lgbo-ustc opened a new issue, #12169:
URL: https://github.com/apache/gluten/issues/12169
### Backend
CH (ClickHouse)
### Bug description
`cpp-ch/local-engine/Functions/SparkFunctionStrToMap.cpp:241-244` reads one
past the nullable null map.
`executeImpl` iterates rows with `i`, but checks `(*null_map)[n]`, where `n`
is `offsets.size()`. For any non-empty `Nullable(String)` input, this is one
past the end of the null map. The result can be a wrong null decision,
undefined behavior, or a crash. The null check should use the current row index
`i`.
### Gluten version
_No response_
### Spark version
None
### Spark configurations
_No response_
### System information
_No response_
### Relevant logs
```bash
```
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