in_assignment ✨ NEW
11. test_compile_multiple_functions
12. test_compile_nested_call
13. test_compile_recursive_function_call ✨ NEW

**Function Call Tests (7 tests):**
1. test_compile_function_call_no_args
2. test_compile_function_call_with_args
3. test_compile_function_call_with_expression_args
4. test_compile_call_tracks_argument_registers
5. test_compile_call_no_args_first_arg_reg
6. test_compile_call_argument_consecutive_registers ✨ NEW
7. test_compile_nested_calls_register_tracking

**Return Statement Tests (2 tests):**
1. test_compile_return_with_value
2. test_compile_return_without_value

## Acceptance Criteria Coverage

### AC1: FunctionDef → DefineFunction with Metadata ✅
**Status**: FULLY COVERED
**Tests**:
- test_compile_function_def_no_params
- test_compile_function_def_with_params
- test_compile_function_metadata_tracking (validates metadata storage)
- test_compile_function_body_metadata_offsets (validates body_start/body_len)

**Validation**:
- DefineFunction instruction emitted with correct name_index
- param_count matches function signature
- body_start and body_len correctly reference function body
- Metadata tracked separately in compiler

### AC2: Call → Call Instruction with Argument Setup ✅
**Status**: FULLY COVERED
**Tests**:
- test_compile_function_call_no_args
- test_compile_function_call_with_args
- test_compile_call_tracks_argument_registers (validates first_arg_reg)
- test_compile_call_argument_consecutive_registers (validates consecutive registers)
- test_compile_nested_calls_register_tracking

**Validation**:
- Call instruction emitted with correct name_index
- arg_count matches number of arguments
- first_arg_reg points to first argument register
- Arguments compiled into consecutive registers
- dest_reg allocated for return value

### AC3: Return → Return Instruction ✅
**Status**: FULLY COVERED
**Tests**:
- test_compile_return_with_value (has_value=true, src_reg=Some(r))
- test_compile_return_without_value (has_value=false, src_reg=None)

**Validation**:
- Return with value: has_value=true, src_reg contains value
- Return without value: has_value=false, src_reg=None

### AC4: Function Metadata Tracked Separately ✅
**Status**: FULLY COVERED
**Tests**:
- test_compile_function_metadata_tracking (explicitly validates metadata storage)
- test_compile_multiple_functions (validates separate tracking)

**Validation**:
- Compiler maintains functions HashMap
- Function metadata includes body_start, body_len, param_count
- Multiple functions tracked independently
- DefineFunction instructions reference correct metadata

### AC5: Register Allocation for Args/Returns ✅
**Status**: FULLY COVERED
**Tests**:
- test_compile_function_register_allocation (validates param registers)
- test_compile_call_tracks_argument_registers (validates arg registers)
- test_compile_call_argument_consecutive_registers (validates consecutive allocation)
- test_compile_nested_calls_register_tracking (validates complex scenarios)

**Validation**:
- Function parameters use registers 0..param_count
- Call arguments compiled into consecutive registers
- first_arg_reg correctly tracks argument location
- dest_reg allocated for return value
- Register allocation resets for function scope

### AC6: Regression Check - All Existing Tests Pass ✅
**Status**: PASSED
**Tests**: 308 total tests (301 original + 7 new edge case tests)

**Validation**:
- All pre-existing compiler tests pass (18 legacy tests)
- All bytecode tests pass (including 10 new function instruction tests)
- All AST tests pass (including 20 new function node tests)
- All VM tests pass
- All integration tests pass
- No regressions detected

### AC7: At Least 10 New Compiler Tests ✅
**Status**: EXCEEDED REQUIREMENT (22 function-specific tests)

**Original function tests**: 15
**New edge case tests added**: 7
- test_compile_function_metadata_tracking
- test_compile_function_without_explicit_return
- test_compile_call_argument_consecutive_registers
- test_compile_function_with_many_params
- test_compile_recursive_function_call
- test_compile_function_call_in_assignment
- test_compile_function_body_metadata_offsets

**Total**: 22 function-related compiler tests

## Edge Cases Tested

### Register Allocation
✅ Consecutive argument registers
✅ Complex nested calls with multiple register allocations
✅ Function with 20 parameters
✅ Return value register allocation

### Function Metadata
✅ Multiple function definitions
✅ body_start and body_len offsets
✅ Separate function metadata tracking
✅ Function name deduplication in var_names pool

### Special Cases
✅ Function without explicit return
✅ Recursive function calls (self-referential)
✅ Function calls in assignments (no SetResult)
✅ Nested function calls
✅ Function calls with expression arguments

## Warnings

Minor compiler warnings present (non-blocking):
```
warning: unused variable: `body_start`
warning: unused variable: `body` (in parser.rs)
```

These warnings are in test code for fields that are validated by pattern matching but not used in the test logic. They do not affect functionality.

## Conclusion

**ALL ACCEPTANCE CRITERIA MET** ✅

The compiler successfully:
1. Compiles FunctionDef to DefineFunction with correct metadata
2. Compiles Call expressions to Call instructions with argument register tracking
3. Compiles Return statements (with and without values)
4. Tracks function definitions separately from main code
5. Allocates registers for arguments and return values
6. Maintains backward compatibility (all 301 existing tests pass)
7. Includes 22 function-specific compiler tests (exceeds 10 requirement)

No test failures detected. The implementation is complete and comprehensive.
