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Section 05: Verification & Cleanup

Status: Complete Goal: Final verification pass. All tests green, all code journeys re-run, documentation updated.

Depends on: Section 04 (test matrix must pass first).

05.1 Verify Test Stability

File: compiler/ori_llvm/tests/aot/fat_ptr_iter/ (directory module after Section 04.0 split)

Run each test 10 times to verify no intermittent failures. All tests listed below were added or fixed during Sections 02-04 and must demonstrate stability before this plan is closed.

  • test_str_list_passed_to_two_functions — 10 consecutive passes (the original motivating double-free bug)
  • test_nested_list_iteration — 10 consecutive passes (intermittent double-free in nested [[int]])
  • test_str_split_in_tuple_list — 10 consecutive passes (F0 semantic pin: slice-string in tuple, added Section 04)
  • test_main_args_with_heap_strings — 10 consecutive passes (F14 heap-string args, fixed by BUG-04-003/TPR-04-017)
  • Run timeout 150 cargo test -p ori_llvm --test aot -- fat_ptr_iter --test-threads=1 — all 130 fat_ptr_iter tests pass sequentially (BUG-04-002: concurrent AOT compilation can cause SIGSEGV)

05.2 Full Test Suite

  • timeout 150 ./test-all.sh — all 13,622 tests pass, 0 failures
  • ./clippy-all.sh — zero warnings (fixed clippy match arm merge in protocol/mod.rs)
  • ./fmt-all.sh — no formatting changes
  • cargo b --release — release build succeeds
  • timeout 150 cargo test -p ori_llvm --test aot --release — all 1,925 AOT tests pass in release mode (FastISel behavior differs between debug/release)
  • diagnostics/valgrind-aot.sh — 89/89 pass, zero errors (debug binary). BUG FOUND AND FIXED: propagate_elem_header/propagate_header read elem_dec_fn from slice interior pointers instead of original allocation’s data pointer. Address 0x5 (the elem_count) was stored as a function pointer → SIGSEGV in ori_buffer_rc_dec. Fix: resolve slice via slice_original_data(data, cap) before reading header. Affected: cow.rs, cow_structural.rs, cow_sort/mod.rs, cow_sort/sort.rs.
  • diagnostics/valgrind-aot.sh with release binary — 89/89 pass, zero errors (release binary)
  • diagnostics/valgrind-aot.sh tests/valgrind/fat_ptr_iter/ — 14/14 pass, zero errors (debug binary)
  • Valgrind args_str_list.ori with heap-string arguments: zero errors, zero leaks with args exceeding SSO threshold (36-char strings, release binary)
  • diagnostics/dual-exec-verify.sh — spec tests: 194 verified runtime + 63 compile-fail, zero behavioral mismatches. @main programs: 125 verified, 9 pre-existing mismatches (LLVM codegen gaps: incomplete closure/list/while support in tests/aims/, tests/run-pass/rosetta/; interpreter E6030/E6032 errors for AOT-only features in args_str_list, aims_h_fip_reuse, aims_fip_interprocedural). No NEW mismatches introduced by this plan.
  • ORI_CHECK_LEAKS=1 reports zero leaks on all 14 tests/valgrind/fat_ptr_iter/ programs compiled with release binary

05.3 Code Journeys

Re-run code journeys J15-J17 using the /code-journey skill (via the Skill tool — do NOT manually reimplement). Verify improved scores.

  • Re-run J15 (string list iteration) — eval=18 aot=18 (expected 18), both paths match
  • Re-run J16 (aggregate emission) — eval=42 aot=42 (expected 42), no regressions
  • Re-run J17 (closure capture) — eval=10 aot=10 (expected 10), no regressions
  • Update journey results files with new scores — background agents writing updated results
  • Verify J15 score reflects the header-based cleanup fix — both paths produce correct results (18), confirming the elem_dec_fn header fix works for nested fat pointer collections

05.4 Documentation

CLAUDE.md Memory Updates

  • Update CLAUDE.md memory entry for “Fat Pointer Bugs” — marked RESOLVED, all 3 bugs fixed
  • Add CLAUDE.md memory entry for the RC Header V5 layout change (32 bytes, 4 fields)
  • Add CLAUDE.md memory entry for slice-aware string RC functions — covered in V5 memory entry and COW runtime patterns

Cross-Plan Status Updates

  • Update plans/fat-pointer-hardening/section-01-iterator-ownership.md: body status fixed to “Complete”
  • Update plans/fat-pointer-hardening/index.md: Section 01 entry updated to “Complete”
  • Update plans/rc-integrity/section-02-leak-fixes.md: body status fixed to “Complete”

.claude/rules/runtime.md — Full Update Pass

  • Update .claude/rules/runtime.md: RefCount row updated to V5 32-byte header with 4 fields
  • Add ori_buffer_store_elem_dec and ori_buffer_store_elem_count to Functions table
  • Add ori_str_rc_inc and ori_str_rc_dec to Functions table (Strings category)
  • Update Submodules section: iterator/ directory module with 7 files, ori_iter_from_list 4 params

Design Docs Verification

  • Verify docs/compiler/design/11-runtime/data-structures.md — already correct (V5/32-byte, all 4 fields documented)
  • Verify docs/compiler/design/11-runtime/reference-counting.md — already correct (V5/32-byte, all 4 fields documented)

Stale Plan References

  • Update plans/value-semantics-optimization/section-05-seamless-slices.md: V3→V5, 16→32, all stale references updated
  • Update plans/repr-opt/section-09-arc-header.md: V5 warning added, goal updated, rc_ops! macro limitation noted
  • Update plans/iter-rc-contract/ plan files: historical notes added to all 8 files (index, 00-overview, sections 01-06)
  • Fix plans/iter-rc-contract/index.md: Section 03 entry updated to “Complete”

