MutaFix run: toolz-007

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

fixedoutcome
7swall time
2model calls
$0.0005API cost
Benchmark ground truth (hidden from the agent)
toolz/dicttoolz.py:220 · operator NEGCOND · function toolz/dicttoolz.py::dissoc
- if not (key in d2):   (injected bug)+ if key in d2:   (original)
retriever rank 1 of 20 · ranker position 1 · patched the right function yes · exact restore no

Trace

reproduce
+0.45s
4 failing test(s) · 4 failed, 182 passed, 1 skipped, 1 deselected · 0.45s
failing tests and errors
toolz/tests/test_dicttoolz.py::TestDict::test_dissoc
toolz/tests/test_dicttoolz.py::TestDefaultDict::test_dissoc
toolz/tests/test_dicttoolz.py::TestCustomMapping::test_dissoc
toolz/tests/test_dicttoolz.py::test_dissoc_agrees_on_both_sides_of_its_size_heuristic
toolz/tests/test_dicttoolz.py::TestDict::test_dissoc
E   AssertionError: assert {'a': 1, 'b': 2} == {'b': 2}
E     
E     Omitting 1 identical items, use -vv to show
E     Left contains 1 more item:
E     {'a': 1}
E     Use -v to get more diff
toolz/tests/test_dicttoolz.py::TestDefaultDict::test_dissoc
E   AssertionError: assert {'a': 1, 'b': 2} == {'b': 2}
E     
E     Omitting 1 identical items, use -vv to show
E     Left contains 1 more item:
E     {'a': 1}
E     Use -v to get more diff
trace
+0.84s
re-ran 1 test file(s) with the trace plugin: 4 failing and 47 passing tests, 2 library functions ran in a failing test · 0.36s
toolz/tests/test_dicttoolz.py
retrieve
+0.84s
161 functions indexed, 4 reachable from toolz/tests/test_dicttoolz.py::TestDict::test_dissoc in the static call graph. Kept 20 candidates, ranked by spectrum score (Ochiai), call graph and BM25 break ties.
candidates in retriever order
  1. toolz/dicttoolz.py::dissoc call depth 1 · Ochiai 1.00 (failing 4, passing 0)
  2. toolz/dicttoolz.py::_get_factory call depth 2 · Ochiai 0.44 (failing 4, passing 17)
  3. toolz/functoolz.py::Compose.__name__ call depth 3 · Ochiai 0.00 (failing 0, passing 0)
  4. toolz/functoolz.py::excepts.__name__ call depth 3 · Ochiai 0.00 (failing 0, passing 0)
  5. toolz/itertoolz.py::diff call depth - · Ochiai 0.00 (failing 0, passing 0)
  6. toolz/functoolz.py::_check_sigspec call depth - · Ochiai 0.00 (failing 0, passing 0)
  7. toolz/dicttoolz.py::itemfilter call depth - · Ochiai 0.00 (failing 0, passing 3)
  8. toolz/itertoolz.py::join call depth - · Ochiai 0.00 (failing 0, passing 0)
  9. toolz/dicttoolz.py::get_in call depth - · Ochiai 0.00 (failing 0, passing 2)
  10. toolz/itertoolz.py::pluck call depth - · Ochiai 0.00 (failing 0, passing 0)
  11. toolz/dicttoolz.py::merge_with call depth - · Ochiai 0.00 (failing 0, passing 7)
  12. toolz/functoolz.py::memoize call depth - · Ochiai 0.00 (failing 0, passing 0)
  13. toolz/_signatures.py::check_valid call depth - · Ochiai 0.00 (failing 0, passing 0)
  14. toolz/itertoolz.py::get call depth - · Ochiai 0.00 (failing 0, passing 0)
  15. toolz/itertoolz.py::concat call depth - · Ochiai 0.00 (failing 0, passing 0)
  16. toolz/__init__.py::__getattr__ call depth - · Ochiai 0.00 (failing 0, passing 1)
  17. toolz/functoolz.py::compose_left call depth - · Ochiai 0.00 (failing 0, passing 0)
  18. toolz/curried/exceptions.py::merge call depth - · Ochiai 0.00 (failing 0, passing 0)
  19. toolz/curried/exceptions.py::merge_with call depth - · Ochiai 0.00 (failing 0, passing 0)
  20. toolz/itertoolz.py::partition_all call depth - · Ochiai 0.00 (failing 0, passing 0)
rank
+0.84s
spectrum order kept (no model call)
  1. toolz/dicttoolz.py::dissoc
  2. toolz/dicttoolz.py::_get_factory
  3. toolz/functoolz.py::Compose.__name__
  4. toolz/functoolz.py::excepts.__name__
  5. toolz/itertoolz.py::diff
read
+3.0s
turn 1 · NVIDIA-Nemotron-3-Nano-30B-A3B · 2867 in / 144 out · 2.16s · $0.00021

read toolz/dicttoolz.py::dissoc

The failing tests are all related to the `test_dissoc` method in the dicttoolz module, and the only function directly involved in those failures is `dissoc` in toolz/dicttoolz.py. The error messages show that the result of `dissoc` is missing an item that should be present, indicating a logic error in how keys are removed or how the new dictionary is constructed. The `_get_factory` function is a helper and does not directly affect the correctness of the `dissoc` behavior, and the other candidates are unrelated to dict dissocation.

patch
+6.53s
turn 2 · NVIDIA-Nemotron-3-Nano-30B-A3B · 3442 in / 207 out · 2.88s · $0.00026

The current logic incorrectly adds all items from the original dictionary to the new dictionary (d2.update(d)) and then attempts to delete keys only if they are not present in d2, which leads to the wrong items being retained. The failing tests expect that only the specified keys are removed, and no extra items are left behind. The patch removes the problematic update logic and directly deletes each key from d2 if it exists, which correctly implements the intended behavior of removing only the specified keys without affecting other items.

--- a/toolz/dicttoolz.py+++ b/toolz/dicttoolz.py@@ -215,9 +215,7 @@     d2 = factory() -    if len(keys) < len(d) * .6:-        d2.update(d)-        for key in keys:-            if not (key in d2):-                del d2[key]+    for key in keys:+        if key in d2:+            del d2[key]     else:         remaining = set(d)

tests: all tests pass 186 passed, 1 skipped, 1 deselected

Final patch

--- a/toolz/dicttoolz.py+++ b/toolz/dicttoolz.py@@ -215,9 +215,7 @@     d2 = factory() -    if len(keys) < len(d) * .6:-        d2.update(d)-        for key in keys:-            if not (key in d2):-                del d2[key]+    for key in keys:+        if key in d2:+            del d2[key]     else:         remaining = set(d)