ZhangHuiGui opened a new issue, #40276:
URL: https://github.com/apache/arrow/issues/40276
### Describe the bug, including details regarding any error messages,
version, and platform.
An implicit buffer-overflow bug in blow codes:
```c
for (int x = 0; x < kValueSize; x++) {
v.emplace_back(100 + x, 100 + x);
}
for (auto _ : state) {
BasicDecimal128 result;
for (int x = 0; x < 100; x++) { // should be kValueSize
result += v[x];
}
benchmark::DoNotOptimize(result);
}
```
### Component(s)
C++
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