Spec Update

  • Update docs/ori_lang/v2026/spec/annex-c-built-in-functions.md: str.upper()→str.to_uppercase(), str.lower()→str.to_lowercase()

Section 04 Architecture Changes Documentation

  • Verify ori_str_split 7-parameter ABI — not mentioned in design docs, no update needed
  • Add ProtocolBuiltin documentation to .claude/rules/arc.md — Protocol Builtins subsection added with all 5 variants

Note: clone_rc.rs extraction from derive_codegen/bodies.rs (Section 04 TPR-04-009) does not require a .claude/rules/llvm.md update — llvm.md uses directory-level listing for codegen/derive_codegen/, not individual file enumeration.

Note: compiler/ori_rt/src/rc/mod.rs V5 layout comment (lines 48-64) is already compact and matches the module doc (lines 1-8). No consolidation needed.

05.R Third Party Review Findings

  • [TPR-05-001][medium] plans/iter-rc-contract/00-overview.md:4 — Section 05 claims the stale plans/iter-rc-contract/ references were swept, but the current tree still leaves that plan in contradictory states: the index is status: resolved, while the overview remains status: in-progress, section-01-root-cause.md still says **Status:** Not Started, and Sections 04-06 still say **Status:** In Progress. Resolved: Fixed on 2026-03-22. Updated all iter-rc-contract plan files: overview frontmatter status: complete, section-01/04/05/06 body text aligned to **Status:** Complete.

  • [TPR-05-002][low] compiler/ori_llvm/src/codegen/arc_emitter/context.rs:80 — The new ProtocolBuiltin::Iter / IterDrop follow-up is not fully synchronized across the LLVM emitter. try_emit_protocol() explicitly declines to intercept those variants (apply_protocols.rs:64-69), but the shared is_callee_intercepted() helper still treats every ProtocolBuiltin as intercepted. Current behavior is masked because iter falls through to builtin-method emission and ori_iter_drop is already declared nounwind, but the shared dispatch model and its “single source of truth” comments are now false. Resolved: Fixed on 2026-03-22. Added ProtocolBuiltin::is_intercepted() (returns false for Iter/IterDrop, true for others) and is_nounwind() test coverage. Updated is_callee_intercepted() comment to explain that ALL protocol builtins are nounwind (safe as call), while only some are intercepted by try_emit_protocol(). Updated apply_protocols.rs module doc to distinguish these two concepts.

05.N Completion Checklist

Test Verification

  • Zero #[ignore] tests related to fat pointer iteration — grep returns 0 matches
  • All tests pass (timeout 150 ./test-all.sh) — 13,622 pass, 0 fail
  • All tests pass in release mode — 1,925 AOT tests pass in release
  • Valgrind clean on all tests/valgrind/fat_ptr_iter/ programs — 14/14 debug
  • Valgrind clean on all tests/valgrind/fat_ptr_iter/ programs — 14/14 release (via ORI_COMPILER_BINARY)
  • ORI_CHECK_LEAKS=1 reports zero leaks on all 14 fat_ptr_iter programs (both debug and release)
  • Valgrind clean on args_str_list.ori WITH heap-string arguments (>23 bytes) — zero errors, zero leaks
  • All 130 fat_ptr_iter tests pass sequentially (--test-threads=1)

Code Journeys

  • J15, J16, J17 re-run via /code-journey skill — all pass (J15: eval=18 aot=18, J16: eval=42 aot=42, J17: eval=10 aot=10)

Documentation

  • .claude/rules/runtime.md updated: V5 header, 4 new functions, iterator/ directory
  • Spec naming mismatch resolved: str.upper()→str.to_uppercase(), str.lower()→str.to_lowercase()
  • CLAUDE.md memory entries added/updated (Fat Pointer Bugs RESOLVED, RC Header V5)
  • .claude/rules/arc.md updated with Protocol Builtins subsection

Stale Reference Sweeps

  • No stale “16-byte header” or “24-byte header” in compiler/ or docs/ — zero matches. Plan-internal historical references are acceptable.
  • No stale V3/V4 references in compiler/ori_rt/ or compiler/ori_llvm/ — zero matches
  • __for_coll removed from compiler/ (zero matches); plans/ references annotated as historical
  • elem_dec_fn in iterator sources — only comment reference (line 18), no parameter/field
  • ori_iter_from_list calls in tests — all 4-arg (3 commas per call)

Structural Integrity

  • write_array_to_list exists with callers in set/mod.rs, map/mod.rs, list/mod.rs — all pass correct params
  • ori_rc_alloc in non-test collection code — only lib.rs:315 (args_from_argv), which stores elem_dec_fn via codegen-emitted ori_buffer_store_elem_dec
  • ori_str_split — 7-parameter signature confirmed, not documented in design docs (no update needed)

Plan Status

  • Plan status: active changed to status: resolved in index.md frontmatter
  • plans/fat-pointer-hardening/section-01-iterator-ownership.md body says “Complete”
  • plans/fat-pointer-hardening/index.md Section 01 entry says “Complete”
  • plans/rc-integrity/section-02-leak-fixes.md body says “Complete”
  • plans/iter-rc-contract/index.md Section 03 entry says “Complete”
  • plans/iter-rc-contract/ overview and section body/frontmatter statuses align with the resolved index and completion claims

Sync Integrity

  • ProtocolBuiltin dispatch metadata matches the actual LLVM emission path for every variant (Iter / IterDrop included)