MutaFix run: sortedcontainers-003

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

fixedoutcome
9swall time
2model calls
$0.0006API cost
Benchmark ground truth (hidden from the agent)
src/sortedcontainers/sortedlist.py:1935 · operator NEGCOND · function src/sortedcontainers/sortedlist.py::SortedKeyList.remove
- while not (True):   (injected bug)+ while True:   (original)
retriever rank 1 of 20 · ranker position 1 · patched the right function yes · exact restore yes

Trace

reproduce
+2.02s
10 failing test(s) · 10 failed, 289 passed · 2.02s
failing tests and errors
tests/test_coverage_sortedkeylist_modulo.py::test_remove
tests/test_coverage_sortedkeylist_modulo.py::test_remove_valueerror2
tests/test_coverage_sortedkeylist_modulo.py::test_remove_valueerror3
tests/test_coverage_sortedkeylist_modulo.py::test_remove_valueerror5
tests/test_coverage_sortedkeylist_modulo.py::test_delete
tests/test_coverage_sortedkeylist_negate.py::test_remove
tests/test_coverage_sortedkeylist_negate.py::test_remove_valueerror2
tests/test_coverage_sortedkeylist_negate.py::test_remove_valueerror3
tests/test_coverage_sortedkeylist_negate.py::test_delete
tests/test_stress_sortedkeylist.py::test_stress
tests/test_coverage_sortedkeylist_modulo.py::test_remove
E   assert False
E    +  where False = all(<generator object test_remove.<locals>.<genexpr> at 0x00000272D88F3E00>)
tests/test_coverage_sortedkeylist_modulo.py::test_remove_valueerror2
E   Failed: DID NOT RAISE ValueError
trace
+3.18s
re-ran 3 test file(s) with the trace plugin: 10 failing and 115 passing tests, 13 library functions ran in a failing test · 1.13s
tests/test_coverage_sortedkeylist_modulo.py, tests/test_coverage_sortedkeylist_negate.py, tests/test_stress_sortedkeylist.py
retrieve
+3.18s
129 functions indexed, 47 reachable from tests/test_coverage_sortedkeylist_modulo.py::test_remove in the static call graph. Kept 20 candidates, ranked by spectrum score (Ochiai), call graph and BM25 break ties.
candidates in retriever order
  1. src/sortedcontainers/sortedlist.py::SortedKeyList.remove call depth 1 · Ochiai 0.88 (failing 10, passing 3)
  2. src/sortedcontainers/sortedlist.py::SortedKeyList.discard call depth 1 · Ochiai 0.32 (failing 2, passing 2)
  3. src/sortedcontainers/sortedlist.py::SortedKeyList.update call depth - · Ochiai 0.30 (failing 10, passing 101)
  4. src/sortedcontainers/sortedlist.py::SortedKeyList.__new__ call depth 1 · Ochiai 0.29 (failing 10, passing 112)
  5. src/sortedcontainers/sortedlist.py::SortedKeyList.__init__ call depth 1 · Ochiai 0.29 (failing 10, passing 112)
  6. src/sortedcontainers/sortedlist.py::SortedList.__len__ call depth 3 · Ochiai 0.28 (failing 5, passing 27)
  7. src/sortedcontainers/sortedlist.py::SortedKeyList.__repr__ call depth 1 · Ochiai 0.26 (failing 2, passing 4)
  8. src/sortedcontainers/sortedlist.py::identity call depth - · Ochiai 0.22 (failing 1, passing 1)
  9. src/sortedcontainers/sortedlist.py::SortedList._reset call depth 1 · Ochiai 0.20 (failing 6, passing 80)
  10. src/sortedcontainers/sortedlist.py::SortedKeyList.clear call depth - · Ochiai 0.20 (failing 6, passing 83)
  11. src/sortedcontainers/sortedlist.py::SortedKeyList._check call depth 1 · Ochiai 0.20 (failing 4, passing 36)
  12. src/sortedcontainers/sortedlist.py::SortedList.__iter__ call depth 3 · Ochiai 0.19 (failing 4, passing 39)
  13. src/sortedcontainers/sortedlist.py::SortedList.__getitem__ call depth 3 · Ochiai 0.08 (failing 1, passing 16)
  14. src/sortedcontainers/sorteddict.py::SortedDict._check call depth 1 · Ochiai 0.00 (failing 0, passing 0)
  15. src/sortedcontainers/sortedset.py::SortedSet._check call depth 1 · Ochiai 0.00 (failing 0, passing 0)
  16. src/sortedcontainers/sortedset.py::SortedSet.discard call depth 1 · Ochiai 0.00 (failing 0, passing 0)
  17. src/sortedcontainers/sortedlist.py::SortedList.discard call depth 1 · Ochiai 0.00 (failing 0, passing 0)
  18. src/sortedcontainers/sortedlist.py::SortedList._check call depth 1 · Ochiai 0.00 (failing 0, passing 0)
  19. src/sortedcontainers/sortedlist.py::SortedKeyList.__add__ call depth 1 · Ochiai 0.00 (failing 0, passing 2)
  20. src/sortedcontainers/sortedlist.py::SortedKeyList.__contains__ call depth 1 · Ochiai 0.00 (failing 0, passing 4)
rank
+3.18s
spectrum order kept (no model call)
  1. src/sortedcontainers/sortedlist.py::SortedKeyList.remove
  2. src/sortedcontainers/sortedlist.py::SortedKeyList.discard
  3. src/sortedcontainers/sortedlist.py::SortedKeyList.update
  4. src/sortedcontainers/sortedlist.py::SortedKeyList.__new__
  5. src/sortedcontainers/sortedlist.py::SortedKeyList.__init__
read
+4.94s
turn 1 · NVIDIA-Nemotron-3-Nano-30B-A3B · 4028 in / 81 out · 1.76s · $0.00026

read src/sortedcontainers/sortedlist.py::SortedKeyList.remove

The failing tests involve `remove` and expect a ValueError when removing a non-existent value, but the current implementation uses an infinite loop (`while not (True)`) which never executes the body and thus never raises the error. This suggests a logic error in the `remove` method.

patch
+9.26s
turn 2 · NVIDIA-Nemotron-3-Nano-30B-A3B · 4896 in / 112 out · 1.2s · $0.00032

The `while not (True)` condition is always false, so the loop body never executes. This causes the method to silently fall through without raising a ValueError when the value is not found. Changing it to `while True` allows the loop to execute and properly check for the value, raising ValueError when appropriate.

--- a/src/sortedcontainers/sortedlist.py+++ b/src/sortedcontainers/sortedlist.py@@ -1933,5 +1933,5 @@         len_sublist = len(_keys[pos]) -        while not (True):+        while True:             if _keys[pos][idx] != key:                 raise ValueError(f'{value!r} not in list')

tests: all tests pass 299 passed

Final patch

--- a/src/sortedcontainers/sortedlist.py+++ b/src/sortedcontainers/sortedlist.py@@ -1933,5 +1933,5 @@         len_sublist = len(_keys[pos]) -        while not (True):+        while True:             if _keys[pos][idx] != key:                 raise ValueError(f'{value!r} not in list')