MutaFix run: boltons-010

ranker nvidia/NVIDIA-Nemotron-3-Nano-30B-A3B · patcher nvidia/nemotron-3-super-120b-a12b · via Nebius Token Factory

fixedoutcome
10swall time
2model calls
$0.0005API cost
Benchmark ground truth (hidden from the agent)
boltons/urlutils.py:810 · operator CMP · function boltons/urlutils.py::URL.__ne__
- return not self != other   (injected bug)+ return not self == other   (original)
retriever rank 1 of 20 · ranker position 1 · patched the right function yes · exact restore yes

Trace

reproduce
+3.01s
2 failing test(s) · 2 failed, 523 passed · 3.01s
failing tests and errors
tests/test_urlutils.py::test_not_equal
tests/test_urlutils.py::test_normalize_with_case
tests/test_urlutils.py::test_not_equal
E   RecursionError: maximum recursion depth exceeded
tests/test_urlutils.py::test_normalize_with_case
E   RecursionError: maximum recursion depth exceeded
trace
+3.57s
re-ran 1 test file(s) with the trace plugin: 2 failing and 125 passing tests, 6 library functions ran in a failing test · 0.43s
tests/test_urlutils.py
retrieve
+3.58s
923 functions indexed, 73 reachable from tests/test_urlutils.py::test_not_equal in the static call graph. Kept 20 candidates, ranked by spectrum score (Ochiai), call graph and BM25 break ties.
candidates in retriever order
  1. boltons/urlutils.py::URL.__ne__ call depth 1 · Ochiai 1.00 (failing 2, passing 0)
  2. boltons/urlutils.py::unquote_to_bytes call depth 3 · Ochiai 0.16 (failing 1, passing 18)
  3. boltons/urlutils.py::URL.__init__ call depth 1 · Ochiai 0.15 (failing 2, passing 91)
  4. boltons/urlutils.py::parse_host call depth 3 · Ochiai 0.15 (failing 2, passing 91)
  5. boltons/urlutils.py::parse_url call depth 2 · Ochiai 0.15 (failing 2, passing 92)
  6. boltons/urlutils.py::unquote call depth 2 · Ochiai 0.11 (failing 1, passing 41)
  7. boltons/urlutils.py::URL.__repr__ call depth 1 · Ochiai 0.00 (failing 0, passing 0)
  8. boltons/urlutils.py::URL.__str__ call depth 1 · Ochiai 0.00 (failing 0, passing 1)
  9. boltons/urlutils.py::URL.__unicode__ call depth 1 · Ochiai 0.00 (failing 0, passing 0)
  10. boltons/urlutils.py::URL.__eq__ call depth 1 · Ochiai 0.00 (failing 0, passing 3)
  11. boltons/urlutils.py::URL.to_text call depth 2 · Ochiai 0.00 (failing 0, passing 53)
  12. boltons/urlutils.py::QueryParamDict.to_text call depth 2 · Ochiai 0.00 (failing 0, passing 65)
  13. boltons/iterutils.py::split call depth 2 · Ochiai 0.00 (failing 0, passing 0)
  14. boltons/socketutils.py::BufferedSocket.family call depth 2 · Ochiai 0.00 (failing 0, passing 0)
  15. boltons/tableutils.py::to_text call depth 2 · Ochiai 0.00 (failing 0, passing 0)
  16. boltons/tableutils.py::Table.to_text call depth 2 · Ochiai 0.00 (failing 0, passing 0)
  17. boltons/urlutils.py::URL.query_params call depth 3 · Ochiai 0.00 (failing 0, passing 87)
  18. boltons/urlutils.py::URL.uses_netloc call depth 3 · Ochiai 0.00 (failing 0, passing 11)
  19. boltons/urlutils.py::URL.path call depth 3 · Ochiai 0.00 (failing 0, passing 12)
  20. boltons/urlutils.py::quote_path_part call depth 3 · Ochiai 0.00 (failing 0, passing 55)
rank
+3.58s
spectrum order kept (no model call)
  1. boltons/urlutils.py::URL.__ne__
  2. boltons/urlutils.py::unquote_to_bytes
  3. boltons/urlutils.py::URL.__init__
  4. boltons/urlutils.py::parse_host
  5. boltons/urlutils.py::parse_url
read
+4.96s
turn 1 · NVIDIA-Nemotron-3-Nano-30B-A3B · 3804 in / 61 out · 1.39s · $0.00024

read boltons/urlutils.py::URL.__ne__

The __ne__ method is a one-liner that recursively calls self != other, which causes infinite recursion when comparing URL objects. This directly explains the RecursionError in test_not_equal.

patch
+9.56s
turn 2 · NVIDIA-Nemotron-3-Nano-30B-A3B · 3937 in / 101 out · 0.99s · $0.00026

The __ne__ method should return the negation of equality without recursively calling __ne__ again. Using self == other avoids infinite recursion and correctly implements inequality.

--- a/boltons/urlutils.py+++ b/boltons/urlutils.py@@ -808,5 +808,5 @@      def __ne__(self, other):-        return not self != other+        return not (self == other)

tests: all tests pass 525 passed

Final patch

--- a/boltons/urlutils.py+++ b/boltons/urlutils.py@@ -808,5 +808,5 @@      def __ne__(self, other):-        return not self != other+        return not (self == other)