Run overview

swe_bench / lite / dev

Run 8866c69c...4b98

CompletedLive stream off

Deploy

Benchmark pass rate

0 of 2 tasks passed

0% pass rate means none of the benchmark tasks passed.

Passed

Tasks that passed

Failed

Tasks that failed

Total spend

$0.47

Duration 130 s

Completed tasks: 2

Throughput: 0.9 / min

Started Apr 1, 2026, 6:03 AM UTCFinished Apr 1, 2026, 6:05 AM UTC

Task review

Completed tasks

2 completed tasks. Open a card only when you need logs, patch text, or scoring detail.

marshmallow-code__marshmallow-1359

marshmallow-code/marshmallow

failed

Score

Outcome

Did not pass

Task cost

$0.24

Duration

120 s

Summary

Did not pass

[anthropic-agent] Attempt 1: python syntax error in src/marshmallow/fields.py: unexpected indent at line 1120 [anthropic-agent] Attempt 2: Anthropic call failed for search_replace: Anthropic request failed: HTTPStatusError: Server error '529 <none>' for url 'https://api.anthropic.com/v1/messages' For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/529. Response body: {"type":"error","error":{"type":"overloaded_error","message":"Overloaded"},"request_id":"req_011CZcYcpndWNdVYoKD6cFZV"} [anthropic-agent] Attempt 3: python syntax error in src/marshmallow/__init__.py: invalid syntax at line 1 [anthropic-agent] Attempt 4: File-rewrite plan contained no files.

View task details

Run metadata

Benchmark

swe_bench/lite/dev

Model

claude-sonnet-4-5-20250929

Started

Apr 1, 2026, 6:03 AM UTC

Completed

Apr 1, 2026, 6:05 AM UTC

Sandbox

344f8220-ef4c-409c-9a21-ac150a379eba

Tokens

In 18,147 / out 4,790

F2P / P2P

Pending

Passed benchmark

Queued

Sandbox

Agent

Grading

Done

Completed

Benchmark context

Task input

3.0: DateTime fields cannot be used as inner field for List or Tuple fields
Between releases 3.0.0rc8 and 3.0.0rc9, `DateTime` fields have started throwing an error when being instantiated as inner fields of container fields like `List` or `Tuple`. The snippet below works in <=3.0.0rc8 and throws the error below in >=3.0.0rc9 (and, worryingly, 3.0.0):

```python
from marshmallow import fields, Schema

class MySchema(Schema):
    times = fields.List(fields.DateTime())

s = MySchema()
```

Traceback:
```
Traceback (most recent call last):
  File "test-mm.py", line 8, in <module>
    s = MySchema()
  File "/Users/victor/.pyenv/versions/marshmallow/lib/python3.6/site-packages/marshmallow/schema.py", line 383, in __init__
    self.fields = self._init_fields()
  File "/Users/victor/.pyenv/versions/marshmallow/lib/python3.6/site-packages/marshmallow/schema.py", line 913, in _init_fields
    self._bind_field(field_name, field_obj)
  File "/Users/victor/.pyenv/versions/marshmallow/lib/python3.6/site-packages/marshmallow/schema.py", line 969, in _bind_field
    field_obj._bind_to_schema(field_name, self)
  File "/Users/victor/.pyenv/versions/marshmallow/lib/python3.6/site-packages/marshmallow/fields.py", line 636, in _bind_to_schema
    self.inner._bind_to_schema(field_name, self)
  File "/Users/victor/.pyenv/versions/marshmallow/lib/python3.6/site-packages/marshmallow/fields.py", line 1117, in _bind_to_schema
    or getattr(schema.opts, self.SCHEMA_OPTS_VAR_NAME)
AttributeError: 'List' object has no attribute 'opts'
```

It seems like it's treating the parent field as a Schema without checking that it is indeed a schema, so the `schema.opts` statement fails as fields don't have an `opts` attribute.

