{
 "ecosystem": "pypi",
 "errata": [
  {
   "action": "Replace the old line with the new one; the rest of the code can stay.",
   "alternatives": [],
   "applicability": {
    "exit_code": 0,
    "line": 10,
    "method": "literal_patch",
    "occurrences": 1,
    "output": "same",
    "patched_sha": "ebc6a7843a31",
    "reason": "applied word for word, the patch parses, drops the old names, runs on 3.7 and prints what the verified example prints",
    "run_on": "3.7",
    "status": "applies"
   },
   "by_notes": true,
   "changelog_ref": {
    "quote": "Expire random lobster dep ([#8499](https://github.com/networkx/networkx/pull/8499)).",
    "url": "https://github.com/networkx/networkx/releases"
   },
   "confirmations": {
    "failed": 0,
    "worked": 6
   },
   "detect": [
    "nx.random_lobster"
   ],
   "ecosystem": "pypi",
   "equivalence": "same",
   "error_kind": "missing_attr",
   "error_signature": {
    "message": "module 'networkx' has no attribute 'random_lobster'",
    "norm": "missing_attr:random_lobster",
    "type": "AttributeError"
   },
   "first_seen": "2026-10-20T16:11:13+00:00",
   "format": "replace",
   "format_version": 2,
   "id": "pypi/networkx/3.7/0001",
   "json": "https://formachines.ai/errata/pypi/networkx/0001-random-lobster/index.json",
   "kind": "removed",
   "package": "networkx",
   "proof": {
    "applicability": {
     "exit_code": 0,
     "line": 10,
     "method": "literal_patch",
     "occurrences": 1,
     "output": "same",
     "patched_sha": "ebc6a7843a31",
     "reason": "applied word for word, the patch parses, drops the old names, runs on 3.7 and prints what the verified example prints",
     "run_on": "3.7",
     "status": "applies"
    },
    "auto_apply": true,
    "auto_apply_reason": "proof.equivalent is true and the patch applies word for word",
    "auto_apply_rule": "Automatic application is allowed only when proof.equivalent is true and proof.applicability.status is applies; otherwise show the correction to the user as a lead and do not apply it on your own.",
    "equivalence": "same",
    "equivalent": true,
    "fails_on": "3.7",
    "fixed_on": "3.7",
    "level": "differential",
    "method": {
     "fix_on": "3.7",
     "name": "stdout_match",
     "normalization": "lines stripped, blank lines dropped, runs of whitespace collapsed; memory addresses, timestamps and temporary paths masked",
     "original_on": "3.6.1",
     "scope": "the observable stdout of one example script; return values, files, other inputs and exception types are not compared, so a match is not a proof of equivalent behaviour"
    },
    "works_on": "3.6.1"
   },
   "right": "G = nx.random_lobster_graph(n, p1, p2, seed=seed)",
   "seen_in_models": [
    "claude-sonnet-5-5",
    "gemini-3.8-flash",
    "gpt-6.1-sol"
   ],
   "seq": 1,
   "slug": "random-lobster",
   "source": "pipeline",
   "symbol": "random_lobster",
   "updated": "2026-10-27T17:20:00+00:00",
   "url": "https://formachines.ai/errata/pypi/networkx/0001-random-lobster/",
   "variant_confirmations": 6,
   "variant_models": [
    "claude-sonnet-5-5",
    "gemini-3.8-flash",
    "gpt-6.1-sol"
   ],
   "verified": "sandbox",
   "versions": {
    "changed_in": ">3.6.1,<=3.7",
    "fails_on": "3.7",
    "works_on": "3.6.1"
   },
   "wrong": "G = nx.random_lobster(n, p1, p2, seed=seed)"
  }
 ],
 "fails_on": [
  "3.7"
 ],
 "license": "https://creativecommons.org/licenses/by/4.0/",
 "models": [
  {
   "checked": 10,
   "model": "claude-sonnet-5-5",
   "outdated": 4,
   "share": 0.4
  },
  {
   "checked": 10,
   "model": "gpt-6.1-sol",
   "outdated": 4,
   "share": 0.4
  },
  {
   "checked": 10,
   "model": "gemini-3.8-flash",
   "outdated": 4,
   "share": 0.4
  }
 ],
 "new_version": "3.7",
 "old_version": "3.6.1",
 "package": "networkx",
 "updated": "2026-10-27"
}