bkietz commented on code in PR #36018:
URL: https://github.com/apache/arrow/pull/36018#discussion_r1231097263
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cpp/src/arrow/array/data.cc:
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@@ -265,13 +266,12 @@ int GetNumBuffers(const DataType& type) {
namespace internal {
void FillZeroLengthArray(const DataType* type, ArraySpan* span) {
- memset(span->scratch_space, 0x00, sizeof(span->scratch_space));
-
span->type = type;
span->length = 0;
int num_buffers = GetNumBuffers(*type);
for (int i = 0; i < num_buffers; ++i) {
- span->buffers[i].data = reinterpret_cast<uint8_t*>(span->scratch_space);
+ static int64_t zero{0};
+ span->buffers[i].data = reinterpret_cast<uint8_t*>(&zero);
Review Comment:
This buffer is not allowed to be null, since it holds offsets
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