Fix tests

tests/test_fields.py::TestParentAndName::test_datetime_list_inner_format

Regression tests

tests/test_fields.py::test_field_aliases[Integer-Integer]
tests/test_fields.py::test_field_aliases[String-String]
tests/test_fields.py::test_field_aliases[Boolean-Boolean]
tests/test_fields.py::test_field_aliases[Url-Url]
tests/test_fields.py::TestField::test_repr
tests/test_fields.py::TestField::test_error_raised_if_uncallable_validator_passed
tests/test_fields.py::TestField::test_error_raised_if_missing_is_set_on_required_field
tests/test_fields.py::TestField::test_custom_field_receives_attr_and_obj
tests/test_fields.py::TestField::test_custom_field_receives_data_key_if_set
tests/test_fields.py::TestField::test_custom_field_follows_data_key_if_set
tests/test_fields.py::TestParentAndName::test_simple_field_parent_and_name
tests/test_fields.py::TestParentAndName::test_unbound_field_root_returns_none
tests/test_fields.py::TestParentAndName::test_list_field_inner_parent_and_name
tests/test_fields.py::TestParentAndName::test_tuple_field_inner_parent_and_name
tests/test_fields.py::TestParentAndName::test_mapping_field_inner_parent_and_name
tests/test_fields.py::TestParentAndName::test_simple_field_root
tests/test_fields.py::TestParentAndName::test_list_field_inner_root
tests/test_fields.py::TestParentAndName::test_tuple_field_inner_root
tests/test_fields.py::TestParentAndName::test_list_root_inheritance
tests/test_fields.py::TestParentAndName::test_dict_root_inheritance
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[String]
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[Integer]
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[Boolean]
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[Float]
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[Number]
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[DateTime]
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[Time]
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[Date]
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[TimeDelta]
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[Dict]
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[Url]
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[Email]
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[UUID]
tests/test_fields.py::TestMetadata::test_extra_metadata_may_be_added_to_field[Decimal]
tests/test_fields.py::TestErrorMessages::test_default_error_messages_get_merged_with_parent_error_messages_cstm_msg
tests/test_fields.py::TestErrorMessages::test_default_error_messages_get_merged_with_parent_error_messages
tests/test_fields.py::TestErrorMessages::test_make_error[required-Missing
tests/test_fields.py::TestErrorMessages::test_make_error[null-Field
tests/test_fields.py::TestErrorMessages::test_make_error[custom-Custom
tests/test_fields.py::TestErrorMessages::test_make_error[validator_failed-Invalid
tests/test_fields.py::TestErrorMessages::test_fail[required-Missing
tests/test_fields.py::TestErrorMessages::test_fail[null-Field
tests/test_fields.py::TestErrorMessages::test_fail[custom-Custom
tests/test_fields.py::TestErrorMessages::test_fail[validator_failed-Invalid
tests/test_fields.py::TestErrorMessages::test_make_error_key_doesnt_exist
tests/test_fields.py::TestNestedField::test_nested_only_and_exclude_as_string[only]
tests/test_fields.py::TestNestedField::test_nested_only_and_exclude_as_string[exclude]
tests/test_fields.py::TestNestedField::test_nested_unknown_override[None-exclude]
tests/test_fields.py::TestNestedField::test_nested_unknown_override[None-include]
tests/test_fields.py::TestNestedField::test_nested_unknown_override[None-raise]
tests/test_fields.py::TestNestedField::test_nested_unknown_override[exclude-exclude]
tests/test_fields.py::TestNestedField::test_nested_unknown_override[exclude-include]
tests/test_fields.py::TestNestedField::test_nested_unknown_override[exclude-raise]
tests/test_fields.py::TestNestedField::test_nested_unknown_override[include-exclude]
tests/test_fields.py::TestNestedField::test_nested_unknown_override[include-include]
tests/test_fields.py::TestNestedField::test_nested_unknown_override[include-raise]
tests/test_fields.py::TestNestedField::test_nested_unknown_override[raise-exclude]
tests/test_fields.py::TestNestedField::test_nested_unknown_override[raise-include]
tests/test_fields.py::TestNestedField::test_nested_unknown_override[raise-raise]
tests/test_fields.py::TestListNested::test_list_nested_only_exclude_dump_only_load_only_propagated_to_nested[only]
tests/test_fields.py::TestListNested::test_list_nested_only_exclude_dump_only_load_only_propagated_to_nested[exclude]
tests/test_fields.py::TestListNested::test_list_nested_only_exclude_dump_only_load_only_propagated_to_nested[dump_only]
tests/test_fields.py::TestListNested::test_list_nested_only_exclude_dump_only_load_only_propagated_to_nested[load_only]
tests/test_fields.py::TestListNested::test_list_nested_only_and_exclude_merged_with_nested[only-expected0]
tests/test_fields.py::TestListNested::test_list_nested_only_and_exclude_merged_with_nested[exclude-expected1]
tests/test_fields.py::TestListNested::test_list_nested_partial_propagated_to_nested
tests/test_fields.py::TestTupleNested::test_tuple_nested_only_exclude_dump_only_load_only_propagated_to_nested[dump_only]
tests/test_fields.py::TestTupleNested::test_tuple_nested_only_exclude_dump_only_load_only_propagated_to_nested[load_only]
tests/test_fields.py::TestTupleNested::test_tuple_nested_partial_propagated_to_nested
tests/test_fields.py::TestDictNested::test_dict_nested_only_exclude_dump_only_load_only_propagated_to_nested[only]
tests/test_fields.py::TestDictNested::test_dict_nested_only_exclude_dump_only_load_only_propagated_to_nested[exclude]
tests/test_fields.py::TestDictNested::test_dict_nested_only_exclude_dump_only_load_only_propagated_to_nested[dump_only]
tests/test_fields.py::TestDictNested::test_dict_nested_only_exclude_dump_only_load_only_propagated_to_nested[load_only]
tests/test_fields.py::TestDictNested::test_dict_nested_only_and_exclude_merged_with_nested[only-expected0]
tests/test_fields.py::TestDictNested::test_dict_nested_only_and_exclude_merged_with_nested[exclude-expected1]
tests/test_fields.py::TestDictNested::test_dict_nested_partial_propagated_to_nested

