drain99 opened a new issue, #49740:
URL: https://github.com/apache/arrow/issues/49740
### Describe the bug, including details regarding any error messages,
version, and platform.
`_export_to_c` seems to cause segmentation fault for `binary_view` array
constructed as follows:
`ChunkedArray(binary...) --combine--> BinaryArray --cast--> BinaryViewArray`
Reproducer below
```py
import ctypes
import pyarrow as pa
# C Data Interface layouts
class ArrowSchema(ctypes.Structure):
_fields_ = [
("format", ctypes.c_char_p),
("name", ctypes.c_char_p),
("metadata", ctypes.c_char_p),
("flags", ctypes.c_int64),
("n_children", ctypes.c_int64),
("children", ctypes.POINTER(ctypes.c_void_p)),
("dictionary", ctypes.c_void_p),
("release", ctypes.c_void_p),
("private_data", ctypes.c_void_p),
]
class ArrowArray(ctypes.Structure):
_fields_ = [
("length", ctypes.c_int64),
("null_count", ctypes.c_int64),
("offset", ctypes.c_int64),
("n_buffers", ctypes.c_int64),
("n_children", ctypes.c_int64),
("buffers", ctypes.POINTER(ctypes.c_void_p)),
("children", ctypes.POINTER(ctypes.c_void_p)),
("dictionary", ctypes.c_void_p),
("release", ctypes.c_void_p),
("private_data", ctypes.c_void_p),
]
c_array = ArrowArray()
c_schema = ArrowSchema()
arrs = [
# exporting this is fine
pa.array([b'a', b'e', b'a', b'e'], type=pa.binary_view()),
# this also works fine
pa.chunked_array([
pa.array([b'a', b'e'], type=pa.binary_view()),
pa.array([b'a', b'e'], type=pa.binary_view())
]).combine_chunks(),
# chunked(binary...) -> binary -> binary_view segfaults
pa.chunked_array([
pa.array([b'a', b'e'], type=pa.binary()),
pa.array([b'a', b'e'], type=pa.binary())
]).combine_chunks().cast(pa.binary_view()),
]
print(arrs)
print([arr.validate(full=True) for arr in arrs])
arrs[0]._export_to_c(ctypes.addressof(c_array),ctypes.addressof(c_schema),)
arrs[1]._export_to_c(ctypes.addressof(c_array),ctypes.addressof(c_schema),)
# this fails
arrs[2]._export_to_c(ctypes.addressof(c_array),ctypes.addressof(c_schema),)
```
### Component(s)
Python
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