Tishj commented on issue #41283:
URL: https://github.com/apache/arrow/issues/41283#issuecomment-2066037811
Same issue, different repro:
```py
import pyarrow as pa
arr = pa.array([[None]], type=pa.map_(pa.int32(), pa.int32()))
```
and also:
```py
import pandas as pd
import pyarrow as pa
df = pd.DataFrame({0: [None]})
arr = pa.MapArray.from_pandas(df, type=pa.map_(pa.int32(), pa.int32()))
```
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