Execution

Scorer detail

[anthropic-agent] Attempt 1: python syntax error in src/marshmallow/fields.py: unexpected indent at line 1120
[anthropic-agent] Attempt 2: Anthropic call failed for search_replace: Anthropic request failed: HTTPStatusError: Server error '529 <none>' for url 'https://api.anthropic.com/v1/messages'
For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/529. Response body: {"type":"error","error":{"type":"overloaded_error","message":"Overloaded"},"request_id":"req_011CZcYcpndWNdVYoKD6cFZV"}
[anthropic-agent] Attempt 3: python syntax error in src/marshmallow/__init__.py: invalid syntax at line 1
[anthropic-agent] Attempt 4: File-rewrite plan contained no files.

Patch text

{"output": "", "patch_text": "", "stdout": "[anthropic-agent] instance=marshmallow-code__marshmallow-1359\n[anthropic-agent] repo=marshmallow-code/marshmallow\n[anthropic-agent] sandbox=344f8220-ef4c-409c-9a21-ac150a379eba\n[anthropic-agent] model=claude-sonnet-4-5-20250929\n[anthropic-agent] context_files=6\n[anthropic-agent] full_file_context=yes\n[anthropic-agent] edit_attempts=4", "stderr": "[anthropic-agent] Attempt 1: python syntax error in src/marshmallow/fields.py: unexpected indent at line 1120\n[anthropic-agent] Attempt 2: Anthropic call failed for search_replace: Anthropic request failed: HTTPStatusError: Server error '529 <none>' for url 'https://api.anthropic.com/v1/messages'\nFor more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/529. Response body: {\"type\":\"error\",\"error\":{\"type\":\"overloaded_error\",\"message\":\"Overloaded\"},\"request_id\":\"req_011CZcYcpndWNdVYoKD6cFZV\"}\n[anthropic-agent] Attempt 3: python syntax error in src/marshmallow/__init__.py: invalid syntax at line 1\n[anthropic-agent] Attempt 4: File-rewrite plan contained no files.", "model_name": "claude-sonnet-4-5-20250929", "prompt_tokens": 18147, "completion_tokens": 4790, "reported_cost_usd": 0.042097}

Stdout

[anthropic-agent] instance=marshmallow-code__marshmallow-1359
[anthropic-agent] repo=marshmallow-code/marshmallow
[anthropic-agent] sandbox=344f8220-ef4c-409c-9a21-ac150a379eba
[anthropic-agent] model=claude-sonnet-4-5-20250929
[anthropic-agent] context_files=6
[anthropic-agent] full_file_context=yes
[anthropic-agent] edit_attempts=4

Stderr

[anthropic-agent] Attempt 1: python syntax error in src/marshmallow/fields.py: unexpected indent at line 1120
[anthropic-agent] Attempt 2: Anthropic call failed for search_replace: Anthropic request failed: HTTPStatusError: Server error '529 <none>' for url 'https://api.anthropic.com/v1/messages'
For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/529. Response body: {"type":"error","error":{"type":"overloaded_error","message":"Overloaded"},"request_id":"req_011CZcYcpndWNdVYoKD6cFZV"}
[anthropic-agent] Attempt 3: python syntax error in src/marshmallow/__init__.py: invalid syntax at line 1
[anthropic-agent] Attempt 4: File-rewrite plan contained no files.

