engineering/java-topology
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
java-topology/defects/peewee/patch/peewee-diamond-recursion-CLEAN.md
russell@unturf.com 3986d8dc50 diamond hunt: godot-0009/0010 + meson-0002 + typeorm-0004/0005 + ts-0003; count 629→635 
New diamond recursion defects (O(2^D) → O(N)):
- godot-0009: Font::_is_cyclic no visited set — CJK fallback diamond, 2648x at F=4,D=8
- godot-0010: Font::_update_rids_fb no visited set — duplicate RIDs + O(N^2) hot path
- meson-0002: get_internal_static_libraries_recurse link_whole guard missing — 132x at D=10
- typescript-0003: hasBaseType inner check() no visited set — 1024x at D=10; hot on instanceof

New O(N²) defects:
- typeorm-0004: SubjectTopologicalSorter Array.indexOf dedup — 200x at N=400
- typeorm-0005: DepGraph.createDFS result.indexOf + addDependency edge dedup — 300x at N=600

CLEAN confirmed (diamond recursion sweep): bazel, cargo, cmake, composer, dgl, diesel,
doctrine-orm, efcore, helm, mybatis, networkx-deeper, ninja, npm-arborist, peewee, pip,
rubygems, seaorm, sqlalchemy, swift

UNDF: 571→578 assigned; MOAD count: 629→635
2026-03-29 16:52:04 -04:00

577 B
Raw Permalink Blame History

peewee diamond recursion scan — CLEAN

Scanned: 2026-03-29 Scope: diamond recursion / CWE-407 in ORM dependency graph traversal

Files checked

  • peewee.py:7395 sort_models() — DFS over model dependency graph using seen set (if model not in seen: seen.add(model)). O(1) visited check per DFS step. Clean.
  • peewee.py:7177 Model.dependencies() — BFS with seen set for backreference traversal. Clean.

Verdict

CLEAN. Both sort_models and dependencies use Python set for O(1) visited tracking. No diamond recursion (unbounded revisiting) pattern.