MutaFix run: toolz-010

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

fixedoutcome
6swall time
2model calls
$0.0003API cost
Benchmark ground truth (hidden from the agent)
toolz/functoolz.py:43 · operator CONST · function toolz/functoolz.py::apply
- func, args = func_and_args[1], func_and_args[1:]   (injected bug)+ func, args = func_and_args[0], func_and_args[1:]   (original)
retriever rank 1 of 20 · ranker position 1 · patched the right function yes · exact restore yes

Trace

reproduce
+0.42s
1 failing test(s) · 1 failed, 185 passed, 1 skipped, 1 deselected · 0.42s
failing tests and errors
toolz/tests/test_functoolz.py::test_apply
toolz/tests/test_functoolz.py::test_apply
E   TypeError: 'int' object is not callable
trace
+0.81s
re-ran 1 test file(s) with the trace plugin: 1 failing and 38 passing tests, 2 library functions ran in a failing test · 0.35s
toolz/tests/test_functoolz.py
retrieve
+0.81s
161 functions indexed, 4 reachable from toolz/tests/test_functoolz.py::test_apply 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/functoolz.py::apply call depth 1 · Ochiai 1.00 (failing 1, passing 0)
  2. toolz/__init__.py::__getattr__ call depth - · Ochiai 1.00 (failing 1, passing 0)
  3. toolz/utils.py::raises call depth 1 · Ochiai 0.00 (failing 0, passing 10)
  4. toolz/functoolz.py::curry.func call depth 2 · Ochiai 0.00 (failing 0, passing 17)
  5. toolz/functoolz.py::curry.args call depth 2 · Ochiai 0.00 (failing 0, passing 16)
  6. toolz/itertoolz.py::tail call depth - · Ochiai 0.00 (failing 0, passing 0)
  7. toolz/dicttoolz.py::itemmap call depth - · Ochiai 0.00 (failing 0, passing 0)
  8. toolz/functoolz.py::thread_last call depth - · Ochiai 0.00 (failing 0, passing 1)
  9. toolz/dicttoolz.py::keymap call depth - · Ochiai 0.00 (failing 0, passing 0)
  10. toolz/itertoolz.py::iterate call depth - · Ochiai 0.00 (failing 0, passing 0)
  11. toolz/functoolz.py::curry.__init__ call depth - · Ochiai 0.00 (failing 0, passing 20)
  12. toolz/functoolz.py::thread_first call depth - · Ochiai 0.00 (failing 0, passing 1)
  13. toolz/dicttoolz.py::valmap call depth - · Ochiai 0.00 (failing 0, passing 0)
  14. toolz/functoolz.py::do call depth - · Ochiai 0.00 (failing 0, passing 1)
  15. toolz/itertoolz.py::diff call depth - · Ochiai 0.00 (failing 0, passing 0)
  16. toolz/functoolz.py::memoize.<locals>.memof call depth - · Ochiai 0.00 (failing 0, passing 8)
  17. toolz/itertoolz.py::take call depth - · Ochiai 0.00 (failing 0, passing 0)
  18. toolz/dicttoolz.py::get_in call depth - · Ochiai 0.00 (failing 0, passing 0)
  19. toolz/_signatures.py::signature_or_spec call depth - · Ochiai 0.00 (failing 0, passing 12)
  20. toolz/itertoolz.py::isiterable call depth - · Ochiai 0.00 (failing 0, passing 0)
rank
+0.81s
spectrum order kept (no model call)
  1. toolz/functoolz.py::apply
  2. toolz/__init__.py::__getattr__
  3. toolz/utils.py::raises
  4. toolz/functoolz.py::curry.func
  5. toolz/functoolz.py::curry.args
read
+2.79s
turn 1 · NVIDIA-Nemotron-3-Nano-30B-A3B · 1536 in / 134 out · 1.98s · $0.00012

read toolz/functoolz.py::apply

The failing test involves the `apply` function, and the source of `apply` in toolz/functoolz.py shows a clear bug: on line 43 it assigns `func, args = func_and_args[1], func_and_args[1:]`, which incorrectly skips the first element of `func_and_args` when unpacking. This would cause `func` to be bound to the second element instead of the first, leading to a TypeError when trying to call it. This is the most likely source of the failure.

patch
+5.96s
turn 2 · NVIDIA-Nemotron-3-Nano-30B-A3B · 1940 in / 138 out · 2.52s · $0.00015

The bug is in line 43: it incorrectly uses `func_and_args[1]` to extract the function, skipping the first element. It should use `func_and_args[0]` to get the first argument as the function. This change aligns with the expected behavior of `apply` as shown in the doctest and the failing test.

--- a/toolz/functoolz.py+++ b/toolz/functoolz.py@@ -41,5 +41,5 @@     if not func_and_args:         raise TypeError('func argument is required')-    func, args = func_and_args[1], func_and_args[1:]+    func, args = func_and_args[0], func_and_args[1:]     return func(*args, **kwargs)

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

Final patch

--- a/toolz/functoolz.py+++ b/toolz/functoolz.py@@ -41,5 +41,5 @@     if not func_and_args:         raise TypeError('func argument is required')-    func, args = func_and_args[1], func_and_args[1:]+    func, args = func_and_args[0], func_and_args[1:]     return func(*args, **kwargs)