Agent output

{"output": "", "patch_text": "", "stdout": "[anthropic-agent] instance=marshmallow-code__marshmallow-1359\n[anthropic-agent] repo=marshmallow-code/marshmallow\n[anthropic-agent] sandbox=344f8220-ef4c-409c-9a21-ac150a379eba\n[anthropic-agent] model=claude-sonnet-4-5-20250929\n[anthropic-agent] context_files=6\n[anthropic-agent] full_file_context=yes\n[anthropic-agent] edit_attempts=4", "stderr": "[anthropic-agent] Attempt 1: python syntax error in src/marshmallow/fields.py: unexpected indent at line 1120\n[anthropic-agent] Attempt 2: Anthropic call failed for search_replace: Anthropic request failed: HTTPStatusError: Server error '529 <none>' for url 'https://api.anthropic.com/v1/messages'\nFor more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/529. Response body: {\"type\":\"error\",\"error\":{\"type\":\"overloaded_error\",\"message\":\"Overloaded\"},\"request_id\":\"req_011CZcYcpndWNdVYoKD6cFZV\"}\n[anthropic-agent] Attempt 3: python syntax error in src/marshmallow/__init__.py: invalid syntax at line 1\n[anthropic-agent] Attempt 4: File-rewrite plan contained no files.", "model_name": "claude-sonnet-4-5-20250929", "prompt_tokens": 18147, "completion_tokens": 4790, "reported_cost_usd": 0.042097}

Scoring

Passing target tests

No fail-to-pass successes recorded yet.

Failing target tests

No fail-to-pass failures recorded yet.

Maintained regression tests

No pass-to-pass successes recorded yet.

Regressed tests

No regression failures recorded yet.

Harness output

No harness output captured yet.

Reference output

diff --git a/src/marshmallow/fields.py b/src/marshmallow/fields.py
--- a/src/marshmallow/fields.py
+++ b/src/marshmallow/fields.py
@@ -1114,7 +1114,7 @@ def _bind_to_schema(self, field_name, schema):
         super()._bind_to_schema(field_name, schema)
         self.format = (
             self.format
-            or getattr(schema.opts, self.SCHEMA_OPTS_VAR_NAME)
+            or getattr(self.root.opts, self.SCHEMA_OPTS_VAR_NAME)
             or self.DEFAULT_FORMAT
         )

marshmallow-code__marshmallow-1343

marshmallow-code/marshmallow

failed

Score

Outcome

Did not pass

Task cost

$0.23

Duration

116 s

Summary

Did not pass

[anthropic-agent] Attempt 1: python syntax error in src/marshmallow/schema.py: invalid syntax at line 902 [anthropic-agent] Attempt 2: Anthropic call failed for search_replace: Anthropic request failed: HTTPStatusError: Server error '529 <none>' for url 'https://api.anthropic.com/v1/messages' For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/529. Response body: {"type":"error","error":{"type":"overloaded_error","message":"Overloaded"},"request_id":"req_011CZcYcfJdCRFDb51exDj4V"} [anthropic-agent] Attempt 3: file 1: rewrite only changed trailing newlines in src/marshmallow/base.py [anthropic-agent] Attempt 4: File-rewrite plan contained no files.

View task details

Run metadata

Benchmark

swe_bench/lite/dev

Model

claude-sonnet-4-5-20250929

Started

Apr 1, 2026, 6:03 AM UTC

Completed

Apr 1, 2026, 6:05 AM UTC

Sandbox

a581b0f0-1212-4d3d-9b65-2ba60de82b6e

Tokens

In 12,195 / out 5,293

F2P / P2P

Pending

Passed benchmark

Queued

Sandbox

Agent

Grading

Done

Completed

Benchmark context

Task input

[version 2.20.0] TypeError: 'NoneType' object is not subscriptable
After update from version 2.19.5 to 2.20.0 I got error for code like:

```python
from marshmallow import Schema, fields, validates


class Bar(Schema):
    value = fields.String()

    @validates('value')  # <- issue here
    def validate_value(self, value):
        pass


class Foo(Schema):
    bar = fields.Nested(Bar)


sch = Foo()

sch.validate({
    'bar': 'invalid',
})
```

```
Traceback (most recent call last):
  File "/_/bug_mschema.py", line 19, in <module>
    'bar': 'invalid',
  File "/_/env/lib/python3.7/site-packages/marshmallow/schema.py", line 628, in validate
    _, errors = self._do_load(data, many, partial=partial, postprocess=False)
  File "/_/env/lib/python3.7/site-packages/marshmallow/schema.py", line 670, in _do_load
    index_errors=self.opts.index_errors,
  File "/_/env/lib/python3.7/site-packages/marshmallow/marshalling.py", line 292, in deserialize
    index=(index if index_errors else None)
  File "/_/env/lib/python3.7/site-packages/marshmallow/marshalling.py", line 65, in call_and_store
    value = getter_func(data)
  File "/_/env/lib/python3.7/site-packages/marshmallow/marshalling.py", line 285, in <lambda>
    data
  File "/_/env/lib/python3.7/site-packages/marshmallow/fields.py", line 265, in deserialize
    output = self._deserialize(value, attr, data)
  File "/_/env/lib/python3.7/site-packages/marshmallow/fields.py", line 465, in _deserialize
    data, errors = self.schema.load(value)
  File "/_/env/lib/python3.7/site-packages/marshmallow/schema.py", line 588, in load
    result, errors = self._do_load(data, many, partial=partial, postprocess=True)
  File "/_/env/lib/python3.7/site-packages/marshmallow/schema.py", line 674, in _do_load
    self._invoke_field_validators(unmarshal, data=result, many=many)
  File "/_/env/lib/python3.7/site-packages/marshmallow/schema.py", line 894, in _invoke_field_validators
    value = data[field_obj.attribute or field_name]
TypeError: 'NoneType' object is not subscriptable
```

Fix tests

tests/test_marshalling.py::TestUnmarshaller::test_deserialize_wrong_nested_type_with_validates_method

Regression tests

tests/test_marshalling.py::test_missing_is_falsy
tests/test_marshalling.py::TestMarshaller::test_prefix
tests/test_marshalling.py::TestMarshaller::test_marshalling_generator
tests/test_marshalling.py::TestMarshaller::test_default_to_missing
tests/test_marshalling.py::TestMarshaller::test_serialize_fields_with_load_only_param
tests/test_marshalling.py::TestMarshaller::test_missing_data_are_skipped
tests/test_marshalling.py::TestMarshaller::test_serialize_with_load_only_doesnt_validate
tests/test_marshalling.py::TestMarshaller::test_serialize_fields_with_dump_to_param
tests/test_marshalling.py::TestMarshaller::test_serialize_fields_with_dump_to_and_prefix_params
tests/test_marshalling.py::TestMarshaller::test_stores_indices_of_errors_when_many_equals_true
tests/test_marshalling.py::TestMarshaller::test_doesnt_store_errors_when_index_errors_equals_false
tests/test_marshalling.py::TestUnmarshaller::test_extra_data_is_ignored
tests/test_marshalling.py::TestUnmarshaller::test_stores_errors
tests/test_marshalling.py::TestUnmarshaller::test_stores_indices_of_errors_when_many_equals_true
tests/test_marshalling.py::TestUnmarshaller::test_doesnt_store_errors_when_index_errors_equals_false
tests/test_marshalling.py::TestUnmarshaller::test_deserialize
tests/test_marshalling.py::TestUnmarshaller::test_extra_fields
tests/test_marshalling.py::TestUnmarshaller::test_deserialize_many
tests/test_marshalling.py::TestUnmarshaller::test_deserialize_stores_errors
tests/test_marshalling.py::TestUnmarshaller::test_deserialize_fields_with_attribute_param
tests/test_marshalling.py::TestUnmarshaller::test_deserialize_fields_with_load_from_param
tests/test_marshalling.py::TestUnmarshaller::test_deserialize_fields_with_dump_only_param
tests/test_marshalling.py::TestUnmarshaller::test_deserialize_wrong_type_root_data
tests/test_marshalling.py::TestUnmarshaller::test_deserialize_wrong_type_nested_data

Execution

Scorer detail

[anthropic-agent] Attempt 1: python syntax error in src/marshmallow/schema.py: invalid syntax at line 902
[anthropic-agent] Attempt 2: Anthropic call failed for search_replace: Anthropic request failed: HTTPStatusError: Server error '529 <none>' for url 'https://api.anthropic.com/v1/messages'
For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/529. Response body: {"type":"error","error":{"type":"overloaded_error","message":"Overloaded"},"request_id":"req_011CZcYcfJdCRFDb51exDj4V"}
[anthropic-agent] Attempt 3: file 1: rewrite only changed trailing newlines in src/marshmallow/base.py
[anthropic-agent] Attempt 4: File-rewrite plan contained no files.

Patch text

{"output": "", "patch_text": "", "stdout": "[anthropic-agent] instance=marshmallow-code__marshmallow-1343\n[anthropic-agent] repo=marshmallow-code/marshmallow\n[anthropic-agent] sandbox=a581b0f0-1212-4d3d-9b65-2ba60de82b6e\n[anthropic-agent] model=claude-sonnet-4-5-20250929\n[anthropic-agent] context_files=5\n[anthropic-agent] full_file_context=yes\n[anthropic-agent] edit_attempts=4", "stderr": "[anthropic-agent] Attempt 1: python syntax error in src/marshmallow/schema.py: invalid syntax at line 902\n[anthropic-agent] Attempt 2: Anthropic call failed for search_replace: Anthropic request failed: HTTPStatusError: Server error '529 <none>' for url 'https://api.anthropic.com/v1/messages'\nFor more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/529. Response body: {\"type\":\"error\",\"error\":{\"type\":\"overloaded_error\",\"message\":\"Overloaded\"},\"request_id\":\"req_011CZcYcfJdCRFDb51exDj4V\"}\n[anthropic-agent] Attempt 3: file 1: rewrite only changed trailing newlines in src/marshmallow/base.py\n[anthropic-agent] Attempt 4: File-rewrite plan contained no files.", "model_name": "claude-sonnet-4-5-20250929", "prompt_tokens": 12195, "completion_tokens": 5293, "reported_cost_usd": 0.03866}

Stdout

[anthropic-agent] instance=marshmallow-code__marshmallow-1343
[anthropic-agent] repo=marshmallow-code/marshmallow
[anthropic-agent] sandbox=a581b0f0-1212-4d3d-9b65-2ba60de82b6e
[anthropic-agent] model=claude-sonnet-4-5-20250929
[anthropic-agent] context_files=5
[anthropic-agent] full_file_context=yes
[anthropic-agent] edit_attempts=4

Stderr

[anthropic-agent] Attempt 1: python syntax error in src/marshmallow/schema.py: invalid syntax at line 902
[anthropic-agent] Attempt 2: Anthropic call failed for search_replace: Anthropic request failed: HTTPStatusError: Server error '529 <none>' for url 'https://api.anthropic.com/v1/messages'
For more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/529. Response body: {"type":"error","error":{"type":"overloaded_error","message":"Overloaded"},"request_id":"req_011CZcYcfJdCRFDb51exDj4V"}
[anthropic-agent] Attempt 3: file 1: rewrite only changed trailing newlines in src/marshmallow/base.py
[anthropic-agent] Attempt 4: File-rewrite plan contained no files.

Agent output

{"output": "", "patch_text": "", "stdout": "[anthropic-agent] instance=marshmallow-code__marshmallow-1343\n[anthropic-agent] repo=marshmallow-code/marshmallow\n[anthropic-agent] sandbox=a581b0f0-1212-4d3d-9b65-2ba60de82b6e\n[anthropic-agent] model=claude-sonnet-4-5-20250929\n[anthropic-agent] context_files=5\n[anthropic-agent] full_file_context=yes\n[anthropic-agent] edit_attempts=4", "stderr": "[anthropic-agent] Attempt 1: python syntax error in src/marshmallow/schema.py: invalid syntax at line 902\n[anthropic-agent] Attempt 2: Anthropic call failed for search_replace: Anthropic request failed: HTTPStatusError: Server error '529 <none>' for url 'https://api.anthropic.com/v1/messages'\nFor more information check: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/529. Response body: {\"type\":\"error\",\"error\":{\"type\":\"overloaded_error\",\"message\":\"Overloaded\"},\"request_id\":\"req_011CZcYcfJdCRFDb51exDj4V\"}\n[anthropic-agent] Attempt 3: file 1: rewrite only changed trailing newlines in src/marshmallow/base.py\n[anthropic-agent] Attempt 4: File-rewrite plan contained no files.", "model_name": "claude-sonnet-4-5-20250929", "prompt_tokens": 12195, "completion_tokens": 5293, "reported_cost_usd": 0.03866}

Scoring

Passing target tests

No fail-to-pass successes recorded yet.

Failing target tests

No fail-to-pass failures recorded yet.

Maintained regression tests

No pass-to-pass successes recorded yet.

Regressed tests

No regression failures recorded yet.

Harness output

No harness output captured yet.

Reference output

diff --git a/src/marshmallow/schema.py b/src/marshmallow/schema.py
--- a/src/marshmallow/schema.py
+++ b/src/marshmallow/schema.py
@@ -877,7 +877,7 @@ def _invoke_field_validators(self, unmarshal, data, many):
                 for idx, item in enumerate(data):
                     try:
                         value = item[field_obj.attribute or field_name]
-                    except KeyError:
+                    except (KeyError, TypeError):
                         pass
                     else:
                         validated_value = unmarshal.call_and_store(
@@ -892,7 +892,7 @@ def _invoke_field_validators(self, unmarshal, data, many):
             else:
                 try:
                     value = data[field_obj.attribute or field_name]
-                except KeyError:
+                except (KeyError, TypeError):
                     pass
                 else:
                     validated_value = unmarshal.call_and_store(

Rerun config

Reuse this benchmark setup

Copy the config or relaunch the same run shape.

Benchmark

swe_bench / lite / dev

Concurrency

Agent image

agentarena-build:8866c69cf16a4fbdb897cd71d1144b98

Build source

https://github.com/jiviny/Benchmark-Testing@HEAD

Show exact run metadata

2 pinned instances, 2 sandboxes, 1 reported models.

Pinned instance ids

marshmallow-code__marshmallow-1343marshmallow-code__marshmallow-1359

Sandbox ids

a581b0f0-1212-4d3d-9b65-2ba60de82b6e344f8220-ef4c-409c-9a21-ac150a379eba

Run started

Apr 1, 2026, 6:03 AM UTC

Run completed

Apr 1, 2026, 6:05 AM UTC

Reported models

claude-sonnet-4-5-20250929

Operational details

Build, live sandbox activity, and recent events

Collapsed by default for finished runs.

Build Completed2 events

Agent build

Status: Completed

Source https://github.com/jiviny/Benchmark-Testing@HEAD | agentarena-build:8866c69cf16a4fbdb897cd71d1144b98

Started Apr 1, 2026, 6:03 AM UTC | Completed Apr 1, 2026, 6:03 AM UTC

Show build log

Cloning into '/tmp/agentarena-build-wqsmfxff/repo'...
Sending build context to Docker daemon  102.4kB

Step 1/5 : FROM python:3.11-slim
 ---> e67db9b14d09
Step 2/5 : WORKDIR /app
 ---> Running in e7691180e94b
 ---> Removed intermediate container e7691180e94b
 ---> e29d968ae992
Step 3/5 : COPY . /app
 ---> 1305a5c3a8cc
Step 4/5 : RUN if [ -f requirements.txt ]; then python -m pip install --no-cache-dir -r requirements.txt; fi
 ---> Running in 0ddca0b3bc6e
Collecting fastapi>=0.104 (from -r requirements.txt (line 1))
  Downloading fastapi-0.135.2-py3-none-any.whl.metadata (28 kB)
Collecting httpx (from -r requirements.txt (line 2))
  Downloading httpx-0.28.1-py3-none-any.whl.metadata (7.1 kB)
Collecting pydantic>=2.0 (from -r requirements.txt (line 3))
  Downloading pydantic-2.12.5-py3-none-any.whl.metadata (90 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 90.6/90.6 kB 81.1 MB/s eta 0:00:00
Collecting pydantic-settings (from -r requirements.txt (line 4))
  Downloading pydantic_settings-2.13.1-py3-none-any.whl.metadata (3.4 kB)
Collecting eval_type_backport (from -r requirements.txt (line 5))
  Downloading eval_type_backport-0.3.1-py3-none-any.whl.metadata (2.4 kB)
Collecting starlette>=0.46.0 (from fastapi>=0.104->-r requirements.txt (line 1))
  Downloading starlette-1.0.0-py3-none-any.whl.metadata (6.3 kB)
Collecting typing-extensions>=4.8.0 (from fastapi>=0.104->-r requirements.txt (line 1))
  Downloading typing_extensions-4.15.0-py3-none-any.whl.metadata (3.3 kB)
Collecting typing-inspection>=0.4.2 (from fastapi>=0.104->-r requirements.txt (line 1))
  Downloading typing_inspection-0.4.2-py3-none-any.whl.metadata (2.6 kB)
Collecting annotated-doc>=0.0.2 (from fastapi>=0.104->-r requirements.txt (line 1))
  Downloading annotated_doc-0.0.4-py3-none-any.whl.metadata (6.6 kB)
Collecting anyio (from httpx->-r requirements.txt (line 2))
  Downloading anyio-4.13.0-py3-none-any.whl.metadata (4.5 kB)
Collecting certifi (from httpx->-r requirements.txt (line 2))
  Downloading certifi-2026.2.25-py3-none-any.whl.metadata (2.5 kB)
Collecting httpcore==1.* (from httpx->-r requirements.txt (line 2))
  Downloading httpcore-1.0.9-py3-none-any.whl.metadata (21 kB)
Collecting idna (from httpx->-r requirements.txt (line 2))
  Downloading idna-3.11-py3-none-any.whl.metadata (8.4 kB)
Collecting h11>=0.16 (from httpcore==1.*->httpx->-r requirements.txt (line 2))
  Downloading h11-0.16.0-py3-none-any.whl.metadata (8.3 kB)
Collecting annotated-types>=0.6.0 (from pydantic>=2.0->-r requirements.txt (line 3))
  Downloading annotated_types-0.7.0-py3-none-any.whl.metadata (15 kB)
Collecting pydantic-core==2.41.5 (from pydantic>=2.0->-r requirements.txt (line 3))
  Downloading pydantic_core-2.41.5-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.metadata (7.3 kB)
Collecting python-dotenv>=0.21.0 (from pydantic-settings->-r requirements.txt (line 4))
  Downloading python_dotenv-1.2.2-py3-none-any.whl.metadata (27 kB)
Downloading fastapi-0.135.2-py3-none-any.whl (117 kB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 117.4/117.4 kB 281.4 MB/s eta 0:00:00
Downloading httpx-0.28.1-py3-none-any.whl (73 kB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 73.5/73.5 kB 290.3 MB/s eta 0:00:00
Downloading httpcore-1.0.9-py3-none-any.whl (78 kB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 78.8/78.8 kB 96.8 MB/s eta 0:00:00
Downloading pydantic-2.12.5-py3-none-any.whl (463 kB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 463.6/463.6 kB 106.8 MB/s eta 0:00:00
Downloading pydantic_core-2.41.5-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (2.1 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 2.1/2.1 MB 162.8 MB/s eta 0:00:00
Downloading pydantic_settings-2.13.1-py3-none-any.whl (58 kB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 58.9/58.9 kB 283.2 MB/s eta 0:00:00
Downloading eval_type_backport-0.3.1-py3-none-any.whl (6.1 kB)
Downloading annotated_doc-0.0.4-py3-none-any.whl (5.3 kB)
Downloading annotated_types-0.7.0-py3-none-any.whl (13 kB)
Downloading python_dotenv-1.2.2-py3-none-any.whl (22 kB)
Downloading starlette-1.0.0-py3-none-any.whl (72 kB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 72.7/72.7 kB 298.8 MB/s eta 0:00:00
Downloading anyio-4.13.0-py3-none-any.whl (114 kB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 114.4/114.4 kB 329.6 MB/s eta 0:00:00
Downloading idna-3.11-py3-none-any.whl (71 kB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 71.0/71.0 kB 297.9 MB/s eta 0:00:00
Downloading typing_extensions-4.15.0-py3-none-any.whl (44 kB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 44.6/44.6 kB 267.2 MB/s eta 0:00:00
Downloading typing_inspection-0.4.2-py3-none-any.whl (14 kB)
Downloading certifi-2026.2.25-py3-none-any.whl (153 kB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 153.7/153.7 kB 345.1 MB/s eta 0:00:00
Downloading h11-0.16.0-py3-none-any.whl (37 kB)
Installing collected packages: typing-extensions, python-dotenv, idna, h11, eval_type_backport, certifi, annotated-types, annotated-doc, typing-inspection, pydantic-core, httpcore, anyio, starlette, pydantic, httpx, pydantic-settings, fastapi
Successfully installed annotated-doc-0.0.4 annotated-types-0.7.0 anyio-4.13.0 certifi-2026.2.25 eval_type_backport-0.3.1 fastapi-0.135.2 h11-0.16.0 httpcore-1.0.9 httpx-0.28.1 idna-3.11 pydantic-2.12.5 pydantic-core-2.41.5 pydantic-settings-2.13.1 python-dotenv-1.2.2 starlette-1.0.0 typing-extensions-4.15.0 typing-inspection-0.4.2
[91mWARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
[0m[91m
[notice] A new release of pip is available: 24.0 -> 26.0.1
[notice] To update, run: pip install --upgrade pip
[0m ---> Removed intermediate container 0ddca0b3bc6e
 ---> 0611ccb14405
Step 5/5 : CMD ["python", "/app/agent.py"]
 ---> Running in 6890afac545e
 ---> Removed intermediate container 6890afac545e
 ---> 140c519b6c36
Successfully built 140c519b6c36
Successfully tagged agentarena-build:8866c69cf16a4fbdb897cd71d1144b98
DEPRECATED: The legacy builder is deprecated and will be removed in a future release.
            BuildKit is currently disabled; enable it by removing the DOCKER_BUILDKIT=0
            environment-variable.

Sandbox activity

Active sandboxes

Completed 2

No active sandboxes right now.

Recent events

Latest run activity

marshmallow-code__marshmallow-1359

6:05 AM

marshmallow-code__marshmallow-1359344f8220...Completed

marshmallow-code__marshmallow-1343

6:05 AM

marshmallow-code__marshmallow-1343a581b0f0...Completed